摘要
分别以钛酸正丁酯和四氯化钛为前驱体,采用溶胶-凝胶法制备不同形貌的纳米TiO2。利用十二烷基苯磺酸钠(DBS)、十二烷基磺酸钠(SDS)、羟丙基甲基纤维素(HPMCS)控制纳米TiO2形貌,考察了纳米TiO2对甲基橙的光催化活性。XRD分析表明焙烧温度500℃时所得纳米TiO2为锐钛型晶相。UV-vis分析表明加表面活性剂时所制备纳米TiO2吸收发生红移,带隙能下降。不同形貌纳米TiO2具有不同的光催化活性,加SDS时所得立方形纳米TiO2的光催化活性高于其它样品。焙烧温度600℃时纳米TiO2对甲基橙的光催化活性最强。
Different morphologies of TiO2 nanoparticles were prepared through the sol-gel method using titanium butoxide and titanium chloride as precursors. The shapes of TiO2 nanoparticles were controlled by using sodium dodecyl benzene sulfonate （DBS）, sodium dodecyl sulfate （SDS） and hydroxypropyl methyl cellulose （HPMCS） as shape-controlled agent. The photocatclytic activity of the TiO2 nanoparticles was evaluated using methyl orange as model compound. The XRD results indicated that the TiO2 nanoparticles calcined at 500℃ had the anatase phase. The UV-vis absorption spectra suggested that the TiO2 nanoparticles shaped by surfactants showed a red shift and lower band gap energy. TiO2 nanoparticles with different shapes showed different photocatalytic activities. The cubic TiO2 nanoparticles shaped by DBS had a higher photocatclytic activity than other samples. TiO2 nanoparticles calcined at 600℃ had a highest photocatalytic activity toward methyl orange.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2009年第2期29-33,共5页
Journal of Materials Engineering
基金
江西省教育厅科技项目(CJJ08302)
东华理大学核资源与环境开放基金(070710)
