Electrochemical Synthesis of Chitosan‐co‐polyaniline/WO3⋅nH2O Composite Electrode for Amperometric Detection of NO2 Gas

Tiwari, Ashutosh; Gong, Shaoqin

doi:10.1002/elan.200804237

Cited by 46 publications

(18 citation statements)

References 38 publications

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“…Graft copolymerization, enzyme immobilization and characterization In the electrochemical copolymerization synthesis, the aniline monomer initially became protonated with HCl and propagated to form an intermediate called PANI radical cation (Figure 2a) [17][18][19]. PANI radical cation simultaneously generated CHIT macro radicals (Figure 2b) by the abstraction of hydrogen from the -OH and -NH 2 groups of the CHIT macromolecules [15,16]. The PANI cation radicals and CHIT macro radicals then copolymerized and yielded CHIT-g-PANI (Figure 2c).…”

Section: Photometric Apparent Enzyme Activity Measurementmentioning

confidence: 99%

“…Meanwhile, Chitosan (CHIT) has become a widespread biopolymer owing to its remarkable chemical and biological characteristics. It is a hydrophilic material due to the presence of both amino and hydroxyl groups; however, CHIT is insoluble in water and aqueous basic media [15]. It was chosen as the orientation directing matrix because there are large quantities of amino and hydroxyl groups on the CHIT units, which have a strong binding ability to enzyme and DNA [14,16].…”

Section: Introductionmentioning

confidence: 99%

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Chitosan-g-polyaniline: a creatine amidinohydrolase immobilization matrix for creatine biosensor

Tiwari

Shukla²

2009

Express Polym. Lett.

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Abstract.A novel matrix composed of chitosan-graft-polyaniline (CHIT-g-PANI) was electrochemically prepared to investigate the immobilization of creatine amidinohydrolase (CAH). CAH enzyme was covalently immobilized with the CHIT-g-PANI matrix using glutaraldehyde as a linker. The resulting CAH/CHIT-g-PANI biomatrix was characterized with Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), contact angle measurement and cyclic voltammetry (CV) taking CHIT-g-PANI as a reference. The influence of various parameters on CAH enzyme activity within the matrix was investigated including pH, temperature, and time. The Michaelis-Menten constant and apparent activities for the CAH enzyme were calculated to be 0.51 mM and 83.59 mg/cm 2 , respectively; indicating CHIT-g-PANI matrix has a high affinity to immobilize CAH enzyme.

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Section: Photometric Apparent Enzyme Activity Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chitosan-g-polyaniline: a creatine amidinohydrolase immobilization matrix for creatine biosensor

Tiwari

Shukla²

2009

Express Polym. Lett.

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“…Several other examples of conducting-polymer/metal oxide nanocomposite materials also exist for chemical sensing of a range of analytes, including humidity [58,59], NO 2 , [60,61], CO and H 2 [60], and H 2 O 2 [62]. This latter example employed the use of Prussian blue, which is an iron complex with excellent catalytic properties, particularly towards O 2 and H 2 O 2 .…”

Section: Metal-oxide Nanoparticles/conducting-polymer Nanocompositesmentioning

confidence: 99%

Nanostructured Conducting Polymers for (Electro)chemical Sensors

Killard

2010

Nanostructured Conductive Polymers

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Conducting polymers have been investigated for many years now for their electrical and electrochemical properties. The moderate range of conducting polymers now available, their many derivatives, broad range of counter-ion doping options, level of proton doping, and the many synthetic routes result in a large range of material properties in terms of conductivity, chemical sensitivity, selectivity, and redox characteristics. This allows them to participate in many chemical interactions which are suitable for chemosensing applications.Nanotechnology allows conducting-polymer materials to be studied and applied to chemical sensing in a new way. Controlling the structure and morphology of conducting polymer materials at nanoscales brings the prospect of a range of enhancements not possible with traditional bulk materials. Traditional routes to polymer formation, such as chemical and electrochemical synthesis, lack any fine control on the tertiary structure of the growing polymer, and this lack of structural reproducibility has negative consequences for the performance of the material as a sensor interface. In addition, such polymerizations, Nanostructured Conductive PolymersEdited by Ali Eftekhari

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“…Thus, incorporation of CP (such as PANI) onto CS to obtain biopolymer composites is gaining interest. Such polymer composites exhibited the unique properties of CS as well as the characteristics of CPs and also find applications various fields for instance biosensors, 26,27 catalysis, 28 gas sensor, 29 and artificial muscles. 30 One of the problems that restrict the use of CS is low conductivity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of conductive chitosan-poly[N-(3-trimethoxysilylpropyl)aniline] hybrid submicrostructures

2011

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Conducting hybrid submicrostructures composed of chitosan (CS) and silica-based conducting poly [N-(3-trimethoxysilylpropyl)aniline] (PTMSPA) were prepared by graft copolymerization. The spherical and fibrous morphologies of the CS-PTMSPA hybrid submicrostructures could be observed by optical and field emission electron microscopy. Under room temperature conditions, the CS-PTMSPA graft copolymers possessed the uniformly distributed spherical submicroparticles with diameters in the range of ca. 400-1,000 nm. On the other hand, under ice cold conditions (5 ºC), CS-PTMSPA showed the development of randomly oriented fiber bundles. The diameter of a single fiber was in the range of ca. 100-500 nm. These CS-PTMSPA fibers were obtained by a temperaturedriven template-free self-assembly pathway. Spectroscopic and thermal evaluations confirmed that CS-PTMSPA graft copolymer had been prepared by an oxidative polymerization method. The electrochemical performance of the CS-PTMSPA submicrostructures were compared with CS and PTMSPA by cyclic voltammetry with the Fe(CN) 6 3-/4-system as a redox marker. The CS-PTMSPA submicrostructures showed high electrical conductivity (difference between the anodic and cathodic peaks = 0.24 and 0.29 V for CS-PTMSPA sphere and fiber, respectively) compared to those of CS (0.14 V) and PTMSPA (0.20 V), which was ascribed to the relatively high surface-to-volume ratios of these submicrostructures.

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Electrochemical Synthesis of Chitosan‐co‐polyaniline/WO₃⋅nH₂O Composite Electrode for Amperometric Detection of NO₂ Gas

Cited by 46 publications

References 38 publications

Chitosan-g-polyaniline: a creatine amidinohydrolase immobilization matrix for creatine biosensor

Chitosan-g-polyaniline: a creatine amidinohydrolase immobilization matrix for creatine biosensor

Nanostructured Conducting Polymers for (Electro)chemical Sensors

Preparation and characterization of conductive chitosan-poly[N-(3-trimethoxysilylpropyl)aniline] hybrid submicrostructures

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