α-SiW_(11)Cu/PANI/ZnO复合催化剂的制备及光催化降解孔雀石绿研究
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摘要
以铜取代杂多酸盐α-SiW_(11)Cu为活性组分,制备了α-SiW_(11)Cu/聚苯胺(PANI)/ZnO三元复合催化剂,采用傅里叶变换红外光谱仪、紫外-可见分光光度计、X射线衍射仪、X射线光电子能谱仪和扫描电子显微镜表征了其结构,并以模拟污染物孔雀石绿的光催化降解评价了α-SiW_(11)Cu/PANI/ZnO的光催化性能。结果表明:在30W紫外灯照射下,当孔雀石绿溶液pH=3,孔雀石绿初始质量浓度为10mg/L,复合催化剂投加量为20mg/L,照射时间为200min时,脱色率可达83.78%。光催化降解孔雀石绿过程符合一级动力学方程,一级方程表观反应速率常数为0.00917min~(-1)。
The ternary composite catalystα-SiW_(11)Cu/PANI/ZnO was prepared and characterized by FT-IR,UV-Vis,XRD and SEM.The photocatalytic degradation of malachite green was selected as probe to evaluate the enhanced photocatalytic activity of as-synthesizedα-SiW_(11 )Cu/PANI/ZnO.Experimental results showed that the decoloration efficiency of malachite green was achieved 83.78%when 10mg/L of malachite green containing simulated solution at pH 3was treated by 30Wultraviolet light with 20mg/L ofα-SiW_(11)Cu/PANI/ZnO as catalyst.The kinetics of photodegradation of malachite green was satisfied by the pseudo-first-order equation,with a constant at 0.00917min~(-1).
The ternary composite catalystα-SiW_(11)Cu/PANI/ZnO was prepared and characterized by FT-IR,UV-Vis,XRD and SEM.The photocatalytic degradation of malachite green was selected as probe to evaluate the enhanced photocatalytic activity of as-synthesizedα-SiW_(11 )Cu/PANI/ZnO.Experimental results showed that the decoloration efficiency of malachite green was achieved 83.78%when 10mg/L of malachite green containing simulated solution at pH 3was treated by 30Wultraviolet light with 20mg/L ofα-SiW_(11)Cu/PANI/ZnO as catalyst.The kinetics of photodegradation of malachite green was satisfied by the pseudo-first-order equation,with a constant at 0.00917min~(-1).
引文
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[3]Xin B,Jing L,Ren Z,et al.Effects of simultaneously doped and deposited Ag on the photocatalytic activity and surface states of TiO2[J].Journal of Physical Chemistry B,2005,109(7):2805-2809.
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[7]邹晓梅,陈艳,朱兴旺,等.Keggin型铬取代的磷钨杂多阴离子/二氧化钛纳米膜光催化剂的制备及可见光催化性能[J].应用化学,2016,33(3):321-329.
[8]马荣华,程惠,邸继鹏,等.β2-SiW11Cr/PANI光催化剂制备、表征及光催化性能研究[J].化工新型材料,2017,45(6):214-2168.
[9]马荣华,苏宁,高垒.β2-SiW11/PANI/SnO2三元复合催化剂的制备及光催化性能[J].化工新型材料,2015,43(3):35-37.
[10]马荣华,刘春涛.杂多配合物异构体[M].哈尔滨:哈尔滨工程大学出版社,2001:21-24.
[11]才红,陈艳,谢绍坚.纳米氧化锌的制备和表面改性[J].无机盐工业,2010,42(6):24-26.
[12]吴镇玉,李奉杰,李村,等.ZnO-聚苯胺纳米复合材料的制备及光催化性质[J].无机化学学报,2013,29(10):2091-2098.
[13]Ma Ronghua.Synthesis and properties of polyaniline doped with iron-substituted silicotungstate isomers with Keggin structure[J].Journal of Coordination Chemistry,2008,61(7):1056-1065.