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A kind of ultra-thin mixed crystal titanium dioxide nanosheet and its preparation method and application

A technology of titanium dioxide and nanosheets, which is applied in the field of ultra-thin mixed crystal titanium dioxide nanosheets and its preparation, can solve the problems of scarcity of preparation and performance research, lack of research on morphology and performance, etc., and is conducive to large-scale promotion and use. Efficient reaction stability, high stability effect

Active Publication Date: 2019-01-22
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, considering the lack of research on the morphology and properties of mixed crystal titanium dioxide, especially the preparation and performance research of two-dimensional mixed crystal titanium dioxide is scarce, let alone its development and utilization.

Method used

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  • A kind of ultra-thin mixed crystal titanium dioxide nanosheet and its preparation method and application
  • A kind of ultra-thin mixed crystal titanium dioxide nanosheet and its preparation method and application
  • A kind of ultra-thin mixed crystal titanium dioxide nanosheet and its preparation method and application

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Embodiment 1

[0025] Ultra-thin H 1.07 Ti 1.73 o 4 ·H 2 Preparation of O nanosheet precursors

[0026] Will K 2 CO 3 , Li 2 CO 3 and TiO 2 After grinding evenly according to the mass ratio of 1:13:3, put it in a corundum crucible, calcined at 800 °C for 2 h, cooled to room temperature, ground again, calcined at 1000 °C for 20 h, and repeated once; to obtain layered K 0.80 Ti 1.73 Li 0.67 o 4 compound, the resulting K 0.80 Ti 1.73 Li 0.67 o 4 The sample was added to 1000 ml of hydrochloric acid solution (1 mol / L) and stirred, and the acid was changed every 24 h. After four cycles, the product was centrifuged, and then the product was washed with deionized water until it was neutral, and dried at 60 °C. Layered H 1.07 Ti 1.73 o 4 ·H 2 O; the above layered H 1.07 Ti 1.73 o 4 •H 2 O was mixed with TBAOH (tetrabutylammonium hydroxide) (40 wt%) solution at a molar ratio of 1:1, magnetically stirred for 15 days, centrifuged at 3000 rpm, and the unstripped layer was removed t...

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Abstract

The invention discloses an ultra-thin mixed crystal titanium dioxide nanometer sheet and a preparation method and application thereof and belongs to the field of preparation of catalytic materials. The mixed crystal nanosheet comprises anatase and rutile according to a ratio of 7: 3. The length of the nanosheet is 200 to 250 nm, the width is 60 to 100 nm and the thickness is 0.6 to 1.5 nm. The mixed crystal nanosheet has an average specific surface area of about 193.3 m<2>g<-1>. One of the photocatalytic reactions of the ultra-thin mixed crystal titanium dioxide nanosheet is the reaction of photocatalytic reduction of carbon dioxide at the normal temperature under the normal pressure. Good carbon dioxide photocatalytic conversion efficiency and a high methane yield are realized. The preparation method has the advantages of simple processes, environmental friendliness, no toxicity, no damage, high reactivity, good stability, wide application range, repeatability, low energy consumption and low cost, satisfies practical production demands and has a good application potential.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to an ultra-thin mixed-crystal titanium dioxide nanosheet and a preparation method and application thereof. Background technique [0002] In recent years, semiconductor photocatalysts have attracted extensive attention due to their broad application prospects in environmental pollution control, clean energy production, and solar energy utilization. Among many photocatalysts, TiO2, as one of the most attractive photocatalysts, has many excellent properties, such as high activity, non-toxicity, long-term stability, low cost, and environmental friendliness. Titanium dioxide has three crystal forms: anatase, rutile and brookite. Among the three crystal forms, anatase has the highest reactivity, and rutile has the best thermodynamic stability, but this is not absolute. Studies have shown that in some cases the photocatalytic activity of rutile is stronger than ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B01J21/06C07C1/02C07C9/04
CPCB01J21/063B01J35/004C01G23/053C01P2002/72C01P2002/84C01P2004/04C01P2004/62C01P2006/12C01P2006/60C07C1/02C07C2521/06C07C9/04
Inventor 吴棱宋玉洁王皓梁诗景
Owner FUZHOU UNIV
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