Activation‐Induced Surface Modulation of Biowaste‐Derived Hierarchical Porous Carbon for Supercapacitors

Abstract

Wheat straw-derived carbon from the Wheatbelt region in Western Australia was subjected to chemical activation in an electrolyte containing either acid or base treatment. The findings showed an increase in electron/hole mobility towards the interfaces due to the presence of different surface functional groups such as CÀ SO x À C and S=C in the carbon framework for acid activation. Likewise, the galvanostatic capacitance measured at a current density of 2 mA cm À 2 in a three-electrode configuration for acid-activated wheat straw exhibited 162 F g À 1 , while that for base-activated wheat straw exhibited 106 F g À 1 . An increase of 34.5 % more capacitance was achieved for acid-treated wheat straw. This improvement is attributed to the synergistic effects between surface functional groups and electrolyte ions, as well as the electronic structure of the porous electrode.

Sweet-Potato-Vine-Based High-Performance Porous Carbon for Methylene Blue Adsorption

“…Among them, porous carbon (PC) is considered a potential dye adsorbent owing to its abundant pore structure, high specific surface area, and excellent adsorbability [ 9 ]. In recent years, the preparation of PC through renewable and cost-effective biomass as a basic material has arisen great interest, for example, rice husk [ 10 ], wheat straw [ 11 ], pomelo peel [ 12 ], cotton stalk [ 13 ], bagasse [ 14 ], etc. [ 15 ].…”

Ru Nanoparticles Supported on Mesoporous Al‐SBA‐15 Catalysts for Highly Selective Hydrogenation of Furfural to Furfuryl Alcohol

“…Furfural is obtained from the arabinose and xylose components of hemicellulose by solvothermal treatment or acid dehydration and is obtained from agricultural and forestry residues such as corn cobs, sugarcane bagasse, rice husks, felled wood, and wheat bran. It is a renewable resource due to its high hemicellulose content and easy availability [5–7] …”

“…It is a renewable resource due to its high hemicellulose content and easy availability. [5][6][7] Furfural, a key intermediate for key chemicals and biofuels, is produced by the acidic dehydration of biomass-derived hemicellulose. [4,8] Furfural is also listed by the U.S. Department of Energy as one of the most important platform chemicals.…”

Constructing Abundant Oxygen-Containing Functional Groups in Hard Carbon Derived from Anthracite for High-Performance Sodium-Ion Batteries

“…They have been recognized as the preferred anode material for SIBs [16]. At present, the use of precursors in large amounts and at a low cost is one of the common methods to produce hard carbon materials, such as coal [17][18][19], resin [20][21][22], asphalt [23], and oxygen-rich biomass [24][25][26]. As a natural mineral with the greatest amount of carbon, coal is rich in resources and is mainly used in power, chemical, and other energy-intensive industries.…”