化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (12) : 197-202. DOI: 10.19817/j.cnki.issn1006-3536.2024.12.021

科学研究

微球状C-TiO₂/Fe₃O₄的制备及其降解亚甲基蓝的性能研究

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Preparation of microspherical C-TiO₂/Fe₃O₄ and its property in degrading methylene blue

Jing Yiqi, Li Yongzhuo, Wang Ruijuan

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Received		Published
2023-10-27		2024-12-20
Issue Date	Revised Date
2024-12-12	2023-10-27

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摘要

采用溶剂热法合成微球状C-TiO₂/Fe₃O₄光催化剂,并利用扫描电子显微镜(SEM)和X射线衍射(XRD)对其形貌和结构进行表征。以亚甲基蓝(MB)为降解目标,探讨Fe₃O₄含量、反应时间、催化剂质量、染料初始浓度以及溶液pH等因素对其吸附和光催化性能的影响,并探究了其循环再生能力、催化动力学过程以及反应机制。结果表明:当Fe₃O₄含量为2.5%,合成的C-TiO₂/Fe₃O₄形貌以直径为3.41μm成的球为主;在紫外光照射下,当0.1g C-TiO₂/Fe₃O₄光催化剂降解25mg/L MB染料时,其催化效果良好,催化效率在90min可达57.35%;与此同时,·OH在该催化中起主要作用,空穴和超氧自由基不起作用或者其作用很微弱。

Abstract

The microspherical C-TiO₂/Fe₃O₄ photocatalyst was synthesized through solvothermal method,and the morphology and the structure of the product were characterized by SEM and XRD.With methylene blue (MB) as the degradation target,the influence of the content of Fe₃O₄,photocatalytic time,catalyst quality,initial dye concentration and solution pH on the adsorption and photocatalytic performance were explored.Its recycle and regeneration ability,catalytic kinetic process and degradation mechanism were also investigated.The results showed that when the content of Fe₃O₄ was 2.5%,the morphology of as-synthesized C-TiO₂/Fe₃O₄ was dominated by microspheres with the diameter of 3.41μm.Under UV irradiation,when the mass of 0.1g C-TiO₂/Fe₃O₄ was used to degrade 25mg/L MB solution,the catalyst demonstrated good performance,achieving a catalyst efficiency of 57.35% at 90min.In addition,it was found that ·OH played a major role in the photocatalytic process of MB degraded by C-TiO₂/Fe₃O₄,but the h⁺ and superoxide radicals had little or no effect.

关键词

微球状C-TiO₂/Fe₃O₄ / 光催化性能 / 吸附

Key words

microspherical C-TiO₂/Fe₃O₄ / photocatalytic activity / adsorption

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微球状C-TiO₂/Fe₃O₄的制备及其降解亚甲基蓝的性能研究[J]. 化工新型材料, 2024, 52(12): 197-202 DOI:10.19817/j.cnki.issn1006-3536.2024.12.021

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