Applied Surface Science, volume 528, pages 146943

Highly efficient CH3OH production over Zn0.2Cd0.8S decorated g-C3N4 heterostructures for the photoreduction of CO2

Haiwei Guo

Jie Ding

Shipeng Wan

Yanan Wang

Zhong Qin

Publication type: Journal Article

Publication date: 2020-10-01

Elsevier

Journal: Applied Surface Science

Quartile SCImago

Quartile WOS

Impact factor: 6.7

ISSN: 01694332

DOI: 10.1016/j.apsusc.2020.146943

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Surfaces, Coatings and Films

General Chemistry

General Physics and Astronomy

Condensed Matter Physics

Surfaces and Interfaces

Abstract

• Zn 0.2 Cd 0.8 S/g-C 3 N 4 heterojunction was fabricated via a combined facile sonication and hydrothermal method. • The formed heterojunction improved the charge transfer and separation efficiency. • Improved photocatalytic activity can be achieved by the heterostructured material. • Zn 0.2 Cd 0.8 S/g-C 3 N 4 exhibited excellent stability and recyclability. • Reasons for high efficiency photocatalytic performance were discussed in detail. Herein, a type-Ⅱ heterojunction of Zn 0.2 Cd 0.8 S/g-C 3 N 4 (ZnCdS/CN) nanocomposites for CO 2 photoreduction to produce CH 3 OH is prepared via a combined simple sonication and hydrothermal method. After introducing g-C 3 N 4 into Zn 0.2 Cd 0.8 S, it is found that the amorphous powder g-C 3 N 4 is coated on the surface of Zn 0.2 Cd 0.8 S. The HRTEM and XPS results illustrate the heterostructure formation. The i-t curve, EIS and PL results suggest that the formed type-Ⅱ heterojunction improves the charge separation and transfer efficiency, and inhibits the recombination of photoinduced electron-hole pairs. Because of the improved photoelectric performance brought by the heterojunction, an optimized sample with g-C 3 N 4 to ZnCdS/CN mass ratio of 30% displays high CH 3 OH production rate of 11.5 ± 0.3 μmol·g −1 ·h −1 , which is 2.6 and 2.7 times greater than that of Zn 0.2 Cd 0.8 S solid solution (4.4 ± 0.2 μmol·g −1 ·h −1 ) and g-C 3 N 4 (4.2 ± 0.1 μmol·g −1 ·h −1 ), respectively. Moreover, under the protection of g-C 3 N 4 , the crystal structure and reaction activity of the composite are almost maintained even after four cycles, showing excellent stability. This work can provide guidance for synthesis of other heterojunction photocatalysts with excellent activity and stability.

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	2 4 6 8 10 12 14 16 18

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Guo H. et al. Highly efficient CH3OH production over Zn0.2Cd0.8S decorated g-C3N4 heterostructures for the photoreduction of CO2 // Applied Surface Science. 2020. Vol. 528. p. 146943.

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Guo H., Ding J., Wan S., Wang Y., Qin Z. Highly efficient CH3OH production over Zn0.2Cd0.8S decorated g-C3N4 heterostructures for the photoreduction of CO2 // Applied Surface Science. 2020. Vol. 528. p. 146943.

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TY - JOUR

DO - 10.1016/j.apsusc.2020.146943

UR - https://doi.org/10.1016/j.apsusc.2020.146943

TI - Highly efficient CH3OH production over Zn0.2Cd0.8S decorated g-C3N4 heterostructures for the photoreduction of CO2

T2 - Applied Surface Science

AU - Guo, Haiwei

AU - Ding, Jie

AU - Wan, Shipeng

AU - Wang, Yanan

AU - Qin, Zhong

PY - 2020

DA - 2020/10/01 00:00:00

PB - Elsevier

SP - 146943

VL - 528

SN - 0169-4332

ER -

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@article{2020_Guo,

author = {Haiwei Guo and Jie Ding and Shipeng Wan and Yanan Wang and Zhong Qin},

title = {Highly efficient CH3OH production over Zn0.2Cd0.8S decorated g-C3N4 heterostructures for the photoreduction of CO2},

journal = {Applied Surface Science},

year = {2020},

volume = {528},

publisher = {Elsevier},

month = {oct},

url = {https://doi.org/10.1016/j.apsusc.2020.146943},

pages = {146943},

doi = {10.1016/j.apsusc.2020.146943}

}

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Publisher

Elsevier

Journal

Applied Surface Science

Quartile SCImago

Quartile WOS

Impact factor

6.7

ISSN

01694332 (Print)