钛酸盐纳米棒的制备及其光催化活性研究  

Preparation and photocatalytic activity of titanate nanorods

作　　者：叶苗苗[1] 陈忠林[1] 沈吉敏[1] 刘小为[1] 杨磊[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《功能材料》2008年第12期2075-2078,共4页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2007AA06Z339);国家自然科学基金资助项目(50578052)

摘　　要：采用水热法制备了钛酸盐纳米棒，样品再分别经400、500、600和800℃热处理2h。利用XRD、SEM、TEM、BET、UV-vis等手段对样品的物化性能进行了表征。以4-氯硝基苯为目标反应物考察了样品的光催化活性。结果表明，钛酸盐纳米棒具有较高的热稳定性，直径分布在50～150nm，长度可达几微米。光催化结果显示，4-氯硝基苯的光催化降解反应为动力学拟一级反应，并且经500℃热处理后的钛酸盐纳米棒具有最高的催化活性，其表观速率常数为0．04215min^-1，是普通商用TiO2粉末的两倍。Titanate nanorods have been synthesized by means of a simple hydrothermal method, and then calcined at 400, 500, 600 and 800℃ for 2h, respectively. The as-prepared products were characterized by XRD, SEM, TEM, BET and UV-vis spectrum. The photocatalytic activities of the titanate nanorods were tested by the photocatalytic degradation of 4-chloronitrobenzene （4-CNB）. Results indicate that the titanate nanorods possess high heat stability with a diameter of about 50-150nm, and have a length up to a few micrometers. Photodegradation results show that the degradation of 4-CNB fit first-order kinetics, titanate nanorods calcined at 500℃ exhibit the highest photocatalytic activity, and the apparent rate constant is 0.04215min^-1 , which is twice more than that of commercial TiO2 powder.

关 键 词：钛酸盐纳米棒 水热法 4-氯硝基苯 光催化 

分 类 号：X703.1[环境科学与工程—环境工程]