摘要
采用水热处理工艺制得含有MnFe2O4纳米球的g-C3N4复合光催化剂,并对催化剂的各项物化特性进行表征,同时研究了水热法制备参数对MnFe2O4/g-C3N4催化剂光催化降解双酚A的影响。结果表明,MnFe2O4/g-C3N4形成了g-C3N4和MnFe2O4对应的衍射峰,没有杂峰出现,在层状g-C3N4纳米片上分布着许多球形MnFe2O4小颗粒,表明可以利用水热工艺制备得到MnFe2O4/g-C3N4复合半导体。随着MnFeO4掺杂量提高,双酚A去除率先上升再下降;提高催化剂用量,双酚A去除率先上升再下降;改变pH值后,双酚A保持基本稳定的去除率,当pH=9时,双酚A去除率最高,达到99%。采用MnFe2O4对g-C3N4改性处理后能够达到更高效的双酚A去除效果。
The g-C3N4 composite photocatalyst containing MnFe2O4 nanometer spheres was prepared by hydrothermal treatment.The physical and chemical properties of composite photocatalyst were tested,and the effect of hydrothermal preparation parameters on photocatalytic degradation of BPA over MnFe2O4/g-C3N4 catalyst was studied.The results show that the MnFe2O4/g-C3N4 forms the diffraction peak corresponding to g-C3N4 and MnFe2O4,and is free of diffraction peak corresponding to the impurity component.Many small spherical particles of MnFe2O4 are distributed on the layered g-C3N4 nanometer sheet.The MnFe2O4/g-C3N4 composite semiconductor can be prepared by hydrothermal process.As the doping amount of MnFeO4 and catalysts dosage gradually increased,the BPA removal rate firstly increase and then decrease.As changing of pH value,BPA removal efficiency maintains basically stable.At pH value of 9,the maximum removal rate of BPA is 99%.After modification of MnFe2O4,the g-C3N4 could remove BPA more efficiently.
作者
陈梅荣
王金玉
Chen Meirong;Wang Jinyu(Department of Petroleum and Chemical Engineering,Yan'an Vocational and Technical College, Yan'an 716000,Shaanxi,China;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,Sichuan,China)
出处
《工业催化》
CAS
2020年第11期72-76,共5页
Industrial Catalysis
