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A kind of rutile titanium dioxide-metal oxide composite and its preparation method and application

A technology of rutile titanium dioxide and titanium dioxide, applied in the direction of metal/metal oxide/metal hydroxide catalyst, nickel oxide/nickel hydroxide, catalyst activation/preparation, etc., can solve the problem of poor charge separation and surface reaction efficiency, large size , poor carrier separation performance, etc., to achieve the effect of improving charge separation and surface reaction efficiency, small size, and improving utilization value

Active Publication Date: 2021-11-12
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this scheme provides mesoporous single-crystal titanium dioxide, its large size makes it poor in carrier separation, charge separation and surface reaction efficiency.

Method used

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  • A kind of rutile titanium dioxide-metal oxide composite and its preparation method and application
  • A kind of rutile titanium dioxide-metal oxide composite and its preparation method and application
  • A kind of rutile titanium dioxide-metal oxide composite and its preparation method and application

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Embodiment 1

[0099] This embodiment provides a method for preparing rutile titanium dioxide-metal oxide composite, the specific method is:

[0100] (1) Preparation of composite particles of silica-coated ruthenium dioxide:

[0101] (A) 20mg of ruthenium trichloride was dissolved in 1.2mL deionized water to obtain an aqueous solution of ruthenium trichloride;

[0102] (B) Dissolve 10g of polyoxyethylene ether in 45mL of n-hexane, and heat at 50°C until clear and transparent to obtain a n-hexane solution of polyoxyethylene ether;

[0103] (C) Add 0.2 mL of ruthenium trichloride aqueous solution to 50 mL of polyoxyethylene ether in n-hexane, and stir at 50° C. for 1 h;

[0104] (D) Add 2 mL of ammonia water to the mixed solution obtained in step (C), and continue stirring for 1 h;

[0105] (E) Add 6 mL of analytically pure tetraethyl silicate to the mixed solution obtained in step (D), and continue stirring for 2 h;

[0106] (F) Step (E) is separated after the stirring is completed, and th...

Embodiment 2

[0120] This embodiment provides a method for preparing rutile titanium dioxide-metal oxide composite, the specific method is:

[0121] (1) Preparation of composite particles of silica-coated cobalt tetroxide:

[0122] (A) 40mg cobalt nitrate was dissolved in 1.2mL deionized water to obtain cobalt nitrate aqueous solution;

[0123] (B) Dissolve 10g of polyoxyethylene ether in 50mL of n-hexane, and heat at 50°C until clear and transparent to obtain a n-hexane solution of polyoxyethylene ether;

[0124] (C) Add 0.2mL cobalt nitrate aqueous solution to 50mL polyoxyethylene ether n-hexane solution, and stir at 50°C for 1.5h;

[0125] (D) Add 2 mL of ammonia water to the mixed solution obtained in step (C), and continue stirring for 1.5 h;

[0126] (E) Add 6 mL of analytically pure tetraethyl silicate to the mixed solution obtained in step (D), and continue stirring for 2 h;

[0127] (F) Step (E) is separated after the stirring is completed, and then the separated product is drie...

Embodiment 3

[0137] This embodiment provides a method for preparing rutile titanium dioxide-metal oxide composite, the specific method is:

[0138] (1) Preparation of composite particles of silica-coated nickel oxide:

[0139] (A) 30mg of nickel chloride is dissolved in 1.2mL of deionized water to obtain an aqueous solution of nickel chloride;

[0140] (B) Dissolve 10g of polyoxyethylene ether in 50mL of n-hexane, and heat at 50°C until clear and transparent to obtain a n-hexane solution of polyoxyethylene ether;

[0141] (C) Add 0.2mL nickel chloride aqueous solution to 50mL polyoxyethylene ether n-hexane solution, and stir at 50°C for 1.5h;

[0142] (D) Add 2 mL of ammonia water to the mixed solution obtained in step (C), and continue stirring for 1.5 h;

[0143] (E) Add 6 mL of analytically pure tetraethyl silicate to the mixed solution obtained in step (D), and continue stirring for 2 h;

[0144] (F) Step (E) is separated after the stirring is completed, and then the separated produ...

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Abstract

The invention provides a rutile titanium dioxide-metal oxide composite, its preparation method and application. In the composite, the metal oxide particles are dispersed and distributed on the mesoporous single crystal rutile titanium dioxide to form a rod-shaped composite. The preparation method comprises: 1) preparing silica-coated metal oxide composite particles; 2) growing titanium dioxide seed crystals in silica-coated metal oxide composite particles; 3) adopting silica-titania seed crystal composites Growing rutile titanium dioxide; 4) removing silicon dioxide in the silica-rutile titanium dioxide composite. The composite has small size and large specific surface area, metal oxides are highly dispersedly distributed on rutile mesoporous single crystal titanium dioxide, has strong carrier separation ability and good catalytic performance, and can be used in fields such as solar energy conversion. The preparation method fully utilizes the silicon dioxide template, has short process and low cost.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and relates to a rutile titanium dioxide-metal oxide composite, a preparation method and application thereof. Background technique [0002] Mesoporous single crystal semiconductor materials have the advantages of both porous materials and single crystal structures: good crystallinity and stability, larger specific surface area, higher light absorption efficiency and excellent carrier transport efficiency. These characteristics make it uniquely advantageous in the application of photocatalytic water splitting. However, the size and pore diameter of the currently obtained mesoporous single crystal semiconductors are relatively large, so that they cannot give full play to their own advantages in terms of carrier separation. Therefore, optimizing its morphology to promote its photogenerated charge separation efficiency is an effective way to solve this problem. On the basis of optimizing the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J23/72B01J23/745B01J23/75B01J23/755C01G51/04C01G53/04C01G55/00A01N59/16A01N59/20A01P1/00A01P3/00
CPCA01N59/16A01N59/20C01G51/04C01G53/04C01G55/004B01J23/462B01J23/72B01J23/745B01J23/75B01J23/755B01J37/0018B01J35/39B01J35/50B01J35/613B01J35/647
Inventor 朴玲钰曹爽吴志娇伏兵
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA