A new type of titanium dioxide particulate material, its preparation method, and its application in the field of environmental protection

Abstract

The invention provides a titanium dioxide particle material. The titanium dioxide particle material is a porous titanium dioxide particle material; the titanium dioxide particle material has a crumpled surface. The novel titanium dioxide particle material has the crumpled surface, and the macroscopic shape is controllable, the grain diameter is uniform and adjustable, the specific area is high, and the aperture is adjustable; the crystal grain size and the crystal phase are controllable, the surface has hydroxide radical and Ti3+ chemical valence; the material has strong metal ion adsorption capacity and good static adsorption capacity; a part of absorbed high valence metal ions can be reduced to low valence ions with small toxicity; the big particle grain diameter can make the metal ionsuse as a filler of an absorbing bed for dynamic fluidic absorption, thus the heavy metal ions can be rapidly removed; the particle material has consistent absorbing capacity and excellent absorbing-desorbing circular stability as the static absorption, various heavy metal ions can be efficiently and rapidly removed; the particle material is easy to reoccur, and free from obvious performance drop after circularly use for many times.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide material preparation, and relates to a titanium dioxide particle material and its preparation method and application, in particular to a novel titanium dioxide particle material, its preparation method and its application in the field of environmental protection. Background technique [0002] Titanium dioxide (TiO 2 ) is a white amphoteric oxide, non-toxic, opaque, with high whiteness and brightness, and is widely used in the coating industry. Nano-TiO 2 It has excellent optical properties, high chemical and thermal stability, superhydrophilicity and non-migratory properties, and can be in contact with food. It is widely used in anti-ultraviolet materials, photocatalytic catalysts, self-cleaning glass, sunscreen, etc. In addition, TiO 2 Materials also play an important role in environmental governance, for example, nano-TiO 2 It can directly use sunlight or ultraviolet light to decomp...

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Problems solved by technology

However, the particle size of the obtained particles is small and the particle size distribution is wide, which is not conducive to direct use in adsorption and catalysis, and often requires molding to prepare particles with larger particle sizes.

[0004] And most of the existing literature on TiO 2 The research focuses on the preparation of nanopowders, which have a wide particle size distribution. However, when used as an adsorbent or a heterogeneous catalyst, the particle size and uniformity are crucial for practical applications. Nanoparticles are difficult to achieve solid-liquid separation, and it is difficult to directly For flow adsorption or catalysis; particles with small particle size and poor uniformity will cause excessive pressure drop, etc.

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