Z-scheme Ag3PO4/graphdiyne/g-C3N4 composites: Enhanced photocatalytic O2 generation benefiting from dual roles of graphdiyne

被引：73

作者：

Si, Hua-Yan ^{[1
]}

Mao, Chen-Jing ^{[1
]}

Zhou, Jin-Yuan ^{[2
,3
]}

Rong, Xian-Feng ^{[2
,3
]}

Deng, Qi-Xin ^{[1
]}

Chen, Shu-Lin ^{[5
]}

Zhao, Jin-Jin ^{[1
]}

Sun, Xiu-Guo ^{[1
]}

Shen, YingeMing ^{[1
]}

Feng, Wen-Jie ^{[4
]}

Gao, Peng ^{[5
]}

Zhang, Jin ^{[2
,3
]}

机构：

[1] Shijiazhuang Tiedao Univ, Sch Mat Sci & Engn, Hebei Prov Key Lab Traff Engn Mat, Shijiazhuang 050043, Hebei, Peoples R China

[2] Peking Univ, Coll Chem & Mol Engn, BNLMS, Ctr Nanochem Beijing Sci, Beijing 100871, Peoples R China

[3] Peking Univ, Coll Chem & Mol Engn, BNLMS, Engn Ctr Nanocarbons, Beijing 100871, Peoples R China

[4] Shijiazhuang Tiedao Univ, Dept Mech Engn, Shijiazhuang 050043, Hebei, Peoples R China

[5] Peking Univ, Sch Phys, Collaborat Innovat Ctr Quantum Matter, Electron Microscopy Lab,Int Ctr Quantum Mat, Beijing 100871, Peoples R China

来源：

CARBON | 2018年 / 132卷

基金：

中国国家自然科学基金;

关键词：

STATE Z-SCHEME; NANOCOMPOSITE PHOTOCATALYST; HYDROGEN-PRODUCTION; WATER; SEMICONDUCTOR; G-C3N4; PERFORMANCE; MECHANISM; SHEETS; HETEROSTRUCTURE;

D O I：

10.1016/j.carbon.2018.02.107

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：

Ag3PO4 nanoparticles are often considered to be a fascinating and efficient visible photocatalyst because of its high quantum efficiency and excellent activity of O-2 generation from water oxidation. However, the photo-corroded phenomenon and stability during the photocatalytic process reduce the photocatalytic activity. To overcome these disadvantages, strategies of combining Ag3PO4 with two-dimensional materials have been put forward to improve its stability and photocatalytic properties under visible-light irradiation. In this work, a novel Z-scheme Ag3PO4/graphdiyne/g-C3N4 nanocomposite was constructed via a simple electrostatic and pi-pi stacking interaction for the first time. Significantly, such Z-scheme nanostructures show highly oxygen evolution, and 753.1 mu mol g(-1) h(-1) of O-2 was produced with Ag3PO4/graphdiyne/g-C3N4, which was 12.2 times higher than that of Ag3PO4 nanoparticles. Graphdiyne with pi-conjugated structure of sp(-) and sp(2)-hybridized carbon atoms, can not only act as conductive electron mediator bridges to collect photogenerated electrons and boost the O-2 evolution kinetics, but also used as a promising substrate for stabilizing Ag3PO4 in the composite. (c) 2018 Elsevier Ltd. All rights reserved.

引用

页码：598 / 605

页数：8

共 52 条

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