Physalis alkekengi persistent calyx bio-based carbon material and preparation method thereof

Abstract

Disclosed is a physalis alkekengi persistent calyx bio-based carbon material. Taking persistent calyx of physalis alkekengi as a raw material, after acid and / or alkali treatment, under the atmosphere of inert gas, the bio-based carbon material which retains a corresponding multi-pipe structure is obtained through high-temperature pyrolysis and carbonization. A preparation method of the physalis alkekengi persistent calyx bio-based carbon material comprises the steps that persistent calyx of physalis alkekengi is cleaned, soaked in a 0-6 mol / L acid and / or alkali aqueous solution for 0-48 hours, and then cleaned with distilled water, and drying is conducted to obtain a physalis alkekengi persistent calyx biomass precursor; pyrolysis and carbonization are conducted on the obtained physalis alkekengi persistent calyx biomass precursor under the protection of inert gas such as N2 or Ar at 450-900 DEG C for 0.5-8 hours. The bio-based carbon material can serve as a template material to prepare various inorganic, organic or inorganic-organic composite materials and the like which are in hollow hole-path shapes. The preparation method of the carbon material is simple, and easy to operate and control, the sources of the raw materials are wide, the cost is low, and the environment is not polluted.

Description

technical field [0001] The invention relates to a carbon material and a preparation method thereof. Background technique [0002] Due to the advantages of renewable raw materials, wide sources, low price and no pollution, bio-based carbon materials have become the source and research hotspot of new carbon materials, and have been widely used in many fields, such as supercapacitors, fuel cells, lithium-ion batteries , adsorption materials, photocatalytic composite materials, molecular sieve membranes and catalyst carriers, etc. [0003] The preparation methods of bio-based carbon materials mainly include hydrothermal carbonization method and direct carbonization method. The direct carbonization method is to crack the biomass precursor by heating it to 300-1000°C in an oxygen-free environment. The carbon material produced has high conductivity and large specific surface area. The cracking conditions are divided into slow cracking, medium cracking and fast cracking, which are...

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Problems solved by technology

[0004] Although there are biomass such as various flowers, peanut shells, durian shells, wild jujube shells, lotus leaves, Spirogyra, pomelo peels and camellia seed shells [8] etc., have been made into carbon materials with different shapes and properties, but they are still far from meeting the needs of current scientific and technological progress and social development.

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