具有可见光响应的V-TiO_2/AC光催化剂的制备  

Preparation of V-doped TiO_2/AC Photocatalyst with Visible Light Response

作　　者：徐晶晶[1,2,3] 敖燕辉[1,2,3] 付德刚[1,2,3] 袁春伟[1,2] 

机构地区：[1]东南大学生物电子学国家重点实验室,江苏南京210096 [2]东南大学化学化工学院,江苏南京210096 [3]东南大学苏州研究院苏州环境与生物安全重点实验室,江苏苏州215123

出　　处：《郑州大学学报（工学版）》2008年第4期22-27,共6页Journal of Zhengzhou University（Engineering Science）

摘　　要：采用水热法在温和条件下制备了V掺杂的TiO2/活性炭(AC)光催化剂.利用XRD、SEM、漫反射、红外及荧光光谱对催化剂的物化性质进行了表征.结果显示,V-TiO2仍保持了锐钛矿相,没有出现V的衍射峰.相比纯TiO2,经过V掺杂的样品,具有较高的表面羟基密度,较低的载流子复合几率,同时吸收光谱向可见光区移动.将纳米级的V-TiO2沉积在AC上可形成微-纳结构.在可见光照射下,V-TiO2/AC催化降解4-氯苯酚的能力高于纯V-TiO2和P25,这可归因于V的掺杂和AC协同作用的结果.V - doped titania - coated activated carbon photocatalyst was prepared by htdrothermal method under mild condition. The characterization of tbe material was determined via X - ray diffraction, scanning electron microscopy, diffuse reflection, infrared spectra and fluorescence spectra. Results showed that V -doped TiO2/AC particles were consist of anatase phase, and no vanadium - derived peak was detected. V - doped TiO2 particles were deposited on the surface of AC to form a micro - nano structure. Enhanced OH density and slow recombination of photo - carries were detected in V - doping TiO2. This photocatalyst exhibited better photodegradation efficient of 4 - chlorophenol than TiO2 and P25 under visible illumination. It could be due to explansion of absorption edge by vanadium - doping and the synergistic effect of AC.

关 键 词：参数估计 奇异值分解 递推广义增广最小二乘法 Box-Jenkins模型 

分 类 号：TQ314.242[化学工程—高聚物工业]