化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (8) : 153-157.

科学研究

磁性黏土基TiO₂复合材料的制备及其光催化性能

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Fabrication and photocatalytic property of magnetic clay-based TiO₂ composite

Wang Lu¹, Zhu Beibei¹, Li Rong², Li Ya²

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Received
2018-03-22
Issue Date	Revised Date
2019-09-04	2018-03-22

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摘要

采用溶剂热法将酸改性凹凸棒黏土(AATP)和Fe₃O₄纳米粒子复合,制备出磁性凹凸棒黏土复合载体(MATP);采用水热法在MATP上负载活性组分TiO₂,制成新型磁性复合光催化剂(TiO₂/MATP)。采用X射线衍射(XRD)、透射电镜(TEM)、X射线能谱(EDS)、比表面积分析和振动磁强计(VSM)等对样品进行了表征。结果表明,TiO₂/MATP复合材料包含Fe₃O₄磁性组分和锐钛矿相TiO₂活性组分,保持了凹凸棒黏土的纳米棒状和多孔结构,BET比表面积为130.88m²/g,饱和磁化强度为14.40emu/g。对罗丹明B染料降解实验表明,TiO₂/MATP复合材料具有较高暗吸附特征和光催化活性,20min暗吸附率可达39.0%;在紫外光照射下,50min降解率达到97.2%。

Abstract

The magnetically composite support Fe₃O₄ nanoparticles/attapulgite (MATP) was prepared by solvothermal method using acid activated attapulgite (AATP) as starting material.A new magnetic photocatalyst (TiO₂/MATP) was obtained by hydrothermal method with immobilizing the active component TiO₂ onto MATP.The as-prepared sample was characterized by XRD,Raman,TEM,EDS,specific surface area analyzer and VSM.Results showed that the photocatalyst contained Fe₃O₄ and anatase TiO₂.Meanwhile,TiO₂/MATP retain the nanorod and porous structure,which specific surface area was 130.88m²/g and magnetization was 14.40emu/g.Further study of Rhodamin B degradation demonstrated that TiO₂/MATP had excellent dark adsorptive capability as well as phtocatalytic activity.The adsorption rate of TiO₂/MATP for Rhodamine B can attain to 39.0% within 20min,and the degradation rate of Rhodamin B can reach 97.2% with in 50min under the ultraviolet light irradiation.

关键词

磁性 / 凹凸棒黏土 / 二氧化钛 / 光催化

Key words

magnetism / attapulgite / TiO₂ / photocatalysis

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磁性黏土基TiO₂复合材料的制备及其光催化性能[J]. 化工新型材料, 2019, 47(8): 153-157 DOI:

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