乙二胺四乙酸二钠蚀刻Cr：ZnGa 2 O 4的余辉催化和污染物的自我报告,The Journal of Physical Chemistry C

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乙二胺四乙酸二钠蚀刻Cr：ZnGa ₂ O _4的余辉催化和污染物的自我报告
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-04-26 , DOI: 10.1021/acs.jpcc.1c00999
Ye Zhang ₁ , Zheng-Wu Wang ₁ , Xia Ji ₁ , Ting Wang ₁ , Xiao-Ting Yang ₁ , He-Fang Wang ₁

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通过持久发光乙二胺四乙酸二钠（EDTA）蚀刻的Cr ³⁺掺杂的ZnGa ₂ O ₄（ZGO-EDTA），实现了污染物降解的余辉催化和光致发光（PL）自报告。余辉催化解决了传统光催化对连续照明的过度依赖，使污染物降解可以在任何地方，任何时间进行，尤其是在黑暗环境中。自我报告的特性可以准确确定实时降级效率，而无需进行耗时的测试。系统研究了Cr ³⁺掺杂和EDTA蚀刻对这些功能和性能的影响。Cr ^3+均掺杂和EDTA蚀刻改善了可见光可激活的余辉，而EDTA蚀刻减小了粒径，提高了水分散性，扩大了表面积，并产生了氧空位，从而减慢了光载体的重组并延长了余辉的持续时间，所有这些都有助于改善余辉催化和污染物降解的PL自报告。通过将实验结果与密度泛函理论计算相结合，讨论了相关的机理。PL自报告和余辉降解都有潜力在比传统方法更广泛的情况下广泛应用于催化，环境分析和保护以及废物处理的过程分析中。

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Afterglow-Catalysis and Self-Reporting of Pollutant Degradation by Ethylenediaminetetraacetic Acid Disodium-Etched Cr:ZnGa2O4

Both afterglow-catalysis and photoluminescence (PL) self-reporting of pollutant degradation are achieved by persistent luminescent ethylenediaminetetraacetic acid disodium (EDTA)-etched Cr³⁺-doped ZnGa₂O₄ (ZGO-EDTA). Afterglow-catalysis resolves the overdependence of traditional photocatalysis on continuous lighting, enabling pollutant degradation to proceed anywhere and at any time, in particular in dark environments. The self-reporting property allows the accurate determination of real-time degradation efficiency without the need for time-consuming tests. The effects of Cr³⁺-doping and EDTA-etching on those functions and properties were systematically investigated. Both Cr³⁺-doping and EDTA-etching improve the visible-light activatable afterglow, while EDTA-etching decreases the particle size, improves aqueous dispersibility, enlarges the surface area, and generates oxygen vacancies to slow down the recombination of photocarriers and prolong the duration of the afterglow, all of which contribute to the improved afterglow-catalysis and PL self-reporting of pollutant degradation. The related mechanism is discussed by combining experimental results with density functional theory calculations. Both PL self-reporting and afterglow-degradation have the potential to be widely deployed in the processing analysis of catalysis, environmental analysis and protection, and waste treatment, in a wider range of situations than was traditionally possible.

更新日期：2021-05-06

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