Microwave hydrothermal synthesis of lanthanum oxyfluoride nanorods for photocatalytic nitrogen fixation:Effect of Pr doping  

作　　者：Xiangyu Yan Da Dai Kun Ma Shixiang Zuo Wenjie Liu Xiazhang Li Chao Yao 

机构地区：[1]Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology,Changzhou University,Changzhou,213164,China [2]Department of Materials Science and Engineering,University of Delaware,Newark,DE,19716,USA

出　　处：《Frontiers of Materials Science》2020年第1期43-51,共9页材料学前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.51674043 and 51702026);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(SJCX18_0951).

摘　　要：Photocatalytic fixation of nitrogen has been recognized as a green and promising strategy for ammonia synthesis under ambient conditions.However,the efficient reduction of nitrogen remains a challenge due to high activation energy of nitrogen and low utilization of solar energy.Herein,lanthanum oxyfluoride with different doping content of Pr3+(LaOF:xPr3+)upconversion nanorods were synthesized by microwave hydrothermal method.Results indicated that the doping of Pr3+generated considerable defects on the surface of LaOF which acted as the adsorption and activation center for nitrogen.Meanwhile,the Pr3+ion narrowed the band gap and broadened the light response range of LaOF because LaOF:Pr3+can upconvert visible light into ultraviolet light,which excite LaOF nanorods and improve the utilization of solar light.The doping amount of Pr3+had critical effect on the photocatalytic nitrogen fixation performance which reached as high as 180μmol·L?1·ho1 when the molar ratio of Pr3+to LaOF was optimized to be 2%.

关 键 词：LaOF defect UPCONVERSION photocatalysis nitrogen FIXATION 

分 类 号：O61[理学—无机化学]