Zeng Hui-Hui, Xu Wen-Chao, Mei Jia-Bao, Yang Yao, Liu Fang, Yan Gen-Ping
College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China.
J Fluoresc. 2024 Nov 18. doi: 10.1007/s10895-024-04045-5.
Ce-based nanomaterials have been widely studied as catalyst for their unique electronic structure, but there are few reports on the combination of cerium catalytic activity and photoluminescence performance. In this paper, by adjusting the molar ratio of Ce/P, CeO/CePO nanocrystal were synthesized in one-step, which integrated the enzyme activities of CeO and CePO, as well as the optical property of CePO together. Taking HO as analyte model, utilizing the catalase oxidization activity of CeO/CePO, TMB molecule can be oxidized, leading to the increased absorption intensity of 652 nm, realizing the colorimetric assay of HO. On the other hand, using the fluorescence of CeO/CePO at 338 nm as output signal, which can be quenched by HO since Ce ions were oxidized into Ce, realizing HO fluorescence detection. Compared with the single-signal probe, CeO/CePO provides two sensing modes of fluorescence and colorimetry for HO discrimination to obtain different test results, which can be mutually verified and effectively improve the detection accuracy.
铈基纳米材料因其独特的电子结构而作为催化剂被广泛研究，但关于铈催化活性与光致发光性能相结合的报道却很少。本文通过调节Ce/P的摩尔比，一步合成了CeO/CePO纳米晶体，其整合了CeO和CePO的酶活性以及CePO的光学性质。以HO为分析物模型，利用CeO/CePO的过氧化氢酶氧化活性，可以氧化TMB分子，导致652nm处的吸收强度增加，实现HO的比色测定。另一方面，利用CeO/CePO在338nm处的荧光作为输出信号，由于Ce离子被氧化成Ce，该荧光可被HO淬灭，实现HO的荧光检测。与单信号探针相比，CeO/CePO为HO鉴别提供了荧光和比色两种传感模式以获得不同的测试结果，二者可相互验证并有效提高检测准确性。
