A preparation method for controlling the crystal form and morphology of titanium-based nanomaterial products

A technology of nanomaterials and products, which is applied in the field of preparation of inorganic nanomaterials to achieve the effects of strong repeatability, simple and easy preparation methods, and simple processes and procedures

Inactive Publication Date: 2016-08-17
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the same experimental system, by adjusting one experimental condition, a method for artificially and controllably obtaining multiple (five or more) different crystal forms and different shapes of titanium-based nanomaterials has not been reported yet.

Method used

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  • A preparation method for controlling the crystal form and morphology of titanium-based nanomaterial products
  • A preparation method for controlling the crystal form and morphology of titanium-based nanomaterial products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 9 ml of n-tetrabutyl titanate into 65 ml of hydrochloric acid with a concentration of 3 mol / L, and stir evenly. Then the suspension was put into a Teflon-lined stainless steel autoclave and reacted at 453 K for 24 h. After the reaction, the precipitated product is washed with deionized water until the pH of the washing solution is neutral, and then dried to obtain the target titanium-based nanomaterial.

[0022] X-ray powder diffraction characterization results show that the prepared titanium-based nanomaterials are in the rutile crystal form; scanning electron microscope characterization results show that the prepared titanium-based nanomaterials are in the shape of nanorods, and the diameter of the nanorods is about 40 nanometers. Between 300 and 500 nanometers.

Embodiment 2

[0024] Add 15 ml of isopropyl titanate to 100 ml of hydrochloric acid with a concentration of 0.01 mol / L, and stir evenly. Then the suspension was put into a Teflon-lined stainless steel autoclave and reacted at 463 K for 36 h. After the reaction, the precipitated product is washed with deionized water until the pH of the washing solution is neutral, and then dried to obtain the target titanium-based nanomaterial.

[0025] X-ray powder diffraction characterization results show that the prepared titanium-based nanomaterials are in the anatase crystal form; scanning electron microscope characterization results show that the prepared titanium-based nanomaterials are monodisperse nanocrystals with a grain size of about 10 Nano or so.

Embodiment 3

[0027] Add 8 ml of tetraethyl titanate into 60 ml of sodium hydroxide solution with a concentration of 0.1 mol / L, and stir evenly. Then the suspension was put into a Teflon-lined stainless steel autoclave and reacted at 453 K for 48 h. After the reaction, the precipitated product is washed with deionized water until the pH of the washing solution is neutral, and then dried to obtain the target titanium-based nanomaterial.

[0028] X-ray powder diffraction characterization results show that the prepared titanium-based nanomaterials are in brookite crystal form; scanning electron microscope characterization results show that the prepared titanium-based nanomaterials are in the shape of nanoflowers. The nanoflower is composed of nanorods, the two ends of each nanoflower are petals with a radial multi-level structure, and the middle part of the nanoflower is a nanorod aggregate. The length (petal extension direction) of each nanoflower cluster is about 1 micron, but the diameter ...

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Abstract

The invention relates to a preparation method for controlling product crystal form and morphology of a titanium-based nanometer material. The method comprises the following steps: adding a liquid phase titanium source into a solution of hydrochloric acid or sodium hydroxide with a certain concentration, and rapidly stirring, so that the materials are uniformly mixed; adding the suspension into a stainless steel high-pressure autoclave with a polytetrafluoroethylene lining for carrying out a hydrothermal reaction; washing and drying the precipitation product after the hydrothermal reaction is ended, thereby obtaining a titanium dioxide or titanate nanometer material product in the high-pressure autoclave. The aim of controlling the product crystal form and morphology can be achieved by controlling the concentration of the solution of hydrochloric acid or sodium hydroxide. If the product is titanate, the product crystal form and morphology can be further controlled by virtue of an acid washing and roasting treatment method. The preparation method is simple and convenient in process and flow, the parameter adjustable range is wide, the repeatability is high, the cost is low, and various titanium dioxide or titanate products of different crystal forms can be prepared.

Description

technical field [0001] The invention relates to a preparation method for controlling the crystal form and appearance of nanomaterial products, in particular to a preparation method for controlling the crystal form and appearance of titanium-based nanomaterial products, and belongs to the technical field of inorganic nanomaterial preparation. Background technique [0002] In the field of nanomaterials research, the preparation and performance research of titanium-based nanomaterials (titanium dioxide, titanate, etc.) is of great significance. Titanium dioxide nanomaterials have the advantages of excellent photocatalytic performance, high chemical stability, non-toxicity, and low cost. They can be used in many fields such as air purification, sewage treatment, antibacterial, anti-fog self-cleaning, and solar cells. Due to its unique layered structure, titanate nanomaterials have ion exchangeability and can be used in lithium-ion batteries, catalytic oxidation, ion adsorption, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C01G23/00B82Y30/00
Inventor 赵斌陈超林琳曾琦琪何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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