Synthesis of PtNPs/MWCNT Functionalized with 4-Mercaptophenylboronic Acid for an Electrochemical Sensor of Fructose

Abstract

Platinum nanoparticles (PtNPs) on multi-wall carbon nanotubes (MWCNT) were functionalized with 4-mercaptophenylboronic acid (4MPB) for electrochemical detection of fructose. The composite nanomaterial was characterized by physicochemical techniques such as TGA and TEM, and electrochemically using the [Fe(CN) 6 ] 3−/4− as channel ion. Experimental values indicate that this sensor presents high sensitivity and selectivity for electrochemical detection of fructose with the sensitivity of 2.794 × 10 −5 A mM −1 in a range of 2.5 to 10 mM using cyclic voltammetry and sensitivity 8.65 mM −1 in range of 0.5 to 10 mM using electrochemical impedance spectroscopy.

Electrokinetic Carbohydrates Sensor by Streaming Potential with 3MPBA-PtNPs-CNTs Composite Material

“…Nitric acid (HNO 18 Synthesis of Pt NPs/CNTs.-Before Pt NPs synthesis, the CNT surface was modified by chemical oxidation in a mixture of concentrated acids (H 2 SO 4 /HNO 3 ) with a relation of 3:1 at 100 °C for 2 h. The synthesis of platinum particles over oxidized CNTs was carried out by the inverse microemulsion method as we previously reported. 19 The microemulsion system employed was prepared in a mixture of 2-propanol and H 2 O with a proportion of 13:87% v/v, respectively, in this solvents mixture, was dissolved 5.4 × 10 −3 mol of CTAB. In the CTAB, microemulsion dissolution the CNTs, K 2 PtCl 6 , NaBH 4, and C 6 H 5 Na 3 O 7 were dispersed.…”

Review—Recent Advances in Nanostructured Graphitic Carbon Nitride as a Sensing Material for Heavy Metal Ions

“…Advances in nanotechnology have led to the foundation of nanomaterials development that possesses unique physiochemical properties, application-oriented morphologies, defects, band gaps, and so on. These intriguing nanomaterial properties have been extensively studied by material scientists and researchers to explore their potential applications in electronics, [1][2][3][4] energy conversion, 5-9 catalysis, [10][11][12][13][14][15][16] bioimaging, [17][18][19] sensing, [20][21][22][23][24][25][26][27] and photonics. 28 Graphitic carbon nitride (g-C 3 N 4 ), a stable allotrope in the carbon nitride family has recently been demonstrated as a promising candidate for broad range of applications because of source material availability, pure composition, low-cost, facile synthesis, structural regulations and chemical stability.…”