mn 2 moo 4 /sba-15 composite catalyst material and preparation method thereof

Abstract

A Mn2MoO4 / SBA-15 composite material is characterized in that a bimetallic oxide Mn2MoO4 is loaded on the surface and in pore channels of a molecular sieve SBA-15, and the total loading capacity of Mn2MoO4 on the SBA-15 is 20%. A preparation method of the Mn2MoO4 / SBA-15 composite material specifically comprises the following steps: dissolving (NH4)6Mo7O24.4H2O and C4H6MnO4.4H2O into concentrated hydrochloric acid, adding distilled water, adding SBA-15 while stirring, adding a surfactant polyethylene glycol 4000 (PEG) with the mass fraction of 10%-15%, heating and stirring on a magnetic stirrerwith the rotating speed of 100r / min until the mixture is pasty, drying in vacuum, grinding, and calcining at high temperature. According to the invention, the loading capacity of Mn2MoO4 on SBA-15 iseffectively controlled, the size of Mn2MoO4 in the prepared Mn2MoO4 / SBA-15 is small, the loading uniformity of Mn2MoO4 on SBA-15 is good, no agglomeration is caused, the catalytic activity is high (upto 98.8%), the sulfadiazine degradation time is short, the catalytic performance stability is good, the material can be reused, the catalytic activity is still up to 95% or above after repeated use for 10 times, the catalytic activity is not reduced, and the repeated use stability is excellent.

Description

technical field [0001] The invention relates to the technical field of advanced oxidation, in particular to Mn 2 MoO 4 / SBA-15 composite material and its preparation method. Background technique [0002] Antibiotics are widely used in the prevention and treatment of bacterial infectious diseases in humans and livestock, which will cause various bacteria to produce antibodies. At the same time, antibiotics left in medical and medical wastewater will also enter the environment as pollutants and pose a serious threat to human, animal and environmental protection. . Because antibiotics are difficult to be degraded by microorganisms, they are not easily absorbed by nature. Therefore, if reasonable and effective measures are not taken, there will be more and more residual antibiotics in the environment. According to the research of the Chinese Academy of Sciences on antibiotic pollution, in my country, more than 50,000 tons of antibiotics are discharged into the soil and water...

AI Technical Summary

Problems solved by technology

In the process of preparing the composite, the technical problems that need to be overcome are that the carrier and the catalyst are not suitable, the compatibility between the two is poor, the catalyst cannot be successfully loaded on the carrier or the loading capacity is low, and the particle size growth of the catalyst on the carrier is uncontrollable. Poor dispersion, prone to agglomeration, reduced catalytic activity after the catalyst is loaded on the carrier, easy to fall off the carrier during use, poor stability, short service life and other technical problems

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