以淀粉为模板制备N掺杂BiVO_4光催化剂
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摘要
以可溶性淀粉(S)为生物模板,以六次甲基四胺为氮源,采用水热法制备了掺杂氮钒酸铋(SN-BiVO_4),并采用XRD、SEM、FTIR、UV-Vis等技术手段进行了表征。以甲基橙溶液的脱色率为评价指标,考察BiVO_4样品的光催化活性。结果表明,在可见光下反应2 h,未添加任何辅助剂制备的BiVO_4对甲基橙的脱色率为27.4%,仅添加可溶性淀粉的S-BiVO_4对甲基橙的脱色率为35%,同时添加可溶性淀粉及n(N)∶n(Bi)=12%的12SN-BiVO_4对甲基橙的脱色率达到最大为77%,表明可溶性淀粉及氮对BiVO_4光催化活性均有不同程度的增强作用。
N-doped BiVO_4 was prepared by hydrothermal method using soluble starch as biological template and C_6H_(12)N_4 as N source.The photo-catalyst samples were characterized with XRD,SEM,FTIR,UV-Vis.The photocatalytic activities of BiVO_4 photo-catalyst samples were studied using degradation rate of MO in solution as evaluating indicator.The results showed the methyl orange decolorization rate of BiVO_4 without any auxiliary agent was 27.4%,while that of S-BiVO_4 with soluble starch was 35%,and the methyl orange decolorization rate of 12 SN-BiVO_4 with soluble starch and 12% of n(N)∶n(Bi)was reached to the maximum of 77%,indicating that both soluble starch and nitrogen could enhance BiVO_4 photocatalytic activity.
N-doped BiVO_4 was prepared by hydrothermal method using soluble starch as biological template and C_6H_(12)N_4 as N source.The photo-catalyst samples were characterized with XRD,SEM,FTIR,UV-Vis.The photocatalytic activities of BiVO_4 photo-catalyst samples were studied using degradation rate of MO in solution as evaluating indicator.The results showed the methyl orange decolorization rate of BiVO_4 without any auxiliary agent was 27.4%,while that of S-BiVO_4 with soluble starch was 35%,and the methyl orange decolorization rate of 12 SN-BiVO_4 with soluble starch and 12% of n(N)∶n(Bi)was reached to the maximum of 77%,indicating that both soluble starch and nitrogen could enhance BiVO_4 photocatalytic activity.
引文
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[3] GENG Y L,ZHANG P,LI N,et al.Synthesis of Co doped BiVO4 with enhanced visible-light photocatalytic activities[J].Journal of Alloys and Compounds,2015,651(12):744-748.
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[9] LIN X,GUO X Y,WANG Q W,et al.Hydrothermal synthesis and efficient visible light photocatalytic activity of Bi2MoO6/BiVO4 heterojunction[J].Acta Phys-Chim Sin,2014,30 (11):2113-2120.
[10] HU Y,CHEN W,FU J P,et al.Hydrothermal synthesis of BiVO4/TiO2 composites and their application for degradation of gaseous benzene under visible light irradiation[J].Applied Surface Science,2018,436 (4):319-326.
[11] 陈渊,周科朝,黄苏萍,等.BiVO4纳米片的水热合成及可见光催化性能[J].中国有色金属学报,2011,21(7):1570-1579.
[12] FAN H M,WANG D J,WANG L L,et al.Hydrothermal synthesis and photoelectric properties of BiVO4 with different morphologies:An efficient visible-light photocatalyst[J].Applied Surface Science,2011,257(17):7758-7762.
[13] WANG M,LIU Q,CHE Y S,et al.Characterization and photocatalytic properties of N-doped BiVO4 synthesized via a sol-gel method[J].Journal of Alloys and Compounds,2013,548(6):70-76.