Preparation method of nano titanic acid tablets

Abstract

The invention relates to a preparation method of nano titanic acid tablets. In the preparation method, sodium hydroxide and potassium hydride are used as alkali melting agents, titanium dioxide is used as a titanic acid raw material, de-ionized water is used as a cleaning agent, a washing agent and an extracting agent, and absolute ethyl alcohol is used as a washing agent and a dry support to synthesize nano titanic acid tablet monocrystal under atmospheric pressure of 0.1MPa at low temperature of 200 DEG C. A dispersing agent is not used in synthesis, the used raw materials are fewer, the process flow is short and the product is in a monocrystal structure. The titanic acid tablets are 2-4nm thick and 120-150nm long and have stable chemical and physical properties, and the purity is as high as 99.5%. The preparation method has the characteristics of low synthesis temperature, accurate combination, low cost and the like, is simple to operate and is an ideal method for quickly preparing the nano titanic acid tablets.

Description

technical field [0001] The invention relates to a preparation method of nanoscale titanic acid sheet, which belongs to the technical field of the preparation method and application of inorganic chemical substance titanium oxide. Background technique [0002] Layered compounds are excellent adsorbents for harmful ions and gases, and can be used as highly active composite catalysts and catalyst supports for inorganic substances, which can split water; The chemical reaction provides a nanoscale reaction space, and at the same time, the stripped nanoscale monolithic layer can be used as the basic unit of other nanostructures. [0003] The structure of inorganic layered compounds is that two-dimensional laminates are arranged longitudinally and orderly to form a three-dimensional crystal structure. Most of the atoms in the laminates are covalently bonded, and the interlayers are van der Waals forces or weak chemical ionic bonds. The distance between layers is generally several na...

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Problems solved by technology

[0004] Titanate nanocrystal is a wide-bandgap semiconductor widely used in photocatalysts, gas sensors, and solar cells; it can be used for sewage treatment by utilizing its ion exchange property; titanate is often prepared by high-temperature solid-state reaction method, and TiO 2 Powder and N a CO 3 、K 2 CO 3 Mixed grinding, roasting at 800°C-1300°C for 40h, the resulting product is 3um fibrous, the reaction temperature is high, and the cycle is long; the soft chemical method mainly involves the process of precursor hydrolysis and polycondensation, and the hydrolysis rate of multi-component composite oxides is slow. Matching, easy to cause segregation of a certain element; hydrothermal reaction method can also prepare long-fiber layered titanate, through TiO 2 With NaOH at 400°C, 17MP a Under pressure, layered titanate of Φ1×100um can be produced, but the hydrothermal reaction conditions are harsh and demanding. The reaction time of the stearic acid method and the citric acid method is short, but the reaction temperature is high, at 500°C-700°C , which is not conducive to industrial production, and the particle size of the titanic acid product is large, which is not easy to match

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