化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (5) : 192-197. DOI: 10.19817/j.cnki.issn1006-3536.2024.05.035

科学研究

表面氟化锐钛矿与金红石/锐钛矿混合晶相TiO₂光催化性能对比研究

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Comparative study on the photocatalytic performance of surface-fluorinated anatase and anatase/rutile mixed phase TiO₂

Wang Zi¹, Chen Hongbiao², Wang Hui¹, Ma Juntao¹, Ge Suxiang²

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Received		Published
2024-01-01		2024-05-20
Issue Date	Revised Date
2024-05-28	2024-01-01

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摘要

以四氯化钛为钛源,通过改变氢氟酸(HF)用量、水热反应温度和时间调控TiO₂的晶相组成,并通过X射线衍射(XRD)、扫描电镜(SEM)、电子顺磁共振(ESR)、红外光谱(FT-IR)和紫外-可见光光谱(UV-Vis)等手段进行表征,以罗丹明B为模型污染物,对比研究了表面氟化锐钛矿TiO₂与金红石/锐钛矿混合晶相TiO₂光催化性能及反应机制。结果表明:混合晶相有利于电子和空穴共同参与光催化反应,从而更有利于提高光催化性能;表面氟化锐钛矿TiO₂能抑制电子的作用,导致其催化活性弱于混合相TiO₂。这为高活性TiO₂光催化剂的制备提供了一种新思路。

Abstract

The crystalline phase composition of titanium dioxide (TiO₂) was regulated by adjusting the content of HF,hydrothermal reaction temperature and time during the hydrothermal process by using titanium tetrachloride as the titanium source.The obtained samples were characterized by XRD,SEM,ESR,FT-IR,and UV-visible absorption spectrum.The photocatalytic performances and reaction mechanism of the surface-fluorinated anatase TiO₂ and the rutile/anatase mixed phase TiO₂ were compared with rhodamine B as a model pollutant.The results showed that the mixed crystalline phase was favorable for both the electron and hole participating in the photocatalytic reaction,and thus improved the photocatalytic performance.The surface-fluorinated anatase TiO₂ inhibited the electrons from participating in the photocatalytic reaction,resulting in its weaker catalytic activity than that of anatase/rutile mixed phase TiO₂,which provided a new idea for the preparation of highly active TiO₂ photocatalysts.

关键词

TiO₂ / 表面氟化 / 混合晶相 / 罗丹明B / 光催化

Key words

TiO₂ / surface-fluorinated / mixed phase / Rhodamine B / photocatalysis

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表面氟化锐钛矿与金红石/锐钛矿混合晶相TiO₂光催化性能对比研究[J]. 化工新型材料, 2024, 52(5): 192-197 DOI:10.19817/j.cnki.issn1006-3536.2024.05.035

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