Improving Redox Activity of Colloidal Plasmonic-Magnetic Nanocrystals by Chemical State Modulation.

IF 7.5 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
ChemSusChem Pub Date : 2024-12-16 DOI:10.1002/cssc.202402327
Chiao-Ting Cho, Yi-Jui Yeh, Loganathan Veeramuthu, Chi-Ching Kuo, Kuo-Lun Tung, Wei-Hung Chiang
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引用次数: 0

Abstract

Controlling the redox ability is crucial for optimizing catalytic processes in clean energy, environmental protection, and CO2 reduction, as it directly influences the reaction efficiency and electron transfer rates, driving sustainable and effective outcomes. Here, we report the plasma-electrified synthesis of composition-controlled FeAu bimetallic nanoparticles, specifically engineered to enhance the redox catalytic performance through precise tuning of their chemical states. Utilizing atmospheric-pressure microplasmas, FeAu nanoparticles were synthesized under ambient conditions without the need for reducing agents or organic solvents, thereby providing a green and sustainable approach. The catalytic activity of the FeAu nanoparticles was significantly influenced by the oxidation states of Au modulated by adjusting the process. This precise tuning directly affects the oxidation-reduction potential (ORP) of the nanoparticles, driving their superior degradation performance. The FeAu-1.52 sample exhibited the highest normalized rate constant (k=46.3 s-1 g-1), attributed to an optimal Au+/Au0 ratio that facilitates efficient electron transfer and redox cycling during the catalytic reduction of 4-NP to 4-aminophenol (4-AP). Beyond 4-NP, the FeAu nanoparticles demonstrated robust catalytic degradation of multiple dye pollutants for industrial wastewater treatment. This study elucidates the critical role of chemical state tuning in determining redox performance and presents a promising nanotechnology platform for sustainable environmental remediation.

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来源期刊
ChemSusChem
ChemSusChem 化学-化学综合
CiteScore
15.80
自引率
4.80%
发文量
555
审稿时长
1.8 months
期刊介绍: ChemSusChem Impact Factor (2016): 7.226 Scope: Interdisciplinary journal Focuses on research at the interface of chemistry and sustainability Features the best research on sustainability and energy Areas Covered: Chemistry Materials Science Chemical Engineering Biotechnology
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