Photoelectrochemical study on charge separation mechanisms of Bi2WO6 quantum dots decorated g-C3N4

被引：41

作者：

Hao, Hongjuan ^{[1
]}

Lu, Dingze ^{[1
]}

Wang, Qiuping ^{[1
]}

机构：

[1] Xian Polytech Univ, Sch Sci, Xian 710048, Shaanxi, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2018年 / 43卷 / 18期

基金：

中国国家自然科学基金;

关键词：

g-C3N4; Bi2WO6; Z-system; Charge separation; PEC water splitting; PHOTOCATALYTIC HYDROGEN EVOLUTION; CARBON NITRIDE; COMPOSITE PHOTOCATALYST; H-2; PRODUCTION; DOPED G-C3N4; WATER; HETEROJUNCTION; PHOTOREDUCTION; MOS2; CO2;

D O I：

10.1016/j.ijhydene.2018.03.192

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：

In this paper, the Bi2WO6 quantum dots (QDs) decorated g-C3N4 nanoplates were successfully synthesized via a one-step hydrothermal method. The morphology of the Bi2WO6 could be tuned from regular nanoplates to quantum dots. Remarkably, the Bi2WO6 QDs coupled with g-C3N4 not only prevented the aggregation, but also decreased the size of Bi2WO6 QDs about 3.5 nm. Meanwhile, the charge separation mechanisms of Bi2WO6 QDs/g-C3N4 photocatalyst were investigated by electrochemical impedance spectra, Mott-Schottky and linear voltammetry scans. As a result, the photoelectrochemical (PEC) experiments provided forceful evidence for the charge separation mechanism of the Bi2WO6 QDs/g-C3N4 Z-scheme. The Z-scheme system not only accelerated the separation efficiency of charge, but also improved the ability of PEC water splitting at measured 1.23 V vs. RHE. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：8824 / 8834

页数：11

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