摘要
采用X射线衍射分析、扫描电镜分析和傅里叶红外光谱分析对溶胶-凝胶法制得的负载型微米级Ti O_2/活性炭(AC)催化剂性能进行了表征,并对其在光催化-膜分离耦合反应装置中光催化降解酸性红B废水时的性能和膜通量的影响进行了研究。结果表明:在最佳煅烧温度400℃时负载的Ti O_2以锐钛矿为主,与载体活性炭之间以Ti—O—C键结合,且分布较为均匀;微米级Ti O_2/AC催化剂的光催化降解性能随其煅烧温度的升高和粒径的减小而均呈现为先增加、后降低的趋势,Ti O_2/AC对膜通量的影响则随煅烧温度的升高和粒径的减小而呈先降低、后增加的趋势,且Ti O_2/AC粒径以10.272μm为宜。椰壳活性炭为载体的Ti O_2/AC催化剂的光催的化降解性能高于褐煤活性炭为载体的,且前者对膜通量的影响更小。微米级Ti O_2/AC催化剂的光催化降解性能高于商业Ti O_2的,且对膜通量的影响比商业Ti O_2的低。
The properties of load type micro Ti O_2/AC catalyst prepared by sol-gel method was characterized by XRD,SEM and FTIR,and the photocatalytic degradation performance of the catalyst and its influence on membrane flux were studied by photocatalytic degrading Acid Red B wastewater in photocatalytic-membrane separation coupling reaction.The results showed that at the optimum calcination temperature of 400℃,the Ti O_2 supported on the catalyst and its distribution was mainly anatase and relatively homogenous respectively,and Ti O_2 and carrier activated carbon was combined by Ti—O—C bond.The photocatalytic degradation performance of catalyst firstly increased,then decreased with the increase of calcination temperature and the decrease of catalyst size.The influence of membrane flux firstly decreased,then increased with the increase of calcination temperature and the decrease of catalyst size,and the appropriate catalyst size was 10.272μm. The photocatalytic degradation performance of micron Ti O_2/AC catalyst which made by coconut shell activated carbon was higher than that made by lignite activated carbon,and the former had less influence on the membrane flux. The photocatalytic degradation performance of micron Ti O_2/AC catalyst was higher than commercial Ti O_2,while the influence of membrane flux was lower than commercial Ti O_2.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2018年第3期1167-1173,共7页
Chemical Industry and Engineering Progress
基金
天津市科技计划项目(15PTSYJC00230)
天津市应用基础及前沿技术研究计划重点项目(11JCZDJC 24900)
