Micro/nano-structure carbon adsorbent and preparation method thereof

Abstract

The invention discloses a micro / nano-structure carbon adsorbent and a preparation method thereof. The adsorbent is a sheet cluster compounded by hybridizing 25-40 mol% of ferriferrous sulfide and 60-75 mol% of carbon, wherein the diameter of the sheet cluster is 8-12 mu m, and the specific area is 11-13 m<2> / g; the sheets in the sheet cluster are bent or folded sheets which are 5-15 mu m long and 8-12 nm thick; and the carbon is composed of 85-95 wt% of amorphous carbon and 5-15 wt% of graphitized carbon. The method comprises the following steps: sequentially dissolving iron chloride hexahydrate and thioacetamide in ethylene glycol to obtain a mixed solution; adding glucose into the mixed solution, and stirring to obtain a precursor solution; reacting the precursor solution in a closed state at 140-180 DEG C for at least 2 hours to obtain a reaction solution; and carrying out solid-liquid separation on the reaction solution, washing, and drying to obtain the target product. The micro / nano-structure carbon adsorbent has favorable adsorption and desorption properties, and can be widely used for treating water pollution.

Description

technical field [0001] The invention relates to a carbon adsorbent and a preparation method thereof, in particular to a micro-nano structured carbon adsorbent and a preparation method thereof. Background technique [0002] With the increasingly prominent problem of environmental pollution, it is particularly important to adopt simple and convenient methods for environmental governance. At present, there are mainly the following methods for water pollution treatment: one is physical method, such as filtration method, or the method of using adsorbent adsorption, etc.; the other is chemical method, that is, the method of degrading pollutants through chemical reaction. degradation or catalytic degradation of semiconductor photocatalysts, etc.; the third is the biological method, which uses the biochemical action of microorganisms to treat pollutants. Chemical and biological methods will inevitably generate by-products and cause secondary pollution, while adsorption in physical ...

AI Technical Summary

Problems solved by technology

Recently, most of the adsorption materials that people often use are nano-scale powder materials, which are prone to agglomeration during the adsorption process and reduce the adsorption effect, and it is difficult to separate from the water phase after adsorption, so they cannot be reused.

Although there are also powdery materials with micro-nano structure, such as 3D Fe 3 S 4 flower-1ike microspheres: high-yield synthesis Via abiomo1ecule-assisted so1ution approach, their electrical, magnetic and electrochemical hydrogen storage properties, Dalton Transactions, 2009, 9246-9252 (three-dimensional iron tetrasulfide microspheres: high yield of biomolecular assisted solution method Synthesis, research on electricity, magnetism and electrochemical hydrogen storage properties, Dalton Journal, September 2009) a kind of triiron tetrasulfide flower-shaped microspheres and its preparation method disclosed on pages 9246-9252 of the article, mentioned in the article The diameter of the microsphere is about 3-4μm, which is composed of many nanosheets with a thickness of 20-30nm. The preparation method is to dissolve L-cysteine ​​in deionized water, and add trisulfide tetrasulfide under continuous vigorous stirring Iron (Fe 3 S 4 ) aqueous solution, the resulting solution was magnetically stirred and then transferred to an autoclave, heated at 200°C for 24 hours, cooled and washed with deionized water and ethanol several times and then dried to obtain the final product; however, this micro-nano structure The powdery material and its preparation method still have deficiencies. First of all, the diameter of the microspheres is slightly smaller, and the surface of the nanosheets is too flat and the thickness is also a little larger, which makes it unfavorable for adsorption of pollutants. The separation between water and the specific surface area are limited to a certain extent, which affects the effect of adsorption; secondly, the preparation method can neither obtain a suitable size micro-nano structure material for water pollution treatment, but also has the disadvantage of energy and time-consuming

Images