文章摘要
吴香,徐龙君.BiVO4/MnO2复合催化氧化剂的制备及性能[J].精细化工,2019,36(9):
BiVO4/MnO2复合催化氧化剂的制备及性能
Preparation and Properties of Composite Catalyst-oxidizer BiVO4/MnO2
投稿时间:2018-12-26  修订日期:2019-05-09
DOI:
中文关键词: 光催化氧化剂  BiVO4/MnO2  催化  降解  废物处理
英文关键词: photocatalyst-oxidizer  BiVO4/MnO2  catalysis  degradation  waste treatment
基金项目:重庆市基础与前沿研究计划重点项目
作者单位E-mail
吴香 重庆大学煤矿灾害动力学与控制国家重点实验室 1301147423@qq.com 
徐龙君 重庆大学煤矿灾害动力学与控制国家重点实验室 xulj@cqu.edu.cn 
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中文摘要:
      采用一步水热法成功制备了BiVO4/MnO2复合光催化氧化剂,通过XRD、FTIR、SEM、EDS、XPS和UV-vis DRS对其结构进行了表征,并以罗丹明B溶液作为目标降解物考察了其光催化氧化活性。结果表明,复合物中形成了多孔结构 ,BiVO4的晶体结构未发生改变,呈现出片状组合的叶状廓形,BiVO4-MnO2的带隙小于BiVO4;当MnO2与BiVO4的质量比为10%时,光催化活性最好;RhB溶液pH为5时,BiVO4//MnO2光照20 min 对其降解率为98.4%,远高于纯BiVO4(13.1%)。由于MnO2具有氧化性,BiVO4-MnO2复合材料可做光催化-氧化剂。
英文摘要:
      BiVO4/MnO2 composite catalyst-oxidizer are successfully prepared by one-step hydrothermal method, and its structure and properties were analyzed by XRD, FTIR, SEM, EDS and UV-vis DRS. The catalytic-oxidative activities of the samples were evaluated by the degradation of Rhodamine B(RhB). The results exhibited that the composite formed the porous structure, the crystal structure of BiVO4 in BiVO4/MnO2 composite did not change, and shows a leaf-like profile with flaky combination’smorphology. The band gap of BiVO4/MnO2 is smaller than that of BiVO4. When the mass ratio of BiVO4/MnO2 was 10%, the composite showed the highest photocatalytic-oxidative activity. The degradation rate of RhB reached 98.4% at 20 minutes as the pH of solution was 5, and it is much higher than that of pure BiVO4(13.1%). Due to the oxidizing properties of MnO2, BiVO4-MnO2 composites can be used as photocatalytic-oxidants.
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