Ag-ZnO/PANI nanocomposite was prepared via the sol-gel technique following in situ oxidative polymerization of polyaniline (PANI). XRD, UV-Vis, and FT-IR spectroscopy were employed to study the crystal size, bandgap energy, and bond structure of as-synthesized nanocomposites. The mean crystallite size of the nanocomposite determined from XRD was 35.68 nm. Photocatalytic degradation of malachite green (MG) dye using as-synthesized photocatalysts was studied under visible light irradiation. The highest degradation efficiency was recorded for Ag-ZnO/PANI nanocomposites (98.58%) than Ag-ZnO nanoparticles (88.23%) in 120 min. The kinetics of photocatalytic degradation of MG follows pseudo-first-order reaction with rate order of 1.16 10⁻² min⁻¹. Moreover, the photocatalytic activity of Ag-ZnO/PANI nanocomposites was evaluated and compared with Ce-Cd oxide, electrospun P(3HB)-TiO2, and with other catalysts in the literature. The optimal conditions for photocatalytic degradation are as follows: the concentration of malachite green (0.2 g/l), pH (8), and the concentration of catalyst load (0.2 g/l) under visible light with an irradiation time of 120 min.

中文翻译：

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聚苯胺负载的掺银氧化锌纳米复合材料：孔雀石绿光催化降解的合成、表征和动力学研究

Ag-ZnO/PANI 纳米复合材料是通过聚苯胺 (PANI) 的原位氧化聚合通过溶胶-凝胶技术制备的。XRD、UV-Vis 和 FT-IR 光谱用于研究合成的纳米复合材料的晶体尺寸、带隙能量和键结构。由 XRD 确定的纳米复合材料的平均微晶尺寸为 35.68 nm。在可见光照射下研究了使用合成光催化剂对孔雀石绿 (MG) 染料的光催化降解。在 120 分钟内，Ag-ZnO/PANI 纳米复合材料（98.58%）的降解效率高于 Ag-ZnO 纳米颗粒（88.23%）。MG的光催化降解动力学遵循准一级反应，速率为1.16 10 ^-2  min ^-1. 此外，还评估了 Ag-ZnO/PANI 纳米复合材料的光催化活性，并与 Ce-Cd 氧化物、电纺 P(3HB)-TiO2 以及文献中的其他催​​化剂进行了比较。光催化降解的最佳条件为：孔雀石绿浓度（0.2 g/l）、pH（8）、可见光下催化剂负载浓度（0.2 g/l），照射时间为120 min。