Analytica Chimica Acta, volume 1245, pages 340880

A membrane/mediator-free high-power density dual-photoelectrode PFC aptasensor for lincomycin detection in milk and chicken

Publication typeJournal Article
Publication date2023-03-01
scimago Q1
wos Q1
SJR0.998
CiteScore10.4
Impact factor5.7
ISSN00032670, 18734324
Biochemistry
Spectroscopy
Analytical Chemistry
Environmental Chemistry
Abstract
Over use of lincomycin (LIN) as antibiotic in animals can lead to multiple harmful impacts to public health, thus detection of LIN at trace level in milk and chicken sample matrixes is vital. In this work, Zinc phthalocyanine nanoparticles sensitized MoS2 (ZnPc/MoS2) was firstly developed as a novel photocathode material combined with nitrogen-doped graphene-loaded TiO2 nanoparticles (TiO2/NG) as photoanode material to construct a dual-photoelectrode photofuel cell (PFC). The as-prepared membrane/mediator-free PFC achieved excellent output performance that the maximum power density (Pmax) reached 11.83 μW cm-2. Specific aptamers are adopted as LIN recognition elements, the as-proposed self-powered aptasensor for LIN exhibited a linear scope in 10-11 -10-5 mol L-1 along with a low detection limit (3S/N) of 3.33 pmol L-1. Consequently, such high-power density dual-photoelectrode PFC aptasensor may be a reassuring candidate electrochemical sensor for the detection of trace contamination in food samples.
Wen Z., Ding L., Zhu W., You F., Wang T., Hao N., Wei J., Wang K.
2022-09-01 citations by CoLab: 10 Abstract  
Signal amplification strategies are of great interest in photoelectrochemical (PEC) sensing research. Herein, we explored a novel approach whereby hole transfer was accelerated from the photosensitive material Blue-TiO 2 (B-TiO 2 ) to the hole mediator N-hydroxyphthalimide (NHPI). Simultaneously, the introduction of the organic molecule NHPI can promote the efficiency of visible light absorption and expand the absorption range of B-TiO 2 . Under visible light irradiation, the photocurrent value of NHPI/B-TiO 2 is 2.7-fold larger than that of B-TiO 2 , which can be ascribed to the acceleration of hole transfer by NHPI. More specifically, NHPI acts as a hole mediator, which effectively transfers photo-generated holes from the valence band (VB) of B-TiO 2 to NHPI. NHPI can be oxidized to phthalimide-N-oxyl radical (PINO*), thereby causing inhibition of photo-generated carrier recombination and enhancement of the photocurrent. Furthermore, a PEC aptasensor for the sensitive detection of diazinon (DIA) was constructed by combining specific aptamers on an NHPI/B-TiO 2 nanocomposite surface. The oxidation product of NHPI, PINO*, oxidizes the DIA captured by the aptamer. Under optimized experimental conditions, the linear range for DIA detection was 0.1–1000 nM, and the detection limit of the NHPI/B-TiO 2 nanocomposite aptamer sensing was 0.03 nM (S/N = 3). Therefore, this proposed method involving the hole mediator can be used as a new strategy to improve the performance of PEC. • A new strategy for enhancing photoelectrochemical (PEC) signals was developed. • Hole mediator can accelerate photo-generated holes transfer. • Hole mediator can be oxidized by photo-generated holes and promote redox reaction. • Organic molecule have the advantage of high visible light absorption efficiency. • The PEC aptasensor exhibited excellent selectivity and sensitivity for Diazinon.
Wen Z., Zhu W., You F., Yuan R., Ding L., Hao N., Wei J., Wang K.
