镍掺杂KLaNb_2O_7的光催化性能研究  

A Study on Photocatalytic Property of KLaNb_2O_7 Doping with Ni^(2+)

作　　者：陈淑红[1] 魏月琳[1] 张晓佩[1] 许静[1] 黄昀昉[1] 

机构地区：[1]华侨大学化工学院,福建厦门361021

出　　处：《广东化工》2012年第6期270-271,共2页Guangdong Chemical Industry

基　　金：福建省自然科学基金资助项目(NO.2010J01290);泉州市基金项目(NO.2011G4)

摘　　要：采用高温固相法和离子交换法制备了掺镍铌酸盐(Ni/KLaNb2O7)光催化剂。采用X-射线衍射、扫描电子显微镜和紫外可见漫反射等方法进行表征。研究了在紫外光照射下,甲醇为电子给体,Ni/KLaNb2O7裂解水的光催化活性,探讨了Ni2+对KLaNb2O7光催化活性的影响。研究结果表明,Ni2+的掺杂明显提高了KLaNb2O7裂解水的光催化活性。当Ni与Nb的摩尔比为0.3∶4时,产氢速率高达到1.62 mmol/(g.h)。A series of niobate KLaNb2O7 doping with Ni2＋ ion were synthesized by high temperature solid and ion-exchange methods.The samples were characterized by X-ray diffraction（XRD）,UV-vis diffuse reflectance spectra（DRS）,scan electron microscope（SEM） and energy dispersive spectrometer（EDS）.The photocatalytic activity was evaluated with the amount of hydrogen by splitting methanol solution under wavelength 290 nm light radiation,and discussed based on the influence of nickel on the photocatalytic activity of KLaNb2O7.It was found that the composite Ni-doped KLaNb2O7 showed a higher H2 evolution rate in comparison with individual materials.The highest rate of hydrogen evolution was 1.62 mmol/（g？h） while the doping value of Ni was 0.3： 4（Ni： Nb）.

关 键 词：掺杂 KLaNb2O7 光催化 氢气 

分 类 号：TQ131.13[化学工程—无机化工]