Novel visible light-induced g-C3N4/Bi2WO6 composite photocatalysts for efficient degradation of methyl orange

被引：777

作者：

Ge, Lei ^{[1
]}

Han, Changcun ^{[1
]}

Liu, Jing ^{[1
]}

机构：

[1] China Univ Petr, Coll Sci, Dept Mat Sci & Engn, 18 Fuxue Rd, Beijing 102249, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 108卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

g-C3N4; Bi2WO6; Photocatalysis; Functional; Semiconductors; GRAPHITIC CARBON NITRIDE; THIN-FILMS; BI2WO6; ABSORPTION; OXIDATION; PHENOL; G-C3N4;

D O I：

10.1016/j.apcatb.2011.08.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Novel visible light-induced g-C3N4/Bi2WO6 composite photocatalysts were synthesized by introducing polymeric g-C3N4. The obtained g-C3N4/Bi2WO6 products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, ultraviolet-visible diffuse reflection spectroscopy (DRS), and photoluminescence spectroscopy. The DRS results revealed that the g-C3N4/Bi2WO6 samples had a red shift and strong absorption in the visible light region. The photocatalytic oxidation ability of the novel photocatalyst was evaluated using methyl orange as a target pollutant. The photocatalysts exhibited a significantly enhanced photocatalytic performance in degrading methyl orange. The optimal g-C3N4 content for the photocatalytic activity of the heterojunction structures was determined. The synergic effect between g-C3N4 and Bi2WO6 was found to lead to an improved photo-generated carrier separation. Consequently, the photocatalytic performance of the g-C3N4/Bi2WO6 composites under visible light irradiation (lambda > 420 nm) was enhanced. The possible photocatalytic mechanism of the composites was proposed to guide the further improvement of their photocatalytic activity. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：100 / 107

页数：8

共 33 条

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