Biosensors and Bioelectronics scimago Q1 wos Q1
2022-05-01 citations by CoLab: 40 Abstract  
Carbendazim (CBZ) has been widely used in agricultural production to control fruits and vegetables diseases, but it can also destroy the human endocrine system. Therefore, sensitive detection of CBZ has attracted increasing attention worldwide. In this study, Pd nanoparticles (Pd NPs) decorated on CdS microsphere (Pd NPs/CdS) was prepared by the in-situ photoreduced method, and based on the surface plasmon resonance (SPR) effect of noble metal and Schottky junction between Pd nanoparticles (Pd NPs) and CdS microsphere, the photocurrent after introducing Pd NPs is 7.7 times higher than that of bare CdS microsphere. In view of the outstanding photoelectrochemical (PEC) performance of Pd NPs/CdS and the high specificity of the aptamer, the as-fabricated PEC aptasensor for CBZ detection possesses the excellent detection performance including a broad linear ranging from 1.0 × 10-12 to 1.0 × 10-6 mol/L as a low detection limit of 3.3 × 10-13 mol/L (S/N = 3). Furthermore, the PEC aptasensor was used for determination of lettuce samples from actual agricultural products with satisfactory results.
Li J., Luo M., Jin C., Zhang P., Yang H., Cai R., Tan W.
2022-01-03 citations by CoLab: 60 Abstract  
Plasmonic bimetal nanostructures can be employed to amplify electrochemiluminescence (ECL) signals. In this work, a high-performance ECL platform was constructed using a europium metal-organic framework (MOF) as a luminophore and Au-Pt bimetallic nanorods (NRs) as a plasma source. Due to the SPR effect of Au-Pt NRs, the aptasensor exhibits 2.6-fold ECL intensity compared to that of pure polyaniline (PANI)-decorated perylene tetracarboxylic dianhydride (PTCA)/Eu MOF. Moreover, decoration with PTP greatly enhances the conductivity and stability of Eu MOF, resulting in sizeable plasmon-enhanced electrochemical luminescence. The as-designed plasmon-enhanced ECL aptasensor displayed highly sensitive detection for lincomycin (Lin). The as-proposed aptasensor could quantify Lin from 0.1 mg/mL to 0.1 ng/mL with a limit of detection (LOD) of 0.026 ng/mL.
Zhou Y., Yin H., Ai S.
Coordination Chemistry Reviews scimago Q1 wos Q1
2021-11-01 citations by CoLab: 181 Abstract  
• The application of two-dimensional layered materials in PEC sensor was reviewed. • The detection performances of these PEC sensor were compared. • The research trends and challenges of this field are presented. As an emerging innovative detection technique, photoelectrochemical (PEC) assay has played an important role in the advancement of analytical methods. Up to now, PEC technique has received more attentions owing to the advantages of low background signal, easy operation, inexpensive instrument and high sensitivity. In the construction of PEC sensing platform, an appropriate photoelectrode is essential, where semiconductors are very attractive due to their excellent photoactivity. Among various semiconductors, two-dimensional (2D) layered nanomaterials are of great interest because of the merits of high specific surface area, fast electron transfer rate, good light harvest property, easy preparation and exfoliation, and good biocompatibility. Currently, the impetus for the application of 2D layered nanomaterials in PEC sensing and biosensing has grown rapidly. In this work, the advance of the application of 2D layered nanomaterials in PEC assay field was reviewed, where 2D layered nanomaterials includes graphene and its derivatives, graphite carbon nitride, transition metal dichalcogenides (MoS 2 , MoSe 2 , WS 2 , and WSe 2 ), bismuth oxyhalides (BiOCl, BiOBr and BiOI), hexagonal boron nitride, borocarbonitrides, MXene (Ti 3 C 2 and Ti 3 C 2 T x ), Bi 2 Te 3 , metal–organic frameworks, covalent organic frameworks, phosphorene, graphdiyne, layered double hydroxides, Xenes and perovskite. The detection performances of these PEC sensor and biosensor based on 2D layered nanomaterials were compared for various targets. The future prospects were also discussed.
Peng J., Yang J., Chen B., Zeng S., Zheng D., Chen Y., Gao W.
