Co、N共掺杂介孔TiO<sub>2</sub>的制备和光催化性能

doi:10.11901/1005.3093.2016.388

材料研究学报

2017, Vol. 31

Issue (5): 381-386 DOI: 10.11901/1005.3093.2016.388

论文

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Co、N共掺杂介孔TiO₂的制备和光催化性能

艾力江·吐尔地¹, 阿不都卡德尔·阿不都克尤木¹(

), 马木提江·吐尔逊¹, 陈沛²

1 喀什大学化学与环境科学学院新疆特色药食用植物资源化学自治区重点实验室喀什 844007
2 陕西师范大学材料科学与工程学院应用表面与胶体化学教育部重点实验室西安 710062

Preparation and Photocatalytic Properties of Co and N Co-doped Mesoporous TiO₂

Ailijiang TUERDI¹, Abdukader ABDUKAYUM¹(

), Mamutjan TURSUN¹, Pei CHEN²

1 Xinjiang Laboratory of Native Medicinal and Edible Plant Resources Chemistry, College of Chemistry and Environmental Science , Kashgar University, Kashgar 844007, China
2 Key Laboratory of Applied Surface and Colloid Chemistry (MOE), School of Materials Science and Engineering,Shaanxi Normal University, Xi'an 710062, China

引用本文:

艾力江·吐尔地, 阿不都卡德尔·阿不都克尤木, 马木提江·吐尔逊, 陈沛. Co、N共掺杂介孔TiO₂的制备和光催化性能[J]. 材料研究学报, 2017, 31(5): 381-386.
Ailijiang TUERDI, Abdukader ABDUKAYUM, Mamutjan TURSUN, Pei CHEN. Preparation and Photocatalytic Properties of Co and N Co-doped Mesoporous TiO₂[J]. Chinese Journal of Materials Research, 2017, 31(5): 381-386.

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摘要:

以钛酸四丁酯为钛源,以三嵌段共聚物F127为模板剂,采用溶剂挥发诱导自组装法(EISA)制备Co、N共掺杂介孔TiO₂,用XRD、TEM、SEM、XPS、N₂吸附-脱附法和能谱等手段对材料的结构和形貌进行了表征。用紫外-可见吸收光谱法考察了催化剂对罗丹明B(RhB)和无色小分子2,4-二氯苯酚(DCP)的光催化降解效率。结果表明,样品具有较窄的孔径分布(3.65 nm),Co、N共掺杂介孔TiO₂后TiO₂的吸收范围扩展到可见光区,当用氙灯(模拟太阳光,500 W,λ>420 nm)光源对RhB和DCP进行光催化降解时,其光催化活性明显高于P25(纯TiO₂)和Co掺杂介孔TiO₂。对RhB和DCP分别光照120 min后,降解效率达到98.5%和66.3%以上。

关键词 ：复合材料, 介孔TiO₂, Co、N共掺杂, 光催化, 罗丹明B,2,4-二氯苯酚

Abstract：

The Co and N co-doped mesoporous TiO₂ was successfully synthesized by an evaporation-induced self-assembly process, using tetrabutyl titanate as a Ti source and triblock copolymer F127 as a template. The crystal structure and morphology of the synthesized mesoporous TiO₂ was characterized by means of XRD, TEM, SEM, EDX, XPS, and physical adsorption instrument. Photocatalytic activity of the photocatalyst was investigated through degradation of Rhodamine B (RhB) and 2, 4-dichlorophenol (DCP) by UV-visible absorption spectrometry. The results show that the Co and N co-doped mesoporous TiO₂presents a narrow pore size distribution (3.65 nm), and of which the light absorption band of photocatalyst was extended to visible light area after the Co and N co-doped mesoporous TiO₂, with a photocatalytic activity is significantly higher than that of the P25(pure TiO₂) and Co doped mesoporous TiO₂. Under visible light illumination (500 W xenon lamp, λ>420 nm) for the Co and N co-doped mesoporous TiO₂ photocatalysts exhibited excellent photocatalytic activity with, and the RhB and DCP degradation efficiencies y for RhB and DCP were as up to 98.3% and 66.3% respectively after irradiation 120 min.

Key words： composite mesoporous TiO₂ Co and N co-doped photocatalysis Rhodamine B,2,4-dichlorophenol

收稿日期: 2016-07-08

基金资助:新疆维吾尔自治区高校科研计划(XJEDU2014I038)和喀什大学校内课题基金(15-2572)

作者简介:

作者简介艾力江·吐尔地,男,1986年生,硕士,讲师

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图1 Co、N共掺杂介孔TiO2的XRD图

图2 Co、N共掺杂介孔TiO2的TEM、HRTEM、SEM-EDS和映射图像

图3 Co、N共掺杂介孔TiO2的N2吸附/脱附和孔径分布

表1 Co、N共掺杂介孔TiO2的孔结构参数

图4 Co、N共掺杂介孔TiO2的XPS图谱

图5 P25、Co掺杂介孔TiO2和 Co、N共掺杂介孔TiO2的UV-vis漫反射吸收光谱和带隙图

图6 P25,Co掺杂介孔TiO2和Co、N共掺杂介孔TiO2的(a)RhB, (b)DCP降解效率图

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