Elastic TiO2 ceramic fiber sponge for environmental catalysis and preparation method thereof

Abstract

The invention relates to an elastic TiO2 ceramic fiber sponge for environmental catalysis and a preparation method thereof. The method comprises the following steps: first preparing viscous dispersionliquid through water-soluble polymer, water and inorganic sol, adding TiO2 ceramic fiber film, performing intermittent beating, adding polyelectrolyte, so as to obtain TiO2 ceramic fiber dispersion liquid, and then performing curing forming, so as to obtain the elastic TiO2 ceramic fiber sponge. The method effectively solves the problems of particle detachment and structure collapse of a particletype TiO2 ceramic material or a TiO2 ceramic material with a bonding structure, for environmental catalysis under the effect of high-speed flow field, meanwhile obviously improves the quantity of active sites of a catalytic material during catalytic reaction, and ensures that the finally produced sponge has the advantages of high catalytic efficiency, high stability and high elasticity, and has good practical value and popularization value.

Description

technical field [0001] The invention belongs to the field of ceramic porous materials, in particular to a kind of elastic TiO for environmental catalysis 2 Ceramic fiber sponge and its preparation method. Background technique [0002] As a porous material, ceramic sponge has the advantages of high porosity, large specific surface area, low density and strong doping adsorption capacity. At the same time, TiO 2 As a commonly used catalyst and catalyst carrier material, it is constructed into a sponge-like material, which has broad application prospects in the fields of textile printing and dyeing wastewater treatment, volatile organic pollutants treatment, and flue gas denitrification. [0003] Patent CN105217676A discloses a preparation method of titanium oxide sponge with nanosheet and nanoporous structure, and patent CN106669676A discloses a silver-loaded nano-TiO 2 The production equipment and production method of the sponge, in the literature Materials and Engineering 4...

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Problems solved by technology

[0005] In the literature Journal of Industrial and Engineering Chemistry 33 (2016) 91-98, TiO 2 After the nanofibers and alumina short fibers were dispersed, the composite TiO2 was prepared by suction filtration. 2 Ceramic fiber sponge, but it is difficult to control the suction pressure during the suction filtration process, resulting in deformation of the internal fiber framework, thus making the final formation of TiO 2 The two-dimensional structure of ceramic fiber sponge and the reduction of porosity; in the literature Science Advances 3 (2017) e1603170, TiO was prepared by solution spraying method combined with high temperature calcination 2 Nanofiber sponge, but there are no adhesion points between the fibers. In practical applications, it is easy to cause the internal structure to collapse and have no shape memory performance, which affects the stability and continuity of the catalyst during the catalytic reaction, thereby further reducing the catalytic efficiency of the catalytic reaction.