Biosensors and Bioelectronics scimago Q1 wos Q1
2021-03-01 citations by CoLab: 63 Abstract  
Herein, a high-efficiency photoactive material, hollow ZnIn2S4 nanocages (ZIS-HNCs) composed of ultrathin nanosheets were creatively synthesized via a metal-organic framework (MOF) derived solvothermal method. It had been specified the underlying mechanism of the ZIS-HNCs evolution under the MOF templated surface. Subsequently, the obtained ZIS-HNCs combined with annealing TiO2 modified electrode (ZIS-HNCs@TiO2), and the ZIS-HNCs@TiO2 exhibited intense transient photocurrent. The enhanced photocurrent signal benefited from the multiple light capture effect of ZIS-HNCs, ultrathin nanosheet subunits of ZIS-HNCs, and typical type Ⅱ heterojunction, which could effectively retard the photoexcited electron-hole pairs recombination, and accelerated charge separation and transfer. Taking antibiotic lincomycin (Lin) as a model, a signal-off photoelectrochemical (PEC) aptasensor based on the ZIS-HNCs@TiO2 was established and manifested a high sensitive detection for Lin with a linear response range from 0.0001 to 0.1 nM as well as an ultralow detection limit of 0.084 pM. Additionally, the proposed PEC aptasensor showed acceptable stability and remarkable selectivity. Therefore, this study provides a promising strategy to design nanomaterials with superior photoelectric activity for PEC sensing applications.
Zhou Y., Yin H., Zhao W., Ai S.
Coordination Chemistry Reviews scimago Q1 wos Q1
2020-12-01 citations by CoLab: 98 Abstract  
• Detection of epigenetic modifiers using electrochemical-based methods was reviewed. • Epigenetic modifiers includes nucleic modification and protein modification. • DNA modifications mean DNA methylation, hydroxymethylation and formylation. • Protein modifications mean phosphorylation and acetylation. • The research trends and challenges were discussed. Epigenetic modifications mainly includes nucleic modifications and histone modifications, which play crucial role in biological processes, such as gene and microRNA expression, DNA-protein interactions, suppression of transposable element mobility, etc. The abnormal expression of epigenetic modifiers is related to various diseases. Thus, the quantitative analysis of epigenetic modifiers is crucial to early diagnosis of disease, drug screening, prognosis of disease treatment, discovery of new biological function. Up to now, various methods have been developed for epigenetic modifier detection, including thin layer chromatography, northern blotting, microarray, chromatography-based technology, fluorescence, colorimetry, surface plasmon resonance, surface enhanced Raman spectroscopy, electrochemistry, etc. Among them, electrochemical-based techniques have received widespread attentions due to the merits of simple operation, fast response, radioactive labeling-free, low-dose reagent, inexpensive and portable instrument, high sensitivity. Therefore, in this paper, the application of electrochemical techniques for determining epigenetic biomarkers in last ten years are reviewed, in which the electrochemical techniques include electrochemistry, photoelectrochemistry and electrochemiluminescence, and the epigenetic modifiers contain DNA methylation (5-methylcytosine and 7-methylguanine), DNA hydroxymethylation (5-hydroxymethylcytosine), DNA formylation (5-formylcytosine), RNA methylation (N 6 -methyladenosine), protein phosphorylation and protein acetylation. In addition, application of these techniques for the determination of the relative enzymes is also reviewed. Moreover, the research trends and challenges in the development of electrochemical-based methods for monitoring epigenetic biomarkers were discussed.
Li F., Zhou Y., Yin H., Ai S.
Biosensors and Bioelectronics scimago Q1 wos Q1
2020-10-01 citations by CoLab: 113 Abstract  
As an important non-coding, evolutionary conserved, and post-transcriptional gene regulators of genome, microRNAs (miRNAs) have received extensive attention from various disciplines in the important role of biological processes and the connection with various diseases. It is also a new type of tumor marker with high specificity and sensitivity. Due to their important diagnostic values and crucial biological functions, miRNA detection attracts widespread interests. Due to the merits of low interference background, low cost, simple operation, fast response, inexpensive equipment, excellent sensitivity, and instrument miniaturization photoelectrochemical technique has been widely applied in the field of miRNA assay. As an important factor affecting the detection sensitivity, the signal amplification strategy is very important for PEC sensor. The purpose of this review is to introduce the signal amplification strategies involved into the PEC sensing filed for miRNA detection in the past five years, considering their advantages and disadvantages, and to open up new approaches in biological analysis and early disease diagnosis. The future prospects and current challenges are also discussed.
