β_2-SiW_(11)Ti/PANI/ZnO复合材料的制备及光催化性能
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摘要
用静电自组装法合成了三元复合材料β_2-SiW_(11)Ti/PANI/ZnO,并用红外光谱、紫外光谱、XRD、SEM进行表征,研究了该催化材料对孔雀石绿降解的催化活性。讨论了催化剂投加量、孔雀石绿溶液的初始浓度、p H对催化降解效果的影响。结果表明,当溶液p H为1、催化剂用量为0.001 g、孔雀石绿初始浓度为10 mg/L,在30 W紫外灯下照射180 min,脱色率可达95.55%。与一元催化剂β2-Si W11Ti、β2-Si W11和二元催化剂PANI/ZnO比较,三元催化剂β_2-SiW_(11)Ti/PANI/ZnO表现出更高的光催化降解性能,光催化降解孔雀石绿为一级动力学反应。
The ternary composites β2-Si W11 Ti/PANI/Zn O was prepared by electrostatic self-assembly method.The samples was characterized by IR,UV,XRD and SEM techniques.Photocatalytic activities of β2-Si W11 Ti/PANI/Zn O were investigated by degradation of malachite green solution.The effects of the amount of catalyst,initial concentration of malachite green and p H of solution on decolorizing efficiency were discussed.The results showed that the p H value is 1,the amount of catalyst is 0.001 g,the initial concentration of malachite green was 10 mg/L,the decolorization rate was 95.55% under 30 W ultraviolet light for 180 min.Compared with β2-Si W11 Ti,β2-Si W11 and PANI/Zn O,the ternary composite photocatalyst of β2-Si W11 Ti/PANI/Zn O showed higher photocatalytic performance.The reaction of photocatalytic degradation of malachite green with β2-Si W11 Ti/PANI/Zn O follows the first-order reaction kinetics.
The ternary composites β2-Si W11 Ti/PANI/Zn O was prepared by electrostatic self-assembly method.The samples was characterized by IR,UV,XRD and SEM techniques.Photocatalytic activities of β2-Si W11 Ti/PANI/Zn O were investigated by degradation of malachite green solution.The effects of the amount of catalyst,initial concentration of malachite green and p H of solution on decolorizing efficiency were discussed.The results showed that the p H value is 1,the amount of catalyst is 0.001 g,the initial concentration of malachite green was 10 mg/L,the decolorization rate was 95.55% under 30 W ultraviolet light for 180 min.Compared with β2-Si W11 Ti,β2-Si W11 and PANI/Zn O,the ternary composite photocatalyst of β2-Si W11 Ti/PANI/Zn O showed higher photocatalytic performance.The reaction of photocatalytic degradation of malachite green with β2-Si W11 Ti/PANI/Zn O follows the first-order reaction kinetics.
引文
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[4]朱秀华,王炜,李海成.磷钨酸光催化降解染料废水研究[J].上海环境科学,2001,20(9):444-450.
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[6]JIANG Wei-ting,WU Chun-te,SUNG Y H,et al.Roomtemperature fast construction of out performed Zn O nanoarchitectures on nanowire-array templates for dye-sensitized solar cells[J].ACS Appl.Mater.Interf.,2013,5(3):911-917.
[7]吴镇玉,李奉杰,李村,等.Zn O-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.
[8]邓艳玲,马荣华.PW12/PANI/Zn O复合材料光催化降解亚甲基蓝[J].广州化工,2014,42(10):77-79.
[9]马荣华,苏宁,高垒.β2-Si W11/PANI/Sn O2三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,房武祥.PMOV2/PANI/Ti O2复合材料的制备及光催化性能[J].化工新型材料,2012,40(12):28-30.
[11]马荣华,马玲,瞿伦玉.钛取代的钨硅杂多配合物位置异构体的合成、表征及催化性能[J].应用化学,2004,21(3):56-60.
[12]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.
[13]MA Rong-hua.Synthesis and properties of polyaniline doped with iron-substituted silicotungstate isomers with Keggin structure[J].J.Coord.Chem.,2008,61(7):1 056-1 065.