Development of a semigraphitic sulfur-doped ordered mesoporous carbon material for electroanalytical applications

SENSORS AND ACTUATORS B-CHEMICAL

卷:257

Article

Maluta, Jaqueline R.¹  Machado, Sergio A. S.¹  Chaudhary, Umesh^2,3  Sebastian Manzano, J.^2,3  Kubota, Lauro T.⁴  Slowing, Igor I.^2,3 

[1] Univ Sao Paulo, Sao Carlos Inst Chem, CP 380, BR-13566590 Sao Carlos, SP, Brazil

[2] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA

[3] Iowa State Univ, Dept Chem, Ames, IA 50011 USA

[4] Univ Estadual Campinas, Inst Chem, Dept Analyt Chem, POB 6154, BR-13084971 Campinas, SP, Brazil

关键词: Ordered mesoporous carbon;    Sulfur-doped carbon;    Mesoporous silica nanoparticles;    Electrochemical sensor;    Chloramphenicol detection;   

DOI  :  10.1016/j.snb.2017.10.164

来源: Elsevier

【 摘 要 】

The modification of traditional electrodes with mesoporous carbons is a promising strategy to produce high performance electrodes for electrochemical sensing. The high surface area of mesoporous carbons provides a large number of electroactive sites for binding analytes. Controlling the pore size and structure of mesoporous carbons and modifying their electronic properties via doping offers additional benefits like maximizing transport and tuning the electrochemical processes associated with analyte detection. This work reports a facile method to produce sulfur-doped ordered mesoporous carbon materials (S-OMC) with uniform pore structure, large pore volume, high surface area and semigraphitic structure. The synthesis used thiophenol as a single source of carbon and sulfur, and iron as a catalyst for low temperature carbonization. The S-OMC material was deposited on a glassy carbon electrode and used as a sensor with high sensitivity (11.7 ALmol(-1)) and selectivity for chloramphenicol detection in presence of other antibiotics. As a proof-of-concept, the sensor was applied to the direct analysis of the drug in reconstituted powdered milk and in commercial eye drops. (c) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free