Biomass porous carbon/prussian blue composite material and preparation method thereof

Abstract

The invention provides a biomass porous carbon / prussian blue composite material and a preparation method thereof. The composite material mainly comprises C, N, O, K, Fe and Cl, main organic functionalgroups comprise cyano, hydroxyl, alkyl, benzene ring, a benzene ring substituent and the like, biomass porous carbon serves as a main body of the composite material, and prussian blue substances areattached to the surface layer and pores of the biomass porous carbon. The preparation method mainly comprises the following steps: (1) conducting pickling to remove metal ions; (2) conducting swellingmodification on biomass; (3) loading a porous carbon pore-forming agent and a Prussian blue reactant; (4) conducting drying and dehydrating; and (5) conducting controllable preparation of the biomassporous carbon / prussian blue composite material. The method can obviously lower the carbonization temperature in the process of preparing the functional material from the biomass, widens the raw material source of the biomass, saves the energy, and has the advantages of low cost and low pollution.

Description

technical field [0001] The invention relates to the field of preparation of functional materials by utilization of high added value of biomass, in particular to a biomass porous carbon / Prussian blue composite material and a preparation method thereof. Background technique [0002] Porous carbon material is an excellent carrier with stable structure and well-developed pore structure, which is widely used in the field of catalysis; Prussian blue is an organometallic complex containing iron, which has the advantages of superior catalytic performance, easy preparation, and low cost. , has a wide range of applications in electroanalytical chemistry, electrochromism, biosensors, electrocatalysis, etc. Combining porous carbon materials with Prussian blue to prepare a composite material can play a powerful role in the field of catalysis. [0003] The journal "Energy Conservation and Environmental Protection" published the research progress on the resource utilization of biomass was...

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Problems solved by technology

[0009] To sum up, there are still some deficiencies in the existing functional materials prepared from biomass, for example, the carbonization temperature in the preparation process is relatively high, generally above 800°C The implementation cost is high, the carbonization process is highly polluting, and most of the reaction processes have by-products and low conversion rates. Therefore, at this stage, a new technology for preparing functional materials from biomass is urgently needed to achieve low-cost and low-pollution preparation processes. The goal of high added value of products, to achieve this goal, reducing the carbonization temperature in the process of preparing functional materials from biomass is the key; For this type of good raw materials, for biomass with poor original structure, such as pig manure and other biomass, the performance of the prepared functional material is not good, which requires a preparation method that can be applied to most biomass; Thirdly, in the published documents, the biochar / Prussian blue composite material is generally prepared by two or more steps, such as: first prepare a carbon material with a developed specific surface area, and then load the Prussian blue reactant to react to obtain biochar / Prussian Blue Composite

Therefore, the current technology for the functional application of biomass is not perfect

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