有序介孔TiO2活性炭可控制备及负载量对其结构与孔孔协同光催化性能影响重点解读.doc

有序介孔TiO2/活性炭可控制备及负载量对其结构与孔–孔协同光催化性能影响 李佑稷*，刘晨，徐鹏（吉首大学化学化工学院，湖南，中国 46000） 摘要：以十六烷基三甲基溴化铵(CTAB)表面活性剂和钛酸四丁酯分别为造孔模板和钛源，通过超声辅助溶剂挥发自组装技术制备有序介孔氧化钛（ordered mesoporous TiO2, OMPT）及其活性炭负载体（ordered mesoporous TiO2/AC, OMPTA)。为探讨OMPTA结构与性能关系，采用超声辅助溶胶–凝胶技术合成了无孔氧化钛/活性炭（noporous TiO2/AC, NPTA）负载体，利用热重–差热(TG–DTA)、X射线衍射(XRD)、氮气吸附–解吸、透射电镜(TEM)和紫外漫反射(DRS)等手段对制备材料结构进行表征。以(p-xylenol blue, PXB)的光催化降解为探针实验，评价OMTA的光催化性能和使用寿命，提出孔–孔协同光催化扩增机制并探讨了催化条件染料浓度和催化剂浓度)对协同扩增效果影响。结果表明：相对于纯OMPT，OMPTA具有较小晶粒尺寸–空穴复合率，这归功于活性炭的吸附力非晶相层对晶粒生长的阻碍作用 m2/g）；OMPTA比OMPT以及OMPTAC混合体具有更高的催化活性，这归功于孔–孔协同光催化扩增效应。影响OMPTA光催化活性，OMPT–3具备最高的光催化活性，这归功于其具备和高浓度的羟基。当使用OPTA–3为催化剂对(p-xylenol blue, PXB)降解时，最佳的催化条件为催化剂浓度g/L，浓度为mg/L，pH值为。关键词：模板；有序介孔TiO2/活性炭；协同光催化性能；中图分类号: TQ34 文献标识吗: A Preparation of ordered mesoporous TiO2 / activated carbon with high thermal stability and hole–hole synergistic photocatalytic property Youji Li, Chen Liu, Peng Xu （Jishou University, Department of Chemistry and Chemical Engineering, Hunan, China 416000） Abstract：By surfactant template technique with the aid of ultrasound system, the ordered mesoporous titania (OMPT) and OMPT/activated carbon (OMPTA) were prepared by using cetyl trimethyl ammonium bromide (CTAB) surfactant and tetrabutyl titanate as creating-pore template and titanium source, respectively. To explore the relationship between structure and properties OMPTA, ultrasound-sol-gel technique was applied to synthesize nonporous titania dioxide / activated carbon (noporous TiO2/AC, NPTA). The obtained material structure was characterized by thermogravimetric-differential thermal (TG-DTA), X-ray diffraction (XRD) , nitrogen adsorption - desorption, transmission electron microscopy (TEM) and UV diffuse reflectance (DRS). OMPTA photocatalytic performance and service life were evaluated by means of By p-xylenol blue (p-xylenol blue, PXB) as a probe photocatalytic degradation experiments. The hole-hole synergistic amplification mechanism of photocatalytic was been proposed?? and the effects of cataly