Graphene beaded carbon nanofibers/ZnO/polyaniline nanocomposites for high performance supercapacitor

Atram, Rounak R.; Manekar, Bhawana A.; Kondawar, Subhash B.; Atram, R. G.; Koinkar, Pankaj

doi:10.1142/s0217984919400165

Cited by 14 publications

(2 citation statements)

References 18 publications

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“…Recently, the ZnO NFs have become an attractive material for sensors due to their physical, functional, and structural properties. [24] NFs are used in batteries, [25,26] fuel cells [27] and supercapacitors [28,29] in the energy sector; in dust filters, [30,31] water filters, [32,33] face masks, [34] and photocatalysis [35,36] in the environment sector; and in drug delivery, [37] tissue engineering, [38] and wound dressing in the health care sector. [39] Fig.…”

Section: Electrospinning Of Nanofibersmentioning

confidence: 99%

Electrospun ZnO Nanofiber Based Resistive Gas/Vapor Sensors -A Review

Prabhu¹,

Chandra²,

Rajendra³

et al. 2022

Eng. Sci.

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Resistive zinc oxide (ZnO) sensors play a pivotal role in detecting various gases and vapors due to their high response, low cost, stability, tunability, and simple fabrication. Hence, it is necessary to know the recent status of research in resistive ZnO sensors. The sensitivity is determined by the reactions at the surface of the nanofiber (NF); therefore, the surface area defines the foremost sensor characteristics. Electrospun metal oxide NFs exhibit a high surface area and unique electrical properties that can be tuned, and they are highly sought as the materials for resistive gas sensors. So far, various strategies are adopted to improve the sensitivity and the selectivity of ZnO NFs. This review summarizes the recent methods utilized by various researchers to improve the sensitivity of the ZnO electrospun metal oxide NF-based resistive gas sensors. Also, it discusses the influence of process parameters on the structure and morphology of ZnO NFs, the mechanism of gas sensing and highlights its improvement through advanced methods. The sensitivity of the NF has been improved through tuning the structure and morphology of NFs and doping. Further, modification of NF sensitivity through functionalization, the addition of carbon nanomaterials, and high-energy irradiation are also discussed. Based on the recent literature, the performance of doped ZnO NF for various gas sensing is highlighted. The outcome of this review gives insight to academic researchers and industry for further investigation and development in resistive gas sensors and its applications.

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Section: Electrospinning Of Nanofibersmentioning

confidence: 99%

Electrospun ZnO Nanofiber Based Resistive Gas/Vapor Sensors -A Review

Prabhu¹,

Chandra²,

Rajendra³

et al. 2022

Eng. Sci.

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“…Yang et al 2020). High-performance supercapacitors were produce by incorporating graphene beaded carbon nanofibers, zinc oxide and polyaniline nanometers into composite films as high-performance supercapacitors (Atram et al 2019). Many other MFC or CNF-based films have also been modified for sustainable packaging, water treatment, energy storage and even biomedical tissue engineering (Assis et al 2020;Tong et al 2020;H.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cellulases on BHKP Fibers during Pretreatment for MFC Film Preparation

Zhang

Wang

Yan

et al. 2021

Preprint

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Adsorption of cellulase on fibers is a key factor in determining its efficiency on fiber treatment and microfibrillated cellulose (MFC) preparation. Different adsorption behavior, treatment efficiency and performance of MFC and MFC film were observed due to the different properties of cellulases. Herein, bleached eucalyptus kraft pulp (BHKP) was pretreated by complex cellulase (D cellulase) and endocellulase (R cellulase) with different dosages for MFC preparation. Enzyme activity, adsorption ratio, adsorption kinetics and adsorption thermodynamic of the two cellulases were comprehensively studied, and the impacts of the cellulase pretreatment on the properties of MFC and MFC film were investigated. The results showed that D cellulase possessed higher adsorption ratio than R cellulase, but R cellulase demonstrated higher adsorption rate than D cellulase. High temperature discouraged the adsorption of the two cellulases because of their exothermic natures. The crystallinity index (CrI), specific surface area (SSA) and morphology of MFC were tuned by the combination of two cellulases at different dosages. The CrI of MFC treated by D cellulase and R cellulase increased from 40.45% to 66.50% and 66.67% respectively when the cellulase dosage was 10 U/g. The elongation at break (E) and tensile strength (TS) of MFC film treated by D cellulase were decreased first and then increased slightly, but the MFC film treated by R cellulase decreased continuously. The MFC film prepared by D cellulase possessed the best barrier property at 20 U/g and the corresponding oxygen permeability coefficient was 4.37×10-14 cm3·cm/cm2·s·Pa. However, the oxygen permeability coefficient of MFC film pretreated by R cellulase at a dosage of 10 U/g was 4.13×10-14 cm3·cm/cm2·s·Pa. This work shows that R cellulase was more suitable than D cellulase for BHKP pretreatment to prepare MFC film.

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