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Porous reducing state titanium dioxide crystal material and preparation method thereof

A technology of titanium dioxide and crystal materials, applied in the growth of polycrystalline materials, chemical instruments and methods, crystal growth, etc., to achieve the effect of simple synthesis technology

Inactive Publication Date: 2017-01-11
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no report has synthesized a reduced titanium dioxide crystal material with a large specific surface area and a high degree of crystallization.

Method used

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  • Porous reducing state titanium dioxide crystal material and preparation method thereof
  • Porous reducing state titanium dioxide crystal material and preparation method thereof
  • Porous reducing state titanium dioxide crystal material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A porous reduced titanium dioxide crystal material, the preparation method of which is:

[0039] 3g of titanium glycolate (Ti(OCH 2 CH 2 O) 2 ) into 100 mL of deionized water. Under the conditions of constant stirring and external room temperature circulating cooling water for cooling, a 125W tubular high-pressure mercury lamp was used as a light source for ultraviolet light treatment for 4 hours to obtain a dark blue solid-liquid mixture (the solid is amorphous porous titanium dioxide that stores photoelectrons). The solid-liquid mixture was transferred to a beaker, sealed with a plastic wrap to form an airtight condition, and kept at room temperature in the dark for 5 days. The obtained solid was centrifuged, washed with deionized water for 3 to 5 times, and then dispersed into 100 mL of 50 vol% methanol aqueous solution prepared from anhydrous methanol and deionized water. A 125W tubular high-pressure mercury lamp is used as a light source for 0.5h of ultraviolet...

Embodiment 2

[0047] A porous reduced titanium dioxide crystal material, the preparation method of which is:

[0048] 3g of titanium glycolate (Ti(OCH 2 CH 2 O) 2 ) into 100 mL of deionized water. Under the conditions of constant stirring and external room temperature circulating cooling water for cooling, a 125W tubular high-pressure mercury lamp was used as a light source for ultraviolet light treatment for 4 hours to obtain a dark blue solid-liquid mixture (the solid is amorphous porous titanium dioxide that stores photoelectrons). The solid-liquid mixture was transferred to a beaker, sealed with a plastic wrap to form an airtight condition, and kept at room temperature in the dark for 2 days. The obtained solid was centrifuged, washed with deionized water for 3 to 5 times, and then dispersed into 100 mL of 50 vol% methanol aqueous solution prepared from anhydrous methanol and deionized water. Using a 125W tubular high-pressure mercury lamp as the light source for 0.5h of ultraviolet...

Embodiment 3

[0050] 3g of titanium glycolate (Ti(OCH 2 CH 2 O) 2 ) into 100 mL of deionized water. Under the conditions of constant stirring and external room temperature circulating cooling water for cooling, a 125W tubular high-pressure mercury lamp was used as a light source for ultraviolet light treatment for 4 hours to obtain a dark blue solid-liquid mixture (the solid is amorphous porous titanium dioxide that stores photoelectrons). The solid-liquid mixture was transferred to a beaker, sealed with a plastic wrap to form an airtight condition, and kept at room temperature in the dark for 40 days. The obtained solid was centrifuged, washed with deionized water for 3 to 5 times, and then dispersed into 100 mL of 50 vol% methanol aqueous solution prepared from anhydrous methanol and deionized water. After 0.5h of ultraviolet light treatment, the porous reduced titanium dioxide crystal material is obtained, which has an anatase crystal phase, a porous structure with a pore size of 1-4n...

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Abstract

The invention provides a porous reducing state titanium dioxide crystal material and a preparation method thereof. The porous reducing state titanium dioxide crystal material has the anatase crystal phase; the specific surface area is 463 to 736 m<2> / g; the pore diameter is 1 to 4nm; the doping quantity of the surface Ti<3+> irons is 5.1 percent to 9.4 percent; the light absorption interval covers ultraviolet light and visible light intervals. Through an optoelectronic storage technology under the room temperature condition, the porous reducing state titanium dioxide crystal material with the large specific surface area is synthesized for the first time. The preparation method is different from a conventional synthesis method; a mild room temperature processing process is used for replacing a conventional high-energy processing process to realize the material crystallization and to overcome building defects. The porous reducing state titanium dioxide crystal material and the preparation method have the advantages that the synthesis technology is simple and green, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a porous reduced titanium dioxide crystal material and a preparation method thereof, in particular to Ti with large specific surface area, porous structure and anatase crystal phase 3+ A preparation method of ion surface self-doped titanium dioxide crystal material. Background technique [0002] Titanium dioxide material has the characteristics of low cost, high stability and excellent physical and chemical properties, and has been considered as one of the most important functional semiconductor materials. At present, titanium dioxide materials have been widely studied and applied to photocatalytic materials, solar cell electrode materials, photoinduced superhydrophilic materials, electrochromic materials, and gas-sensitive materials (Chem. Rev., 2007, 107, 2891; Chem. . Rev., 2006, 106, 4428). Reduced titanium dioxide refers to Ti 3+ A type of defect-type titanium dioxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/16C30B28/04
CPCC30B29/16C30B28/04
Inventor 苏娟
Owner SHANGHAI TECH UNIV
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