DOI: 10.1016/j.jcou.2014.02.002
Scopus记录号: 2-s2.0-84897440435
论文题名: Photocatalytic reduction of CO2 over a hybrid photocatalyst composed of WO3 and graphitic carbon nitride (g-C3N 4) under visible light
作者: Ohno T. ; Murakami N. ; Koyanagi T. ; Yang Y.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2014
卷: 6 起始页码: 17
结束页码: 25
语种: 英语
英文关键词: Graphtec carbon nitride
; Hybrid photocatalyst
; Reduction of carbon dioxide
; Tungsten oxide
; Z-scheme reaction
Scopus关键词: Carbon dioxide
; Complexation
; Loading
; Metal nanoparticles
; Methane
; Methanol fuels
; Nitrides
; Oxidation
; Photoacoustic spectroscopy
; Photocatalysis
; Graphitic carbon nitrides
; High photocatalytic activities
; Hybrid photocatalysts
; Photocatalytic activities
; Photocatalytic reduction of co
; Tungsten oxide
; Visible-light irradiation
; Z-scheme reaction
; Photocatalysts
英文摘要: Graphitic carbon nitride (g-C3N4) has attracted much attention as a metal-free semiconductor having visible light absorption and relatively high chemical stability. g-C3N4 can reduce CO2 to organic fuels such as methanol (CH3OH), formic acid (HCO2H), and methane (CH4) under visible light irradiation. However, oxidation potential of g-C3N4 is not enough for water oxidation. Therefore, we focused on hybridization of g-C 3N4 and tungsten(VI) oxide (WO3) which has high oxidation potential for water oxidation. In this study, we examined CO 2 reduction by composite photocatalyst of g-C3N 4 and WO3, which was prepared by three methods (mixture using an agate mortar, impregnation and planetary mill). As a result, composite photocatalyst prepared with planetary mill showed the highest photocatalytic activity. Photodeposition of silver or gold nanoparticles only on g-C 3N4 of the hybrid photocatalyst induced an increase in CH3OH because the loaded metal nanoparticles play an important role in multi-electron reduction of CO2. Photocatalytic activity of the Au-loaded hybrid photocatalyst composed of g-C3N4 and WO3 was 1.7-times higher than that of the hybrid photocatalyst without Au loading. In addition, we investigated photocatalytic reaction mechanism of composite photocatalyst by double-beam photoacoustic spectroscopy. This result revealed Z-scheme reaction proceeds in the composite photocatalyst to maintain high oxidation ability of WO3 and high reduction ability of g-C3N4, resulting in high photocatalytic activity. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53012
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
Recommended Citation:
Ohno T.,Murakami N.,Koyanagi T.,et al. Photocatalytic reduction of CO2 over a hybrid photocatalyst composed of WO3 and graphitic carbon nitride (g-C3N 4) under visible light[J]. Journal of CO2 Utilization,2014-01-01,6