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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 nanosheet and its preparation method and application, and belongs to the field of preparation of catalytic materials. The mixed crystal nanosheet is composed of two phases: anatase and rutile, and the ratio of the two phases is 7:3. The dimensions of this nanosheet are: a length of 200~250 nm, a width of 60~100nm, and a thickness of 0.6~1.5nm. The average specific surface area of ​​the mixed crystal nanosheets is approximately 193.3m2 g-1. One of the photocatalytic reactions used by the ultra-thin mixed-crystal titanium dioxide nanosheets is the photocatalytic reduction of carbon dioxide at normal temperatures and pressures, and exhibits better photocatalytic conversion efficiency of carbon dioxide and higher methane yield. The invention has simple process, is environmentally friendly and green, non-toxic and harmless, has high reactivity, good stability, wide application fields, reusable, low energy consumption, low cost, meets actual production needs, and has great 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
CPCC01G23/053C07C1/02B01J21/063C01P2002/84C01P2004/04C01P2002/72C01P2006/60C01P2004/62C01P2006/12C07C2521/06B01J35/39C07C9/04
Inventor 吴棱宋玉洁王皓梁诗景
Owner FUZHOU UNIV
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