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合成了三元复合材料β2-Si W11/PANI/Sn O2,并用IR、UV-Vis、XRD、XPS、氮气吸附-脱附和SEM等手段对其进行了表征。结果显示,复合后PANI红外振动峰发生红移,聚苯胺的加入一定程度上减少了纳米Sn O2的团聚,改善了其分散性,产物为介孔材料。UV-Vis光谱表明,复合后材料对可见光的响应显著增强。以龙胆紫为降解对象,研究了多种因素对光降解的影响。实验结果表明,三元催化剂β2-Si W11/PANI/Sn O2表现出比一元催化剂Sn O2、β2-Si W11和二元催化剂PANI/Sn O2更高的光降解性能,经30 W紫外灯照射90 min后,其降解率为90.28%,光催化降解龙胆紫为一级动力学反应。
The ternary composites β2-Si W11 / PANI / Sn O2 were synthesized and characterized by IR, UV-Vis, XRD, XPS, N2 adsorption-desorption and SEM. The results showed that the infrared peak of PANI redshifted after compounding, and the addition of polyaniline reduced the agglomeration of nano-SnO2 to a certain extent and improved its dispersion. The product was mesoporous material. UV-Vis spectra showed that the composite material significantly enhanced the response to visible light. Taking gentian violet as degradation target, the effects of various factors on photodegradation were studied. The experimental results show that β2-Si W11 / PANI / Sn O2 exhibits higher photodegradation performance than the monobasic catalysts Sn O2, β2-Si W11 and the binary catalyst PANI / Sn O2. min, the degradation rate was 90.28%. The photocatalytic degradation of gentian violet was a first-order kinetic reaction.