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剥离蒙脱石表面原位构建Bi2O3/Bi2SiO5异质结及其光催化活性

NIE Tao,YU Jing,CHEN Ben, WANG Rui,HE Beibei, JIN Jun,WANG Huanwen,GONG Yansheng

Journal of the Chinese Ceramic Society（2022）

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Abstract
采用一步法,在剥离蒙脱石表面原位构建了Bi2O3/Bi2SiO5异质结,系统研究了其物相结构、微观形貌和光学特征.制备过程中,剥离蒙脱石除作为Bi2O3/Bi2SiO5异质结生长的骨架,还可以作为硅源得到Bi2SiO5.结果表明:与纯α-Bi2O3相比,在模拟太阳光的照射下,Bi2O3/Bi2SiO5异质结表现出对罗丹明B有优良降解性能,这主要是由于Bi2O3与Bi2SiO5之间形成的p-n结以及高的比表面积所引起的.此外,还提出了光催化反应机理.本工作提供了一种构建低成本污染物降解催化剂的新方法,拓展了蒙脱石的新应用.
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Key words
exfoliated montmorillonite,heterojunctions,in-situ synthesis,dye pollutant degradation
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