New Niobate Based Catalyst for Organic Dye Oxidation: A Mechanistic Approach

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2024-09-12 DOI:10.1007/s11270-024-07480-z

Carlos Giovani O. Bruziquesi, José Balena G. Filho, Herman S. Mansur, Poliane Chagas, Alexandra A. P. Mansur, Luiz Carlos A. Oliveira, Adilson C. Silva

引用次数: 0

Abstract

In this work, we aimed to demonstrate new polyoxoniobate containing surface peroxo groups obtained after the treatment of niobic acid with hydrogen peroxide and lyophilization process. Raman and diffuse reflectance measurements confirm the presence of peroxo groups in the new polyoxometalate. Isotherms from N₂ adsorption/desorption have evidenced a drastic change in specific surface area after treatment with hydrogen peroxide, from 195 m².g⁻¹ for Nb1 to 4 m².g⁻¹ for Nb3. Catalytic studies were performed for Congo red (CR) oxidation using H₂O₂ as oxidizing promoter. The results showed a new material with larger specific area, smaller particle size and an increase in peroxo groups, thus leading to higher catalytic response of discoloration of the Congo red (about 70% for Nb3 and close to 20% for the other catalysts) as compared with the raw material, without previous treatment.

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基于铌酸盐的新型有机染料氧化催化剂：一种机理方法

在这项工作中，我们旨在展示用过氧化氢处理铌酸并进行冻干处理后获得的含有表面过氧基团的新型聚氧化铌酸盐。拉曼和漫反射测量证实了新型聚氧乙烯酮酸酯中过氧基团的存在。N2吸附/解吸等温线表明，经过过氧化氢处理后，比表面积发生了急剧变化，从 Nb1 的 195 m2.g-1 降至 Nb3 的 4 m2.g-1。以 H2O2 作为氧化促进剂，对刚果红（CR）氧化进行了催化研究。结果表明，与未经处理的原材料相比，新材料的比表面积更大、粒度更小、过氧基团增多，因此对刚果红褪色的催化反应更高（Nb3 约为 70%，其他催化剂接近 20%）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.