Yan P., Mo Z., Dong J., Chen F., Qian J., Xia J., Xu L., Zhang J., Li H.
2020-10-01 citations by CoLab: 27 Abstract  
Lincomycin (Lin) exhibits diverse toxic effects on both public health and environmental quality. A self-powered photoelectrochemical (PEC) Lin aptasensor has been constructed based on Mn valence-engineered MnO2/BiOCl heterojunction (MnV-MnO2/BiOCl). MnV-MnO2/BiOCl can achieve effective utilization of light and rapid separation and transfer of photogenerated carriers. The formation of MnV-MnO2/BiOCl was accompanied by the introduction of unsaturated Mn3+. Unsaturated Mn3+ not only can form a redox pair with Mn4+, acting as an electron/hole trap center, but also endows MnV-MnO2 with half-metallic character, thus improving the electronic property and conductivity of MnV-MnO2 in MnV-MnO2/BiOCl. The synergy in these aspects contributed to dramatic improvement of photoelectric conversion efficiency about MnV-MnO2/BiOCl. The separated holes in MnV-MnO2/BiOCl can oxidize Lin trapped by aptamer, which hinders electrons-hole recombination and leads to enhancement of photocurrent. This PEC Lin aptasensor based on MnV-MnO2/BiOCl/ITO exhibited a linear scope in 1.0 × 10−3–1.0 × 103  nM with detection limit of 3.33 × 10−4 nM. Besides, the aptasensor presented admiring selectivity, stability and reproducibility. This work verified that the simultaneous utilization of an electron/hole trap center and heterojunction construction can cooperatively enhance PEC performance and broaden the application of BiOCl in PEC field.
Xu Y., Jiang D., Zhang M., Zhang Z., Qian J., Hao N., Ding C., Wang K.
2020-08-01 citations by CoLab: 47 Abstract  
The development of photoactive materials with high photoelectrochemical (PEC) activity and stability is of great significance for PEC biosensors. In this work, the performance of carbon vacancies (CVs) in PEC biosensors was explored. A facile one-pot hydrothermal approach was used to prepare Bi-doped ultrathin polymeric carbon nitride (Bi/CV-PCN) nanocomposites with CVs, which displayed high PEC activity and stability. The surface plasmon resonance (SPR) effect of Bi boosted the visible light capture, and the intermediate energy levels induced by CVs generation enhanced charge separation efficiency, resulting in a remarkable improvement in PEC stability. Furthermore, the PEC signal of the Bi/CV-PCN was 24-fold, 6-fold and 2-fold higher than that of pristine Bi, graphitic carbon nitride and PCN, respectively. Based on its promising PEC properties, Bi/CV-PCN was utilized as the photoactive material for the sensitive and selective detection of enrofloxacin (ENR) in the concentration range of 1.0 × 10―5―1.0 × 103 ng·mL―1, with a limit of detection of 3.3 × 10―6 ng·mL―1. This work could not only provide new insights for the development of materials with high PEC activity and stability, but also offer a simple and high-performance method to detect ENR.
Chen Y., Ji W., Gao J., Yan K., Zhang J.
Chemical Communications scimago Q1 wos Q2
2020-07-14 citations by CoLab: 25 Abstract  
A capacitor that acts as signal amplifier and a digital multimeter that serves as the readout are coupled with a photocatalytic fuel cell to construct a self-powered sensing system for the detection of streptomycin.
Zhang M., Zhang Z., Xu Y., Wen Z., Ding C., Guo Y., Wang K.
