化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (8) : 136-139. DOI: 10.19817/j.cnki.issn 1006-3536.2021.08.028

新材料与新技术

Zn掺杂混晶TiO₂的制备及光催化性能研究

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Preparation and photocatalytic property of Zn-doped mixed crystal TiO₂

Zhu Xiaodong¹, Wang Juan¹, Yu Qiang², Liu Hui¹, Bai Yu³, Feng Wei¹

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Received		Published
2020-04-13		2021-08-20
Issue Date	Revised Date
2021-09-07	2020-04-13

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摘要

采用溶胶-凝胶法制备了Zn掺杂混晶TiO₂纳米材料,利用XRD、SEM、PL等测试方法对其进行了表征,并以甲基蓝溶液(MB)为目标污染物进行了光催化实验,研究了Zn掺杂浓度对TiO₂晶型结构与光催化性能的影响。结果表明,纯TiO₂为锐钛矿/金红石混合晶型;Zn掺杂能促进锐钛矿向金红石相的转变;当Zn/Ti摩尔比达到8%时,有新相ZnTiO₃生成,并表现出最高的光催化活性。反应进行90min后,对MB的降解率达到56.2%,反应速率常数为0.0079min^-1,分别为纯TiO₂的1.31倍与1.41倍。

Abstract

Zn-doped mixed phase TiO₂ nanomaterials were prepared by sol-gel method and characterized by XRD,SEM and PL measurements.The photocatalytic experiment was carried out by taking methyl blue (MB)solution as the target pollutant.The effects of Zn doping concentration on the crystal structure and photocatalytic performance of TiO₂ were studied.The results shown that pure TiO₂ was anatase/rutile mixed phase structure,and Zn doping can promote the anataseto rutile phase transformation.When the molar ratio of Zn/Ti reached 8%,a new phase ZnTiO₃ formed and exhibited the highest photocatalytic activity.After 90 minutes of reaction,the degradation rate of MB by 8% Zn-TiO₂ reached 56.2% and the reaction rate constant k was 0.0079min^-1,which were 1.31 times and 1.41 times higher than that of pure TiO₂.

关键词

二氧化钛 / Zn掺杂 / 光催化活性 / 混晶

Key words

TiO₂ / Zn-doping / photocatalytic activity / mixed phase

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Zn掺杂混晶TiO₂的制备及光催化性能研究[J]. 化工新型材料, 2021, 49(8): 136-139 DOI:10.19817/j.cnki.issn 1006-3536.2021.08.028

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