Bi/Mo摩尔比对钼酸铋可见光催化降解磺胺性能的影响
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摘要
以Bi(NO_3)_3·5H_2O和(NH_4)_6Mo_7O_(24)·4H_2O为原料,水热合成钼酸铋粉体。采用X-射线衍射、紫外可见漫反射光谱仪、比表面积分析仪对其表征。以磺胺溶液为目标降解物,评价了钼酸铋的光催化活性。结果表明:铋钼摩尔比对钼酸铋晶体的物相组成和光催化性能均有显著影响。当铋钼摩尔比为4时,制备得到的钼酸铋光催化性能最佳,磺胺溶液5 h降解率可以达到95%。
Bismuth molybdate powders were prepared by hydrothermal method using Bi(NO_3)_3·5 H_2O and(NH_4)_6Mo_7O_(24)·4 H_2O as raw materials.X-ray diffraction,ultraviolet visible diffuse reflectance spectrometer,and specific surface area analyzer was used to characterize the bismuth molybdatepowders.Thephotocatalytic performance was evaluated by thedegradation of target sulfanilamide solution.The results showed that the ratio of bismuth and molybdenum has influence on the phase composition and photocatalytic performance of bismuth molybdate crystallites.The optimal preparation conditions of the photocatalysts were obtained when the mole ratio of bismuth and molybdenum is 4,with the best degradation rate of sulfanilamide within 5 hours reached 95%.
Bismuth molybdate powders were prepared by hydrothermal method using Bi(NO_3)_3·5 H_2O and(NH_4)_6Mo_7O_(24)·4 H_2O as raw materials.X-ray diffraction,ultraviolet visible diffuse reflectance spectrometer,and specific surface area analyzer was used to characterize the bismuth molybdatepowders.Thephotocatalytic performance was evaluated by thedegradation of target sulfanilamide solution.The results showed that the ratio of bismuth and molybdenum has influence on the phase composition and photocatalytic performance of bismuth molybdate crystallites.The optimal preparation conditions of the photocatalysts were obtained when the mole ratio of bismuth and molybdenum is 4,with the best degradation rate of sulfanilamide within 5 hours reached 95%.
引文
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[3]Wu M,Wang Y,Xu Y,et al.Self-supported Bi2MoO6nanowall for photoelectrochemical water splitting[J].ACS Applied Material&Interfaces,2017,9,23647-23653.
[4]王敏,杨长秀,郑浩岩,等.pH值对Bi2MoO6晶体形貌和可见光催化性能的影响[J].无机化学学报,2015,31(2):309-316.
[5]张琴,汪晓凤,段芳,等.Bi2MoO6中空微球的制备及其光催化性能[J].无机化学学报,2015,31(11):2152-2158.
[6]杨自嵘,彭杰庭,韩玉琦,等.表面Cu2O纳米颗粒修饰高效促进γ-Bi2MoO6的可见光催化活性[J].物理化学学报,2013,29(4):813-820.
[7]Zhou F,Shi R,Zhu Y.Significant enhancement of the visible photocatalytic degradation performances of γ-Bi2MoO6 nanoplate by graphene hybridization[J].J Mol Catal A:Chem,2011,340(1-2):77-82.
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[9]林雪,郭晓宇,王庆伟,等.Bi2MoO6/BiVO4异质结的水热合成和可见光催化活性[J].物理化学学报,2014,30(11):2113-2120.
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