Black titania nanotubes/spongy graphene nanocomposites for high-performance supercapacitors

El-Gendy, Dalia M.; Ghany, Nabil A. Abdel; Allam, Nageh K.

doi:10.1039/c9ra01539f

Cited by 27 publications

(12 citation statements)

References 53 publications

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“…The superiority in the water retention capacity of SGO-modified sample can be attributed to the great thermal stability. El-Gendy et al 73 reported that the first humidification step of SGO appeared at the range of 145 C to 173 C. Such degradation in this temperature range is higher compared with SiO 2 (occurring at around 80 C 74 ) and TiO 2 (occurring between 25 C and 80 C 75 ) and provides a better support in the water retention capacity of CS/SPVA15 composite membrane. The high water retention in inorganic fillermodified sample implies better support of ionic conduction at high temperature (operating temperature of PEMFC at F I G U R E 6 TGA curve of CS/SPVA15 composite membrane with various inorganic fillers >80 C), in which the absorbed water promotes the formation of ionic conducting channels via Grotthuss-type mechanism.…”

Section: Characterisation Of Inorganic Filler-modified Composite Memb...mentioning

confidence: 98%

Enhancement in hydrolytic stability and proton conductivity of optimised chitosan/sulfonated poly(vinyl alcohol) composite membrane with inorganic fillers

Wong

Loh

et al. 2021

Intl J of Energy Research

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Summary The study aimed to obtain a chitosan/sulfonated poly(vinyl alcohol) (CS/SPVA) membrane with optimised hydrolytic stability and ion conduction properties by using the Taguchi method. Three factor variables including concentration of glutaraldehyde (GA), crosslinking temperature and crosslinking time were considered. An L18 orthogonal array along with the approach of larger‐the‐better was selected for the optimisation. The highest value in S/N ratio of −19.9947 was observed on sample set 9 without GA involvement, crosslinking temperature of 110°C and time of 90 minutes. The ionic conductivity and water uptake were 8.21 mS/cm and 82.05%, respectively, compared to 7.34 mS/cm and 215.9% of the nonoptimised CS/SPVA15. Further inspection with the incorporation of inorganic fillers (titanium dioxide (TiO2), silicon dioxide (SiO2) and sulfonated graphene oxide (SGO)) was conducted on the optimised CS/SPVA15. The thermomechanical properties of CS/SPVA15 composite membrane was improved with inorganic fillers. In terms of electrochemical properties, ionic conductivity was reduced because of the enhancement in thermal stability. The inorganic filler inhibits the accessible functional groups and increase the ionic resistance of CS/SPVA15 composite membrane. Amongst all samples, CS/SPVA15‐SGO is the most optimised with a minor trade‐off in ionic conductivity (6.82 mS/cm) and IEC (0.8866 mequiv/g) compared with CS/SPVA15, whilst delivering an exceptional hydrolytic stability (76.41%).

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Section: Characterisation Of Inorganic Filler-modified Composite Memb...mentioning

confidence: 98%

Enhancement in hydrolytic stability and proton conductivity of optimised chitosan/sulfonated poly(vinyl alcohol) composite membrane with inorganic fillers

Wong

Loh

et al. 2021

Intl J of Energy Research

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“…e subject will use 47 infrared reflections attached to the corresponding positions on the body surface to determine the head and torso. Before the formal exercise test, the upper and lower limbs are doubled and statistical data are collected as required [14]. In this study, Weikang cameras were used for sampling.…”

Section: Experiments Of Tai Chi On Knee Jointmentioning

confidence: 99%

High Boron Silicon Nanotubes Combined with Tai Chi Exercise Rehabilitation Therapy in the Treatment of Knee Arthritis Patients

