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Amperometric Ascorbic Acid Sensor Based on Disposable Facial Tissues Derived Carbon Aerogels

Chemical Research in Chinese Universities 2020年第1期36卷 139-144页

作者： GU Yanan LIU Jingju ZHOU Ming Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of jilin Province Key Laboratory of Polyoxometalate Science of Ministry of EducationNational&Local United Engineering Laboratory for Power BatteriesFaculty of ChemistryNortheast Normal UniversityChangchun 130024P.R.China

In this study,the disposable facial tissues derived carbon aerogels(DFTs-CAs)were synthesized using disposable facial tissues as the raw material for fabricating a sensitive amperometric ascorbic acid(AA)*** experimental results indicated that compared to glassy carbon electrode(GCE)and the popular carbon nanotubes modified GCE(CNTs/GCE),DFTs-CAs modified GCE(DFTs-CAs/GCE)exhibited better electrocatalytic activity(i.e.,lower peak potential and higher peak current)for AA electrooxidation and higher analytical performance for AA determination(i.e.,wider linear range,higher sensitivity and lower detection limit),which could be most likely due to the high density of defective sites and large specific surface area of ***,the DFTs-CAs/GCE was used for evaluating the AA level in real samples(i.e.,medical injection dose,vitamin C tablets,fresh orange juice and human urine)and the results are satisfactory.

关键词： Ascorbic acid Biomass Disposable facial tissues derived carbon aerogel Electrochemical sensor

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Electrocatalytic water splitting at nitrogen-doped carbon layers-encapsulated nickel cobalt selenide

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Journal of Energy Chemistry 2019年第7期28卷 161-170页

作者： Chuanlai Jiao Xiangjie Bo Ming Zhou Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of jilin Province Key Laboratory of Polyoxometalate Science of Ministry of EducationNational & Local United Engineering Laboratory for Power Batteries Department of Chemistry Northeast Normal University

Generally,the catalytic overpotentials of hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)are unavoidable because of the low charge *** this work,two strategies of alloying of Co with Ni and enclosing of electrocatalysts with carbonaceous materials were both used to accelerate the catalytic efficiency of cobalt selenide for water *** nitrogen-doped carbon(NC)layer improves the reaction kinetics by efficient charge *** alloying of metal into composited electrocatalysts can modify the electronic properties of host materials,thereby tuning the adsorption behavior of intermediate and improving the electrocatalytic *** expected,Nyquist plots reveal that the charge-transfer resistance(Rct)of nickel cobalt selenide encapsulated into nitrogen-doped carbon layer(CoNiSe/NC-3,Co:Ni=1:1)are just 5 and 9 for HER and OER,respectively,which are much lower than those of CoSe/NC-1(Co:Ni=1:0)(81 and 138)and CoNiSe/NC-3 without NC(CoNiSe-3)(54 and 25).With the high charge transfer and porous structure,CoNiSe/NC-3 shows good performance for both HER and *** current density reaches 10 m A cm-2,only 100 and 270 mV overpotentials are required for HER and OER,*** the potential of 1.65 V,full water splitting also can be catalyzed by Co Ni Se/NC-3 with current density of 20 m A cm-2,suggesting that CoNiSe/NC-3 could be used as replacement for noble metal electrocatalysts.

关键词： Nickel cobalt selenide Nitrogen-doped carbon layer Water splitting Hydrogen evolution reaction Oxygen evolution reaction

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