Applied Catalysis B: Environmental, volume 263, pages 118314

Efficient Z-scheme photocatalysts of ultrathin g-C3N4-wrapped Au/TiO2-nanocrystals for enhanced visible-light-driven conversion of CO2 with H2O

Chujun Wang 1
Yilong Zhao 1
Hui Xu 2
Yifei Li 1
Yuechang Wei 1
Jian Liu 1
Zhen Zhao 1
1
 
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Chang Ping, Beijing 102249, PR China
Publication typeJournal Article
Publication date2020-04-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor22.1
ISSN09263373, 18733883
Catalysis
Process Chemistry and Technology
General Environmental Science
Abstract
Z-scheme-type photocatalysts with two photochemical systems of graphic-C3N4 (g-C3N4) and anatase TiO2 (A-TiO2) nanocrystals combined with Au nanoparticles (NPs) [(Au/A-TiO2)@g-C3N4] were successfully fabricated. The surface heterojunction between coexposed {001} and {101} facets in A-TiO2 nanocrystals improves separation efficiency of photoelectrons and holes. Supported Au NPs gather and transfer the stimulated electrons originated from A-TiO2 to g-C3N4. Wrapped g-C3N4 nanosheets can not only trap the photoelectrons, but also its surface π bond can improve adsorption capabilities for CO2. (Au/A-TiO2)@g-C3N4 catalysts with enriched surface photoelectrons and CO2 exhibit high photocatalytic activity for visible-light-driven conversion of CO2, i.e., the formation rates of CH4 and CO over (Au/A-TiO2)@C3N4-5 catalyst are 37.4 and 21.7 μmol g−1 h−1, respectively. The selectivity for CO2 reduction is higher than 99%, and the selectivity of CH4 product increases from 1.4% to 63.3%. The innovation of Z-scheme-type photocatalysts is expected to provide new inspiration for artificial simulation photosynthesis.

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Wang C. et al. Efficient Z-scheme photocatalysts of ultrathin g-C3N4-wrapped Au/TiO2-nanocrystals for enhanced visible-light-driven conversion of CO2 with H2O // Applied Catalysis B: Environmental. 2020. Vol. 263. p. 118314.
GOST all authors (up to 50) Copy
Wang C., Zhao Y., Xu H., Li Y., Wei Y., Liu J., Zhao Z. Efficient Z-scheme photocatalysts of ultrathin g-C3N4-wrapped Au/TiO2-nanocrystals for enhanced visible-light-driven conversion of CO2 with H2O // Applied Catalysis B: Environmental. 2020. Vol. 263. p. 118314.
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RIS Copy
TY - JOUR
DO - 10.1016/j.apcatb.2019.118314
UR - https://doi.org/10.1016/j.apcatb.2019.118314
TI - Efficient Z-scheme photocatalysts of ultrathin g-C3N4-wrapped Au/TiO2-nanocrystals for enhanced visible-light-driven conversion of CO2 with H2O
T2 - Applied Catalysis B: Environmental
AU - Wang, Chujun
AU - Zhao, Yilong
AU - Xu, Hui
AU - Li, Yifei
AU - Wei, Yuechang
AU - Liu, Jian
AU - Zhao, Zhen
PY - 2020
DA - 2020/04/01 00:00:00
PB - Elsevier
SP - 118314
VL - 263
SN - 0926-3373
SN - 1873-3883
ER -
BibTex
Cite this
BibTex Copy
@article{2020_Wang,
author = {Chujun Wang and Yilong Zhao and Hui Xu and Yifei Li and Yuechang Wei and Jian Liu and Zhen Zhao},
title = {Efficient Z-scheme photocatalysts of ultrathin g-C3N4-wrapped Au/TiO2-nanocrystals for enhanced visible-light-driven conversion of CO2 with H2O},
journal = {Applied Catalysis B: Environmental},
year = {2020},
volume = {263},
publisher = {Elsevier},
month = {apr},
url = {https://doi.org/10.1016/j.apcatb.2019.118314},
pages = {118314},
doi = {10.1016/j.apcatb.2019.118314}
}
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