摘要
以不同预处理方法处理的竹炭为载体、钛酸四正丁酯为钛源,采用溶胶-凝胶法制备了TiO2/竹炭复合材料。以紫外灯为光源,通过一定浓度苯酚模拟废水的降解反应,考察TiO2/竹炭复合体催化剂的光催化活性,探讨了催化剂制备中竹炭的预处理方法对苯酚溶液的光催化反应的影响。结果表明,经NaOH溶液预处理的TiO2/竹炭复合材料具有较高的光催化活性,当TiO2负载量为40%、焙烧温度为500℃、焙烧时间为120 min时,制备的催化剂苯酚的最高降解率达40%,同时对催化剂的XRD、SEM和IR进行了表征。结果表明,所制备的TiO2/竹炭复合材料经过500℃焙烧后,其负载的TiO2主要呈锐钛矿型结构,TiO2在竹炭表面上呈均匀分散,同时TiO2改性后的竹炭,其表面化学活性较高的、氧化性的基团增多,从而有助于增强竹炭与TiO2的复合,提高催化剂对苯酚的降解活性。
TiO2/bamboo charcoal composites were prepared by sol -gel method with tetrabutyl titanate as the titanium source, and bamboo charcoal as the support. As for support, the bamboo charcoal was pretreated by three ways. The TiO2/bamboo catalysts were characterized by XRD, SEM, and IR. The photocatalytic degradation processes of phenol were studied. The results indicated that the composites calcined at 500℃ charactered the anatase titanium dioxide of TiO2 and better photocatalytie ability in the UV light, and the particle size of the TiO2/BC pretreatment by NaOH solution bacome smaller than the others two, and increased photocatalytic degradation of phenol.
出处
《广州化工》
CAS
2012年第2期95-97,100,共4页
GuangZhou Chemical Industry
基金
云南省大学生创新性实验计划项目基金(50106010)
西南林业大学面上基金(110922)
关键词
竹炭
二氧化钛
苯酚
光催化
bamboo charcoal
TiO2
phenol
photocatalytic
