摘要
以硝酸铝为铝源,钛酸四丁酯为钛源,柠檬酸三铵为起泡剂,聚乙烯吡咯烷酮(PVP)作表面活性剂,采用低温溶液法制备TiO2/γ-AlO(OH)复合纳米粉体光催化剂;采用HRTEM、FESEM、EDS、XRD、紫外-可见漫反射光谱(UV-Vis DRS)和N2吸附-脱附(BET)等手段对复合材料进行表征;研究了γ-AlO(OH)掺杂量、PVP表面活性剂等对TiO2/γ-AlO(OH)复合纳米粉体的形貌及光催化活性的影响规律;探究了吸附作用对催化剂活性的影响。结果表明:载体材料γ-AlO(OH)纳米微球的介孔结构限制了TiO2纳米晶的团聚和长大,适当添加PVP表面活性剂可以减少复合粉体团聚,并调控其微观形貌;当γ-AlO(OH)掺杂质量分数为10%、PVP添加量为0.1 mmol时,制备的TiO2/γ-AlO(OH)复合粉体的BET比表面积为334.27 m2/g,催化性能最佳,光照30 min,对罗丹明B的降解效率为94.26%,远大于纯锐钛矿结构TiO2和市售P25催化剂。
TiO2/γ-AlO(OH)nanocomposite powder photocatalysts was synthesized by low-temperature solution method.In the above synthesis process,aluminum nitrate,tetrabutyl titanate,triammonium citrate and polyvinylpyrrolidone(PVP)were used as aluminum source,titanium source,foaming agent and surfactant,correspondingly.The synthesized nanocomposites were further characterized by HRTEM,FESEM,EDS,XRD,UV-Vis DRS and N2 adsorption-desorption(BET).In addition,effects of different parameters,includingγ-AlO(OH)doping mass fraction and PVP surfactant,on the morphology and photocatalytic activity of TiO2/γ-AlO(OH)composite nanopowders were investigated.Effect of adsorption on catalyst activity was also studied.Experimental results show that the mesoporous structure ofγ-AlO(OH)nanospheres(the support material)prevents agglomeration and growth of TiO2 nanocrystals.It is also found that,with adding proper PVP surfactant,agglomeration of composite powders can be slow down and micro-morphology of composite powders can be controlled.Experimental results indicate,with doping 10%mass fractionγ-AlO(OH)and adding 0.1 mmol PVP,TiO2/γ-AlO(OH)composite nano-powder has BET specific surface area of 334.27 m2/g and can exhibit the optimum catalytical performance.After 30 min of illumination,with using the synthesized nanocomposites,degradation efficiency of Rhodamine B can be 94.26%,which is much higher than pure anatase TiO2 and commercial P25 catalyst.
作者
王飞鸿
潘昆明
朱鹏飞
徐流杰
赵阳
朱宏喜
WANG Feihong;PAN Kunming;ZHU Pengfei;XU Liujie;ZHAO Yang;ZHU Hongxi(School of Materials Science and Engineering,He’nan University of Science and Technology,Luoyang 471000,China;National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,He’nan University of Science and Technology,Luoyang 471000,China)
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2020年第5期959-967,共9页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家重点研发计划基金项目(2017YFB0306000)资助。
