摘要
将浓碱水热法制备的钛酸盐纳米管(TNT),采用二次水热和高温煅烧法制备了不同形貌的锐钛矿相TiO2纳米管(NT)和TiO2纳米棒(NB)光催化剂,通过XRD、TEM、UV-vis漫反射吸收光谱(DRS)对产物进行表征,研究光催化剂对氯霉素的光催化降解性能。结果表明,不同形貌TiO2光催化剂对氯霉素具有不同的催化活性,TiO2纳米管(NT)比TiO2纳米棒(NB)有更好的吸附性能;在高压汞灯辐射下,TiO2纳米棒(NB)对氯霉素的光催化降解效率高于TiO2纳米管(NT)。在高压汞灯下TiO2纳米管(NT)和TiO2纳米棒(NB)对氯霉素的光催化降解过程均遵从Langmuir-Hinshelwood动力学模型。
Taking titanate nanotubes (TNT) as the precursor, TiO2 nanotubes (NT) and TiO2 nanobat (NB) were prepared by two-step hydrothermal and calcination method. The products were characterized by XRD, TEM and DRS spectroscopy. The photocatalytic activity was evaluated using chloramphenicol (CAP) degradation under UV light irradiation. The results indicated that TiO2 with different morphology showed different photocatalyticability. TiO2 (NT) photocatalystssignificantlyimprovedtheadsorbabilit'yofCAP. The photocatalytic degradation rate was higher over TiO2 (NB)than TiO2(NT) under high-pressure mercury lamp irradiation. The photocatalytic degradation of CAP over TiO2 (NT)and TiO2 (NB) under high-pressure mercury lamp irradiation were all demonstrated to follow the Langmuir-Hinshelwood kinetic mode.
出处
《水处理技术》
CAS
CSCD
北大核心
2012年第10期34-37,共4页
Technology of Water Treatment
基金
国家自然科学基金(51102195)
高等学校博士点学科专项科研基金(20096118110008)
陕西省科技厅社发攻关基金(2011K17-03-02)
西安市科技创新支撑计划基金(CXY09025(1))
西安理工大学优秀博士学位论文研究基金项目资助(108-211005)