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Preparation method of carbon and nitrogen doped niobium (V) pentoxide nano sheet and application of nano sheet as photocatalyst

A technology of niobium pentoxide and nanosheets, applied in the fields of nanomaterials and catalysis, can solve the problems of many steps and low synthesis efficiency, and achieve the effects of low reaction temperature, low cost and large specific surface area

Active Publication Date: 2016-03-09
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has many steps and low synthesis efficiency

Method used

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  • Preparation method of carbon and nitrogen doped niobium (V) pentoxide nano sheet and application of nano sheet as photocatalyst
  • Preparation method of carbon and nitrogen doped niobium (V) pentoxide nano sheet and application of nano sheet as photocatalyst
  • Preparation method of carbon and nitrogen doped niobium (V) pentoxide nano sheet and application of nano sheet as photocatalyst

Examples

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Embodiment 1

[0023] A method for preparing niobium pentoxide nanosheets doped with carbon and nitrogen, comprising the steps of:

[0024] At room temperature (10-40°C), 3.24g of niobium pentachloride was dissolved in 40ml of absolute ethanol, ultrasonicated for 10 minutes to form a clear and transparent solution, and then 25ml of 25% tetramethanone was added dropwise to the ethanol solution Base ammonium hydroxide solution, control the rate of addition of 0.27ml / min, stirred for 30 minutes to obtain a clear solution. Transfer the solution to a 100ml reaction kettle with a polytetrafluoroethylene liner, conduct a hydrothermal reaction at 240°C for 24 hours, cool to room temperature, filter with filter paper, wash with 2000-3000ml of distilled water, and then wash with absolute ethanol washing. The filtrate was dried at 100° C. for 8 hours to obtain niobium pentoxide nanosheets. The obtained niobium pentoxide nanosheets were calcined in a nitrogen atmosphere at 500° C. in a muffle furnace ...

Embodiment 2

[0031] A method for preparing niobium pentoxide nanosheets doped with carbon and nitrogen, comprising the steps of:

[0032] At room temperature (10-40°C), 3.24g of niobium pentachloride was dissolved in 40ml of absolute ethanol, ultrasonicated for 10 minutes to form a clear and transparent solution, and then 30ml of 25% tetraethyl ethyl chloride was added dropwise to the ethanol solution Base ammonium hydroxide solution, control the rate of addition of 0.27ml / min, stirred for 30 minutes to obtain a clear solution. Transfer the solution to a 100ml reaction kettle with a polytetrafluoroethylene liner, and conduct a hydrothermal reaction at 220°C for 24 hours. After cooling to room temperature, filter with filter paper, wash with 2000-3000ml of distilled water, and then wash with absolute ethanol washing. The filtrate was dried at 100° C. for 8 hours to obtain niobium pentoxide nanosheets. The obtained niobium pentoxide nanosheets were calcined in a nitrogen atmosphere at 400°...

Embodiment 3

[0034] A method for preparing niobium pentoxide nanosheets doped with carbon and nitrogen, comprising the steps of:

[0035] At room temperature (10-40°C), 1.5g of ammonium niobium oxalate was dissolved in 30ml of absolute ethanol, ultrasonicated for 10 minutes to form a clear and transparent solution, and then 35ml of 25% tetramethyl Ammonium hydroxide solution was controlled at a rate of 0.27ml / min, and stirred for 30 minutes to obtain a clear solution. Transfer the solution to a 100ml reaction kettle with a polytetrafluoroethylene liner, conduct a hydrothermal reaction at 250°C for 24 hours, cool to room temperature, filter with filter paper, wash with 2000-3000ml of distilled water, and then wash with absolute ethanol washing. The filtrate was dried at 100° C. for 8 hours to obtain niobium pentoxide nanosheets. The obtained niobium pentoxide nanosheets were calcined in a nitrogen atmosphere at 600° C. in a muffle furnace for 2 hours to obtain carbon and nitrogen doped ni...

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Abstract

The invention discloses a preparation method of a carbon and nitrogen doped niobium (V) pentoxide nano sheet and an application of the nano sheet as a photocatalyst. The preparation method comprises the following steps: weighing soluble niobium salt at a room temperature, adding anhydrous ethanol to form an ethanol solution of niobium salt, dropwise adding an organic ammonium hydroxide solution into the ethanol solution of niobium salt, wherein in the initial phase, white turbidity appears, keeping on adding the organic ammonium hydroxide solution until the white turbidity disappears so as to form a clear and transparent solution; transferring the obtained solution to a hydrothermal reactor, wherein the solution accounts for 50 to 70% of the volume of the hydrothermal reactor, carrying out hydrothermal reactions at a temperature of 100 to 280 DEG C, after reactions, naturally cooling the reactor to the room temperature, washing and drying the reaction product to obtain white powder; and burning the white powder for 2 to 12 hours at a temperature of 400 to 1200 under the protection of nitrogen gas so as to obtain the carbon and nitrogen doped niobium (V) pentoxide nano sheet. The invention also discloses an application of the carbon and nitrogen doped niobium (V) pentoxide nano sheet as a photocatalyst. The photocatalyst can be applied to benzyl alcohol oxidation to prepare benzaldehyde.

Description

technical field [0001] The invention relates to the field of nanomaterials and catalysis, in particular to a method for preparing niobium pentoxide nanosheets doped with carbon and nitrogen and its application as a photocatalyst. Background technique [0002] Two-dimensional nanomaterials such as graphene, molybdenum disulfide (MoS 2 ) nano film, TiO 2 Nanofilms, ZnO nanosheets, etc. have been widely used in photocatalytic degradation of dyes, photocatalytic methane conversion reactions, photocatalytic water splitting for hydrogen production, and photocatalytic reactions due to their large specific surface area and abundant catalytic reaction active sites on the edges of layered materials. Synthetic organic matter and other photocatalytic fields. In semiconductor catalysts, Nb 2 o 5 Although it is a wide bandgap oxide (3.2-4.0eV), Nb 2 o 5 It has the advantages of acid and alkali resistance, light corrosion resistance, etc., and has attracted the attention of researche...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C45/38C07C47/54
Inventor 陈俊利张永辉张爱勤黄改玲张智强李明玉方少明
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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