Mesostructured CeO2/g-C3N4 nanocomposites: Remarkably enhanced photocatalytic activity for CO2 reduction by mutual component activations

被引：374

作者：

Li, Mengli ^{[1
]}

Zhang, Lingxia ^{[1
]}

Wu, Meiying ^{[1
]}

Du, Yanyan ^{[1
]}

Fan, Xiangqian ^{[1
]}

Wang, Min ^{[1
]}

Zhang, Linlin ^{[1
]}

Kong, Qinglu ^{[1
]}

Shi, Jianlin ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Ding Xi Rd, Shanghai 200050, Peoples R China

来源：

NANO ENERGY | 2016年 / 19卷

基金：

中国国家自然科学基金;

关键词：

Nanocomposite; CO2; photoreduction; CeO2; Carbon nitride; GRAPHITIC CARBON NITRIDE; HYDROGEN EVOLUTION; DOPED CEO2; EFFICIENT PHOTOCATALYST; GRAPHENE OXIDE; CATALYSTS; PHOTOREDUCTION; OXIDATION; NANOSHEETS; G-C3N4;

D O I：

10.1016/j.nanoen.2015.11.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

CO2 is highly stable and therefore extremely difficult to be reduced at room temperature. Herein, mesostructured CeO2/graphite carbon nitride (m-CeO2/g-C3N4) was designed and synthesized through a hard-template route. The heterogeneous nanocomposites showed greatly enhanced response to solar light, promoted charge carrier separation and transfer efficiency. Consequently, their CO2 photoreduction performance has been remarkably enhanced. Maximum CO and CH4 yields of 0.590 and 0.694 mu mol, respectively, have been obtained from the CO2 reduction after one hour irradiation at room temperature on 50 mg nanocomposite photo catalyst. Different from common g-C3N4-based composites in which the additional component only plays a role of electron sink in electron-hole separation, a synergetic effect of mutual activations between the two components is proposed, which is featured with g-C3N4 activation due to significantly promoted separation of photo -generated carriers under Xenon lamp irradiation, and CeO2 activation via the reduction of Ce4+ to Ce3+ by the trapped electrons. (C) 2015 Published by Elsevier Ltd.

引用

页码：145 / 155

页数：11

共 57 条

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