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TiO2纳米粒子包覆聚苯乙烯球的结晶性能与表面光电压特性
引用本文:张明,高歌,赵大成,张丹,杨敏,王德军,刘凤岐.TiO2纳米粒子包覆聚苯乙烯球的结晶性能与表面光电压特性[J].高等学校化学学报,2004,25(11):2122-2124.
作者姓名:张明  高歌  赵大成  张丹  杨敏  王德军  刘凤岐
作者单位:吉林大学化学学院,长春,130023
基金项目:国家自然科学基金(批准号: 20274014)资助.
摘    要:TiO2具有很高的光催化活性,同时TiO2纳米粒子具有耐酸碱和耐光化学腐蚀、低成本、无毒等性质,在许多领域引起广泛关注.据报道,TiO2的锐钛矿晶型比金红石晶型具有更好的光催化活性.由于金红石是TiO2的热力学稳定相,而锐钛矿是亚稳相,通常锐钛矿相在550-800℃温度范围内形成金红石相,从而降低其催化活性,限制了其应用.

关 键 词:TiO2  杂化微球  结晶  表面光电压谱
文章编号:0251-0790(2004)11-2122-03
收稿时间:2004-05-28

Crystallization and Surface Photovoltage Properties of Polystyrene Coated by TiO2 Nanoparticles
ZHANG Ming,GAO Ge,ZHAO Da-Cheng,ZHANG Dan,YANG Min,WANG De-Jun,LIU Feng-Qi.Crystallization and Surface Photovoltage Properties of Polystyrene Coated by TiO2 Nanoparticles[J].Chemical Research In Chinese Universities,2004,25(11):2122-2124.
Authors:ZHANG Ming  GAO Ge  ZHAO Da-Cheng  ZHANG Dan  YANG Min  WANG De-Jun  LIU Feng-Qi
Institution:ZHANG Ming,GAO Ge,ZHAO Da-Cheng,ZHANG Dan,YANG Min,WANG De-Jun,LIU Feng-Qi*
Abstract:Hybrid microballs with polystyrene cores coated by titania nanoparticles were prepared by miniemulsion polymerization. The crystallization morphology and photovoltage properties of the hybrid particles after calcination were characterized by Scanning Electron Microscope(SEM), X-ray diffraction and surface photovoltage spectra(SPS). The crystal morphology has a critical effect on the threshold. It is found that the materials become prous, the thresholds of TiO 2 particles blue-shift with their particle sizes decreasing and crystal phase changing from anatase TiO 2 to rutile TiO 2. The SPS results showed that the peak height was three times the height of common TiO 2 nanoparticles.
Keywords:TiO  2  Hybrid microballs  Crystallization  Surface photovoltage spectrum(SPS)
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