Heterogeneous photocatalysis is found an effective technique for degradation of organic pollutants in wastewater breaking them into smaller fragment of molecules that can easily be biodegraded further. Present work comprises of photocatalytic degradation of Crystal Violet dye (CV) which is found more resistant and more stable and so generates toxicity in the environment. A novel quaternary metal oxide is synthesized for this purpose and is characterized by various analytical techniques. XRD is carried out to obtain the crystal structure, EDX is carried to know about the elements present in the material, XPS is carried to know the oxidation states of the elements, FE-SEM is done for getting the crystal arrangements and morphology of the material. Combined results of these analyses suggest the formula of prepared material to be ZrCdPbO₄. Further UV-Vis analysis is used to calculate the band gap which comes out to be 5eV. This material is then used as photocatalyst for degradation of CV in heterogeneous conditions. A kinetic study is carried and it is observed that the reaction follows pseudo first order rate law. Optical density is recorded and different factors are varied to obtain optimum conditions for maximum degradation.

中文翻译：

---

可见光驱动光催化降解有机污染物：用新型 ZrCdPbO4 清洁环境

多相光催化被发现是一种有效的技术，可以降解废水中的有机污染物，将它们分解成更小的分子碎片，这些碎片很容易被进一步生物降解。目前的工作包括对结晶紫染料 (CV) 进行光催化降解，发现这种染料更具抵抗力和稳定性，因此在环境中会产生毒性。为此目的合成了一种新型季金属氧化物，并通过各种分析技术对其进行了表征。XRD得到晶体结构，EDX得到材料中存在的元素，XPS得到元素的氧化态，FE-SEM得到材料的晶体排列和形貌. 这些分析的综合结果表明所制备材料的分子式为 ZrCdPbO₄ . 进一步的 UV-Vis 分析用于计算带隙，结果为 5eV。然后将该材料用作光催化剂，用于在非均相条件下降解 CV。进行动力学研究并观察到反应遵循伪一级速率定律。记录光密度并改变不同的因素以获得最大降解的最佳条件。