检索结果-南通市图书馆

Photocatalysis Activity and Physicochemical Structure of Titanium Dioxide Co-doped with N and B

Chinese Journal of Structural Chemistry 2008年第11期27卷 1353-1359页

作者：颜桂炀郑柳萍林深叶金花 College of Chemistry and Materials Science Fujian Normal University State Key Laboratory Breeding Base of Photocatalysis Fuzhou University

Titanium dioxide co-doped with N and B was prepared by sol-gel method. The photocatalytic activity was evaluated by the photodegradation of methylene blue under visible light. Its physicochemical properties were characterized by means of UV-Vis DRS, XRD, PT-IR, and XPS. The results indicated that N-B-TiO2 has good activity to the photodegradation of MB. Its decolourizing rate of methylene blue solution goes up to 98.4% under the visible light irradiation with 5 h. The doping nitrogen forms N-Ti-O and boron primarily existing in oxide appears in the N-B-TiO2 sample. They response for visible light of TiOa was also exploited.

关键词： sol-gel N-B co-doped visible light photoeatalysis physieochemieal structure methylene blue

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis of Gd-N Codoped Porous TiO2 Photocatalyst and Its Enhanced Photocatalytic Activities

引用

Chemical Research in Chinese Universities 2016年第6期32卷 1038-1044页

作者： YU Yanmin LI Hua PIAO Lijin CHEN Huiying WANG Wenzhong XIA Jianxin College of Life and Environmental Sciences Minzu University of China Beijing 100081 P. R. China Medical College Hubei University of Arts and Science Xiangyang 441053 P. R. China

Visible-light-active Gd-N codoped porous TiO2（Gd-N-TiO2） photocatalyst was fabricated by an evapora-tion-induced self-assembly route using surfactants as structure-directed agents. As-prepared samples were characte-rized by X-ray diffraction, field-emission scalming electron microscopy, transmission electron microscopy（TEM）,X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller（BET） method, and ultraviolet-visible absorption spec-troscopy. The results indicated that synergistic reaction occurred when codoping with Gd^3＋ and N, which enhancedthe light absorption properties of TiO2. Irregular worm-like particles with wide interparticle spaces were clearlyobserved by TEM. The average particle size of Gd-N-TiO2 decreased to ca. 8 nm because co-doping inhibited theparticles growth significantly. Thus, the specific surface area of Gd-N-TiO2（198.7 m^2/g） was higher than that ofDegussa P25 TIO2（50 m^2/g）. Gd-N-TiO2 exhibited a high photocatalytic activity toward methyl orange degradationunder UV-Vis or visible-light irradiation. The Gd-N-TiO2 catalyst also presented a stable performance without losingactivity after four successive photocatalytic experiments. The facile synthesis and excellent activity of Gd-N-TiO2indicated its great potential as industrial catalysts for wastewater treatment.

关键词： TiO2 Gadolinium ion Nitrogen Codoping photoeatalysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of La^(3+) Non-Uniformly Doping in TiO_2 Films on Photocatalytic Activities

引用

Journal of Rare Earths 2005年第6期23卷 700-700页

作者： Cen Jiwen Li Xinjun He Mingxing Zheng Shaojian Feng Manzhi Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

TiO2 thin films non-uniformly doped by La^3＋ were prepared by sol-gel method. The comparison of thin film activities, which was characterized by photocatalytic degradation of methyl orange, shows that doping modes have great activities. The non-uniformly effects on photocatalytic doped TiO2 films resuh in good photocatalytic activities with an optimal concentration; about 0. 5% （ atom fraction ）. UV-Vis transmittance spectra indicate that the absorption edges of these TiO2 thin films shift to ward longer wave- lengths remarkably, and electrochemical behavior also reveales that e^- -h^＋ pairs are prone to formation and separation under UV irradiation. The mechanism of photocatalytic activities are enhanced by La^3＋ non-uniformly doping was discussed on the analogy of the theory of “window effect” of solar cell heterojunction.

关键词： photoeatalysis non-uniform doped TiO2 La ion rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：