Sludge carbon-based nanocluster magnesium oxide catalyst, preparation method and applications thereof

Abstract

The invention discloses a sludge carbon-based nanocluster magnesium oxide catalyst, a preparation method and applications thereof. The preparation method comprises the following steps: S1, adding a pore-forming agent to sludge used as a precursor material to prepare a three-level pore sludge carbon material, and recording the three-level pore sludge carbon material as SCPS-M; S2, carrying out surface carboxylation treatment on the SCPS-M by adopting an oxidizing agent, drying after the treatment is finished, and recording the obtained material as SCPS-M(AR); S3, adding the SCPS-M(AR) as an adsorbent into a magnesium nitrate solution, adsorbing magnesium ions, forming magnesium carboxylate on the surface of the porous sludge carbon, and recording the obtained material as Mg<2+> / SCPS-M(AR);and S4, calcining the Mg<2+> / SCPS-M (AR) to dehydrate the carboxyl so as to form the nano magnesium oxide cluster on the surface of the porous sludge carbon material, so that the sludge carbon-based nano-cluster magnesium oxide catalyst is obtained and is recorded as MgO / SCPS-M(AR). According to the method disclosed by the invention, the nucleation position of the catalyst is controlled, the covering uniformity of magnesium oxide on the surface of the precursor material is ensured, the formed magnesium oxide is small nano-particles, the hierarchical pore structure of the precursor material ismaintained to the greatest extent, and 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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