Synthesis and photocatalytic activity of RGO-BiOCl/Bi2WO6 heterojunction photocatalyst by microwave etching method

doi:10.11949/j.issn.0438-1157.20170765

Abstract

Abstract:

The oxidized graphite was prepared by modified Hummers method for oxidation treatment of natural graphite. BiOCl/Bi₂WO₆ catalyst was loaded on RGO by microwave and chemical etching with Bi(NO₃)₃·5H₂O, KCl and Na₂WO₄. The morphology and structure of as-synthesized products were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), Brunauer-Emmett-Teller (BET), UV-visible diffuse reflectance spectra (UV-Vis DRS) and transmission electron microscope(TEM). Rhodamine B solution was used as target degradation to investigate the photocatalytic performance of catalyst. The results illustrated that RGO:RGO-BiOCl(mass ratio) was 2%, Bi₂WO₆:RGO-BiOCl/Bi₂WO₆ (molar ratio) was 50%, and the degradation rate reached as high as 94.6%, compared to pure BiOCl.

Key words: graphene oxide, BiOCl/Bi₂WO₆, heterojunction, photochemistry, degradation, catalysis

摘要：

采用改进的Hummers法制备氧化石墨烯，以Bi（NO₃）₃·5H₂O、KCl、Na₂WO₄为原料，采用微波蚀刻法在其基础上负载BiOCl/Bi₂WO₆。通过X射线衍射（XRD）、扫描电镜（SEM）、比表面积测定仪（BET）、紫外-可见漫反射（UV-Vis）及透射电镜（TEM）等对所制备的催化剂进行表征。以RhB作为目标降解物，考察其光催化性能。结果表明，当RGO：RGO-BiOCl（质量比）为2%、Bi₂WO₆：RGO-BiOCl/Bi₂WO₆（摩尔比）为50%，降解率可达94.6%，远高于纯BiOCl。

关键词: 氧化石墨烯, BiOCl/Bi₂WO₆, 异质结, 光化学, 降解, 催化

CLC Number:

O643

CHEN Ying, HAN Xingyue, LIANG Hongbao, LIANG Yuning, GAO Yanhua. Synthesis and photocatalytic activity of RGO-BiOCl/Bi₂WO₆ heterojunction photocatalyst by microwave etching method[J]. CIESC Journal, 2018, 69(4): 1758-1764.

陈颖, 韩星月, 梁宏宝, 梁宇宁, 高彦华. 微波蚀刻法制备RGO-BiOCl/Bi₂WO₆异质结型催化剂及其催化性能[J]. 化工学报, 2018, 69(4): 1758-1764.

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Synthesis and photocatalytic activity of RGO-BiOCl/Bi₂WO₆ heterojunction photocatalyst by microwave etching method

微波蚀刻法制备RGO-BiOCl/Bi₂WO₆异质结型催化剂及其催化性能

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