光催化-膜分离耦合反应装置中TiO_2/AC的基本特性  

The basic property of TiO_2/AC in the photocatalytic-membrane separation coupling equipment

作　　者：王蒙 解立平[1,2] 莎莉 于子钧[1] 李昌浩[1] 董妩嫘 赵紫叶[1] WANG Meng;XIE Li-ping;SHA Li;YU Zi-jun;LI Chang-hao;DONG Wu-lei;ZHAO Zi-ye(School of Environmental and Chemical Engineering;State Key Laboratory of Separation Membranesand Membrane Processes/ National Center for International Joint Research on SeparationMembranes,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]天津工业大学分离膜与膜过程国家重点实验室/分离膜科学与技术国家级国际合作研究中心,天津300387

出　　处：《化学工程》2018年第7期73-78,共6页Chemical Engineering(China)

基　　金：国家级大学生创新创业训练计划项目(201710058030);天津市科技计划项目(15PTSYJC00230)

摘　　要：采用溶胶-凝胶法制备了以活性炭为载体的负载型微米级TiO_2/AC催化剂,并利用XRD、SEM表征了TiO_2/AC的结构,考察了其在光催化-膜分离耦合反应装置中的光催化降解性能及其对膜通量的影响变化规律。结果表明:负载的TiO_2以锐钛矿为主,且分布较匀;微米级TiO_2/AC催化剂的光催化降解性能随催化剂投加量和酸性红B废水质量浓度的增加而先增大、后减小,亦随活性炭粒径的减小而先增大、后减小,膜通量随活性炭粒径的减小而先增大、后减小,适宜催化剂投加量和酸性红B废水的浓度以及活性炭粒径分别为0.7 g/L、18 mg/L和2.126μm。膜通量随膜底曝气量的增加而增大,并以0.042 m^3/h为宜,反冲洗能有效减缓催化剂引起的膜污染。The structure of the supported micro TiO2 /AC catalyst, prepared by sol-gel method with activated carbon as carrier, was characterized by XRD and SEM, and its photocatalytic degradation performance and the influence rules on the membrane flux were investigated in the photocatalytic-membrane separation coupling equipment. The result showed that the TiO2 supported on the activated carbon was mainly anatase, and its distribution was relatively homogenous. The photocatalytic degradation performance of micron TiO2 /AC catalyst firstly increased and then decreased with the increasing of the catalyst dosage and the acid red B wastewater mass fraction, and also firstly increased and then decreased with activated carbon size decreasing, while the membrane flux firstly increased and then decreased with the activated carbon size decreasing. The appropriate values of the catalyst dosage and the acid red B wastewater mass fraction as well as the activated carbon size were 0.7 g/L, 18 mg/L and 2.126 μm, respectively. The membrane flux increased with the increasing of the aeration rate under the membrane module, and the appropriate rate was determined as 0.042 m^3 /h. The backwashing could effectively decrease the membrane fouling caused by the TiO2 /AC.

关 键 词：微米级TiO2/AC催化剂 催化剂投加量 废水质量浓度 活性炭 膜底曝气 反冲洗 

分 类 号：O643[理学—物理化学] X791[理学—化学]