Effect of hydrothermal conditions on production of coal organic microspheres

Zheng, Qingxin; Morimoto, Masato; Sato, Hiroaki; Takanohashi, Toshimasa

doi:10.1016/j.fuel.2018.08.002

Cited by 5 publications

(1 citation statement)

References 53 publications

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“…In recent years, due to the depletion and overexploitation of non-renewable natural resources, the development of functional materials from renewable resources, such as biomass, has become crucial. Biomass (such as glucose, sucrose, fructose, starch, cellulose and rubber wood) [9][10][11][12][13] and other raw materials such as benzene, toluene, acetylene and intermediate asphalt extracted from coal or petroleum [14][15][16][17] have been used as carbon precursors to prepare carbon microspheres with uniform particle size and high dispersion via hydrothermal synthesis method. Sun et al [18] prepared colloidal carbon microspheres with particle size of 150−1500 nm via hydrothermal reaction at 160-200 • C with glucose as the raw material.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Carbon Microspheres from Waste Office Paper

Yang,

Su,

Fang

et al. 2023

Molecules

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As a kind of biomass resource, waste office paper can be used as a carbon precursor to prepare carbon materials. In this work, carbon microspheres with regular shape, uniform particle size and high carbon content were successfully prepared from waste office paper via a hydrothermal synthesis method with sulfuric acid as the catalyst. The effects of reaction temperature and sulfuric acid dosage on the morphology of the carbon microspheres were studied. The formation mechanism of the carbon microspheres was investigated by analyzing the structure and composition of the products. The results show that the hydrolysis of cellulose in waste paper under hydrothermal conditions was the key for the formation of carbon microspheres. The temperature of hydrothermal reaction and the use of sulfuric acid can affect the morphology of carbon microspheres. The carbon microspheres synthesized at 210 °C with 10 mL sulfuric acid have the best surface morphology, with uniform particle size and higher dispersion. Cyclic voltammetry and electrochemical impedance spectroscopy show that the carbon microspheres have good capacitance performance and can be used in capacitors. This study provides a low-cost precursor for carbon microspheres as well as a new method for the recycle of waste paper.

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