Photocatalytic properties of rutile nanoparticles obtained via low temperature route from titanate nanotubes

被引：16
作者：
Bavykin, Dmitry V. [1 ,2 ]
Kulak, Alexander N. [1 ,2 ]
Shvalagin, Vitaly V. [3 ]
Andryushina, Natalya S. [3 ]
Stroyuk, Olexander L. [3 ]
机构：
[1] Univ Southampton, Sch Engn Sci, Mat Engn Grp, Southampton SO17 1BJ, Hants, England
[2] Univ Southampton, Sch Engn Sci, Energy Technol Res Grp, Southampton SO17 1BJ, Hants, England
[3] Pysarzhevstki Inst Phys Chem, Photochem Dept, UA-03028 Kiev, Ukraine
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2011年 / 218卷 / 2-3期
基金：
英国工程与自然科学研究理事会;
关键词：
Solvothermal synthesis; Reflux; Surface area; Stability; Mechanism; Rutile nanoparticles; Photocatalysis; Hydrogen generation; Advanced oxidation; TIO2; NANORODS; OXIDATION; GAS; ETHANOL; OXIDE; NANOMATERIALS; ALCOHOLS; HYDROGEN; LITHIUM; ACIDS;
D O I：
10.1016/j.jphotochem.2011.01.006
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Acid treatment of titanate nanotubes with 0.1 mol dm(-3) H2SO4 results in their transformation into various forms of nanostructured TiO2, the shape and crystal structure of which depend on the temperature and time of treatment. Such a transformation at 25 degrees C results in the formation of rutile spheroidal nanoparticles, which are characterized by good crystallinity, high specific surface area (ca 250 m(2) g(-1) BET) and small average diameter of particles (ca. 3 nm). These particles are also characterized by increased activity in reactions of both photocatalytic generation of hydrogen from alcohol and advanced oxidation of organic species (ethanol). Acid assisted transformation of nanotubes at higher temperatures results in formation of nanostructured anatase/titanate composites with lower photocatalytic activity. The mechanism of transformation and the reasons for increased activity of rutile nanoparticles are discussed. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：231 / 238
页数：8
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