石油焦基活性炭/二氧化钛复合型光催化剂污水处理性能的研究  

Photocatalyst from Activated Carbon based on Petroleum Coke/Titanium Dioxide Composite for Wastewater Treatment

作　　者：梁佳 周园芳 薛茹萍 欧阳少波 熊道陵[2] 王萍 卢雄雄 李檬 Liang Jia;Zhou Yuanfang;Xue Ruping;Ouyang Shaobo;Xiong Daoling;Wang Ping;Lu Xiongxiong;Li Meng(Jiangsu SOPO Engineering Technology Co.,Ltd.,Zhenjiang 212000;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000;Yangming Primary School,Ganzhou 341000,China)

机构地区：[1]江苏索普工程科技有限公司,江苏镇江212000 [2]江西理工大学材料冶金化学学部,江西赣州341000 [3]赣州市阳明小学,江西赣州341000

出　　处：《广东化工》2021年第14期145-150,共6页Guangdong Chemical Industry

基　　金：国家级大学生创新创业训练资助项目(202010407015);江西省自然科学基金资助项目(2020BAB203020,2020BAB214021);江西省教育厅科学技术研究资助项目(GJJ200809)。

摘　　要：以高比表面积石油焦基活性炭为载体,利用溶胶-凝胶法制备二氧化钛(TiO2)负载型光催化剂,并探讨其对亚甲基蓝光催化降解性能。使用XRD、SEM、BET、TEM及EDS等检测手段,对催化剂表面形态进行表征。通过考察不同负载量、煅烧温度、升温速率、煅烧时间、固液比及亚甲基蓝浓度等因素对亚甲基蓝降解性能的影响,结果表明:所制备的负载型光催化剂,Ti O2颗粒能均匀地分散在活性炭表面,颗粒尺寸在10 nm左右,对亚甲基蓝具有较好的降解作用。在活性炭负载量6%、煅烧温度350℃、煅烧时间2 h、升温速率15℃/min、固液比0.5 g/L条件下制备的负载型催化剂,对浓度为10.44 mg/L的亚甲基蓝溶液,其降解率可达99%以上。对降解过程进行动力学模拟分析,该催化剂对亚甲基蓝催化降解过程符合准二级动力学模型,反应速率常数k为6.76 L/(g·min)。With activated carbon(AC) based on petroleum coke as support, the titanium dioxide(TiO2) loaded photocatalyst was prepared by a sol-gel method,and the photocatalytic degradation performance of methylene blue was discussed in detail. The surface morphology of the catalyst was characterized by XRD, SEM,BET, TEM, EDS, and so on. The effects of different loading amount of AC, calcination temperature, heating rate, heating time, solid-liquid ratio and methylene blue concentration on the degradation of methylene blue were investigated. The results obtained showed that for the prepared photocatalyst, TiO2 particles could be uniformly dispersed in the surface of the activated carbon, and the particle size is about 10 nm, which has a good degradation of methylene blue. Under the operation condition, such as loading amount of AC of 6 %, calcination temperature of 350 ℃, calcination time of 2 h, heating rate of 15 ℃, the solid-liquid ratio of 0.5 g/L,and the concentration of methylene blue of 10.44 mg/L, the degradation rate of methylene blue reached more than 99 %. According to the results of kinetic analysis,the catalytic degradation of methylene blue on the catalyst followed the pseudo-second-order kinetic model, and the reaction rate constant k was about 6.76 L/(g·min).

关 键 词：活性炭 光催化剂 二氧化钛 动力学分析 亚甲基蓝 

分 类 号：TQ[化学工程]