Abstract Using (NH4)2S2O8 as an oxidant and 12-phosphotungstic acid as a doping agent, the ternary composite material PW12/PANI/SnO2 was prepared. The photocatalyst was characterized by FT-IR, XRD, UV-Vis, N2 adsorption-desorption tests, SEM and XPS techniques. The PANI additive was useful to reduce the agglomeration of nanoparticles and improve the dispersion because of hydrogen bonding between PANI and SnO2. XRD image showed that SnO2 has planar orientation and purity. The photocatalytic activities of the composite were investigated for the degradation of gentian violet as a probe under illumination with UV. The effect of different factors and different conditions for gentian violet is discussed. Results show that after 30 W UV irradiation, the degradation rate is 96.23%. The composite catalyst is better than SnO2, PW12 and SnO2/PANI with higher activity. Photocatalytic degradation of gentian violet is a first-order reaction.

中文翻译：

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三元复合光催化剂12-磷钨酸/PANI/SnO2的制备及光催化动力学研究

摘要 以(NH4)2S2O8为氧化剂，12-磷钨酸为掺杂剂，制备了三元复合材料PW12/PANI/SnO2。通过FT-IR、XRD、UV-Vis、N2吸附-解吸测试、SEM和XPS技术对光催化剂进行了表征。由于 PANI 和 SnO2 之间存在氢键，因此 PANI 添加剂可用于减少纳米颗粒的团聚并改善分散性。XRD 图像显示 SnO2 具有平面取向和纯度。研究了复合材料的光催化活性，用于在紫外线照射下降解龙胆紫作为探针。讨论了不同因素和不同条件对龙胆紫的影响。结果表明，30 W紫外线照射后，降解率为96.23%。复合催化剂优于SnO2，PW12 和 SnO2/PANI 具有更高的活性。龙胆紫的光催化降解是一级反应。