检索结果-南通市图书馆

催化学报 2011年第5期32卷 812-815页

作者： K.KOí K.ZATLOUKALOV L.OBALOV S.KREJíKOV Z.LACNY L.APEK a.hospodkov O.OLCOV Faculty of Metallurgy and Material Engineering VB-Technical University of Ostrava Institute of Chemical Process Fundamentals CAS Faculty of Chemical Technology University of PardubiceStudentská95 Institute of Physics of the ASCR v.v.i.

Photocatalytic reduction of CO2 by water was performed in the presence of a Ag/TiO2 catalyst under illumination by lamps with different wavelengths(254,365,and 400 nm).The yields of the main products(methane and methanol)were higher with the 254 nm lamp than with the 365 lamp while no products were observed with the 400 nm *** was because the electron-hole generation rate increased with increasing energy of irradiation(decreasing wavelength)and there were higher densities of electron states at higher energies in TiO2. The increased efficiency of electron-hole generation with a shorter wavelength irradiation increased the efficiency of the *** energy of the electrons excited by visible light(400 nm)was too low for CO2 photocatalytic reduction.

关键词： silver doping titania carbon dioxide reduction photocatalysis wavelength

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

Zn_(x)Cd_(1-x)S量子点组成与其光催化活性的关系

引用

催化学报 2015年第3期36卷 328-335页

作者： Alice hospodková Ladislav Svoboda Petr Praus Institute of Physics of the Academy of Sciences of the Czech Republic v.v.i.CZ-16200 Prague 6Czech Republic Department of Chemistry VSB-Technical University of Ostrava17.listopadu 15708 33 Ostrava-PorubaCzech Republic Institute of Environmental Technology VSB-Technical University of Ostrava17.listopadu 15/2172Ostrava 708 33Czech Republic

Aqueous colloidal dispersions containing Znx Cd1‐x S quantum dots (QDs) of different x compositions were prepared by precipitating zinc and cadmium acetates with sodium sulphide,in the presence of a cetyltrimethylammonium bromide ***‐visible absorption spectroscopy was used to determine the transition energies of the QDs,which in turn were used to calculate their sizes,which depended on their *** QD size decreased with increasing Zn *** photocatalytic activity of the Znx Cd1‐x S QDs was studied by the decomposition of methylene blue under ultraviolet irradiation,at a maximum intensity at 365 nm (3.4 e V).Three different photo‐catalytic activity regions were observed,which depended on the Zn *** quantum levels of the QDs could be excited by incident irradiation,and influenced the resulting photocatalytic *** photocatalytic activity was achieved at x = 0.6,where the QD transition energy was equal to the irradiation photon *** photocatalytic efficiency of the QDs depended on their surface area and arrangement of quantum levels,because of the quantum size effect.

关键词： Quantum dot Znx Cd1-xS Photocatalysis Quantum level

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

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

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：