2020

Journal of Chemistry

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Tai Chi exercise is gentle, convenient, and easy to learn. It is more economical than traditional medical treatments, and it is regarded as the first choice for rehabilitation therapy by patients with knee arthritis. This article aims to study Tai Chi exercise rehabilitation therapy combined with high boron silicon nanotubes to treat knee arthritis patients. This article mainly introduces the treatment of knee arthritis patients with Tai Chi, which is reflected in the improvement of patients’ walking ability and stability, and explores a three-dimensional motion model to provide better help for patients with knee joints. The article uses data mining methods to collect data on the gene expression of human knee joints and analyzes the causes of knee arthritis caused by its internal structure. The experimental results of this paper show that, under Taijiquan exercise rehabilitation treatment, the time needed by knee arthritis patients to get up and run is reduced by 14%, the standing time of one leg is significantly improved, the fall rate is reduced by 13%, and the body’s static balance ability is improved.

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“…In this regard, various compositions of rGO and MOs such as manganese oxide (MnO), 19 zinc oxide (ZnO), 20 iron oxide (Fe 2 O 3 ), 21 titanium oxide (TiO 2 ), 22 cobalt oxide (CoO), 23 nickel oxide (NiO), 24 ruthenium oxide (RuO 2 ), 25 and tin oxide (SnO 2 ) 26 or CPs such as polypyrrole (PPY), 27 polyaniline (PANI), 28 and polythiophene (PTh) 29 have been proved as potential electrode materials to improve the capacitance. In our previous works, we have also reported rGO‐CPs 30 and rGO‐ZnO 31 based composites with the highest capacitance of 365.5 F/g.…”

Section: Introductionmentioning

confidence: 99%

Rhinestone sheet like carbon and metal oxide‐based nanocomposites for flexible supercapacitor applications

Chaudhary

Sinha

Mohan

2022

Intl J of Energy Research

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Summary The increasing thrust lies in developing a better electrode material for supercapacitor applications. Carbon and metal oxide‐based nanocomposites are the latest trend in this research area. In the present work, we are proposing the synthesis of simple, eco‐friendly and cost‐effective reduced graphene oxide (rGO), naturally derived carbon dots (CDs), and zinc oxide (ZnO)‐based rZD ternary nanocomposites. These nanocomposites have been synthesized using eco‐friendly and accessible hydrothermal method at three different temperatures (i.e., 300, 400, and 500°C) and accordingly named as rZD300, rZD400, and rZD500. Further, the morphological (scanning electron microscopy and transmission electron microscopy) characterization studies predicted that ZnO and CDs were attached on to the rGO nanosheets to form the rhinestone sheet like structures. In addition, the crystalline and structural properties have been examined using X‐ray diffraction, Raman, X‐ray Photoelectron Spectroscopy, and X‐ray Absorption Spectroscopy. The electrochemical studies (cyclic voltammetry, galvanostatic charge‐discharge, and electrochemical impedance spectroscopic) predicted that highest capacitance achieved was 796 F/g using 2 M H2SO4 electrolytic solution for rZD500 nanocomposite. Finally, 1.5 V prototype flexible Supercapacitors (FSC) have been also fabricated using carbon cloth substrate for rZD500nanocomposite.

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Black titania nanotubes/spongy graphene nanocomposites for high-performance supercapacitors

Abstract: A simple method is demonstrated to prepare functionalized spongy graphene/hydrogenated titanium dioxide (FG-HTiO2) nanocomposites as interconnected, porous 3-dimensional (3D) network crinkly sheets.

Cited by 27 publications

References 53 publications

Enhancement in hydrolytic stability and proton conductivity of optimised chitosan/sulfonated poly(vinyl alcohol) composite membrane with inorganic fillers

Enhancement in hydrolytic stability and proton conductivity of optimised chitosan/sulfonated poly(vinyl alcohol) composite membrane with inorganic fillers

High Boron Silicon Nanotubes Combined with Tai Chi Exercise Rehabilitation Therapy in the Treatment of Knee Arthritis Patients

Rhinestone sheet like carbon and metal oxide‐based nanocomposites for flexible supercapacitor applications

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