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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Catalytic Decomposition of Hypochlorite Anions by Ceria Nanoparticles Visualized by Spectroscopic Techniques
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Catalytic Decomposition of Hypochlorite Anions by Ceria Nanoparticles Visualized by Spectroscopic Techniques

机译：光谱技术可视化的催化分解次氯酸盐阴离子

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摘要

Hypochlorous acid (HOCl) and hypochlorite anions (-OCl) are nonselective oxidants produced by activated neutrophils and monocytes and play an important role in the formation of immune response of a living organism. At the same time, because of the strong oxidative properties of hypochlorites, their concentrations in cells need to be under strict control. In this paper, cerium oxide nanoparticles (nanoceria) were used for spectroscopically controlled catalytic decomposition of hypochlorite anions. The processes of scavenging of hypochlorite anions by ceria nanoparticles and regeneration of nanoceria were monitored using the changes in hypochlorite absorption and 5d -> 4f luminescence of Ce3+ ions during oxidation-reduction cycles. The high oxygen deficiency of ceria nanoparticles provides sufficient mobility of oxygen ions, leading to the involvement of both surface and bulk Ce3+ ions into oxidation, whereas the recovery of initial Ce3+/Ce4+ ratio is terminated by the slow diffusion of oxygen out of ceria nanoparticles.
机译：次氯酸（HOCL）和次氯酸盐阴离子（-OCL）是由活化的嗜中性粒细胞和单核细胞产生的非选择性氧化剂，并在生物体的免疫应答的形成中起重要作用。同时，由于次氯酸盐的强氧化性能，它们在细胞中的浓度需要受到严格的控制。本文使用氧化铈纳米粒子（纳米粒子）用于光谱控制次氯酸盐阴离子的催化分解。使用CE3 +离子在氧化还原循环期间CE3 +离子的次氯酸盐吸收和4F发光的变化监测通过CE3氯酸盐吸收和5d-> 4F发光的变化监测CE3 +离子的5D-> 4F发光的过程中缩放次氯酸盐阴离子的过程。 Ceria纳米颗粒的高氧缺氧提供了足够的氧离子的迁移率，导致两种表面和块状CE3 +离子的累及涉及氧化，而初始CE3 + / CE4 +比的回收率通过氧气纳米颗粒的缓慢扩散终止。

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