A kind of sludge carbon-based nano-cluster magnesium oxide catalyst and its preparation method and application

Abstract

The invention discloses a sludge carbon-based nano-cluster magnesium oxide catalyst, a preparation method and an application. Including the following steps: S1. Using sludge as a precursor material, adding a pore-forming agent to prepare a tertiary pore sludge carbon material, denoted as SC PS‑M ; S2. Put SC PS‑M The surface carboxylation treatment is carried out with an oxidizing agent, and after the treatment is completed, it is dried, and the obtained material is denoted as SC PS‑M (AR); S3. Put SC PS‑M (AR) is added to the magnesium nitrate solution as an adsorbent to adsorb magnesium ions and form magnesium carboxylate on the surface of porous sludge carbon, and the obtained material is denoted as Mg 2+ / SC PS‑M (AR); S4. Mg 2+ / SC PS‑M (AR) is calcined to dehydrate the carboxyl groups to form nano-magnesia clusters on the surface of the porous sludge carbon material to obtain the sludge carbon-based nano-cluster magnesium oxide catalyst, denoted as MgO / SC PS‑M (AR). The method of the present invention not only controls the nucleation position of the catalyst, but also ensures the uniformity of magnesium oxide on the surface of the precursor material; and the formed magnesium oxide is all nano-sized particles, which can maintain the multi-level of the precursor material to the greatest extent. Pore ​​structure, the catalytic efficiency of the catalyst is high.

Description

technical field [0001] The invention relates to the technical field of magnesium oxide catalysts, in particular to a sludge carbon-based nano-cluster magnesium oxide catalyst and its preparation method and application. Background technique [0002] Magnesium oxide catalyst has an excellent catalytic effect on ozone oxidation, but because it exists in the form of powder, it is difficult to separate after use, which seriously hinders its practical promotion and application. Therefore, in order to solve the above defects, a magnesium oxide-supported catalyst has appeared. [0003] At present, the preparation of magnesium oxide-supported catalysts is usually carried out by traditional deposition-precipitation method, but in the process of precipitation, it is difficult to control the nucleation position of the catalyst, and the catalyst particles formed by loading are large, low in uniformity, and easy to block. The gaps in the carrier cause fewer catalytic sites, and the magnes...

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Problems solved by technology

[0002] Magnesium oxide catalyst has excellent catalytic ozone oxidation effect, but because it exists in the form of powder, it is difficult to separate after use, which seriously hinders its practical promotion and application. Therefore, in order to solve the above defects, a magnesium oxide supported catalyst has emerged

[0003] At present, the preparation of magnesia-supported catalysts is usually prepared by the traditional deposition-precipitation method, but in the process of precipitation, it is difficult to control the nucleation position of the catalyst, and the catalyst particles formed by loading are large, low in uniformity, and easy to block. The gaps in the carrier lead to fewer catalytic sites, and the magnesia loaded on the surface of the carrier is prone to agglomeration, resulting in a decrease in catalytic efficiency, and the prepared magnesia-supported catalyst has disadvantages such as poor repeatability.

[0004] Although the magnesia-supported catalyst is intersected with magnesia powder, the catalytic efficiency and application have been improved to a certain extent, but the shortcomings of the above-mentioned magnesia-supported catalyst still need to be improved urgently, which will be more conducive to the promotion of magnesia-supported catalysts Applications

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