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Method for preparing exposed crystal face controllable rutile-type TiO2 nanorod self-assembling microspheres

A rutile-type and nano-rod technology, applied in the direction of titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of complex preparation process and achieve the effect of simple preparation method, simple process operation and easy implementation of process operation

Active Publication Date: 2015-03-11
蚌埠弘景科技有限公司
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  • Application Information

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Problems solved by technology

Chinese Science Series B: Chemistry, 2007,37(2):124-126), the preparation process is more complicated

Method used

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  • Method for preparing exposed crystal face controllable rutile-type TiO2 nanorod self-assembling microspheres
  • Method for preparing exposed crystal face controllable rutile-type TiO2 nanorod self-assembling microspheres
  • Method for preparing exposed crystal face controllable rutile-type TiO2 nanorod self-assembling microspheres

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Experimental program
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Effect test

Embodiment 1

[0029] At room temperature, 0.52 g of TBT was dissolved in 15 mL of HCl solution with a concentration of 0.02 mol / L under constant stirring; at room temperature, 0.26 g of CTAB was added to 30 mL of distilled water, and stirred continuously until a transparent solution was formed; Under conditions, the obtained transparent solution was added dropwise to the titanium-containing solution, and stirred for 2 hours to form a mixed solution; the obtained mixed solution was transferred to a 100mL polytetrafluoroethylene-lined autoclave; the autoclave was Tighten it and place it in an oven, and keep it at 180°C for 24 hours; after hydrothermal treatment, cool the autoclave to room temperature naturally; centrifuge the obtained sediment, wash it with distilled water for 3 times, and dry it in a blast drying oven at 60°C 24h to get TiO 2 powder. image 3 What a shows is the XRD pattern of the sample prepared without adding NaCl. It can be seen from the figure that the crystal form of th...

Embodiment 2

[0031]At room temperature, dissolve 0.52g of TBT in 15mL of HCl solution with a concentration of 0.02mol / L under constant stirring; at room temperature, add 0.26g of CTAB and 2.6g of NaCl into 30mL of distilled water, and keep stirring until a transparent solution; under the condition of constant stirring, the obtained transparent solution was added dropwise into the titanium-containing solution, and stirred for 2 hours to form a mixed solution; the obtained mixed solution was transferred to a 100mL polytetrafluoroethylene-lined autoclave middle; tighten the autoclave and put it in an oven, and keep it at 180°C for 24h; after the hydrothermal treatment, cool the autoclave to room temperature naturally; centrifuge the obtained sediment, wash it with distilled water for 3 times, and put it in a blast drying oven Inside, dry at 60°C for 24h to obtain TiO 2 powder. image 3 b shows the XRD pattern of the sample prepared by adding NaCl. When NaCl is added, brookite disappears and b...

Embodiment 3

[0033] At room temperature, dissolve 0.52g of TBT in 15mL of a solution with a concentration of 0.02mol / L under constant stirring; at room temperature, add 0.26g of CTAB and 3.9g of NaCl into 30mL of distilled water, and keep stirring until a transparent solution is formed ; Under the condition of constant stirring, the transparent solution obtained was added dropwise in the titanium-containing solution, and a mixed solution was formed after stirring for 2 hours; ; Tighten the autoclave and put it in an oven, and keep it at 180°C for 24 hours; after hydrothermal treatment, cool the autoclave to room temperature naturally; centrifuge the obtained sediment, wash it with distilled water for 3 times, and place it in a blast drying oven , dried at 60°C for 24h to obtain TiO 2 powder. From image 3 c It can be seen that the crystal form of the prepared sample is a pure rutile phase. Through FESEM ( figure 2 c) It can be clearly observed that the morphology of the sample is TiO ...

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Abstract

The invention discloses a method for preparing exposed crystal face controllable rutile-type TiO2 nanorod self-assembling microspheres, which comprises the following steps: stirring TBT and dissolving in a hydrochloric acid solution, mixing with CTAB and NaCl solution, insulating for 12-24 hours at 150-180 DEG C and performing hydro-thermal treatment, centrifuging and separating, and cleaning and drying to obtain TiO2 powder. According to the invention, a hydrothermal method is used, TBT is taken as a precursor, CTAB is taken as a template, and NaCl is taken as a morphology regulator, and thereby the exposed crystal face controllable rutile-type TiO2 nanorod self-assembling microspheres can be successfully prepared. Following with increase of the NaCl concentration, the prepared material crystal form is conversed to pure rutile type from a mixed phase of rutile and brookite before addition of NaCl, and the transverse plane of the TiO2 nanorod is conversed from symmetrical triangle surface to square transverse plane. The exposed (111) surface of the TiO2 nanorod is gradually reduced, and a new (001) exposed surface is generated simultaneously, and then exposure is gradually carried out, and the diameter scope of the TiO2 nanorod self-assembling microspheres is 3.5-2 mum.

Description

technical field [0001] The invention relates to a rutile TiO with controllable exposed crystal plane 2 The invention relates to a method for self-assembly of nanorods into microspheres, which belongs to the field of preparation of inorganic semiconductor materials. Background technique [0002] TiO 2 Nanorods are Nano TiO 2 A new form of existence, and other forms of nano-TiO 2 Compared with other materials, it has been widely studied because of its large specific surface area, easy separation of photogenerated electrons and holes, and high reuse rate. Currently preparing TiO 2 The methods of nanorods mainly include template method, electrochemical anodic oxidation method, hydrothermal method and so on. The hydrothermal method has the advantages of low cost, simple process, short reaction time, good crystallization, high purity, and no need for subsequent heat treatment. Therefore, the preparation by hydrothermal method is a promising method. At the same time, some res...

Claims

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Application Information

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IPC IPC(8): C01G23/053
CPCC01G23/053C01P2002/72C01P2004/04C01P2004/61
Inventor 周国伟孙彬刘蕊蕊李世超
Owner 蚌埠弘景科技有限公司
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