Novel Electrochemical Coupled Three-in-One Sensing System for Transforming Organic Pollutants into Green Fuels and Their Sensing

IF 1.1 4区工程技术 Q4 ELECTROCHEMISTRY

Russian Journal of Electrochemistry Pub Date : 2024-01-16 DOI:10.1134/s1023193523220044

Indu Pandey, Jai Deo Tiwari, Ashish Shukla, M. Sennappan, Periyakaruppan Karuppasamy

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Abstract

The organic pollutants present in wastewater produce greenhouse gas, CO₂. Effective utilization of CO₂ into valuable green fuels and its sensing is focused research area. Aiming above, this work is focused on fabrication of electrochemical coupled sensing system for degradation of 4-nitrophenol to CO₂ from wastewater samples, electrochemical reducing system for transforming CO₂ to alcohols and selective amperometric sensing system for quantifying alcohols. A graphene anchored iron oxide electrode was used as an electrocatalyst to facilitate the electrochemical oxidation process to mineralized organic pollutants into water and CO₂. The CuO film on silicon substrate was used in cathodic compartment for converting CO₂ to methanol and ethanol. Alcohol oxidase modified Au–Cu nanoparticle modified pencil graphite was selective sensing and quantifying the methanol and ethanol. The experimental results revealed that, graphene anchored iron oxide showed maximum degeneration of 4-nitrophenol 72% at 0.9 V. Furthermore, simultaneous reduction of CO₂ at cathode gave good yield of the liquid fuels CH₃OH and C₂H₅OH were 105.0 and 90.0 μmol/L respectively. In addition, Alcohol oxidase modified Au–Cu nanoparticles modified pencil graphite biosensor displays a linear response to both methanol and ethanol in the range 0.250–850 μmol/L with a detection limit of 0.07 μmol/L (S/N = 3) (RSD = 0.004 μA) and 0.7–800 μmol/L with detection limit of 0.068 μmol/L (S/N = 3) (RSD = 0.005 μA) with >40% quantitative yield. The response time is less than 50 s at ambient conditions. Consequently, the ethanol and methanol yield were obtained 30.0%. Our developed three-in-one provides a convenient, simple and reliable method to remediate polluted water and utilizing CO₂ into green fuels.

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用于将有机污染物转化为绿色燃料及其传感的新型电化学耦合三合一传感系统

摘要废水中的有机污染物会产生温室气体二氧化碳。有效利用 CO2 制成有价值的绿色燃料及其传感是重点研究领域。为了实现上述目标，这项工作的重点是制造电化学耦合传感系统，用于将废水样品中的 4-硝基苯酚降解为 CO2；制造电化学还原系统，用于将 CO2 转化为酒精；以及制造选择性安培传感系统，用于量化酒精。石墨烯锚定氧化铁电极被用作电催化剂，以促进电化学氧化过程，将有机污染物矿化成水和二氧化碳。硅基板上的氧化铜薄膜用于阴极区，将二氧化碳转化为甲醇和乙醇。酒精氧化酶修饰的 Au-Cu 纳米粒子修饰的铅笔状石墨可选择性地感知和定量甲醇和乙醇。实验结果表明，在 0.9 V 电压下，石墨烯锚定氧化铁对 4-硝基苯酚的降解率最高，达 72%。此外，在阴极同时还原 CO2 的过程中，液体燃料 CH3OH 和 C2H5OH 的产率分别为 105.0 和 90.0 μmol/L。此外，酒精氧化酶修饰的 Au-Cu 纳米粒子修饰的铅笔石墨生物传感器对甲醇和乙醇在 0.250-850 μmol/L（检出限为 0.07 μmol/L，S/N = 3）（RSD = 0.004 μA）和 0.7-800 μmol/L（检出限为 0.068 μmol/L，S/N = 3）（RSD = 0.005 μA）范围内均呈线性响应，定量率为 40%。在环境条件下，反应时间小于 50 秒。因此，乙醇和甲醇的收率达到了 30.0%。我们开发的三合一技术为污染水质的修复和将二氧化碳转化为绿色燃料提供了一种方便、简单和可靠的方法。

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

Russian Journal of Electrochemistry 工程技术-电化学

CiteScore

1.90

自引率

8.30%

发文量

102

审稿时长

6 months

期刊介绍： Russian Journal of Electrochemistry is a journal that covers all aspects of research in modern electrochemistry. The journal welcomes submissions in English or Russian regardless of country and nationality of authors.