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Photocatalytic properties of nanosized zinc ferrite and zinc chromite
Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2021-02-19 , DOI: 10.1088/2043-6254/abde3b
N P Shabelskaya 1 , M A Egorova 1 , E V Vasileva 1 , O E Polozhentsev 2
Affiliation  

A simple one-step synthesis of developed surface zinc ferrite is proposed (S BET=453.1 m2 g−1). The formation of zinc ferrite, zinc chromite (S BET=53.6 m2 g−1), and mixed zinc ferrite-chromite (S BET=37.4 m2 g−1) structures is studied. The resulting materials are analysed using x-ray phase and x-ray fluorescence analysis, IR spectrometry, electron microscopy, TGA and BET method. Single-phase sample formation mechanism is proposed, which includes transition element cation chelate complex formation stage in the presence of citric acid and subsequent thermal decomposition of the complexes formed. The synthesised materials exhibited photocatalytic activity in the decomposition of an organic dye under the action of hydrogen peroxide. The highest catalytic activity is demonstrated by zinc ferrite in acidic medium; the calculated reaction rate constant is 0.010 min−1 for ZnFe2O4, 0.008 min−1 for ZnFeCrO4, 0.007 min−1 for ZnCr2O4. The results can be applied to obtain materials suitable for wastewater treatment processes at industrial enterprises where organic dyes are used in production cycles.



中文翻译:

纳米铁酸锌和亚铬酸锌的光催化性能

提出了一种简单的一步法合成发达的表面锌铁氧体的方法(S BET = 453.1 m 2 g -1)。铁酸锌,亚铬酸锌(S BET = 53.6 m 2 g -1)和混合亚铁酸锌-亚铬酸盐(S BET = 37.4 m 2 g -1)的形成)结构进行了研究。使用X射线相和X射线荧光分析,IR光谱,电子显微镜,TGA和BET法分析所得材料。提出了单相样品形成机理,该机理包括在柠檬酸存在下过渡元素阳离子螯合配合物的形成阶段以及随后形成的配合物的热分解。合成的材料在过氧化氢的作用下在有机染料的分解中表现出光催化活性。铁酸锌在酸性介质中显示出最高的催化活性。计算得出的反应速率常数对于ZnFe 2 O 4为0.010 min -1,对于ZnFeCrO 4为0.008 min -1,为0.007 minZnCr 2 O 4-1。该结果可用于获得适用于工业企业在生产周期中使用有机染料的废水处理工艺的材料。

更新日期:2021-02-19
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