A new electrochemical sensor based on Fe3O4 functionalized graphene oxide-gold nanoparticle composite film for simultaneous determination of catechol and hydroquinone

2015 ◽  
Vol 186 ◽  
pp. 302-313 ◽  
Author(s):  
Seyma Erogul ◽  
Salih Zeki Bas ◽  
Mustafa Ozmen ◽  
Salih Yildiz
Keyword(s):  
Graphene Oxide ◽  
Composite Film ◽  
Electrochemical Sensor ◽  
Simultaneous Determination ◽  
Gold Nanoparticle ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide

scholarly journals Simultaneous Determination of Uric Acid and Xanthine Using a Poly(Methylene Blue) and Electrochemically Reduced Graphene Oxide Composite Film Modified Electrode

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Gen Liu ◽  
Wei Ma ◽  
Yan Luo ◽  
Deng-ming Sun ◽  
Shuang Shao
Keyword(s):  
Methylene Blue ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Composite Film ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

Poly(methylene blue) and electrochemically reduced graphene oxide composite film modified electrode (PMB-ERGO/GCE) was successfully fabricated by electropolymerization and was used for simultaneous determination of uric acid (UA) and xanthine (Xa). Based on the excellent electrocatalytic activity of PMB-ERGO/GCE, the electrochemical behaviors of UA and Xa were studied by cyclic voltammetry (CV) and square wave voltammetry (SWV). Two anodic sensitive peaks at 0.630 V (versus Ag/AgCl) for UA and 1.006 V (versus Ag/AgCl) for Xa were given by CV in pH 3.0 phosphate buffer. The calibration curves for UA and Xa were obtained in the range of 8.00 × 10−8~4.00 × 10−4 M and 1.00 × 10−7~4.00 × 10−4 M, respectively, by SWV. The detection limits for UA and Xa were3.00×10-8 M and5.00×10-8 M, respectively. Finally, the proposed method was applied to simultaneously determine UA and Xa in human urine with good selectivity and high sensitivity.

Ultrafine gold nanoparticle embedded poly(diallyldimethylammonium chloride)–graphene oxide hydrogels for voltammetric determination of an antimicrobial drug (metronidazole)

2020 ◽  
Vol 8 (22) ◽  
pp. 7575-7590 ◽  
Author(s):  
Pitchaimani Veerakumar ◽  
Arumugam Sangili ◽  
Shen-Ming Chen ◽  
King-Chuen Lin
Keyword(s):  
Graphene Oxide ◽  
Gold Nanoparticle ◽  
Antimicrobial Drug ◽  
Voltammetric Determination ◽  
Functionalized Graphene ◽  
Diallyldimethylammonium Chloride

In this work, gold nanoparticle (Au NP) decorated poly(diallyldimethylammonium chloride) (PDDA) functionalized graphene hydrogel (Au NP@PDDA/GH) nanocomposites were fabricated.

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