Nanostructured carbon–metal hybrid aerogels from bacterial cellulose

Abstract

Nanostructured carbon–metal hybrid aerogels by carbothermal reduction of nickel or iron hydroxide inside bacterial cellulose at remarkably low temperatures.

Biorefinery of Lignocellulosic Biomass from an Elm Clone: Production of Fermentable Sugars and Lignin‐Derived Biochar for Energy and Environmental Applications

“…In fact, the I D /I G value is significantly lower than the one of the commercial activated carbon Norit (1.92) . The spectrum of AH‐Enz‐py also displayed the 2D band at 2670 cm −1 , which is generally associated with the stacking order of graphene planes . The absence of this band in OSL‐py is a clear indication of the higher graphitic organization in AH‐Enz‐py, which is possibly related to the higher cellulose content in this residue.…”

“…[45] The spectrum of AH-Enz-py also displayed the 2D band at 2670 cm À 1 , which is generally associated with the stacking order of graphene planes. [13] The absence of this band in OSL-py is a clear indication of the higher graphitic organization in AH-Enz-py, which is possibly related to the higher cellulose content in this residue. This is somewhat opposed to findings reported by Deng et al [34] that observed a slightly higher graphitic degree of KHCO 3 activated carbon from alkaline lignin as compared to αcellulose.…”

“…An additional property sought in activated carbons is appreciable electrical conductivity, which is generally very low in these materials. Nevertheless, lignins and carbohydrates like cellulose can exhibit electrical conductivity upon pyrolysis, which makes them alluring for the production of advanced activated carbons. Thus, the activation process enhances the efficiency and stability of these porous carbons in energy applications like supercapacitors, or as adsorbents in water remediation .…”

Hierarchical growth of nickel oxyhydroxide on bacterial cellulose hydrogel: role of water channels in hydrogel to form hierarchical structure

“…However, long synthesis route and aging at 100°C for a prolonged period (24 hr) were utilized to form BC nickel hybrid. Moreover, the deposition of nickel contents on BC was in the form of fused particles rather than homogeneous coating having hierarchical structure to increase the specific surface area …”

“…Moreover, the deposition of nickel contents on BC was in the form of fused particles rather than homogeneous coating having hierarchical structure to increase the specific surface area. 36 Motivating with the overall performance of the aforementioned methods, herein, we are proposing a simple and solution-based method for growing hierarchical nickel oxyhydroxide (NiOOH) on the surface of BC (BC-NiOOH). Furthermore, the in situ formation mechanism is observed through confocal microscopy for the first time to study the formation of composite in the hydrogel form and proposed a formation mechanism of NiOOH on the nanofibers of BC in the form of hydrogel.…”