摘要
Rational design and construction of step-scheme(S-scheme)photocatalyst has received much attention in the field of CO_(2) reduction because of its great potential to solve the current energy and environmental crises.In this study,a series of plate-like WO_(3)/CuBi_(2)O_(4)(WO/CBO)photocatalysts were synthesized.The CO and CH4 yields over optimal composite reached 1,115.8 and 67.2μmol/m2 after 9 h visible light illumination(λ>400 nm),which was higher than those of two pure catalysts in CO_(2) photoreduction.The product yields slightly decreased in the 7th cycling.Besides,the staggered band structure of heterojunction was characterized by diffuse reflectance spectroscopy(DRS)and valence band-X-ray photoelectron spectroscopy(VB-XPS),and a S-scheme charge transfer mechanism was verified by detecting electron spin resonance(ESR)and XPS result about surface composition of WO/CBO catalyst in dark or light.This work may be useful for rational designing of S-scheme photocatalyst and provides some illuminating insights into the S-scheme transfer mechanism.
基金
supported by the financial supports of National Natural Science Foundation of China(Nos.51802082 and 51903073)
Natural Science Foundation of Henan Province(No.212300410221)
Program for Science&Technology Innovation Talents in Universities of Henan Province(No.21HATIT016)
Key Scientific Research Project of Colleges and Universities in Henan Province(Nos.21A430030 and 20A150017)
Key Scientific and Technological Project of Henan Province(Nos.222102320100,212102210473,and 212102210178)
National College Student Innovantion and Entrepreneurship Training(No.202110467024)
“Climbing”Project of Henan Institute of Science and Technology(No.2018CG04).
