Au Nanoparticles and Polyaniline Coated Resin Beads for Simultaneous Catalytic Oxidation of Glucose and Colorimetric Detection of the Product

Abstract

In this letter, we report the synthesis of Au nanoparticles (NPs) and polyaniline (PANI) on the same cation-exchange resin beads and demonstrate their use in catalyzing the oxidation of glucose to gluconic acid by Au NPs and simultaneously in detecting the formation of the acid by the color change of PANI. The synthesis was carried out by exchanging the cations of the resins with HAuCl4 and anilinuium chloride and then reducing the metal ions by NaBH4 to produce Au NPs followed by polymerization of aniline using H2O2. The green emeraldine salt form of PANI thus obtained was treated with NaOH to be converted to blue emeraldine base before use. The deposition of Au NPs was confirmed by a change in color of the bead, visible spectroscopy, X-ray diffraction, and scanning electron microscopic measurements. On the other hand, the presence of PANI was confirmed by Fourier transform infrared (FTIR) and ultraviolet-visible (UV-vis) spectroscopy. The formation of gluconic acid from glucose was confirmed by FTIR spectroscopy. We could detect the presence of glucose of a minimum 1.0 mM concentration in water, using the present method. Our experimental observations demonstrate the possibility of the incorporation of multifunctional components on the surfaces of resins for carrying out a chemical reaction as well as detection of the product.

Electrocatalytic oxidation of lactose on gold nanoparticle modified carbon in carbonate buffer

“…This figure shows a peak at 540 nm which is indicative of the formation of gold nanoparticles in the colloidal solution; this is in agreement with the results described in the literature [14,16,17].…”

“…Various reports have described the preparation of nanoparticlesbased electrodes for diverse applications [14][15][16]. The electrocatalytic oxidation of carbohydrates on this type of electrode is attractive because of interest in sugaroxygen fuel cell application, as well as sugar sensors for the medical and food industry [17][18][19].…”

Large Scale Preparation of Palladium Nanoparticles Loaded Polyaniline Nanostructures through Seed Induced Bulk Polymerization

“…The preparation of PANI/TiO 2 , PANI/Cu, PANI/Au, PANI/Ag has been reported. [9][10][11][12][13][14][15][16][17][18] Conducting PANI supported PdNPs were synthesized by the reduction of Pd nitrate on the surface of PANI through electrochemical methods. [19] Amaya et al [20] reported on the template synthesis of CP/PdNPs composites.…”

Synthesis of polyanthranilic acid-Au nanocomposites by emulsion polymerization: development of dopamine sensor

“…Nanocomposites are not only known for their nano-dimension but also for exhibiting synergistic properties due to the combination of its two different components, i.e. matrix and filler, in particular, conducting polymer and metal-based nanocomposites formed by decorating a conducting polymer with metal nanoparticles such as Ag, Au, Pt or Pd (Hable and Wrighton 1991;Majumdar et al 2005Majumdar et al , 2006Tseng et al 2005) have been reported for multiple technological application related to catalysis, sensors, electronic devices like transistor, etc. In general, there are two suitable methods of synthesis of conducting polymer metal-based nanocomposite.…”