改善可见光下Co3O4/MoS2/TiO2三元复合材料光催化降解染料性能

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-03-05 DOI:10.1016/j.jtice.2025.106062

N. Elavarasan , Gopal Venkatesh , Govindasami Periyasami , Kiky Corneliasari Sembiring , Jintae Lee , Govindasamy Palanisamy

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引用次数: 0

摘要

本研究旨在合成一种新型三元纳米杂化材料Co3O4/MoS2/TiO2 (CMT)，以增强光催化降解亚甲基蓝（MB）的能力。传统光催化剂的效率往往有限，因此整合Co3O4、MoS2和TiO2旨在通过改善电荷转移和电子-空穴（e⁻/h⁺）对的分离来克服这些挑战。方法采用煅烧法和水热法制备CMT纳米复合材料。采用各种光谱和显微技术对CMT纳米复合材料进行表征，并通过测试其光催化活性来评价其对MB的降解效率。动力学研究也进行了评估反应速率，而材料的稳定性测试了五个降解周期。CMT纳米复合材料表现出优异的光催化性能，对MB的降解率达到94.77%，优于其他材料。反应速率常数为0.0181 min - 1，比其他样品高4.02倍。Co3O4和其他组分之间增强的电荷转移有助于e⁻/h⁺对高效分离。光催化剂在多次使用中保持稳定，并且在MB降解过程中，超氧自由基（•O2⁻）被确定为主要的反应物质，突出了材料的效率和耐用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Ameliorative photocatalytic dye degradation performance of ternary Co3O4/MoS2/TiO2 nanocomposite under visible light illumination

查看原文本刊更多论文

Ameliorative photocatalytic dye degradation performance of ternary Co3O4/MoS2/TiO2 nanocomposite under visible light illumination

Background

This research aimed to synthesize a novel ternary nanohybrid material, Co₃O₄/MoS₂/TiO₂ (CMT), to enhance photocatalytic degradation of methylene blue (MB) under light irradiation. Conventional photocatalysts often suffer from limited efficiency, so integrating Co₃O₄, MoS₂ and TiO₂ aimed to overcome these challenges by improving charge transfer and separation of electron-hole (e⁻/h⁺) pairs.

Methods

The CMT nanocomposites were synthesized using calcination and hydrothermal methods. Various spectroscopic and microscopic techniques were employed to characterize the CMT nanocomposites, and their photocatalytic activity was evaluated by testing MB degradation efficiency. Kinetic studies were also performed to assess the reaction rate, while the material's stability was tested over five degradation cycles.

Significant findings

The CMT nanocomposites demonstrated remarkable photocatalytic performance, achieving 94.77 % MB degradation, outperforming other materials. The kinetic rate constant was 0.0181 min⁻¹, 4.02 times higher than alternative samples. Enhanced charge transfer between Co₃O₄ and the other components contributed to efficient e⁻/h⁺ pair separation. The photocatalyst remained stable over repeated use, and superoxide radicals (•O₂⁻) were identified as the dominant reactive species during MB degradation, highlighting the material's efficiency and durability.

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.