化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (4) : 122-126. DOI: 10.19817/j.cnki.issn1006-3536.2021.04.027

新材料与新技术

氧化铁/还原氧化石墨烯/钨酸铋复合光催化剂的光催化性能研究

付璐, 刘顺强, 张浩, 钱清华, 张萍, 杜岗

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Study on property of Fe₂O₃-rGO-Bi₂WO₆ composite photocatalyst

Fu Lu, Liu Shunqiang, Zhang Hao, Qian Qinghua, Zhang Ping, Du Gang

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Received
2020-05-08
Issue Date	Revised Date
2021-05-07	2020-05-08

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摘要

采用一步水热法成功制备出了具有完整微球形貌的氧化铁/还原氧化石墨烯/钨酸铋(Fe₂O₃-rGO-Bi₂WO₆)异质结复合光催化剂。将不同光催化剂复合、离子掺杂、氧化石墨烯(GO)复合这3种钨酸铋(Bi₂WO₆)催化性能改性方法有效地结合在一起。通过X射线衍射仪(XRD)、扫描电子显微镜(FE-SEM)、紫外可见分光光度计(UV-Vis)等手段系统地研究了不同Fe/Bi比值下Fe₂O₃-rGO-Bi₂WO₆样品形貌、晶体结构和可见光光催化性能及其变化规律。结果表明:在石墨烯、异质结以及少量Fe³⁺离子掺杂的协同作用下,随着Fe/Bi比值从0到1,Fe₂O₃-rGO-Bi₂WO₆样品的吸收波长出现先红移再转变为蓝移的现象,禁带宽度相应的先减小后增大,光催化降解速度先增快后逐渐减慢。

Abstract

Fe₂O₃-reduced graphene oxide(rGO)-Bi₂WO₆ (F-r-B)heterojunction composite photocatalyst with complete microspherical morphology was successfully synthesized by one-step hydrothermal method.The effective combination of three modification methods for BWO catalytic performance,such as combination of different photocatalysts,ion doping and GO composite,was combined effectively together.The morphology,crystal structure,visible-light photocatalytic performance and their evolution trend of F-r-B samples with the different Fe/Bi values were systematically studied using X-ray diffractometer (XRD),scanning electron microscope (FE-ESEM),UV-visible spectrophotometer (UV-Vis) and other analytical instruments.On account of the synergistic effect of rGO,heterojunction and minor Fe³⁺ ion doping,the absorption wavelength of F-r-B samples firstly undergone a red shift and then changed to a blue shift,the band gap correspondingly decreased first and then increased,and its visible light photocatalytic activity first increased and then decreased.

关键词

氧化石墨烯 / 复合光催化剂 / 离子掺杂 / 可见光光催化活性

Key words

graphene oxide / composite photocatalyst / ion doping / visible-light photocatalytic performance

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氧化铁/还原氧化石墨烯/钨酸铋复合光催化剂的光催化性能研究[J]. 化工新型材料, 2021, 49(4): 122-126 DOI:10.19817/j.cnki.issn1006-3536.2021.04.027

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