富苯基碳氧硅(SiCO)陶瓷作为伏安法检测多菌灵的电极材料的性能研究

IF 2.6 4区 化学 Q3 ELECTROCHEMISTRY Journal of Solid State Electrochemistry Pub Date : 2024-09-05 DOI:10.1007/s10008-024-06052-9
Maria de Almeida Silva, Daniela Martins Fernandes de Oliveira, César Ricardo Teixeira Tarley, Mariana Gava Segatelli
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引用次数: 0

摘要

本文利用循环伏安法证明了富苯基碳化氧(SiCO)陶瓷作为多菌灵伏安法电极材料的可行性。陶瓷是由二乙烯基封端的聚(二甲基硅氧烷-共二苯基硅氧烷)热解制备的,热解过程中使用了二乙烯基苯、1,3,5,7-四甲基-1,3,5,7-四乙烯基环四硅氧烷进行交联,在没有交联剂的情况下,使用氩气将温度升高到 1500 °C,时间分别为 1、3 和 5 小时。在非结晶基质中产生了碳化硅(SiC)结晶和石墨碳域,随着退火时间的延长,相结晶的情况有所改善,主要是在有机交联剂存在的情况下。以 SiCO 为基础的电极材料被用作浆料(陶瓷和矿物油的比例为 80:20wt.%),多菌灵的伏安行为与商用玻璃碳电极(GCE)进行了比较。陶瓷电极的电化学性能与聚合物化学成分和退火时间有关,其中有机交联剂衍生的 SiCO 在退火 3 小时后与其他陶瓷和商用 GCE 相比,对多菌灵的伏安响应最佳。有机交联剂衍生的 SiCO 陶瓷具有更大的半导体碳化硅晶体、更好的残余碳相石墨化、更低的电荷转移电阻和更高的孔隙率,这对 SiCO 材料的电化学性能起着至关重要的作用。除了提高多菌灵的检测性能外,未改性陶瓷的生产及其作为电极材料的直接使用,也为传感器的制备带来了巨大的优势,避免了通常在改性电极上看到的耗时耗力的技术难题。
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Investigation on the performance of phenyl-rich silicon oxycarbide (SiCO) ceramics as electrode material for voltammetric detection of carbendazim

This paper demonstrated the feasibility of phenyl-rich oxycarbide (SiCO) ceramics as electrode materials in voltammetric measures of carbendazim using cyclic voltammetry. Ceramics were prepared from pyrolysis of poly(dimethylsiloxane-co-diphenyl-siloxane) divinyl terminated, crosslinked with divinylbenzene, 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane, and in the absence of crosslinking agent, using argon atmosphere up to 1500 °C during 1, 3, and 5 h. Silicon carbide (SiC) crystallites and graphitic carbon domains were produced in the non-crystalline matrices and the phase crystallization was improved as the annealing time increased, mainly in the presence of organic crosslinker. SiCO-based electrode materials were used as a paste (ceramic and mineral oil in 80:20 wt.% proportion), and carbendazim’s voltammetric behavior was compared to commercial glassy carbon electrode (GCE). The electrochemical performance of ceramic electrodes showed a dependence on both polymer chemistry and annealing time, in which organic crosslinker-derived SiCO at 3h annealing displayed the best voltammetric response for carbendazim when compared to other ceramics and commercial GCE. Larger semiconductive SiC crystallites, better graphitization of residual carbon phase, lower charge transfer resistance and higher porosity developed into ceramics derived from organic crosslinker played a crucial role on electrochemical performance of SiCO materials. Apart from the improved performance for carbendazim detection, the unmodified produced ceramics, and their direct use as electrode materials, bring substantial advantages for the preparation of sensors avoiding time-consuming and skills to properly prepare, as usually observed in the modified electrodes.

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来源期刊
CiteScore
4.80
自引率
4.00%
发文量
227
审稿时长
4.1 months
期刊介绍: The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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