Open Access
Open access
Journal of CO2 Utilization, volume 38, pages 16-23

Solar-driven CO2 conversion over Co2+ doped 0D/2D TiO2/g-C3N4 heterostructure: Insights into the role of Co2+ and cocatalyst

Publication typeJournal Article
Publication date2020-05-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor7.7
ISSN22129820, 22129839
Process Chemistry and Technology
Waste Management and Disposal
Chemical Engineering (miscellaneous)
Abstract
Low charge separation efficiency is the critical limitation for solar-driven CO2 conversion into chemicals fuels. Accelerating charge transfer in the interface of photocatalysts is an intriguing approach to suppress charge recombination. Herein, Co2+ doped 0D/2D TiO2 quantum dots confined in graphitic carbon nitride (CoTiCN) heterostructure was prepared by in-situ pyrolysis of MOFs and urea. Co2+ serves as the bridge of linking 0D TiO2 and 2D g-C3N4 in the interface, and consequently accelerates charge transfer in the interface from 2D g-C3N4 to 0D TiO2. As a result, CO evolution rate for photocatalytic CO2 reduction reached 290 μmol g−1 h−1, much higher than those of pure g-C3N4 and TiO2/g-C3N4. In addition, photocatalytic mechanism study indicates that [Co(bpy)3]Cl2 in the system functions as cocatalyst without any photocatalytic activity under visible light irradiation. Electron transfer occurs from heterogeneous photocatalyst to [Co(bpy)3]Cl2, which acts as the electron transporter as active sites to catalyze CO2 reduction into CO. This work provides an insight into the design of metal doped 0D/2D material towards visible light driven CO2 reduction from the viewpoint of promoting charge transfer in the interface and the understanding of the photocatalytic mechanism of cocatalyst in system.

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GOST Copy
Shi H. et al. Solar-driven CO2 conversion over Co2+ doped 0D/2D TiO2/g-C3N4 heterostructure: Insights into the role of Co2+ and cocatalyst // Journal of CO2 Utilization. 2020. Vol. 38. pp. 16-23.
GOST all authors (up to 50) Copy
Shi H., Du J., Hou J., Ni W., Song C., Li K., Gurzadyan G. G., Gao L. Solar-driven CO2 conversion over Co2+ doped 0D/2D TiO2/g-C3N4 heterostructure: Insights into the role of Co2+ and cocatalyst // Journal of CO2 Utilization. 2020. Vol. 38. pp. 16-23.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1016/j.jcou.2020.01.005
UR - https://doi.org/10.1016/j.jcou.2020.01.005
TI - Solar-driven CO2 conversion over Co2+ doped 0D/2D TiO2/g-C3N4 heterostructure: Insights into the role of Co2+ and cocatalyst
T2 - Journal of CO2 Utilization
AU - Shi, Hainan
AU - Du, Jun
AU - Hou, Jungang
AU - Ni, Wenjun
AU - Song, Chunshan
AU - Li, Keyan
AU - Gurzadyan, Gagik G.
AU - Gao, Linna
PY - 2020
DA - 2020/05/01 00:00:00
PB - Elsevier
SP - 16-23
VL - 38
SN - 2212-9820
SN - 2212-9839
ER -
BibTex
Cite this
BibTex Copy
@article{2020_Shi,
author = {Hainan Shi and Jun Du and Jungang Hou and Wenjun Ni and Chunshan Song and Keyan Li and Gagik G. Gurzadyan and Linna Gao},
title = {Solar-driven CO2 conversion over Co2+ doped 0D/2D TiO2/g-C3N4 heterostructure: Insights into the role of Co2+ and cocatalyst},
journal = {Journal of CO2 Utilization},
year = {2020},
volume = {38},
publisher = {Elsevier},
month = {may},
url = {https://doi.org/10.1016/j.jcou.2020.01.005},
pages = {16--23},
doi = {10.1016/j.jcou.2020.01.005}
}
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