Ce³⁺ ion doped BiPO₄ phosphors were synthesized by co‐precipitation method using ethylene glycol as capping agent. The prepared phosphors were characterized by XRD, SEM, FT‐IR, UV‐Vis, and PL spectroscopy techniques. The formation of monoclinic phase was confirmed from XRD and FT‐IR studies. SEM study revealed the rice shape morphology of BiPO₄:Ce³⁺ (7at.%). In the photoluminescence analysis, a broad emission band extending in a wide wavelengths range with maxima around 419 and 470 nm was observed under excitation at 370 and 417 nm, respectively. These emission bands are originated from the electronic transitions, viz., 5d → ²F_5/2, ²F_7/2 of Ce³⁺ ion. The emission intensity was accentuated with the increase of Ce³⁺ ion till 7at.% and subsequently attenuated with further increase of Ce³⁺ ion concentration; which is due to the concentration quenching effect. The BiPO₄:Ce³⁺ (7at.%) sample was characterized for the feasibility of photocatalytic degradation of methylene blue under UV light irradiation and degradation of 90% of the dye was degraded within 120 minutes was observed. From the results, it is believed that the prepared BiPO₄:Ce³⁺ may have potential applications in solid state lighting as well as in photocatalysis for the degradation of organic dyes.

中文翻译：

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Ce3 +离子掺杂BiPO4荧光粉的光致发光研究及其光催化活性

以乙二醇为封端剂，通过共沉淀法合成了Ce ³⁺掺杂BiPO ₄荧光粉。制备的磷光体通过XRD，SEM，FT-IR，UV-Vis和PL光谱技术进行了表征。XRD和FT-IR研究证实了单斜晶相的形成。SEM研究显示BiPO ₄：Ce ³⁺（7at。％）的大米形状。在光致发光分析中，分别在370和417nm激发下观察到在最大波长范围为419和470nm附近的宽发射带。这些发射带起源于电子跃迁，即，图5d→  ² ˚F _5/2，² ˚F _7/2Ce ³⁺离子。随着Ce ³⁺离子的增加直到7at。％，发射强度增强，随后随着Ce ³⁺离子浓度的进一步增加而减弱。这是由于浓度淬灭作用。对BiPO ₄：Ce ³⁺（7at。％）样品进行了表征，证明其在紫外光照射下可对亚甲基蓝进行光催化降解，并观察到90％的染料在120分钟内降解。从结果可以相信，制备的BiPO ₄：Ce ³⁺可能在固态照明以及光催化降解有机染料方面具有潜在的应用。