摘要
以十六烷基三甲基溴化铵(CTAB)为表面活性剂,优化水热合成条件,调控制备了氧化钛层柱蒙脱石材料.考察了实验过程中反应条件及CTAB用量对钛基蒙脱石层间距的影响,比较了钛基蒙脱石经500℃热处理前后层间纳米TiO2晶粒大小及形态的变化.结果表明,CTAB对水合钛基柱撑剂在蒙脱石纳米层间域的“生长”过程起到了调控的作用.应用拉曼光谱和XRD等对所得材料进行了结构分析,讨论了表面活性剂调控钛基柱撑蒙脱石的可能机理,为制备集吸附与光催化降解于一体的新型高效水处理材料提供了新途径.
A new method was proposed for preparation of photocatalyst TiO2-pillared montmorillonite with application of cetyltrimethylammonium bromide （CTAB） as a structure-oriented agent. The effect of amount of CTAB on the interlayer distance of Ti-pillared montmorillonite was investigated. And the differences of nano-TiO2 particle size and morphology before and after calcination at 500 ℃ were highlighted. The experimental results indicated that the ＂growth＂ of the hydrated Ti-polycations within clay interlayers could be regulated and controlled by the surfactant CTAB as the structure-oriented agent. FT-Raman spectroscopy and XRD were used to characterize the modified montmorillonite materials. The possible micro-mechanism of Ti-pillared montmorrilonite tailored by the surfactant CTAB was proposed. The modified montmorillonite material is expected to be an alternative to the preparation of water treatment materials with high adsorption capacity and photocatalytic activity.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2007年第1期90-94,共5页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:50474045)
