人工晶体学报2013，Vol.42Issue(6)：1230-1236,1246,8.
可见光催化剂Ni-BiVO4的水热合成及其光催化性能研究
Hydrothermal Synthesis of Visible Light Driven Ni-BiVO4 Photocatalysts and Its Photocatalytic Performance
摘要
Abstract
Ni-BiVO4 photocatalysts were prepared by hydrothermal method using Bi(NO3)3 · 5H2 O,NH4VO3 and Ni(NO3)2 · 6H2O as raw materials.The as-prepared BiVO4 samples were characterized by XRD,SEM,XPS,Raman and UV-Vis DRS.The effect of pH values on the phase and morphology of samples were studied.The photocatalytic activity of the Ni-BiVO4 powders was determinod by degradation of methylene blue(MB)molecules in water under visible light irradiation.The results showed that highly crystalline monoclinic scheelite structure of Ni-BiVO4 could be obtained through increasing the pH value.The XPS results revealed that the doped Ni species exists in the form of NiO.Compared with pure BiVO4,the Ni-BiVO4 catalyst has a red-shift in the absorption band in the visible region and its narrowed band gap (2.35 eV).The Ni-BiVO4 photocatalysts enhanced photocatalytic activities for degradation of methylene blue (MB) under visible light irradiation.When pH value was 5.0 and Ni content 2.0 wt％,the photocatalytic activities reached the maximum.After visible light irradiation for 120 min,the removal rate of MB byNi-BiVO4(2.0wt％ Ni) at 10mg/L initial concentration increases to 99.45％ while the removal rate of MB by pure BiVO4 is only 77％.The mechanism of enhanced photocatalytic activity has been discussed.关键词
水热合成/Ni-BiVO4/亚甲基蓝/光催化/可见光Key words
hydrothermal synthesis / Ni-BiVO4 / methylene blue / photocatalyst/ visible-light分类
数理科学引用本文复制引用
陈渊,杨家添,庞起,周科朝,黄健英..可见光催化剂Ni-BiVO4的水热合成及其光催化性能研究[J].人工晶体学报,2013,42(6):1230-1236,1246,8.基金项目
广西理工科学实验中心资助项目(LGZXKF201111) （LGZXKF201111）