Biosensors and Bioelectronics scimago Q1 wos Q1
2020-05-01 citations by CoLab: 47 Abstract  
Self-powered sensor is considered as a promising, rapid, portable and miniaturized detection device that can work without external power input. In this work, a novel dual-photoelectrode self-powered aptasensor for digoxin detection was designed on the basis of a photofuel cell (PFC) composed of a black TiO2 (B–TiO2) photoanode and a CuBr photocathode in a single-chamber cell. The sensing platform avoided the use of membrane, free mediator, bioactive components and costly metal Pt electrodes. The large inherent bias between the Fermi energy level of B–TiO2 and that of CuBr improved the electricity output of PFC that the open circuit potential (OCP) and the maximum power density (Pmax) reached 0.58 V and 6.78 μW cm-2 respectively. Based on the excellent output of PFC, digoxin aptamer was immobilized on photoanode as the recognition element to capture digoxin molecules, which realized the high sensitive and selective detection of digoxin. The self-powered aptasensor displayed a broad linear in the range from 10-12 M to 10-5 M with a detection limit (3 S/N) of 0.33 pM. This work paved a luciferous way for further rapid, portable, miniaturized and on-site self-powered sensors.
Zhang X., Peng J., Ding Y., Zheng D., Lin Y., Chen Y., Gao W.
2020-03-01 citations by CoLab: 39 Abstract  
The construction of heterostructures is considered as an effective strategy to facilitate migration of photogenerated carriers and boost the photoelectrochemical (PEC) performances. Herein, a novel hierarchical hollow ZnCdS@MoS2 heterostructured cages derived from metal-organic frameworks (MOFs) were synthesized by solvothermal and hydrothermal methods. The morphology of MoS2 grown on the surface of ZnCdS polyhedral cages could be well-controlled by changing the experimental conditions. Under visible light irradiation, compared with pristine ZnCdS and MoS2, the PEC response of the ZnCdS@MoS2 was enhanced by 3.1-fold and 47.3-fold, respectively. The enhanced PEC properties were ascribed to the synergy between tailored hierarchical hollow structure and close contact heterojunction interface, which can promote visible-light harvesting, accelerate charge migration, and curb recombination of photogenerated carriers. Benefiting from the remarkable PEC performance of hierarchical hollow ZnCdS@MoS2 heterostructured cages, a label-free PEC aptasensor platform was constructed for lincomycin detection with excellent selectivity and sensitivity. The developed PEC aptasensor displayed a wide liner response of 1×10−10 to 3 × 10-7 mol L-1 with a low detection limit of 7.6 × 10-11 mol L-1. This work demonstrates the marvelous potential of hierarchical hollow ZnCdS@MoS2 heterostructured cages in PEC sensing applications. Most importantly, this work opens an avenue for the design and synthesis of MOF-derived novel heterostructures.
Ding L., Jiang D., Wen Z., Xu Y., Guo Y., Ding C., Wang K.
Biosensors and Bioelectronics scimago Q1 wos Q1
2020-02-01 citations by CoLab: 48 Abstract  
Developing a simple, rapid detection method for the analysis of edifenphos (EDI) is crucial due to its residue is harmful to acetylcholinesterase on the human cellular system, and cause a lot of complications. Herein, we synthesized visible light-responsive MoS 2 nanosheets decorated with Zinc phthalocyanine (ZnPc) nanoparticles (ZnPc/n-MoS 2 ). Due to the sensitization of ZnPc nanoparticles, the resulting ZnPc/n-MoS 2 exhibited narrower energy bandgap and efficient charge transfer. Especially, the carrier lifetime of ZnPc/n-MoS 2 is 2 more times longer than n-MoS 2 , and the photocurrent intensity of ZnPc/n-MoS 2 is 24 times of n-MoS 2 and 22 times of ZnPc nanoparticles under visible light irradiation. Further, a visible light-responsive ultrasensitive photoelectrochemical (PEC) aptasensor for selectivity recognition of EDI was triumphantly established by using EDI aptamer as a biorecognition element, which exhibited a wide linear ranking from 5 ng L –1 to 10 μg L –1 (R 2 = 0.996) and a low detection limit of 1.667 ng L –1 (S/N = 3). The splendid performance of the ZnPc/n-MoS 2 nanosheet ultrasensitive sensing platform can be applied to detect the concentration of EDI in food, biomedical and environmental analysis. • Visible light-responsive ZnPc/n-MoS 2 was fabricated used ZnPc nanoparticles as sensitizer. • The carrier lifetime and photocurrent intensity of ZnPc/n-MoS 2 is 2 more and 24 times of n-MoS 2 , respectively. • A visible light-driven PEC edifenphos aptasensor was firstly successfully established. • The proposed aptasensor exhibited good selectivity and sensitivity for edifenphos detection.
