Crystalline cubic cerium oxide nano particles have been synthesized from cerium (III) nitrate (Ce (NO₃)₃.6H₂O) and sodium hydroxide by a hydrothermal method. The effect of three different molar ratios of the NaOH precipitating agent on structural, optical, and photo catalytic activity was investigated. The synthesized cerium oxide nano particles were characterized by X-ray diffraction (XRD), a UV–vis spectrometer, scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDAX), Raman spectroscopy and X-ray photo electron spectroscopy (XPS). According to the findings, hydrothermally synthesized cerium oxide NPs have a high efficiency for photocatalytic degradation of methylene blue when exposed to UV light. Environmental water pollution is the major issue of the atmosphere. To get fresh water, humans could search the resources to purify the water in simple way and degradation is the one of the methods to purify salt water.

中文翻译：

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水热法合成二氧化铈纳米光催化剂

_{由硝酸铈(III) (Ce (NO 3} ) ₃ .6H ₂ ) 合成结晶立方氧化铈纳米颗粒O) 和氢氧化钠的水热法。研究了三种不同摩尔比的 NaOH 沉淀剂对结构、光学和光催化活性的影响。采用X射线衍射(XRD)、紫外-可见光谱仪、扫描电子显微镜(SEM)、能量色散X射线光谱(EDAX)、拉曼光谱和X射线光电子能谱对合成的氧化铈纳米颗粒进行表征(XPS)。根据研究结果，水热合成的氧化铈纳米颗粒在暴露于紫外光时具有高效的亚甲基蓝光催化降解。环境水污染是大气的主要问题。为了获得淡水，人类可以通过简单的方式寻找资源来净化水，而降解是净化盐水的方法之一。