二氧化硅负载碘氧化铋光催化降解甲基橙性能研究
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摘要
采用沉淀-浸渍法制备了不同负载量的二氧化硅负载碘氧化铋催化剂,考察了其光催化降解甲基橙性能。采用XRD、UV-Vis、TEM对催化剂进行了表征。结果表明,随着碘氧化铋负载量的增加,二氧化硅负载碘氧化铋催化剂光催化降解甲基橙的降解率升高。当碘氧化铋和二氧化硅的物质的量比为0.5时,二氧化硅负载碘氧化铋催化剂降解甲基橙的降解率60 min时可达73.74%。不同粒径二氧化硅负载的碘氧化铋催化剂对甲基橙的降解率接近,因为活性组分碘氧化铋都可以高度分散在不同粒径的二氧化硅载体上。
BiOI/SiO_2 catalysts with different loadings were prepared by precipitation-impregnation method,and their performance of photocatalytic degradation of methyl orange was investigated.The catalyst was characterized by XRD,UV-Vis and TEM.The results showed that the photocatalytic degradation rate of methyl orange by BiOI/SiO_2 catalyst increased with the increase of Bi OI loading.When the amount-of-substance ratio of BiOI to SiO_2 was 0.5,the degradation rate of methyl orange by Bi OI/SiO_2 catalyst could reach 73.74% in 60 min.The degradation rate of methyl orange of BiOI supported on SiO_2 with different particle sizes was almost similar,because the active component BiOI could be highly dispersed on SiO2 supports with different particle size.
BiOI/SiO_2 catalysts with different loadings were prepared by precipitation-impregnation method,and their performance of photocatalytic degradation of methyl orange was investigated.The catalyst was characterized by XRD,UV-Vis and TEM.The results showed that the photocatalytic degradation rate of methyl orange by BiOI/SiO_2 catalyst increased with the increase of Bi OI loading.When the amount-of-substance ratio of BiOI to SiO_2 was 0.5,the degradation rate of methyl orange by Bi OI/SiO_2 catalyst could reach 73.74% in 60 min.The degradation rate of methyl orange of BiOI supported on SiO_2 with different particle sizes was almost similar,because the active component BiOI could be highly dispersed on SiO2 supports with different particle size.
引文
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[2]王燕琴,瞿梦,冯红武,等.卤氧化铋光催化剂的研究进展[J].化工进展,2014,33(3):660-667.
[3]孙海杰,陈凌霞,李晓艳,等.BiOI/ZrO2光催化降解甲基橙性能研究[J].河南科学,2019,37(1):48-52.
[4]姜鸿基,李彦锋,叶正芳,等.纳米TiO2光催化剂的制备及在降解有机物方面的研究进展[J].功能材料,2002,33(4):360-362.
[5]崔玉民,洪文珊,李慧泉,等.BiOI/Bi2WO6对甲基橙和苯酚的光催化降解及光催化机理[J].无机化学学报,2014,30(2):431-441.
[6]张琼,陈卓华,徐作成,等.AgI/BiOI异质结催化剂的制备及其可见光催化降解酸性橙Ⅱ的性能研究[J].中山大学学报,2012,51(6):82-86.
[7]杨毅,王起伟,王连军.纳米TiO2/Si O2复合颗粒催化性能研究[J].环境科学与技术,2009,32(4):9-13.
[8]崔玉民,师瑞娟,李慧泉,等.催化剂Si O2/CNI的制备及其在光解水制氢领域中的应用[J].发光学报,2016,36(1):8-12.
[9]邱剑勋,王承遇,陶瑛,等.TiO2与ZnFe2O4薄膜禁带宽度测定及对光催化效率的影响[J].材料导报,2003,17(3):81-82.