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Miniaturized electrochemical sensor for in-field monitoring of chemical oxygen demand

主 讲 人 :段文超    

活动时间:04月02日15时00分    

地      点 :理科群7号楼C118

讲座内容:

This presentation will report the production of two electrochemical sensors for the measurement of COD to be applied in two different scenarios. On the one hand, a simple sample-in / answer-out electrochemical sensor based on a Cu nanoparticle (NP) porous C nanocomposite active material was fabricated by screen-printing technologies and could be applied to perform discrete on-site measurements of this target parameter.  The device incorporates a paper disk modified with an electrolyte that allows for sample pretreatment including filtration and pH adjustment. Thus, analytical measurements are completed by adding a drop of the sample without any further user intervention. The overall sensor fabrication process can be mass-produced for cost-effective manufacturing. On the other hand, a Cu NP-modified C/SiO2 thin-film electrochemical sensor fabricated by a photolithographic approach on silicon substrates and integrated into a modular microfluidic system, is shown to be of potential use for the on-line continuous monitoring of COD in water samples. The C/SiO2 electrodes can be produced at the wafer level and show excellent electrochemical performance, demonstrating the scalability of the engineering process for industrial fabrication. The potential of the two electrochemical sensor approaches to analyze the organic load of urban wastewater is evaluated by analyzing three real samples coming from an urban wastewater treatment plant. The COD values obtained with the sensors are in very good agreement with the values measured using the standard dichromate method provided by an accredited laboratory. The two miniaturized sensor platforms can facilitate rapid decentralized analysis for precise control of municipal wastewater treatment.


主讲人介绍:

段文超,

Commonwealth Scientific and Industrial Research Organisation (CSIRO) (澳大利亚联邦科学院)


发布时间:2024-04-02 08:40:02

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冀公网安备 13010802000630号


地址:河北省石家庄市南二环东路20号 邮编:050024 

版权所有猫咪官网入口点击进入

冀ICP备18011017号-3

冀公网安备 13010802000630号

地址:河北省石家庄市南二环东路20号

邮编:050024