Activated carbon based nano TiO2 composite MnO2 catalytic material and preparation method therefor

Abstract

The invention discloses an activated carbon based nano TiO2 composite MnO2 catalytic material. The material comprises honeycomb rectangular blocks, honeycomb circular blocks, honeycomb hexagonal blocks, honeycomb holes, triangular strips, semi-circular strips, Ti / Mn coatings and honeycomb fiber meshes. A preparation method for the catalytic material comprises: substrate activation; nano titanium preparation; titanium spraying; manganese spraying; chemical deposition ; and post-treatment. By taking honeycomb activated carbon as a carrier, manganese dioxide and nano titanium dioxide as a compound catalyst is loaded on the honeycomb activated carbon to prepare a catalytic block or a fiber mesh for air purification and treatment; manganese dioxide is attached to the surfaces of nano TiO2 particles by virtue of a chemical deposition method to form a composite material. The preparation process disclosed by the invention is short in flow and easy to control. The obtained composite catalytic material has high catalytic activity, can be used for treating total volatile organic compounds (TVOC) in low concentration indoor air at normal temperature and can be used for treating high concentration industrial organic waste gas in a temperature range of 70-120 DEG C.

Description

technical field [0001] The invention relates to the technical equipment field of activated carbon-based air catalytic purification materials, in particular to an activated carbon-based nano-TiO 2 Composite MnO 2 Catalytic materials and methods for their preparation. Background technique [0002] The invention relates to a catalytic material based on nano-titanium dioxide, and manganese dioxide is attached to nano-TiO by chemical deposition. 2 The composite catalytic material composed of particle surface and its preparation method are especially suitable for the preparation of catalytic materials for indoor and industrial waste gas treatment. [0003] Studies have shown that the pollution level of most organic pollutants in the indoor environment is several times that of the outdoors, sometimes even as high as a hundred times; and modern people usually spend 80%-90% of the time indoors on average. The exposure level of indoor pollution concentration is relatively high, so ...

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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides an activated carbon-based nano-TiO 2 Composite MnO 2 Catalytic materials and their preparation methods, aiming at the deficiencies in the prior art and considering the practical application of exhaust gas treatment, use honeycomb activated carbon block or carbon fiber mesh as the base material, and nano-TiO 2 Particles and MnO 2 Prepare the composite catalytic material by loading, improve its catalytic performance, and pure nano-TiO 2 Compared with the particles, the ultrafine titanium dioxide is used as the base catalytic material, and the manganese dioxide is attached to the nano-TiO2 by chemical deposition. 2 The composite catalytic material composed of the particle surface has high catalytic activity, short preparation process and easy control. The composite catalytic material has the advantages of strong oxidation, high degradation efficiency, non-toxicity and no secondary pollution. It is widely used in the fields of environmental pollution control and new energy applications. Promising prospects; common nano-TiO solved 2 Photocatalysts have low photon utilization rate, easy recombination of electron-hole pairs, small particle size of nanoparticles, easy agglomeration, and small specific surface area in the reaction process, and have good adsorption performance for organic pollutant molecules.

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