Polyaniline Nanorods: Synthesis, Characterization, and Application for the Determination ofpara-Nitrophenol

Abstract

A para-nitrophenol sensor based on a 5-sulfosalicylic acid doped polyaniline nanorods modified glassy carbon electrode is reported. The formation of 5-sulfosalicylic acid doped polyaniline was characterized by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The electroactivity of the 5-sulfosalicylic acid doped polyaniline nanorods was studied by cyclic voltammetry and differential pulse voltammetry and high response was observed for the reduction of para-nitrophenol. The calibration curve for para-nitrophenol was linear from 6.7 × 10 6 M to 112.1 × 10 6 M. The sensitivity and limit of detection were 24 nA µM 1 and 3.2 × 10 6 M, respectively. The sensor was simple, inexpensive, and employed for the determination of para-nitrophenol in tap water with recoveries from 97.6 to 101.0%.

Highly effective adsorption performance of carboxymethyl cellulose microspheres crosslinked with epichlorohydrin

“…As shown in Figure (A), absorption bands at about 3441, 2924, and 1059 cm −1 were attributed to the stretching vibrations of OH, CH (methylene), and COC, respectively . Absorption bands around 1626, 1421, and 1327 cm −1 were attributed to COO − asymmetric, COO − symmetric, and CO stretching vibrations of the carboxyl groups, respectively . After crosslinking by ECH, the carboxyl groups of CMC still existed, and no obvious changes were found.…”

A smart functional surfactant activated conductive polymer coated on paper with ultra-sensitive humidity sensing characteristics

“…Conducting polymer, especially polyaniline (PANI), has received significant attention due to its inexpensive monomer, ease of preparation, high yield and environmental stability [12,13]. PANI has shown great potential in applications such as electronics, corrosion protection layers, chemical sensors, anti-microbial coatings etc [14]. The electrical properties of PANI can be modulated by changing its oxidation state and protonation of amine group since the electrical conductivity of PANI depends on the mobility of charge carriers and hopping 3 mechanism between the PANI chains along with the concentration of charge carriers.…”

“…12,13 PANI has shown great potential in applications such as electronics, corrosion protection layers, chemical sensors, anti-microbial coatings etc. 14 The electrical properties of PANI can be modulated by changing its oxidation state and protonation of the amine group since the electrical conductivity of PANI depends on the mobility of charge carriers and the hopping mechanism between the PANI chains along with the concentration of charge carriers. Hence, water molecules could alter the charge mobility, thereby fluctuating its electrical conductivity, which makes it an active material for humidity sensors.…”

Covalent Organic Frameworks-TpPa-1 as an Emerging Platform for Electrochemical Sensing

“…); Figure S17: Amperometric responses of PCs/CPE to successive additions of various concentrations of GSH spiked in serum in 0.1 M PBS (pH = 4.0) at 0.25 V; Figure S18: Amperometric responses of PCs/CPE for the detection of GSH spiked in human serum in 0.1 M PBS (pH = 4.0) at 0.25 V; Table S1: Comparison of the Pd 2+ /COFs/GCE for different parameters with previously reported hydrazine electrodes; Table S2: Determination of hydrazine spiked in water samples; Table S3: Comparison of different modified GCE for detection of ONP and PNP; Table S4; Comparison of different modified electrodes for electrochemical sensing of GSH; Table S5; Determination of GSH spiked in human serum by successive additions;Table S6; Determination of GSH spiked in human serum by a non-successive addition method. References [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 ] were cited in the Supplementary Materials.…”