Research on the preparation of Sm@TiO2-SiO2 and its photocatalytic degradation of Rhodamine B

doi:10.11894/1005-829x.2019.39(4).070

Abstract

Abstract: TiO₂-SiO₂ doped with rare earth ions has been prepared by sol-gel method using Sm(NO₃)₃·6H₂O as raw material,and characterized by means of UV-Vis,XRD,FTIR,PL and SEM. The results show that the inlay of Sm facilitates the efficient separation of photogenerated electrons-hole,as well as improves the quantum efficiency. The catalytic degradation capability of catalysts doped with different mass percentages of Sm for Rhodamine B under xenon lamp irradiation is investigated. Then,compared to undoped catalysts,the catalysts doped with Sm has inhibiting effect on α-R phase transformation,which is beneficial to the formation of small crystalgrain anatase. The degradation rate of Rhodamine B can reach 99%,when 2%Sm@TiO₂-SiO₂ catalyst is used under irradiation for 3 hours.

Key words: photocatalysis, TiO₂-SiO₂, rare earth, Sm@TiO₂-SiO₂

摘要： 以硝酸钐为原料，用溶胶-凝胶法制备了稀土离子掺杂的TiO₂-SiO₂催化剂，并用UV-Vis、XRD、FTIR、PL、SEM进行表征。结果表明：钐（Sm）的嵌入促进了光生电子-空穴的有效分离，提高了量子效率。在氙灯照射下，考察掺杂不同质量钐的催化剂对罗丹明B的催化降解性能，相比于未掺杂催化剂，掺杂钐的催化剂对α-R相变有抑制作用，有利于形成小晶粒锐钛矿。采用2% Sm@TiO₂-SiO₂催化剂，照射3 h时，对罗丹明B的降解率可达99%。

关键词: 光催化, TiO₂-SiO₂, 稀土, Sm@TiO₂-SiO₂

CLC Number:

X703
O643.36

Zi Yue, Li Huipeng, Zhao Hua. Research on the preparation of Sm@TiO₂-SiO₂ and its photocatalytic degradation of Rhodamine B[J]. INDUSTRIAL WATER TREATMENT, 2019, 39(4): 70-73.

訾悦, 李会鹏, 赵华. Sm@TiO₂-SiO₂的制备及其光催化降解罗丹明B的研究[J]. 工业水处理, 2019, 39(4): 70-73.

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URL: https://www.iwt.cn/EN/10.11894/1005-829x.2019.39(4).070

https://www.iwt.cn/EN/Y2019/V39/I4/70

References 12

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Research on the preparation of Sm@TiO₂-SiO₂ and its photocatalytic degradation of Rhodamine B

Sm@TiO₂-SiO₂的制备及其光催化降解罗丹明B的研究

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