Electrodeposition of Silver Nanoparticles on MWCNT Film Electrodes for Hydrogen Peroxide Sensing

Abstract

Silver (Ag) nanoparticles were directly electrodeposited on multi-walled carbon nanotubes (MWCNT) in AgNO 3 /LiNO 3 containing EDTA (ethylenediaminetetraacetic acid). The structure and nature of the resulting Ag/MWNT composite were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD), and the distribution shape of Ag nanoparticles was found to be dependent on the presence of EDTA. The modified electrode showed excellent electrocatalytic activity to redox reaction of hydrogen peroxide and the mechanism of hydrogen peroxide was partly reversible procession with oxidation and reduction peaks at 0.77 and -0.83 V, respectively. The oxidation and reduction peak currents were linearly related to hydrogen peroxide concentration in the range of 1×10 -6 -3×10 -4 and 1×10 -8 -7×10-4 mol•L -1 with correlation coefficients of 0.996 and 0.986, and 3s-detection limit of 9×10 -7 and 7×10 -9 mol•L -1 .

Preparation and modification of carbon nanotubes: Review of recent advances and applications in catalysis and sensing

“…One of the most significant advantages of electrochemical deposition is the ability to control size and distribution of nanoparticles by varying potential, time or solution concentration. Most studies involving metal nanoparticle electrodeposition focus on noble metals such as Ag, Au, Pt, and Pd [126][127][128][129][130][131][132], with a few exceptions Ni, Cu [71,133,134], primarily due to the need for components of alternate energy sources. Table 1 shows a list of metal nanoparticles prepared on SWNTs by electrochemical methods.…”

Carbon nanotube decorated with silver nanoparticles via noncovalent interaction for a novel nonenzymatic sensor towards hydrogen peroxide reduction

“…Meanwhile, the exceptional electrical, chemical, and mechanical characters [3] made carbon nanotube (CNT) widely used in the construction of chemical sensors and biosensors [4], especially in the field of supporting materials [5]. The high surface area of CNT made it possible to load silver nanoparticles with high catalytic activity [6,7].…”

Silver Nanowire Film: Green Synthesis and Its Surface Enhanced Raman Scattering

“…8 Among all metals, silver nanostructures are particularly interesting to be fabricated and studied because bulk silver exhibits the highest electrical and thermal conductivity. Because their performance in many applications could be potentially enhanced by processing them into one-dimensional nanostructures, 6 much effort has been devoted to the synthesis of silver nanowires (AgNW), such as electrochemical techniques, [9][10][11] template ways, [12][13][14][15] microwave-assisted route, 16 and polymer-directed synthesis.…”