色氨酸辅助合成光催化活性增强的球形纳米TiO2

doi:10.16085/j.issn.1000-6613.2017-0725

化工进展 ›› 2018, Vol. 37 ›› Issue (01): 175-181.DOI: 10.16085/j.issn.1000-6613.2017-0725

色氨酸辅助合成光催化活性增强的球形纳米TiO₂

李彬^1,3, 陈星炜¹, 张天永^1,2, 姜爽^1,3, 张光辉¹, 吴武斌¹

1 天津大学化工学院, 天津市应用催化科学与工程重点实验室, 天津 300354;
2 天津化学化工协同创新中心, 天津 300354;
3 天津市功能精细化学品技术工程中心, 天津 300354

收稿日期:2017-04-24 修回日期:2017-05-11 出版日期:2018-01-05 发布日期:2018-01-05
通讯作者: 张天永,教授,博士生导师;姜爽,讲师,研究方向为精细化学品合成。
作者简介:李彬(1982-),男,博士,副教授,硕士生导师。
基金资助:
国家自然科学基金（21276187）、天津市自然科学基金（16JCYBJC20800）及天津市科技创新平台计划（14TXGCCX00017）项目。

Tryptophan assisted synthesis of spherical nanometer TiO₂with enhanced photocatalytic activities

LI Bin^1,3, CHEN Xingwei¹, ZHANG Tianyong^1,2, JIANG Shuang^1,3, ZHANG Guanghui¹, WU Wubin¹

1 Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China;
2 Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300354, China;
3 Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300354, China

Received:2017-04-24 Revised:2017-05-11 Online:2018-01-05 Published:2018-01-05

摘要/Abstract

摘要： 以L-色氨酸（L-Trp）为生物模板，采用简单水解及煅烧后制备了球形结构TiO₂纳米光催化剂。通过X射线衍射、扫描电子显微镜、红外光谱、紫外-可见漫反射光谱、光致发光光谱和N₂吸附-解吸等方法对制得的TiO₂纳米材料进行表征。在催化剂合成过程中，L-Trp作为生物模板发挥至关重要的作用，能够指导球形结构纳米TiO₂的形成。考察了不同煅烧温度下制备的TiO₂样品光催化活性，结果表明550℃时制备的TiO₂样品具有优异的光催化活性，紫外光照射30min对甲基橙溶液的降解率达到95%左右，主要是由于较大比表面积和球形结构的协同效应。光催化剂稳定性实验表明，所制备的TiO₂纳米材料可作为一种实用有效的光催化剂用于紫外光照射下降解有机染料。同时，对L-Trp辅助下球形结构TiO₂纳米颗粒的可能生长机理进行讨论。

关键词: 色氨酸, 光催化, 二氧化钛, 球形结构, 机理

Abstract: The spherical structure TiO₂ nano photocatalyst was prepared by simple hydrolysis followed by calcination with L-tryptophan (L-Trp) as biological template. The prepared TiO₂ was characterized by X-ray diffraction, scanning electron microscopy, infrared spectroscopy, UV-vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, and N₂ adsorption-desorption. The L-Trp played a crucial role in the formation of photocatalysts, which could induce the formation of spherical structure TiO₂. The photocatalytic activity of TiO₂ samples prepared at different calcination temperatures was investigated. The results showed that the TiO₂ prepared at 550℃ exhibited an excellent photocatalytic activity, and the degradation rate of methyl orange (MO) solution reached about 95% under UV light irradiation in 30min, which was mainly due to the synergistic effect of large BET surface area and spherical structure. The results of photocatalytic stability test indicated that the prepared TiO₂ nanomaterials could be used as practical and effective photocatalysts for the degradation of organic dyes under UV light irradiation. Furthermore, the possible growth mechanism of spherical structure TiO₂ nanoparticles supported by L-Trp was discussed.

Key words: tryptophan, photocatalysis, titanium dioxide, spherical structure, mechanism

中图分类号:

TQ426

李彬, 陈星炜, 张天永, 姜爽, 张光辉, 吴武斌. 色氨酸辅助合成光催化活性增强的球形纳米TiO₂[J]. 化工进展, 2018, 37(01): 175-181.

LI Bin, CHEN Xingwei, ZHANG Tianyong, JIANG Shuang, ZHANG Guanghui, WU Wubin. Tryptophan assisted synthesis of spherical nanometer TiO₂with enhanced photocatalytic activities[J]. Chemical Industry and Engineering Progress, 2018, 37(01): 175-181.

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色氨酸辅助合成光催化活性增强的球形纳米TiO₂

Tryptophan assisted synthesis of spherical nanometer TiO₂with enhanced photocatalytic activities

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