摘要
采用改良后的水热法制备空心玻璃微球(HGM)/ZnIn2S4/α-Fe2O3漂浮型复合光催化剂。以HGM为载体,首先制备HGM/ZnIn2S4复合微球,然后利用自制的纳米棒状α-Fe2O3进一步改性,得到HGM/ZnIn2S4/α-Fe2O3漂浮型复合光催化剂。以六价铬(Cr6+)为目标污染物,研究了α-Fe2O3含量、催化剂投加量和原液pH值对复合催化剂光催化活性的影响。结果表明:纳米棒状α-Fe2O3与六方相型ZnIn2S4形成异质结构并均匀负载在HGM表面,形成HGM/ZnIn2S4/α-Fe2O3复合光催化剂,与α-Fe2O3粉体和HGM/ZnIn2S4复合微球相比,HGM/ZnIn2S4/α-Fe2O3漂浮型复合光催化剂的催化性能显著提高,且再循环后仍具有良好的光催化效率,并提出了HGM/ZnIn2S4/α-Fe2O3的增强型光催化机制。
A floating composite photocatalyst of hollow glass microspheres(HGM)/ZnIn2S4/α-Fe2O3 was prepared by a modified hydrothermal method.The HGM/ZnIn2S4 composite was firstly prepared with HGM as a carrier,and then further modified with nanorod-shapedα-Fe2O3 to obtain the floating composite photocatalysts of HGM/ZnIn2 S4/α-Fe2O3.The effects ofα-Fe2O3 content,photocatalysts addition and solution pH value on the photocatalytic activity of the composite photocatalysts for the degradation of hexavalent chromium(Cr6+)were investigated.The results show thatα-Fe2O3 and hexagonal ZnIn2S4 heterogeneous structure are formed,and the composite photocatalyst is uniformly loaded on the surface of HGM.Compared toα-Fe2O3 powder and HGM/ZnIn2S4 composite microspheres,the photocatalytic performance of HGM/ZnIn2S4/α-Fe2O3 is improved.The prepared composite photocatalyst still has a good photocatalytic efficiency after several recycling.In addition,the synthesis mechanism of HGM/ZnIn2S4/α-Fe2O3 and its enhanced photocatalytic mechanism were also discussed.
作者
韩煦
王雷磊
王磊
王旭东
赵德强
HAN Xu;WANG Leilei;WANG Lei;WANG Xudong;ZHAO Deqiang(Xi′an University of Architecture and Technology,Department of Environmental and Municipal Engineering,Xi'an 710055,China;Research Institute of Membrane Separation Technology of Shaanxi Province,Xi'an 710055,China;Key Laboratory of Membrane Separation of Shaanxi Province,Xi'an 710055,China;Shaanxi Key Laboratory of Environment Engineering,Xi'an 710055,China;School of Rive and Ocean Engineering,Chongqing Jiaotong University,Laboratory of Urban Water and Environment Monitoring and Control,Chongqing 400074,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2020年第7期1097-1106,共10页
Journal of The Chinese Ceramic Society
基金
陕西省重点科技创新团队计划(2017KCT-19-01)
陕西省重点产业链(群)项目(2017ZDCXL-GY-07-03)
陕西省技术创新引导专项(2018HJCG-18)。
关键词
水热法
α-三氧化二铁
硫铟锌
异质结
漂浮型负载
空心玻璃微球
hydrothermal method
α-iron oxide
indium sulfur zinc
heterojunction
floating load
hollow glass microsphere
