ZnAl-MMO, synthesized with Al extracted from saline slags, combined with carbon nitride and gold nanoparticles for the catalytic photodegradation of antibiotic norfloxacin

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering Pub Date : 2025-09-12 DOI:10.1016/j.jece.2025.119255

L. Santamaría , S.A. Korili , A. Gil , J.M. López-de-Luzuriaga , M. Monge

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Abstract

Mixed metal oxides (MMO) formed from Zinc-Aluminum Layered Double Hydroxides (LDH), synthesized with Al extracted from saline slags, were combined with carbon nitride with a simple vapor deposition method, to form 2D/2D heterostructured photocatalysts. Two calcination temperatures were tested for the synthesis of MMO (520 and 850 °C) and their performance was tested for the degradation of the antibiotic norfloxacin under visible light. In addition, these catalysts were impregnated with gold nanoparticles (Au NPs) in two metal weight percentages (0.5 and 1 wt%) to evaluate if there was an improvement in the composites’ catalytic performances. Samples were characterized by PXRD, TEM, XPS, TGA, FTIR, DRS and FL. Results obtained show that the introduction of Au NPs in the composite improves the degradation efficiency of norfloxacin and that, when the catalyst is capable of adsorbing the contaminant, a lower calcination temperature outperforms the benefits of the spinel presence.

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以盐渣中提取的铝为原料，结合氮化碳和纳米金，合成了催化光降解抗生素诺氟沙星的ZnAl-MMO

以盐渣中提取的铝为原料合成锌铝层状双氢氧化物（LDH），采用简单的气相沉积法与氮化碳结合，制备了2D/2D异质结构光催化剂。测试了两种煅烧温度（520℃和850℃）合成MMO，并在可见光下测试了它们对抗生素诺氟沙星的降解性能。此外，将这些催化剂以两种金属重量百分比（0.5和1 wt%）浸渍金纳米粒子（Au NPs），以评估复合材料的催化性能是否有改善。采用PXRD、TEM、XPS、TGA、FTIR、DRS和FL对样品进行了表征。结果表明，在复合材料中引入Au NPs提高了对诺氟沙星的降解效率，当催化剂能够吸附污染物时，较低的煅烧温度优于尖晶石的存在。

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来源期刊

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.