In this study, we successfully synthesized ZnO/CeO2 composite nanoparticles for efficient ultraviolet (UV) filtering applications using a simple precipitation route. Various ratios of Ce/Ti, 2.5 at.%, 5 at.%, and 10 at.% were used to precipitate ceria onto commercial ZnO nanopowder at pH 9. The calculated mean crystallite sizes of the resultant nanocomposites were ~ 90 nm, ~ 79 nm, and ~ 41 nm for the 2.5 at.%, 5 at.% and 10 at.% ceria amounts, respectively. A stronger and more selective absorbance within the UV range was observed due to precipitation of a small amount of ceria to decorate the commercial ZnO surface. The photocatalyst results show that the addition of ceria, particularly with the precipitation amount increased up to 10 at.%, can effectively reduce crystal violet degradation by about 97% in a period of time from 0 to 30 min when exposed to ultraviolet light over 30 min or by around 99% under solar simulation for 30 min.

中文翻译：

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具有低光催化活性的 ZnO/CeO2 纳米复合材料作为高效的紫外线过滤器

在这项研究中，我们使用简单的沉淀路线成功合成了 ZnO/CeO2 复合纳米粒子，用于高效过滤紫外线 (UV)。使用不同比例的 Ce/Ti、2.5 at.%、5 at.% 和 10 at.% 在 pH 9 下将氧化铈沉淀到商业 ZnO 纳米粉末上。所得纳米复合材料的计算平均微晶尺寸为 ~ 90 nm，~对于 2.5 at.%、5 at.% 和 10 at.% 氧化铈量，分别为 79 nm 和 ~ 41 nm。由于少量二氧化铈的沉淀以装饰商业 ZnO 表面，因此在 UV 范围内观察到更强和更具选择性的吸光度。光触媒结果表明，随着氧化铈的加入，特别是随着沉淀量增加到10at.%，