Novel method for preparing hollow carbon spheres

Abstract

The invention relates to a novel method for preparing hollow carbon spheres. The method comprises specific steps as follows: (1) starch and a catalyst in the mass ratio being (10-1,000):1 are dissolved in a certain amount of water, and then the mixture is added to a stainless steel reaction kettle; (2) the stainless steel reaction kettle containing raw materials is placed into a heating furnace having a programmed heating function, the temperature is increased from the room temperature to 180-250 DEG C at the heating speed of 2-10 DEG C / min and kept for 1-8 h, then heating is stopped, and the reaction kettle is naturally cooled to the room temperature in the furnace; (3) a reaction liquid is subjected to suction filtration, products are washed with deionized water and dried at the temperature of 45-60 DEG C for 3-4 h finally, and finished products are obtained. The novel method for preparing the hollow carbon spheres has the advantages as follows: the starch, an amylolytic enzyme and the water are used as raw materials, and the hollow carbon spheres are prepared with a hydrothermal method; the method has the short reaction time and the simple technological process, the products, namely, the hollow carbon spheres, have good water solubility, and the hollow volume percentage is large.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic non-metallic materials, in particular to a novel method for preparing hollow carbon spheres. Background technique [0002] As a special carbon material, hollow carbon spheres have high chemical stability, low density, good high temperature heat resistance and biocompatibility, and can be used for catalyst carriers, electrode materials, supercapacitors, hydrogen storage materials, Drug delivery devices and templates for preparing other hollow materials are mainly used in the fields of materials science, medicine, pharmacy and coating industry. [0003] At present, the methods for preparing hollow carbon spheres mainly include: high-temperature pyrolysis of organic matter, vapor deposition, laser distillation, arc discharge, template method, etc. [0004] The existing preparation methods mainly have the following disadvantages: one, the synthesis process steps are complicated, the conditions...

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Problems solved by technology

[0004] The existing preparation methods mainly have the following disadvantages: one, the synthesis process steps are complicated, the conditions are harsh, and the cost is high; two, the monodispersity of the hollow carbon spheres synthesized by the prior art is not good, and the size of the carbon spheres is uncontrollable, which limits The application of hollow carbon spheres as drug carriers in the field of medicine

3. The purity of the synthesized hollow carbon spheres is not high, the template is not easy to remove, and it is easy to cause the hollow carbon spheres to collapse and break when the template is removed.