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孔雀石绿在镁铝水滑石负载纳米氧化锌上的快速光降解
闫瑞强1, 刘贵花1, 王庆丰1, 刘卫2, 宋春林3
1.台州大学材料工程系, 台州 318000;2.西南大学材料与能源学部, 重庆 400715;3.中国科学技术大学材料科学与工程系, 合肥 230026
摘要:
用共沉淀法制备Mg-Al水滑石纳米粉,ZnO纳米颗粒均相地覆盖在Mg-Al水滑石表面. 在500 ℃煅烧4 h后,采用XRD和SEM分析晶体结构和形貌. 研究表明在Mg-Al水滑石表面成功地制备了纳米ZnO. 所获得的纳米ZnO光催化剂对孔雀石绿表现出高的光催化降解性能. 归因于ZnO表面的高光催化活性以及Mg-Al水滑石较好的吸附性能,其中Mg-Al水滑石层片结构起了重要作用.
关键词:  ZnO  光催化  降解
DOI:10.1063/1674-0068/29/cjcp1505104
分类号:
基金项目:The work is supported by the Key Disciplines of Ap-plied Chemistry of Zhejiang Province (Taizhou Univer-sity), the National Natural Science Foundation of China (No.51403149), and the Fundamental Research Funds for the Central Universities, China (No.SWU113045 and No.XDJK2015C002).
Fast Photodegradation of Malachite Green using Nano-ZnO on Ceramic MgAl Carbonate Layered Double Hydroxides Support
Rui-qiang Yan1, Gui-hua Liu1, Qing-feng Wang1, Wei Liu2, Chun-lin Song3
1.Department of Materials Engineering, Taizhou University, Taizhou 318000, China;2.CAS Key Lab Mat Energy Convers, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China;3.Faculty of Materials and Energy, Southwest University, Chongqing 400715, China
Abstract:
The nanopowders of Mg-Al carbonate layered double hydroxides (MgAl-LDH) were prepared via coprecipitation process. ZnO nanoparticles were homogeneously coated on the ceramic MgAl-LDH surface. After calcination at 500 ℃ for 4 h, X-ray diffraction and scanning electron microscopy were employed to investigate the crystal structure and morphology, respectively. It was demonstrated that ZnO nanoparticles were successfully prepared on ceramic MgAl-LDH support. The obtained nano-ZnO photocatalyst showed a high pho-tocatalytic degradation of malachite green. The enhanced photocatalytic property can be attributed to both high photocatalytic activity of ZnO and good adsorption behavior of ceramic MgAl-LDH, in which the aky structure of MgAl-LDH plays an important role.
Key words:  Degradation  Photocatalyst  ZnO  Coprecipitation
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