Nano linear calcium titanate and synthesis method thereof

A synthesis method and technology of calcium titanate, applied in the field of nanowire calcium titanate and the synthesis of such nanowire calcium titanate, can solve the problems of restricting large-scale production, template destruction, inability to reuse, etc., to meet the needs of large-scale production. Large-scale industrial production, excellent ecological biocompatibility, and the effect of avoiding high-temperature solid-phase reactions

Inactive Publication Date: 2012-07-18
CENT SOUTH UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

The template method is one of the most effective methods to obtain ordered nanostructures, but this method is not only complicated in the template synthesis process, but also has a large diameter, thick tube wall, and small specific surface area, and the pore size of the tube is affected by the template pore size and shape. Due to the limitation of appearance, in order to make the product can be better adsorbed on the template, the cleanliness of the template surface is also extremely high, and the template will be destroyed after each experiment and cannot be reused, resulting in the high cost of material synthesis and difficult to carry out. large-scale industrial production
The anodic oxidation method is to anodize pure titanium sheets in an electrolytic solution to obtain one-dimensional TiO with different shapes and crystallinity. 2 For nanomaterials, the voltage and electrolytic solution affect the shape and size of nanotubes throughout the process, while the electrolytic solution has many influencing factors and is not easy to prepare, thus limiting its large-scale production

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  • Nano linear calcium titanate and synthesis method thereof
  • Nano linear calcium titanate and synthesis method thereof
  • Nano linear calcium titanate and synthesis method thereof

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Embodiment 1

[0029] 1) Preparation of strong base solution: accurately weigh 100 grams of analytically pure sodium hydroxide, dissolve it in 500 mL of deionized water to obtain strong base solution A, and the concentration of substances in strong base solution A is 5 mol / L;

[0030] 2) Hydrothermal reaction: Accurately weigh 0.8 g of analytically pure titanium dioxide, add 30 mL of strong alkali solution A and stir evenly, transfer to a stainless steel reaction kettle, and magnetically stir the hydrothermal reaction at 150°C for 15 hours , after cooling, wash until nearly neutral to obtain white precipitate B;

[0031] 3) Preparation of soluble calcium salt solution: accurately weigh 25 grams of analytically pure anhydrous calcium chloride, dissolve in 500 mL of deionized water to obtain soluble calcium salt solution C, and the mass concentration of soluble calcium salt solution C is 50 g / L;

[0032] 4) Ion exchange reaction: Take 35 mL of soluble calcium salt solution C, add it to the abo...

Embodiment 2

[0035] 1) Preparation of strong alkali solution: accurately weigh 150 grams of analytically pure sodium hydroxide, dissolve it in 250 mL of deionized water to obtain strong alkali solution A, and the concentration of substances in strong alkali solution A is 15 mol / L;

[0036] 2) Hydrothermal reaction: Accurately weigh 0.8 g of analytically pure titanium dioxide, add 30 mL of strong alkali solution A and stir evenly, then transfer to a stainless steel reaction kettle, and magnetically stir the hydrothermal reaction at 250°C for 15 hours , after cooling, wash until nearly neutral to obtain white precipitate B;

[0037] 3) Preparation of soluble calcium salt solution: accurately weigh 5 grams of analytically pure anhydrous calcium chloride, dissolve in 500 mL of deionized water to obtain soluble calcium salt solution C, and the mass concentration of soluble calcium salt solution C is 10 g / L;

[0038] 4) Ion exchange reaction: Measure 120 mL of soluble calcium salt solution C, ad...

Embodiment 3

[0041] 1) Preparation of strong base solution: accurately weigh 200 grams of analytically pure sodium hydroxide, dissolve it in 500 mL of deionized water to obtain strong base solution A, and the concentration of substances in strong base solution A is 10 mol / L;

[0042] 2) Hydrothermal reaction: Accurately weigh 0.8 g of analytically pure titanium dioxide, add 30 mL of strong alkali solution A and stir evenly, then transfer to a stainless steel reaction kettle, and magnetically stir the hydrothermal reaction at 180°C for 24 hours , after cooling, wash until nearly neutral to obtain white precipitate B;

[0043]3) Preparation of soluble calcium salt solution: accurately weigh 25 grams of analytically pure anhydrous calcium chloride, dissolve in 500 mL of deionized water to obtain soluble calcium salt solution C, and the mass concentration of soluble calcium salt solution C is 50 g / L;

[0044] 4) Ion exchange reaction: Take 35mL of soluble calcium salt solution C, add it to the...

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Abstract

The invention discloses nano linear calcium titanate and a synthesis method thereof. The synthesis method for the nano linear calcium titanate comprises the following steps of: 1) dispersing titanium dioxide in a strong alkali solution, and performing a hydro-thermal reaction with stirring to obtain a white deposit; 2) washing the white deposit by using water until the white deposit is neutral or weakly alkaline, dispersing the white deposit in a soluble calcium salt solution, controlling the temperature and the pH value of the system, and performing ion exchange reaction to obtain a calcium titanate deposit; and 3) performing centrifugal washing on the calcium titanate deposit until the calcium titanate deposit is neutral, and drying and baking the calcium titanate deposit to obtain the nano linear calcium titanate. The synthesis method for the nano linear calcium titanate is mild in reaction condition, simple in operation, rich in raw material source and low in cost, so that the synthesis method is suitable for mass production; and the synthesized nano linear calcium titanate is a solid alkali with a large specific area, has high ecological biocompatibility, and is expected to be applied in the fields of heavy metal ion contaminated waste water purification, ester exchange reaction catalysis, sclerous tissue repair and replacement and the like.

Description

technical field [0001] The invention relates to a calcium titanate and a synthesis method thereof, in particular to a nanowire calcium titanate and a method for synthesizing the nanowire calcium titanate. Background technique [0002] Since the discovery of carbon nanotubes, one-dimensional nanomaterials have been characterized by their unique structures (tubular shape, small diameter, large specific surface area) and broad application prospects (photoelectricity, sensing, catalysis, single-electron transistors, molecular straws, composite materials) It has aroused great research interest of scientists. The synthesis, characterization and application of one-dimensional nanomaterials have become an important research direction in the field of nanomaterials, and a representative class of nanomaterials is one-dimensional titanate nanomaterials, which were published in 1996 by Hoyer and Patrick[ Langmuir, 1996, 12: 1411-1413] used the porous anodized alumina template method to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B82Y40/00
Inventor 吴松李明波何榕真涂斌
Owner CENT SOUTH UNIV
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