A Highly Sensitive Ascorbic Acid Sensor Based on Graphene Oxide/CdTe Quantum Dots-Modified Glassy Carbon Electrode

被引:0
作者
S. Kucukkolbasi
Z. O. Erdogan
C. Baslak
D. Sogut
M. Kus
机构
[1] Selcuk University,Department of Chemistry, Faculty of Science
[2] Selcuk University,Department of Chemical Engineering, Faculty of Engineering
来源
Russian Journal of Electrochemistry | 2019年 / 55卷
关键词
quantum dots; ascorbic acid; chemically modified electrodes; graphene oxide; electrochemical sensor;
D O I
暂无
中图分类号
学科分类号
摘要
Quantum dots (QDs) and graphene oxide (GO) are extremely attractive and important nanomaterials in analytical applications because of their their unusual chemical, physical and electronic properties. In this work, CdTe QDs with the size of about 3 nm were prepared and a novel electrochemical sensing material of ascorbic acid on GO/CdTe QDs/GC electrode was explored. Transmission electron microscopy (TEM) was used to examine the morphological characterization of CdTe QDs and cyclic voltammetry (CV) and electrochemical impedance spectroscopy were used to perform the electrochemical investigations of the GO/CdTe QDs/GC electrode. Because of the synergy between the CdTe QDs and GO, this novel sensing based on CdTe QDs/GO/GC electrode responded even more sensitively and selectively than that based on bare GC electrode. Effects of pH value, buffer concentration, deposition potential and deposition time and electroactive interferents on the response of GO/CdTe QDs/GC electrode for ascorbic acid sensor were discussed. Under optimum working conditions, a linear response of the modified electrode was obtained over the concentration range of 32.3–500.0 µM with the detection limit of 6.1 µM for ascorbic acid. Finally, the inexpensive, reliable and sensitive modified electrode based on GO/CdTe QDs/GC was succesfully applied for the determination of ascorbic acid in citrus samples.
引用
收藏
页码:107 / 114
页数:7
相关论文
共 181 条
[1]  
Kalimuthu P(2009)Electropolymerized film of functionalized thiadiazole on glassy carbon electrode for the simultaneous determination of ascorbic acid, dopamine and uric acid Bioelectrochemistry 77 13-18
[2]  
John SA(2003)Vitamin C as an antioxidant: evaluation of its role in disease prevention J. Am. College Nutrition 22 18-35
[3]  
Padayatty SJ(2012)Simultaneous determination of l-ascorbic acid, dopamine and uric acid with gold nanoparticles-β-cyclodextrin-graphene-modified electrode by square wave voltammetry Talanta 93 79-85
[4]  
Katz A(2012)A novel HPLC method for the concurrent analysis and quantitation of seven water-soluble vitamins in biological fluids (plasma and urine): a validation study and application Sci. World J. 2012 8-1051
[5]  
Wang Y(2013)Simultaneous and accurate determination of water- and fat-soluble vitamins in multivitamin tablets by using an RP-HPLC method Química Nova 36 1044-95
[6]  
Eck P(2007)Spectrophotometric determination of ascorbic acid by the modified CUPRAC method with extractive separation of flavonoids-La(III) complexes Anal. Chim. Acta 588 88-297
[7]  
Kwon O(2003)Comparison between polarography and titrimetry methods for determination of ascorbic acid in pharmaceutical dosage forms Boll Chim Farm 142 295-78
[8]  
Lee J-H(2012)Disposable paper-based electrochemical sensor utilizing inkjet-printed polyaniline modified screen-printed carbon electrode for ascorbic acid detection J. Electroanal. Chem. 685 72-721
[9]  
Chen S(2005)Polyaniline-modified electrode as an amperometric ascorbate sensor Sens. Actuators B: Chem. 107 716-60
[10]  
Corpe C(2014)A novel voltammetric sensor for ascorbic acid based on molecularly imprinted poly(o-phenylenediamine-co-o-aminophenol) Anal. Chim. Acta 809 54-57