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Method for preparing nano-scale titanium dioxide rod

A titanium dioxide, high-level technology, applied in the field of preparing nano-level titanium dioxide rods, can solve the problems of high cost, long process flow, and high requirements for crushing equipment, and achieve the effects of low pollution, short process flow, and simple equipment

Inactive Publication Date: 2018-12-21
RES INST OF ZHEJIANG UNIV TAIZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical method is also called the mechanical pulverization method, which has high requirements on the pulverization equipment; the chemical method can be divided into gas phase method (CVD), liquid phase method and solid phase method, which have high cost and long process

Method used

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  • Method for preparing nano-scale titanium dioxide rod
  • Method for preparing nano-scale titanium dioxide rod
  • Method for preparing nano-scale titanium dioxide rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare a uniform mixed powder of titanium source: sodium chloride: disodium hydrogen phosphate with a mass ratio of 1:4:1, place the powder at 800 °C for 8 h, and after the product is cooled to room temperature, immerse it in deionized water After the product was soaked for 24 h, the sintered product was transferred to a centrifuge tube, heated in a stirring water bath for 1 h, and then centrifuged at 500 g for 30 min. After removing the supernatant, an appropriate amount of deionized water was added. Stir and heat in a water bath for 30 min, then centrifuge at 1000 g for 30 min, and repeat the process of centrifuging at 1000 g in a water bath for 4 times, and collect the product after drying. Such as Figure 1-2 As shown, using SEM to observe the product, it is a long thin rod structure with an average diameter of 100 nm. Such as image 3 As shown, XRD measurement shows that the product is rutile crystal form titanium dioxide.

Embodiment 2

[0028] Prepare a uniform mixed powder of titanium source: sodium chloride: disodium hydrogen phosphate with a mass ratio of 1:4:1, place the powder at 700 °C for 8 h, and after the product is cooled to room temperature, immerse it in deionized water After the product was soaked for 24 h, the sintered product was transferred to a centrifuge tube, heated in a stirring water bath for 0.5 h, and then centrifuged at 500 g for 30 min. After removing the supernatant, an appropriate amount of deionized water was added. Stir and heat in a water bath for 30 min, then centrifuge at 1000 g for 30 min, and repeat the process of centrifuging at 1000 g in a water bath for 4 times, and collect the product after drying. Using SEM to observe the product, it is a short rod-like structure with an average diameter of 50 nm. XRD measurement showed that the product was rutile crystal titanium dioxide.

Embodiment 3

[0030] Prepare a uniform mixed powder of titanium source: sodium chloride: disodium hydrogen phosphate with a mass ratio of 1:4:1, place the powder at 900 °C for 8 h, and after the product is cooled to room temperature, immerse it in deionized water After the product was soaked for 24 hours, the sintered product was transferred to a centrifuge tube, heated in a stirring water bath for 2 hours, and then centrifuged at 500 g for 30 minutes. After removing the supernatant, an appropriate amount of deionized water was added. Stir and heat in a water bath for 30 min, then centrifuge at 1000 g for 30 min, and repeat the process of centrifuging at 1000 g in a water bath for 4 times, and collect the product after drying. Using SEM to observe the product, it is a short rod and granular structure with an average diameter of 400 nm. XRD measurement showed that the product was rutile crystal titanium dioxide.

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Abstract

The invention discloses a method for preparing a nano-scale titanium dioxide rod. The method for preparing the nano-scale titanium dioxide rod comprises the following steps: (1) preparing titanium source-sodium chloride-disodium hydrogen phosphate mixed powder according to a certain mass ratio, and placing the titanium source-sodium chloride-disodium hydrogen phosphate mixed powder in a mortar tobe ground and uniformly dispersed; (2) calcining the titanium source-sodium chloride-disodium hydrogen phosphate mixed powder at 700-900 DEG C for 6-24 h; (3) after using deionized water to carry outplastic dipping on the calcined titanium source-sodium chloride-disodium hydrogen phosphate mixed powder, transferring sintered substances; and after water bath, centrifugally removing salt; and (4) after drying the sintered substances, collecting a product. The method for preparing the nano-scale titanium dioxide rod, disclosed by the invention, has the advantages that the cost is low, the experimental operation is simple, the product preparation period is short, the repeatability is good, rod-shaped titanium dioxide with uniform radius can be prepared, the radius is dispersed within a rangeof 50-400 nm, and the average length is 0.5-50 microns.

Description

technical field [0001] The invention relates to a method for preparing nanoscale titanium dioxide rods. Background technique [0002] As a semiconductor material, titanium dioxide has the advantages of stable chemical properties, high catalytic activity, good thermal stability, low cost, non-toxic and safe. When its size reaches the nanometer level, due to its special surface effect and size effect, it is more Excellent physical and chemical properties. Therefore, titanium dioxide is considered to have great potential application value in energy photocatalysis, ultraviolet absorber, functional ceramics, etc. [0003] There are many methods for preparing nano-titanium dioxide, which can basically be classified into physical and chemical methods. The physical method is also called the mechanical pulverization method, which has high requirements on the pulverization equipment; the chemical method can be divided into gas phase method (CVD), liquid phase method and solid phase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C01G23/08B82Y40/00
CPCB82Y40/00C01G23/047C01G23/08C01P2002/72C01P2004/03C01P2004/16C01P2004/61C01P2004/62C01P2004/64
Inventor 徐鑫磊刘振中应佳蕾谭文军马春新
Owner RES INST OF ZHEJIANG UNIV TAIZHOU