One-step Hydrothermal Synthesis of TiO2 Nanowires and Their  Photocatalytic Activities

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (11): 2483.

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One-step Hydrothermal Synthesis of TiO2 Nanowires and Their Photocatalytic Activities

WEI Qiu-Fang, CHEN Yong-Jun*

School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China

Received:2011-02-28 Revised:2011-04-30 Online:2011-11-10 Published:2011-10-14
Contact: CHEN Yong-Jun E-mail:chenyj99@163.com
Supported by:
国家自然科学基金(批准号: 50862001)和广西大学人才引进基金资助.

Abstract

Abstract: Titanium dioxide(TiO2) nanowires were synthesized by one\|step hydrothermal method using tetrabutyl titanate, isopropanol and sodium hydroxide as starting materials. The synthesized TiO2 nanowires were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD) and energy dispersive X-ray spectrometry(EDX). The effects of reaction temperature, concentration of sodium hydroxide and reaction time on the formation of the nanowires were investigated. It is found that the optimum reaction temperature, concentration of sodium hydroxide and reaction time for the formation of high quality TiO2 nanowires are 180 ℃, 10 mol/L and 24 h, respectively. The nanowires were still anatase phase even if the calcination temperature increased to 950 ℃, indicating that the phase transition of TiO2 from anatase to rutile was delayed. In addition, the photocatalytic activities of pure TiO2 nanowires and TiO2 nanowires doped with Eu were studied under the irradiation of 300 W UV-lamp for 60 min, using methyl orange solution as the target degradation material. The results indicate that the degradation ratio of Eu-doped TiO2 nanowires is 1.5 times that of pure TiO2 nanowires, and the optimum doping amount of Eu is 1.6%.

Key words: TiO2 nanowire, Tetra-butyl titanate, Hydrothermal method, Photocatalytic activity

CLC Number:

O614

TrendMD:

WEI Qiu-Fang, CHEN Yong-Jun*. One-step Hydrothermal Synthesis of TiO2 Nanowires and Their Photocatalytic Activities[J]. Chem. J. Chinese Universities, 2011, 32(11): 2483.

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One-step Hydrothermal Synthesis of TiO2 Nanowires and Their Photocatalytic Activities

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