探索(CH3NH3)2AgInBr6(一种无铅过氧化物)及其与 MgAlTi 层状双氢氧化物的复合材料在空气净化方面的光催化性能

IF 7.4 2区 工程技术 Q1 ENGINEERING, CHEMICAL Journal of Environmental Chemical Engineering Pub Date : 2025-02-01 DOI:10.1016/j.jece.2024.114934
José Estrada-Pomares , María de los Ángeles Oliva , Luis Sánchez , Gustavo de Miguel
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The photocatalytic experiments reveal a high NO abatement of 92 % and 32 % under UV-Vis and visible irradiation, respectively. The cyclability of the MAIB material was investigated during six cycles obtaining an almost nearly constant performance. In a novel approach, the low selectivity showed by the MAIB perovskite in the DeNOx process was circumvented by the preparation of a composite with the MgAlTi layered double hydroxide (LDH). The presence of MgAlTi-LDH avoids the release of NO<sub>2</sub> during the photochemical oxidation of the NO gas. Under visible light, the MAIB perovskite is the active species leading to the production of superoxide radicals, which initiate the photochemical process. 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Exploring the photocatalytic performance of (CH3NH3)2AgInBr6, a Pb-free perovskite, and the composite with a MgAlTi layered double hydroxide for air purification purposes
Pb-free metal halide perovskites (MHPs) have lately been employed in different types of photocatalytic applications due to their high absorption in the visible region and excellent electrochemical properties. In this work, the In-based (CH3NH3)2AgInBr6 (MAIB) perovskite has been synthesized using a solvent-free mechanochemical method and the photocatalytic activity has been assessed in the NO removal reaction. The ball milling approach has been employed to obtain microcrystals with a high degree of crystallinity. The diffuse reflectance spectroscopy reveals a band gap energy of 3.44 eV but with an absorption tail covering the visible region. The photocatalytic experiments reveal a high NO abatement of 92 % and 32 % under UV-Vis and visible irradiation, respectively. The cyclability of the MAIB material was investigated during six cycles obtaining an almost nearly constant performance. In a novel approach, the low selectivity showed by the MAIB perovskite in the DeNOx process was circumvented by the preparation of a composite with the MgAlTi layered double hydroxide (LDH). The presence of MgAlTi-LDH avoids the release of NO2 during the photochemical oxidation of the NO gas. Under visible light, the MAIB perovskite is the active species leading to the production of superoxide radicals, which initiate the photochemical process. The MAIB/LDH composite exhibited good efficiency and outstanding selectivity to remove NO gas, together with long-term stability when irradiated under visible light.
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来源期刊
Journal of Environmental Chemical Engineering
Journal of Environmental Chemical Engineering Environmental Science-Pollution
CiteScore
11.40
自引率
6.50%
发文量
2017
审稿时长
27 days
期刊介绍: The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.
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