一种新型的Ag@α-Fe2O3/NiCo层状双氢氧化物纳米复合材料在可见光和日光下具有优异的光催化降解孔雀石绿染料

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-04-30 DOI:10.1016/j.jtice.2025.106151

Jemini, Satnam Singh, Bonamali Pal

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引用次数: 0

摘要

本研究旨在通过与Fe2O3形成复合材料，并通过Ag负载提高其可见光响应性来提高NiCo层状双氢氧化物（LDH）的光催化效率。目的是扩大NiCo LDH的光吸收范围，提高其光催化性能，用于环境净化，特别是降解有机污染物。方法采用Fe2O3纳米粒子（NPs）增强可见光响应，Ag纳米粒子（NPs）通过表面等离子体效应提高光催化效率，合成了二元NiCo/Fe2O3和三元Ag3@10Fe2O3/NiCo LDH （NCF10A3 LDH）复合材料。通过在可见光和日光下降解孔雀石绿（MG）染料，测试了复合材料的光催化活性。采用XRD、DRS、FTIR、HR-TEM和FE-SEM对其结构、光学和形貌进行了表征。重要发现：三元复合材料（NCF10A3 LDH）表现出更好的光催化性能，在可见光下的降解率为81.2% （k = 1.25 × 10−2 min⁻¹），在阳光下的降解率为98.6% （k = 3.33 × 10−2 min⁻¹）。NiCo LDH的带隙从2.40 eV减小到1.74 eV，提高了性能。提出了基于HR-MS片段的降解途径，催化剂表现出优异的耐久性，保持稳定，可重复使用达5次。

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A novel Ag@α-Fe2O3/NiCo layered double hydroxide nanocomposite for superior photocatalytic degradation of malachite green dye under visible and sunlight

Background

This study aimed to enhance the photocatalytic efficiency of NiCo layered double hydroxide (LDH) by forming composites with Fe₂O₃ and improving its visible light responsiveness through Ag loading. The goal was to expand the light absorption range of NiCo LDH and enhance its photocatalytic performance for environmental cleanup, particularly in degrading organic pollutants.

Methods

The researchers synthesized binary NiCo/Fe₂O₃ and ternary Ag₃@10Fe₂O₃/NiCo LDH (NCF10A₃ LDH) composites by incorporating Fe₂O₃ nanoparticles (NPs) for enhanced visible light response and Ag NPs for improved photocatalytic efficiency via the surface plasmonic effect. The composites’ photocatalytic activity was tested by degrading malachite green (MG) dye under both visible light and sunlight. The structural, optical, and morphological properties were characterized using XRD, DRS, FTIR, HR-TEM, and FE-SEM.

Significant findings

The ternary composite (NCF10A₃ LDH) demonstrated improved photocatalytic performance, achieving 81.2 % degradation (k = 1.25 × 10⁻² min⁻¹) under visible light and 98.6 % degradation (k = 3.33 × 10⁻² min⁻¹) under sunlight. The band gap of NiCo LDH reduced from 2.40 eV to 1.74 eV, enhancing performance. The degradation pathway was proposed based on HR-MS fragments, and the catalyst showed excellent durability, remaining stable and reusable for up to five cycles.

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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.