Method for preparing indium vanadate nano particles

A technology of nano-particles and indium vanadate, which is applied in nanotechnology, chemical instruments and methods, vanadium compounds, etc., can solve the problems of less active sites on the catalyst surface, low photocatalytic activity, and small specific surface area, so as to reduce the calcination temperature, Increased specific surface area, unique process effect

Inactive Publication Date: 2012-07-25
CHANGSHA UNIVERSITY
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  • Claims
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Problems solved by technology

The photocatalytic performance of orthorhombic nano-indium vanadate is closely related to its specific surface area, but the specific surface area of ​​the indium vanadate catalyst synthesized by the current preparation method is very small, and the surface active sites of the catalyst are few, resulting in low photocatalytic activity.

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  • Method for preparing indium vanadate nano particles
  • Method for preparing indium vanadate nano particles

Examples

Experimental program
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Embodiment 1

[0018] Prepare indium nitrate, ammonium metavanadate and hexadecyltrimethylammonium bromide into solutions with concentrations of 0.5mol / L, 1.0mol / L and 0.01mol / L respectively. 1:1 mixing: then add hexadecyltrimethylammonium bromide according to the ratio of indium: vanadium: cetyltrimethylammonium bromide molar ratio of 1:1:0.02, and continue to stir for 10h; use 5mol / L of potassium hydroxide solution to adjust the pH value to 8, continue to stir for 0.5h to obtain indium vanadate sol; filter the indium vanadate sol and wash it with distilled water for 3 times, and dry at 60°C for 12h to obtain a solid powder; mix 1g of the solid powder with 25g 10mol / L potassium hydroxide solution was mixed, placed in a closed reaction kettle, and hydrothermally treated at 150oC for 24h to obtain an indium vanadate precursor (hydrothermal treatment refers to the use of high-temperature and high-pressure aqueous solution to make those insoluble or difficult to Dissolve the dissolved substanc...

Embodiment 2

[0020] Prepare indium nitrate, ammonium metavanadate and cetyltrimethylammonium bromide into solutions with concentrations of 0.8 mol / L, 1.5 mol / L and 0.03 mol / L respectively. 1:1.5 mixing: then add hexadecyltrimethylammonium bromide according to the molar ratio of indium:vanadium:cetyltrimethylammonium bromide is 1:1.5:0.03, and continue to stir for 11h; use 6mol / L of potassium hydroxide solution to adjust the pH value to 8, continue stirring for 0.8h to obtain indium vanadate sol; filter the indium vanadate sol and wash it with distilled water 4 times, and dry it at 80°C for 8h to obtain a solid powder; mix 1g of the solid powder with 35g 11mol / L potassium hydroxide solution was mixed, placed in a closed reaction kettle, and subjected to hydrothermal treatment at 160oC for 12 hours to obtain an indium vanadate precursor (hydrothermal treatment refers to the use of high-temperature and high-pressure aqueous solution to make those insoluble or difficult to Dissolve the dissol...

Embodiment 3

[0022] Prepare indium nitrate, ammonium metavanadate and hexadecyltrimethylammonium bromide into solutions with concentrations of 1.0mol / L, 2.0mol / L and 0.05mol / L respectively. Under stirring conditions, the molar ratio of indium:vanadium 1:2 mixing: then add hexadecyltrimethylammonium bromide according to the ratio of indium: vanadium: cetyltrimethylammonium bromide molar ratio of 1:2:0.05, and continue to stir for 12h; use 7mol / L of potassium hydroxide solution to adjust the pH value to 8, continue to stir for 1 h to obtain indium vanadate sol; filter the indium vanadate sol and wash it with distilled water for 5 times, and dry it at 100°C for 4 hours to obtain a solid powder; mix 1 g of the solid powder with 50 g of 12 mol / L potassium hydroxide solution mixed, placed in a closed reaction kettle, hydrothermally treated at 180oC for 8h to obtain indium vanadate precursor (hydrothermal treatment refers to the use of high temperature and high pressure aqueous solution to make ...

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Abstract

The invention relates to a method for preparing indium vanadate nano particles, The method comprises the steps of: dissolving indium nitrate, ammonium metavanadate and hexadecyl trimethyl ammonium bromide in water, mixing according to the mol ratio of indium to vanadium of 1: (1 to 2), then adding the hexadecyl trimethyl ammonium bromide according to a mol ratio of indium to vanadium to hexadecyl trimethyl ammonium bromide of 1: (1 to 2): (0.02 to 0.05), stirring for 10 to 12h, regulating a pH value to 8 by utilizing potassium hydroxide, and filtering, washing and drying generated precipitate to obtain solid powder; and mixing the solid powder with 10mol/L of potassium hydroxide solution according to a mass ratio of 1: (25 to 50), then putting into a reactor to have hydro-thermal treatment for 8 to 24h at the temperature of 150 to 180 DEG C to obtain an indium vanadate precursor, and drying the indium vanadate precursor and then placing into a muffle furnace to be baked for 1 to 2h at the temperature of 450 to 550 DEG C and then naturally cooling to obtain the indium vanadate nano particles. The method has the advantages of simpleness in operation, relatively low synthesized temperature, controllable appearance shape and high photocatalytic activity of the indium vanadate nano particles; and the application field of an indium vanadate nano material can be further widened.

Description

technical field [0001] The invention belongs to the field of preparation and application of inorganic functional materials, and relates to a method for preparing indium vanadate nanoparticles, in particular to a method for preparing small-sized indium vanadate nanoparticles based on a hydrothermal method. Background technique [0002] Indium vanadate belongs to orthovanadate (M 3+ VO 4 ) A class of compounds, including orthorhombic and monoclinic crystal systems, can be used as lithium battery anode materials, electrochromic materials, etc. In recent years, it has been found that it also has great application potential in the field of photocatalysis. Orthorhombic nano-indium vanadate has the lowest bandgap energy, only 2.0eV. It responds in the wavelength range of less than 650nm and can effectively absorb visible light. It is used in solar energy utilization, visible light photocatalytic decomposition of water, environmental protection and other fields. It has a good ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00B82Y40/00
Inventor 张世英游洋许第发张向超
Owner CHANGSHA UNIVERSITY
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