Ni掺杂型钙钛矿复合炭材料的制备及其催化性能  

Preparation and Catalytic Performance of Ni Doping Perovskite Composite Carbon Materials

作　　者：唐彬 詹海鹃 吴丹[1,2] 吴之强 王刚[2] 毕淑娴 刘万毅[1,2] TANG Bin;ZHAN Haijuan;WU Dan;WU Zhiqiang;WANG Gang;BI Shuxian;LIU Wanyi(State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University,Yinchuan 750021,China;College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,银川750021 [2]宁夏大学化学化工学院,银川750021

出　　处：《硅酸盐通报》2020年第10期3359-3366,3385,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(21862013);宁夏回族自治区国内一流学科建设项目(NXYLXK2017A04);宁夏青年人才托举工程项目。

摘　　要：采用溶胶-凝胶法合成了一系列掺杂型LaNixMn1-xO3(x=0.1,0.3,0.5,0.7,0.9)钙钛矿催化剂,并采用机械研磨法制备LaNi0.9Mn0.1O3/活性炭,LaNi0.9Mn0.1O3/石墨烯复合材料。采用XRD、SEM、BET、XPS等手段对材料进行结构表征。结合光催化降解中性红反应,考察镍掺杂量和不同的炭载体对LaNi0.9Mn0.1O3结构以及催化性能的影响,并探讨复合材料的降解机理。结果表明,镍掺杂和炭负载都能够明显提高材料的催化性能。当x=0.9时,掺杂型催化剂的催化活性达到最佳,进一步负载炭材料后LaNi0.9Mn0.1O3/HAC催化剂性能最佳,其降解率可达到97%。镍的引入提高了催化剂的颗粒分散性,而炭材料负载使催化剂比表面积增大,两者都使表面活性氧O-/O2-含量增加,从而表现出较好的降解效果。A series of doped LaNixMn1-xO3(x=0.1,0.3,0.5,0.7,0.9)perovskite catalysts were synthesized by the sol-gel method.The composites LaNi0.9Mn0.1O3-activated carbon and LaNi0.9Mn0.1O3-graphene were prepared by the mechanical grinding method.Structural analysis of all materials were performed using X-ray diffraction,scanning electron microscopy,specific surface area measurements,and photoelectron spectroscopy.Combined with photocatalytic degradation of neutral red reaction,the effects of nickel doping and different carbon carriers on the structure and catalytic performance of LaNi0.9Mn0.1O3 were investigated,and the degradation mechanism of the composite was discussed.The results show that Ni doping and carbon loading significantly improve the catalytic performance of the materials.Among LaNi x Mn 1-x O 3 materials,LaNi0.9Mn0.1O3 has the best catalytic performance.The LaNi0.9Mn0.1O3/HAC shows excellent catalytic performance with a degradation rate of 97%.It follows that the introduction of Ni improves the particle dispersion of the catalysts,and the specific surface area of the catalysts increases with the load of carbon materials.The content of O-/O2-species on the catalyst surface increases with the Ni doping and carbon loading of the materials,which leads to better degradation activity.

关 键 词：钙钛矿 光化学 催化剂 中性红 

分 类 号：O643.36[理学—物理化学]