期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 8, 页码 6478-6485出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b00575
关键词
Carbon nitride; Hydrogen peroxide; Photocatalysis; Sunlight; Electrical conductivity
资金
- Precursory Research for Embryonic Science and Technology (PRESTO) from Japan Science and Technology Agency (JST) [JPMJPR1442]
Generating hydrogen peroxide (H2O2) from water and dioxygen (O-2) by photocatalysis is one ideal artificial photosynthesis for solar fuel production. Several early reported powdered photocatalysts, however, produce small amounts of H2O2 (<0.1 mM). We prepared graphitic carbon nitride (g-C3N4) doped with mellitic triimide (MTI) units by thermal condensation of melem and mellitic acid anhydride. The g-C3N4/MTI photocatalyst, when irradiated by visible light (lambda > 420 nm) in pure water with O-2, successfully produces millimolar levels of H2O2 via water oxidation by valence band holes and selective two-electron reduction of O-2 by conduction band electrons. The incorporation of triply branched MTI units creates a condensed melem layer. This facilitates efficient intra- and interlayer transfer of photogenerated charge carriers and shows high electrical conductivity. The solar-to-chemical conversion efficiency for H2O2 production on the catalyst is 0.18%, which is higher than that of natural photosynthesis (similar to 0.1%) and similar to the highest values obtained by semiconductor water-splitting catalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据