期刊
CHEMICAL PAPERS
卷 72, 期 2, 页码 369-379出版社
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s11696-017-0286-5
关键词
Photocatalytic activity; beta-cyclodextrin polymer microspheres; Cerium/titanium composite; Visible light
资金
- Research Innovation Program for College Graduates of Qiqihar University [YJSCX2016-ZD05]
- Research Project of Education Ministry of Heilongjiang Province of China [135209217, 135209223]
- Research Project of the Ministry of Human Resources and Social Security of China
A porous Ce/TiO2 composite exhibiting high photocatalytic activity was successfully prepared by a sol-gel method using beta-cyclodextrin (beta-CD) polymer microspheres as the template. The structural and morphological characteristics of the prepared Ce/TiO2 composites were examined by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, low-temperature N-2 adsorption-desorption, thermogravimetry-differential thermal analysis, diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The characterization results revealed that after the calcination of as-prepared Ce/TiO2 at 500 A degrees C, it exhibits a porous structure with a TiO2 anatase phase. The photocatalytic performance of the as-prepared samples according to their different molar ratios was evaluated toward the degradation of rhodamine B (RhB). Compared to commercial TiO2, the porous Ce/TiO2 composite exhibited a higher photocatalytic activity under visible light irradiation at room temperature, with a photodegradation rate of up to 80% for RhB (5 mg L-1) within 60 min. Addition of beta-cyclodextrin polymer microspheres as the template not only renders a porous structure but also inhibits the crystal growth and anatase-to-rutile transformation of TiO2. Doping with Ce was hypothesized to decrease the radiative recombination of the photogenerated electrons and holes in TiO2, extending its light response to the visible region. [GRAPHICS]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据