Sun M., Zhu Y., Yan K., Zhang J.
Biosensors and Bioelectronics scimago Q1 wos Q1
2019-12-01 citations by CoLab: 43 Abstract  
CdS-In2S3 heterojunction with enhanced photoelectrochemical (PEC) performance was synthesized to construct dual-mode visible light-induced biosensors for highly sensitive and selective detection of bleomycin (BLM). Due to improved absorption in the visible region and suppressed recombination of electron-hole pairs in the heterojunction, CdS-In2S3 composite exhibited enhanced photocurrent response under visible light illumination. Using CdS-In2S3 as photoactive materials and BLM-binding aptamer as recognition element, a PEC aptasensor displaying a declined photocurrent response to BLM was facilely constructed, which was linear to BLM concentration in the range of 5.0-250 nM. On the other hand, the CdS-In2S3 photoanode was employed to construct a photofuel cell (PFC). In such a PFC, the oxidation of water on CdS-In2S3 photoanode under visible light illumination and the reduction of oxygen on Pt cathode led to the generation of electricity. When BLM-binding aptamer was immobilized on CdS-In2S3 photoanode, the output power of the PFC was inversely proportional to the logarithm of BLM concentration from 10 to 250 nM, offering a visible light-induced self-powered sensing platform for BLM detection. Both of the proposed sensors showed high selectivity, good reproducibility and high stability. They were successfully applied to the determination of BLM in human serum samples.
Yun J., Keerthana S., Kwon S.
Sensors and Actuators Reports scimago Q1 wos Q2 Open Access
2025-06-01 citations by CoLab: 0
Luo X., Li S., Wu Y., Tan F., Li C., Gu W., Liu J., Zhu C.
2025-04-01 citations by CoLab: 0
Liu J., Zheng J., Lu Y., Feng Z., Zhang S., Sun T.
Food Chemistry scimago Q1 wos Q1
2024-12-01 citations by CoLab: 2 Abstract  
17β-E
Zhu J., Shao D., Wen W., Tian Z., Zhang X., Wang S.
Coordination Chemistry Reviews scimago Q1 wos Q1
2024-11-01 citations by CoLab: 9
Du X., Ji X., Hong J., Shao J., Shi R., Lu Q., Jiang X., Sun J.
2024-10-01 citations by CoLab: 2
Yuan R., Ma H., Min Y., Ding L., Li B., Wang K.
Talanta scimago Q1 wos Q1
2024-07-01 citations by CoLab: 4 Abstract  
The detection of transmissible gastroenteritis virus (TGEV) is of great significance to reduce the loss of pig industry. A LAMP-visualization/PFC self-powered dual-mode output sensor platform was constructed to detect TGEV by combining a simple and intuitive photoelectrochromic material with a highly sensitive PFC self-powered sensing platform without external power supply. The PFC sensing substrate was constructed using CdS nanoparticles modified ZnO NRs (CdS/ZnO NRs) as the photoanode, which exhibited high photoactivity, and Prussian blue (PB) as the cathode. After LAMP reaction on the optical anode, visual signals caused by PB discolorimetry can be detected semi-quantitatively, or PFC power density electrical signals collected by electrochemical workstation can be used. The output power density value is logarithm of TGEV concentration. The linear relationship was good within the detection range of 0.075 fg/μL-7.5 ng/μL, with a detection limit of 0.025 fg/μL (S/N = 3). This multi-signal output sensing platform provides more choices for quantifying TGEV detection results, and the two methods can be mutually verified, which meets the needs of different scenarios and improves the reliability of detection. It has a good effect in the actual sample detection, without the use of expensive and complex instruments, and has a broad application prospect.
