Arginine-functionalized graphene oxide for green and high-performance symmetric supercapacitors

Haghshenas, Mahnoosh; Mazloum-Ardakani, Mohammad; Sabaghian, Fariba

doi:10.1016/j.ijhydene.2021.06.170

Cited by 25 publications

(2 citation statements)

References 43 publications

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“…Some variation in capacitance is expected due to differing degrees of oxidation/reduction of the GO/RGO structures (Figure 1a,b) that result in disproportional conductive, nonconductive, and oxygenated or other heteroatom functionalized graphene sp 2 /sp 3 carbon components, and accessible porosity of the graphenic framework for facilitating charge storage and its dynamics. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][44][45][46][47][48][49][50][51][52][53] Other factors (Figure 1c; Table S1, Supporting Information) that can affect the overall capacitance performance include electrode preparation routes resulting in different mass-loadings and thicknesses (ultra-low mass loadings or ultrathin layers of active materials often show high capacities over thicker counterparts due to enhanced charge and mass transfer). [53,…”

Section: Introductionmentioning

confidence: 99%

Understanding and Optimizing Capacitance Performance in Reduced Graphene‐Oxide Based Supercapacitors

Gadipelli

Guo

et al. 2023

Small Methods

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Reduced graphene-oxide (RGO)-based electrodes in supercapacitors deliver high energy/power capacities compared to typical nanoporous carbon materials. However, extensive critical analysis of literature reveals enormous discrepancies (up to 250 F g −1 ) in the reported capacitance (variation of 100-350 F g −1 ) of RGO materials synthesized under seemingly similar methods, inhibiting an understanding of capacitance variation. Here, the key factors that control the capacitance performance of RGO electrodes are demonstrated by analyzing and optimizing various types of commonly applied electrode fabrication methods. Beyond usual data acquisition parameters and oxidation/reduction properties of RGO, a substantial difference of more than 100% in capacitance values (with change from 190 ± 20 to 340 ± 10 F g −1 ) is found depending on the electrode preparation method. For this demonstration, ≈40 RGO-based electrodes are fabricated from numerous distinctly different RGO materials via typically applied methods of solution (aqueous and organic) casting and compressed powders. The influence of data acquisition conditions and capacitance estimation practices are also discussed. Furthermore, by optimizing electrode processing method, a direct surface area governed capacitance relationship for RGO structures is revealed.

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Section: Introductionmentioning

confidence: 99%

Understanding and Optimizing Capacitance Performance in Reduced Graphene‐Oxide Based Supercapacitors

Gadipelli

Guo

et al. 2023

Small Methods

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“…In this study, a facile and efficient approach has been utilized to synthesize 3D graphene/ l -arginine (3DGA) composite with open porous architectures via the reduction of graphene oxide (GO) with l -arginine. − According to earlier studies, numerous types of reducing agents have been employed to reduce GO. However, the toxicity and hazardous nature of the majority of chemical compounds remain always a concern. , l -arginine has been chosen as a green reducing agent owing to its low cost, abundance, and environmentally friendly nature. − The fabricated 3DGA-based conductometric pH microsensor achieved a sensitivity of 97 μS/pH and response of 650% with buffer solutions over the pH range of 3–10. The same microsensor is used to examine the pH of soil solutions prepared using deionized water and with different concentrated (1–20 mM) solutions of calcium chloride (CaCl 2 ).…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Conductometric Network Based on Reduced Graphene Oxide for Soil pH Sensors

Siddiqui

Aslam

2023

ACS Appl. Nano Mater.

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In this work, we have synthesized l-arginine-functionalized 3D macroporous graphene, formed through the assembling of reduced graphene oxide nanosheets. The soil pH microsensor is fabricated on the patterned Si/SiO2 substrates with Au-interdigitated electrodes employing 3D graphene/l-arginine structure as a sensing platform. The sensor exhibits an increase in conductance toward an increase in pH of the buffer solutions (pH = 3–10) with a sensitivity of 97 μS/pH and response of 650%. The room-temperature pH sensing measurements are performed to detect the pH variations in different types of soil samples. The conductance of the sensor is correlated to the change in soil pH with increase of gravimetric moisture contents displaying a sensitivity of 105 μS/pH and 98 μS/pH for black soil and red soil, respectively. The sensor effectively detects soil pH changes against varying concentrations of CaCl2 solution (1–20 mM) with a sensitivity of 121 μS/pH (black soil) and 101 μS/pH (red soil). In comparison to the commercial pH meter, the 3D graphene/l-arginine-based microsensor demonstrates a relative standard deviation of less than 4% in soil pH sensing measurements. The designed pH sensor displays an excellent response with good reversibility, satisfactory linearity, low hysteresis (3%), a response time of 30–35 s, and stability of around 2 months.

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Fabrication and investigation antibacterial properties of green cross-linked PVA/GO/L-Arg-Cu electrospun nanofiber

Amoee,

Monad,

Hamidinezhad

et al. 2024

Polym. Bull.

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Arginine-functionalized graphene oxide for green and high-performance symmetric supercapacitors

Cited by 25 publications

References 43 publications

Understanding and Optimizing Capacitance Performance in Reduced Graphene‐Oxide Based Supercapacitors

Understanding and Optimizing Capacitance Performance in Reduced Graphene‐Oxide Based Supercapacitors

Three-Dimensional Conductometric Network Based on Reduced Graphene Oxide for Soil pH Sensors

Fabrication and investigation antibacterial properties of green cross-linked PVA/GO/L-Arg-Cu electrospun nanofiber

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