A kind of hydrothermal carbon-based composite material, its preparation and application

A technology of composite materials and hydrothermal carbon, which is applied in the direction of water pollutants, other chemical processes, water/sewage treatment, etc., can solve the problems of poor adsorption effect and difficult availability of heavy metal raw materials, etc., and achieve improved pore size controllability, ratio The effect of increasing the surface area and improving the adsorption effect

Active Publication Date: 2020-12-29
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a hydrothermal carbon-based composite material, its preparation and application, which adds a metal-organic framework precursor during the preparation of hydrothermal carbon, so that hydrothermal carbon and Metal-organic frameworks are organically combined to obtain hydrothermal carbon-based composite materials, which can improve its adsorption capacity for heavy metals, thereby solving the technical problems of the existing hydrothermal carbon-based composite materials that are not easy to obtain raw materials for adsorption of heavy metals, and the adsorption effect is not good

Method used

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  • A kind of hydrothermal carbon-based composite material, its preparation and application
  • A kind of hydrothermal carbon-based composite material, its preparation and application
  • A kind of hydrothermal carbon-based composite material, its preparation and application

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preparation example Construction

[0026] A method for preparing a hydrothermal carbon-based composite material provided by the invention comprises the following steps:

[0027] (1) Mixing the biomass with the metal-organic framework material precursor solution to obtain a raw material mixture;

[0028] (2) The raw material mixture is subjected to a hydrothermal reaction in a closed reactor, during which the carbonization of the biomass and the crystallization reaction of the metal-organic framework material take place; after the hydrothermal reaction is completed, the solid-liquid separation is After the obtained solid material is cleaned and dried, the hydrothermal carbon-based composite material is obtained.

[0029] The particle size of the biomass raw material affects the physical properties of the formed hydrothermal carbon, thereby affecting its recombination with the metal-organic framework. Controlling the particle size within the above range can effectively make the growth process of the metal-organic...

Embodiment 1

[0054] The specific surface area and pore structure of the hydrothermal carbon and the hydrothermal carbon-based composite material in Example 1 are as follows:

[0055] Table 1

[0056]

[0057] The adsorption efficiency of hydrothermal carbon and hydrothermal carbon-based composite materials to various heavy metals in the liquid phase in Example 1 is as follows:

[0058] Table 2

[0059]

Embodiment 2

[0061] A method for preparing a hydrothermal carbon-based composite material, comprising the steps of:

[0062] (1) Grinding the stalks into fine particles after air-drying;

[0063] (2) Dissolve aluminum nitrate nonahydrate and trimesic acid in a certain proportion in the reaction solvent respectively, mix them well, the solvent is deionized water, the mass ratio of aluminum nitrate nonahydrate and trimesic acid to solvent is 5:1 :8;

[0064] (3) Add the straw granules in step 1 to the mixed solution prepared in step 2, and mix thoroughly; the mass ratio of the straw to the mixed solution is 1:1;

[0065] (4) Put the mixed solution prepared in step 3 into a closed reaction kettle with a stirrer for carbonization and crystallization reaction, the heating rate is 5°C / min, the reaction temperature is 250°C, the reaction time is 48h, and the stirring rate 300rpm.

[0066] (5) After cooling, the solid obtained in step 4 was collected by centrifugation, and washed 3 times with d...

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Abstract

The invention belongs to the technical field of composite materials, and particularly relates to a hydrothermal carbon-based composite material and preparation and application thereof. Biomass is mixed with a precursor solution of a metal organic skeleton material to obtain raw material mixed liquid; the raw material mixed liquid is subject to a hydrothermal reaction in a closed reactor, and carbonization of the biomass and a crystallization reaction of the metal organic skeleton material are conducted in the process of the hydrothermal reaction; and after the hydrothermal reaction is completed, solid-liquid separation is conducted, and an obtained solid material is cleaned and dried to obtain the hydrothermal carbon-based composite material. Through a metal organic skeleton precursor is added during the preparation of hydrothermal carbon, the hydrothermal carbon and a metal organic framework are organically combined to obtain the hydrothermal carbon-based composite material, the adsorption capacity of the hydrothermal carbon-based composite material to heavy metals is improved, so as to solve the technical problems that hydrothermal carbon-based composite materials in existing technology are not prone to being obtained and the adsorption effect is not good.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and more specifically relates to a hydrothermal carbon-based composite material, its preparation and application. Background technique [0002] Water pollution and its treatment have received extensive attention in recent years. Among them, heavy metals are listed as key control targets due to their high toxicity, easy enrichment, and difficult to degrade. Adsorption is a convenient, effective, and easy-to-operate method for treating heavy metals in liquid phase, and the key lies in the selection and improvement of adsorbents. Hydrothermal charcoal is prepared from biomass or other carbon-containing raw materials by hydrothermal method. Because of its rich surface functional groups, low energy consumption in the preparation process, and greenness, it has the potential to be used as a green adsorbent for liquid pollutants. In order to improve its adsorption performance, many studies ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/226B01J20/3071B01J20/3085B01J2220/4825C02F1/288C02F2101/20
Inventor 邵敬爱张俊杰黄丹茹张雄张世红王贤华杨海平陈汉平
Owner HUAZHONG UNIV OF SCI & TECH
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