Wen Z., Qin P., Wan C., Peng G., Ding L., Yang G., Wang K.
2024-02-01 citations by CoLab: 4 Abstract  
The residual of atrazine (ATZ) can disrupt the production of testosterone in animals, causing chemical castration in animals. Therefore, the monitoring of ATZ residue is essential for human health and ecological balance. Herein, a novel dual-signal amplification photofuel cells (PFC) aptasensor was proposed. The presence of a hole mediator and hollow structure enhances the efficiency of electron-hole pair separation and visible light absorption in the photoanode. Additionally, the effect of dye sensitization plays a crucial role in improving the conversion efficiency of photon-to-electrons in the photocathode. The as-prepared aptasensor realized sensitive detection of ATZ, with a board linear range from 1.0 × 10-13 ~ 1.0 × 10-6 mol L-1 and a low detection limit of 3.3 × 10-14 mol L-1. The reliability of the as-prepared PFC aptasensor was verified by gas chromatography-mass spectrometry (GC-MS). Therefore, the manufactured PFC aptasensor is a prospective detection method for fruit and vegetables safety analysis.
Shen Y., Zeng X., Chen M., Du Y., Cheng J., Xie Q.
Analytica Chimica Acta scimago Q1 wos Q1
2023-10-01 citations by CoLab: 1 Abstract  
Lincomycin (LIN) is a common antibiotic that is widely used in animal husbandry and other fields, and the residual problem caused by its abuse has attracted widespread attention. Herein, a novel AgI-carboxylated multiwalled carbon nanotubes (cMWCNT)-BiOI Z-scheme heterojunction material was synthesized via a one-pot hydrothermal method, modified to a fluorine-doped tin oxide (FTO) electrode surface, and used for detecting LIN. The photocurrent on the AgI-cMWCNT-BiOI/FTO photoelectrode is 4.6 times that on the control AgI-BiOI/FTO photoelectrode. An amino-functionalized LIN aptamer was fixed on the AgI-cMWCNT-BiOI/FTO photoelectrode by the cross-linking reaction between chitosan and glutaraldehyde, and then Ru(NH3)63+ was electrostatically attached to the LIN aptamer to increase the photocurrent response to the LIN binding. When LIN binds competitively with Ru(NH3)63+ to the aptamer, the photocurrent signal can be quantitatively decreased. Under optimized conditions, the anodic photocurrent at 0 V vs KCl-saturated calomel electrode in 0.1 M phosphate buffer (pH 7.0) containing 0.100 M ascorbic acid was linear with the common logarithm of LIN concentration from 10.0 pM to 500 nM, with a limit of detection of 2.8 pM (S/N = 3). Satisfactory recovery results were obtained in the analysis of cow milk samples.
Li J., Luo M., Yang H., Cai R., Tan W.
Analytical Chemistry scimago Q1 wos Q1
2023-08-31 citations by CoLab: 22
Yarkaeva Y.A., Dymova D.A., Nazyrov M.I., Zagitova L.R., Maistrenko V.N.
Chimica Techno Acta scimago Q4 Open Access
2023-04-28 citations by CoLab: 0 Abstract  
For the selective detection of the antibiotic lincomycin, we developed a voltammetric sensor based on a glassy carbon electrode modified with reduced graphene oxide and polyarylenephthalide containing diphenylenethio and diphenyleneoxide fragments in the main chain of the polymer in the 1:1 ratio with lincomycin molecular imprints obtained by phase inversion. Using FTIR spectroscopy, electrochemical impedance spectroscopy, cyclic and differential-pulse voltammetry, the electrochemical and analytical characteristics of the sensor were studied. The detection of lincomycin was carried out by differential pulse voltammetry. The linear concentration range was 2.5·10–7–5·10–4 M with a limit of detection of 6.8·10–8 M. It was shown that the presence of molecular imprints increases the sensitivity of the developed sensor in comparisons with a sensor with non-imprinted polymer by a factor of 3.05.

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