Photocatalysis Laboratory, Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Nov;115:876-82. doi: 10.1016/j.saa.2013.06.106. Epub 2013 Jul 6.
The SnO2 loaded ZnO (SnO2-ZnO) was successfully synthesized by precipitation-decomposition method. The catalyst was characterized by X-ray diffraction (XRD), high resolution scanning electron microscope (HR-SEM) images, energy dispersive spectrum (EDS), diffuse reflectance spectra (DRS), photoluminescence spectra (PL) and BET surface area measurements. The photocatalytic activity of SnO2-ZnO was investigated for the degradation of Acid Orange 10 (AO 10) in aqueous solution using UV-A light. SnO2-ZnO is found to be more efficient than commercial ZnO, bare ZnO, TiO2-P25 and TiO2 (Merck) at pH 12 for the mineralization of AO 10 dye. The effects of operational parameters such as the amount of photocatalyst, dye concentration, initial pH on photo mineralization of AO 10 dye have been analyzed. The mineralization of AO 10 has been confirmed by chemical oxygen demand (COD) measurements. A degradation mechanism is proposed for the degradation of AO 10 with SnO2-ZnO under UV-A light. This catalyst is found to be reusable.
通过沉淀-分解法成功合成了负载 SnO2 的 ZnO（SnO2-ZnO）。采用 X 射线衍射（XRD）、高分辨率扫描电子显微镜（HR-SEM）图像、能谱（EDS）、漫反射光谱（DRS）、光致发光光谱（PL）和 BET 比表面积测量对催化剂进行了表征。使用 UV-A 光研究了 SnO2-ZnO 对水溶液中酸性橙 10（AO 10）的降解的光催化活性。在 pH 12 下，SnO2-ZnO 比商业 ZnO、裸 ZnO、TiO2-P25 和 TiO2（Merck）更有效地矿化 AO 10 染料。分析了操作参数（如催化剂用量、染料浓度、初始 pH 值）对 AO 10 光矿化的影响。通过化学需氧量（COD）测量证实了 AO 10 的矿化。提出了在 UV-A 光下用 SnO2-ZnO 降解 AO 10 的降解机理。该催化剂被发现可重复使用。
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