纳米TiO_2/碳纳米管复合颗粒的制备及光催化降解TNT废水  

Preparation of TiO_2/CNT Composite Particles and Application in the Photo-catalytic Degradation of TNT Wastewater

作　　者：杜仕国[1] 闫军[1] 汪明球[1] 王彬 

机构地区：[1]军械工程学院三系弹药保障与安全性评估实验室,河北石家庄050003 [2]军械技术研究所,河北石家庄050003

出　　处：《含能材料》2014年第6期862-866,共5页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(50842054);军械工程学院科学研究基金项目(YJJXM13016)

摘　　要：以钛酸丁酯为主要原料,利用胶溶-回流的方法在碳纳米管(CNT)表面制备了纳米Ti O2。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)观察了纳米Ti O2/碳纳米管(CNT)复合颗粒的形貌特征,X射线光电子能谱(XPS)分析显示复合颗粒表面存在Ti—O及—OH基团,Ti2p3/2和Ti2p1/2电子结合能差约为5.7e V。以TNT溶液为目标降解物,研究了复合颗粒的光催化性能,建立了吸附降解的动力学模型,结果表明Ti O2/CNT复合颗粒对TNT溶液的光催化降解符合一级反应动力学方程,在实验范围内降解速率随着TNT溶液初始浓度的增加而增加,降解动力学关系较好地遵循L-H模型。By using tetra-butyl titanate as raw material ,TiO2/CNT composite particles were prepared by peptization- reflux meth-od. Morphology of the samples was observed by scanning electron microscope（ SEM ） and transmission electron microscope （TEM）. X-ray Photoelectron Spectroscopy（XPS）analysis show that Ti-O and —OH groups exist on the surfaces of TiO2/CNT composite particles,and the difference between binding energies of Ti2p3/2 and Ti2p1/2 is about 5. 7 eV. The photo-catalytic activi-ty of composite particles was studied,and a degradation kinetic model was established by using TNT waste water as target pollu-tant. Results show that the process of degradation reaction accords with one order reaction kinetics equation. The degradation rate increases with the increase of the initial concentration of TNT in the experimental range,and the kinetic data match well with the L-H model.

关 键 词：材料科学 碳纳米管 纳米 TIO2 复合颗粒 光催化降解 

分 类 号：TB383.1[一般工业技术—材料科学与工程]