A new strategy of spray pyrolysis to prepare porous carbon nanosheets with enhanced ionic sorption capacity

Abstract

We developed a new synthetic strategy to control the microstructure of carbon particles via ultrasonic spray pyrolysis. Porous carbon nanosheets with high ion-sorption capacitance were prepared by the one-pot spray pyrolysis process.

Oxygen and Nitrogen Co‐enriched Sustainable Porous Carbon Hollow Microspheres from Sodium Lignosulfonate for Supercapacitors with High Volumetric Energy Densities

“…Because of different precipitation behavior of SLS and NaOH, the hydroxide NaOH was precipitated dispersedly at the SLS/NaOH composite shell and intensively in the core. [50,51] The dispersedly precipitated NaOH at the shell may be ultrafine nanoparticles with a size of 10-100 nm due to the ultrafast precipitation process, while much larger particle size could be obtained for intensively precipitated NaOH in the core with a relative longer precipitation time. During the subsequent thermal stabilization process, SLS was crosslinked to form a rigid precursor with NaOH crystals embedded in and acting as a hard template.…”

“…It can be speculated that during the spray drying procedure, fast‐water‐evaporation‐induced surface co‐precipitation of SLS and NaOH resulted in a SLS/NaOH composite shell. Because of different precipitation behavior of SLS and NaOH, the hydroxide NaOH was precipitated dispersedly at the SLS/NaOH composite shell and intensively in the core ,. The dispersedly precipitated NaOH at the shell may be ultrafine nanoparticles with a size of 10–100 nm due to the ultrafast precipitation process, while much larger particle size could be obtained for intensively precipitated NaOH in the core with a relative longer precipitation time.…”

Optimization of Oil Adsorption Capacity by Aerogel Powder Synthesized Using Emulsion Droplets as Micro-reactors in Ambient Conditions from Sodium Silicate as Precursor

“…Porous materials have attracted wide attention because of their useful functionalities and microstructures for various applications in including catalytic supports, thermal insulators, sound absorbers, adsorbents, energy materials, and separation membranes [1][2][3][4][5][6]. For several decades, the synthesis routes of porous materials have typically involved chemical approaches, such as the hydrothermal method, sol-gel method, and gasphase synthesis like the spray pyrolysis method [7][8][9][10].…”

Improved porosity and ionic sorption capacity of carbon particles prepared by spray pyrolysis from an aqueous sucrose/NaHCO3/TEOS solution

“…[31][32][33][34][35][36][37] Among those, the spray pyrolysis is considered as a potential technique for the preparation of porous carbon because it has several advantages including continuous operation, one-step synthesis in a short time less than several seconds, spherical morphology and relatively narrow particle size distribution. When carbons are prepared by the spray pyrolysis, the microstructure and porosity can be easily controlled by the selection of the carbon source or by changing the additive and its concentration.…”

“…When carbons are prepared by the spray pyrolysis, the microstructure and porosity can be easily controlled by the selection of the carbon source or by changing the additive and its concentration. The carbon sources frequently used in the spray pyrolysis are sucrose, [36][37][38] phenolic resin, 34,39 alkali benzoates 32 and alkali propiolates (HC^CCO 2 -M, M ¼ Li, Na and K). 31,33 Also, surfactants or colloidal particles can be used as an additive to control the pore size.…”