Effects of Ni doping contents on photocatalytic activity of B-BiVO_4 synthesized through sol-gel and impregnation two-step method  

Ni掺杂量对溶胶-凝胶和浸渍两步法制备B-BiVO_4光催化活性的影响（英文）

作　　者：Min WANG Guang-jun YANG Mei-yan YOU Yuan-hua XIE You-zhao WANG Jin HAN Tong ZHU 王敏;杨光俊;由美雁;谢元华;王有昭;韩进;朱彤(东北大学机械工程与自动化学院,沈阳110165)

机构地区：[1]School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110165, China

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第9期2022-2030,共9页中国有色金属学报（英文版）

基　　金：Projects (21207093,51004072) supported by the National Natural Science Foundation of China for Youth;Project (LJQ2014023) supported by the Liaoning Excellent Talents in University,China;Project (L20150178) supported by the General Scientific Research Projects Foundation of Liaoning Educational Committee,China;Project (N140303002) supported by the Fundamental Research Funds for the Central Universities,China

摘　　要：To enhance the photocatalytic activity of B-BiVO4,Ni-doped B?BiVO4photocatalyst(Ni-B-BiVO4)was synthesized through sol-gel and impregnation method.The photocatalysts were characterized by XPS,XRD,SEM,EDS,BET and UV-Vis DRS techniques.The results showed that single or double doping did not change the crystalline structure and morphology,but the particle size decreased with Ni doping.The band gap energy absorption edge of Ni-B-BiVO4shifted to a longer wavelength compared with undoped,B or Ni single doped BiVO4.More V4+and surface hydroxyl oxygen were observed in BiVO4after Ni-B co-doping.When the optimal mass fraction of Ni is0.30%,the degradation rate of MO in50min is95%for0.3Ni-B-BiVO4sample which also can effectively degrade methyl blue(MB),acid orange(AOII)II and rhodamine B(RhB).The enhanced photocatalytic activity is attributed to the synergistic effects of B and Ni doping.为了进一步提高B-BiVO_4的光催化活性,通过溶胶-凝胶和浸渍两步法制备Ni掺杂B-BiVO_4光催剂(Ni-B-BiVO_4)。通过XPS、XRD、SEM、BET、EDS和UV-Vis等手段对样品进行表征。结果表明,单或共掺杂均不会改变样品的晶型和形貌;但当掺入Ni后,样品的晶体粒径减小。与未参杂、B以及Ni单掺杂相比,Ni-B-BiVO_4样品的光吸收向长波长方向偏移;且N-B共掺杂后,样品中V^(4+)和表面羟基氧增多。当最佳Ni掺杂量为0.30%(质量分数)时,所制备的0.3Ni-B-BiVO_4在50 min内对甲基橙的降解率达95%左右,且该样品能有效降解亚甲基蓝(MB)、金橙II号(AOⅡ)和罗丹明B(RhB)溶液。共掺杂样品活性的提高主要是B与Ni的协同作用所致。

关 键 词：CO-DOPING Ni doping BIVO4 PHOTOCATALYST sol.gel method impregnation method 

分 类 号：O643.36[理学—物理化学]