Synthesis of a g-C3N4-Cu2O heterojunction with enhanced visible light photocatalytic activity by PEG

被引：56

作者：

Li, Dongya ^{[1
]}

Zuo, Shiyu ^{[1
]}

Xu, Haiming ^{[2
]}

Zan, Jie ^{[1
]}

Sun, Lei ^{[1
]}

Han, Donghui ^{[3
]}

Liao, Wei ^{[1
]}

Zhang, Binyang ^{[1
]}

Xia, Dongsheng ^{[1
]}

机构：

[1] Wuhan Text Univ, Sch Environm Engn, Wuhan 430073, Peoples R China

[2] Minist Educ, Engn Res Ctr Clean Prod Text Dyeing & Printing, Wuhan 430073, Peoples R China

[3] Minist Environm Protect PRC, South China Inst Environm Sci, Guangzhou 510655, Guangdong, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2018年 / 531卷

关键词：

Photocatalysts; g-C3N4-Cu2O; Heterogeneous catalysis; Heterojunction; PEG-400; DEGRADATION; NANOCOMPOSITES; COMPOSITE; EVOLUTION; CATALYST; FACILE;

D O I：

10.1016/j.jcis.2018.07.018

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：

A g-C3N4-Cu2O was successfully synthesized in the presence of PEG-400 surfactant via a hydrothermal method and high-temperature calcination method. Based on the results of TEM, XPS, EPR, and other techniques, it was verified that a heterojunction was formed. The synthesized g-C3N4-Cu2O show excellent photocatalytic activity and stability was confirmed through cycling experiments, XRD and XPS. At a suitable addition amount, the value of band gap of g-C3N4-Cu2O is reduced to 1.87 eV, the PL intensity decreases effectively, the specific surface area is increased to 12.8114 m(2)/g, and the photocatalytic degradation rate is increased to 94%. Adding the surfactant PEG-400 in the precursor solutions leads to a reduction in the crystallite size, which can improve the morphology and specific surface area to form abundant heterojunction interfaces as channels for photo-generated carrier separation, and improve its light utilization and quantum efficiency. (C) 2018 Elsevier Inc. All rights reserved.

引用

页码：28 / 36

页数：9

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