Ti3+自掺杂的纳米TiO2的制备及其可见光催化性能

doi:10.1016/S1872-2067(14)60234-5

催化学报 ›› 2015, Vol. 36 ›› Issue (3): 389-399.DOI: 10.1016/S1872-2067(14)60234-5

Ti³⁺自掺杂的纳米TiO₂的制备及其可见光催化性能

王潇彤^a, 李延敏^b, 刘新^a, 高善民^a,c, 黄柏标^c, 戴瑛^c

a 鲁东大学化学与材料科学学院, 山东烟台264025;
b 鲁东大学生命科学学院, 山东烟台264025;
c 山东大学晶体材料国家重点实验室, 山东济南250100

收稿日期:2014-09-01 修回日期:2014-09-29 出版日期:2015-02-14 发布日期:2015-02-14
通讯作者: 李延敏, 高善民
基金资助:
国家重点基础研究发展计划(973计划, 2013CB632401); 山东省自然科学基金重点项目(ZR2013EMZ001); 山东省高等学校科技计划(J12LA01).

Preparation of Ti³⁺ self-doped TiO₂ nanoparticles and their visible light photocatalytic activity

Xiaotong Wang^a, Yanmin Li^b, Xin Liu^a, Shanmin Gao^a,c, Baibiao Huang^c, Ying Dai^c

a College of Chemistry and Materials Science, Ludong University, Yantai 264025, Shandong, China;
b School of Life Science, Ludong University, Yantai 264025, Shandong, China;
c State Key Lab of Crystal Materials, Shandong University, Jinan 250100, Shandong, China

Received:2014-09-01 Revised:2014-09-29 Online:2015-02-14 Published:2015-02-14
Supported by:
This work was supported by the National Basic Research Program of China (973 Program, 2013CB632401), the Key Project of Natural Science Foundation of Shandong Province (ZR2013EMZ001), and the Project of Shandong Province Higher Educational Science and Technology Program (J12LA01).

摘要/Abstract

摘要：

以TiH₂为Ti源, H₂O₂为氧化剂, 首先通过表面氧化得到不同状态的前驱体凝胶, 然后采用后续水热处理制备Ti³⁺自掺杂的纳米TiO₂.考察了前驱体凝胶状态及水热处理时间对材料结构和性能的影响.利用X射线衍射、透射电子显微镜、X射线光电子能谱、电子顺磁共振波谱和紫外-可见漫反射光谱手段对样品进行表征.以次甲基蓝溶液为模拟废水评价样品的可见光催化降解性能.结果表明, 与纯TiO₂相比, Ti³⁺的自掺杂使材料在可见光区有明显的吸收, 并具有良好的可见光催化降解性能和循环使用性能.当采用黄色凝胶为前驱体时, 在160 ℃下水热处理24 h所得样品在可见光下光催化降解次甲基蓝的反应速率常数(0.0439 min^-1)是纯TiO₂的18.3倍.

关键词: Ti³⁺自掺杂, 二氧化钛, 凝胶, 水热法, 可见光催化

Abstract:

Ti³⁺ self-doped TiO₂nanoparticles were synthesized by hydrothermal treatment of a gel precursor obtained using TiH₂ as the Ti source and H₂O₂ as oxidant. The effects of different states of gel and hydrothermal treatment time on the properties of the samples were studied. The structure, crystallinity, morphology, and optical properties of the nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microcopy, and UV-visible diffuse reflectance spectroscopy. The chemical states of Ti and O were confirmed by X-ray photoelectron spectroscopy and electron spin resonance spectroscopy. Methylene blue (MB) solutions were used as simulated wastewater to evaluate the visible-light photocatalytic activity of the samples. The samples exhibited strong absorption in the visible light region compared with pure TiO₂and an excellent performance in the photocatalytic degradation of MB. When yellow gel was used as the precursor, the sample obtained after hydrothermal treatment at 160 ℃ for 24 h exhibited the best visible light photocatalytic activity with a reaction rate constant of 0.0439 min^-1, 18.3 times that of pure TiO₂. The samples also showed excellent cyclic stability of the photocatalytic activity.

Key words: Ti³⁺self-doped, Titanium oxide, Gel, Hydrothermal method, Visible light photocatalysis

王潇彤, 李延敏, 刘新, 高善民, 黄柏标, 戴瑛 . Ti³⁺自掺杂的纳米TiO₂的制备及其可见光催化性能[J]. 催化学报, 2015, 36(3): 389-399.

Xiaotong Wang, Yanmin Li, Xin Liu, Shanmin Gao, Baibiao Huang, Ying Dai. Preparation of Ti³⁺ self-doped TiO₂ nanoparticles and their visible light photocatalytic activity[J]. Chinese Journal of Catalysis, 2015, 36(3): 389-399.

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Ti³⁺自掺杂的纳米TiO₂的制备及其可见光催化性能

Preparation of Ti³⁺ self-doped TiO₂ nanoparticles and their visible light photocatalytic activity

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