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Citation: HOU Chang-Jun, FAN Xiao-Hua, HUO Dan-Qun, DIAO Xian-Zhen, DONG Liang, TANG Yi-Ke, FAN Ying. The Stabilization Conditions of CTAB Reverse Microemulsion System and Preparation of WO₃ Nanoparticles[J]. Chinese Journal of Applied Chemistry, ;2007, 24(4): 401-405. shu

The Stabilization Conditions of CTAB Reverse Microemulsion System and Preparation of WO₃ Nanoparticles

1.
a College of Chemistry and Chemical engineering, Key Laboratory of Optoelectronic Technology and Systems of Ministry of Education, Chongqing University, Chongqing 400030;
2.
b Bioengineering Department, Chongqing University, Chongqing 400030;
3.
c State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030;
4.
d China Academy of Engineering Physics, Mianyang

Corresponding author: HOU Chang-Jun,
Received Date: 5 May 2006
Available Online: 29 July 2006
Fund Project: 国家自然科学基金(10376045) (10376045)重庆市自然科学基金(8418)资助项目 (8418)

Pseudo-ternary phase diagrams of reverse microemulsion systems of cetyl trimethyl ammonium bromide(CTAB),n-butanol,n-octane and Na₂WO₄ solution were studied by measuring the conductivity of the system.The composition range of the reverse microemulsion system that existed stably under different conditions was investigated.WO₃ nanoparticles were prepared under optimal conditions determined from the phase diagrams of the microemulsion systems.It was found that the ratio of surfactantaid to surfactant,and the concentration of Na₂WO₄ solution are two significant factors to affect the stability of the microemulsion system.When the ratio of m(CTAB):m(n-butanol) is 1:2 and the concentration of Na₂WO₄ solution is 0.05~0.08 g/mL,the microemulsion phase regions of the reverse microemulsion system that exists stably is bigger;when m(CTAB+n-butanol):m(n-octane) is 2:3,the system has the most quantity of dissolved water;and this system is insensitive to temperature.Under the optimal conditions,WO₃ nanoparticles were prepared from the reaction of reverse microemulsion of Na₂WO₄ solution(0.08 g/mL) and hydrochloric acid reverse microemulsion at 40℃ for 7 h.The WO₃ nanoparticles were characterized by TEM and the average particle size was about 30 nm.

Keywords:
microemulsion,

stability,

tungsten trioxide nanoparticle

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通讯作者: 陈斌, bchen63@163.com

The Stabilization Conditions of CTAB Reverse Microemulsion System and Preparation of WO₃ Nanoparticles