Improving Ammonia Detecting Performance of Polyaniline Decorated rGO Composite Membrane with GO Doping

Abstract

Gas-sensing performance of graphene-based material has been investigated widely in recent years. Polyaniline (PANI) has been reported as an effective method to improve ammonia gas sensors’ response. A gas sensor based on a composite of rGO film and protic acid doped polyaniline (PA-PANI) with GO doping is reported in this work. GO mainly provides NH3 adsorption sites, and PA-PANI is responsible for charge transfer during the gas-sensing response process. The experimental results indicate that the NH3 gas response of rGO is enhanced significantly by decorating with PA-PANI. Moreover, a small amount of GO mixed with PA-PANI is beneficial to increase the gas response, which showed an improvement of 262.5% at 25 ppm comparing to no GO mixing in PA-PANI.

Osmium Recovery as Membrane Nanomaterials through 10–Undecenoic Acid Reduction Method

“…The nanoparticles' characteristics (nature, morphology, dimensions) and their distributions are decisive for membrane processes' performance [3][4][5]. A wide variety of materials, especially nanometers, have been used to prepare the composite membranes: graphene [6], fullerenes [7], carbon nanotubes [8], oxide materials, metals and their compounds [9][10][11]. Metal nanoparticles are increasingly used in the manufacture of composite membranes and related membrane processes because they provide the membranes with the ability to react selectivity, or with a biocidal effect.…”

Polyaniline Synthesized by Different Dopants for Fluorene Detection via Photoluminescence Spectroscopy

“…A conductive polymer is a polymer that exhibits semiconductor or even conductor properties by chemically or electrochemically doping its backbone with a conjugated double bond [ 5 , 6 ]. The main conductive polymers, such as p-phenylenevinylene (PPV), polypyrrole (PPy) and polyaniline (PANI), are being applied in many areas, including photothermal therapy, electromagnetic interference shielding, photovoltaic cell, storage battery, membrane gas separation, microwave absorption, chemical sensors and anti-corrosion coating [ 7 , 8 , 9 , 10 ]. Some of their advantages include improved interface qualities, suitability for the production of lightweight devices, affordability and high productivity [ 10 , 11 ].…”

“…PANI is a singular conducting polymer compound with unique electrical and optical properties [ 10 ] and has the advantages of simple synthesis, environmental stability, affordability and flexible control of electrical features with charge-transfer doping and protonation [ 10 , 12 , 13 ]. Owing to its extraordinary properties, this compound can be used in various fields, such as electrochromic glasses [ 14 ], solar cells [ 15 ], electroluminescent machines [ 10 ], sensors [ 16 ], biosensors [ 17 ], supercapacitors [ 18 ], neural prosthesis/biotic–abiotic interfaces [ 10 ], scaffolding [ 19 ], delivery systems [ 20 ], anti-corrosion materials [ 21 ], membrane gas separation [ 8 ] and solar cells [ 22 ]. During the polymerization of aniline monomer, PANI transforms into one of the three states of normalized oxidation: (a) leucoemeraldine (white/clear), (b) pernigraniline (blue/violet) and (c) emeraldine (salt- green/base-blue).…”

Recent progress in polyaniline-based chemiresistive flexible gas sensors: design, nanostructures, and composite materials

“…For example, reduced graphene oxide has more gas adsorption sites due to the oxygen functional groups attached to graphene nanosheets. [98][99][100][101] One-dimensional carbon bers can be easily combined with cotton fabrics to develop exible and wearable gas-sensing devices. 102,103 Multi-walled carbon nanotubes have high electrical conductivity and excellent mechanical properties.…”