化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (4) : 184-189. DOI: 10.19817/j.cnki.issn1006-3536.2024.04.016

科学研究

不同晶型TiO₂催化臭氧氧化的性能研究

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作者信息 +

Catalytic properties of different crystalline TiO₂ for ozone oxidation

Li Lianxin¹, Zhang Runze¹, Liu Zhipeng¹, Zhong Lian¹, Li Shiqian²

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文章历史 +

Received		Published
2023-01-09		2024-04-20
Issue Date	Revised Date
2024-05-07	2023-01-09

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摘要

采用溶胶-凝胶法,利用不同温度热处理制备不同晶体结构的TiO₂。以苯酚为目标污染物,研究了其催化臭氧氧化性能。结果表明,当催化剂质量相同时,锐钛矿型TiO₂因比表面积最大、表面羟基数量最多表现出最佳的臭氧催化活性;当对催化剂的表面积进行归一化时,表面羟基密度及活性氧含量随着TiO₂中金红石型含量的增大而增加,这表明金红石型的暴露面具有比锐钛矿型更高的内在活性。

Abstract

The nanocrystalline TiO₂ with different crystal structures were prepared by sol-gel method with heat treatment at various temperatures.The phenol was employed as the target pollutant to evaluate the catalytic ozonation activity of the samples.The results showed that when the catalysts were of the same mass,the anatase-rich TiO₂ materials exhibited the best ozone catalytic activity due to the largest specific surface area and the largest number of surface hydroxyls.When normalized with respect to the surface area of the catalysts,the surface hydroxyl density and reactive oxygen content increased with the increase of rutile type content of TiO₂,indicating that the exposed facets of rutile possessed an intrinsic higher activity than that of the anatase.

关键词

二氧化钛 / 金红石型 / 锐钛矿型 / 催化臭氧氧化 / 苯酚

Key words

TiO₂ / rutile / anatase / catalytic ozone oxidation / phenol

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不同晶型TiO₂催化臭氧氧化的性能研究[J]. 化工新型材料, 2024, 52(4): 184-189 DOI:10.19817/j.cnki.issn1006-3536.2024.04.016

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