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Preparation method of phosphorus, nitrogen and molybdenum ternary codoped nanometer TiO2 photocatalyst

A photocatalyst and co-doping technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limiting TiO, achieve excellent photocatalytic performance, good degradation effect, and improve photocatalytic performance. The effect of absorbing properties

Inactive Publication Date: 2013-12-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to TiO 2 It is a wide-bandgap semiconductor with an energy band width of about 3.0-3.2eV. Only ultraviolet light with a wavelength of less than 387nm can be absorbed by TiO 2 absorption, which greatly limits the TiO 2 wide application of

Method used

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  • Preparation method of phosphorus, nitrogen and molybdenum ternary codoped nanometer TiO2 photocatalyst
  • Preparation method of phosphorus, nitrogen and molybdenum ternary codoped nanometer TiO2 photocatalyst
  • Preparation method of phosphorus, nitrogen and molybdenum ternary codoped nanometer TiO2 photocatalyst

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Embodiment 1

[0024] Preparation of ternary co-doped nano-TiO by sol-gel method 2 Photocatalyst (0.005P,Mo,N)-TiO 2 , in which tetrabutyl titanate is used as the precursor of titanium, ammonium phosphomolybdate is used as the precursor of P, Mo, and N doping elements, and cetyltrimethylammonium bromide (CTAB) is used as the surfactant. The specific operation steps are as follows: add 17mL tetrabutyl titanate to 44mL ethanol, stir for 30 minutes until the mixture is uniform, and obtain solution A; then add 15mL secondary deionized water, an appropriate amount of 70% concentrated nitric acid, 44mL ethanol, 1gCTAB Mix with 0.4788g ammonium phosphomolybdate, stir evenly to obtain solution B; under the condition of vigorous stirring, add solution B dropwise to solution A (0.1L / h), to obtain a yellow-green sol; Gel at ℃ for 24 hours, then dry at 60℃ for 10 hours to obtain xerogel; finally bake the xerogel in air at 400℃ for 4 hours to obtain TiO 2 catalyst of light. figure 1 Middle curve (a) i...

Embodiment 2

[0026] Preparation of ternary co-doped nano-TiO by sol-gel method 2 Photocatalyst (0.01P,Mo,N)-TiO 2 , in which tetrabutyl titanate is used as the precursor of titanium, ammonium phosphomolybdate is used as the precursor of P, Mo, and N doping elements, and cetyltrimethylammonium bromide (CTAB) is used as the surfactant. The specific operation steps are as follows: add 30mL tetrabutyl titanate to 80mL ethanol, stir for 30 minutes until the mixture is uniform, and obtain solution A; then add 28mL secondary deionized water, an appropriate amount of 70% concentrated nitric acid, 80mL ethanol, 2gCTAB Mix with 1.9154g of ammonium phosphomolybdate, stir evenly to obtain solution B; under the condition of vigorous stirring, add solution B dropwise to solution A (dropping speed is 0.1L / h), to obtain a yellow-green sol; The sol was gelled at 25°C for 24 hours, then dried at 60°C for 10 hours to obtain a xerogel; finally, the xerogel was baked in air at 400°C for 4 hours to obtain TiO ...

Embodiment 3

[0028] Preparation of ternary co-doped nano-TiO by sol-gel method 2 Photocatalyst (0.03P,Mo,N)-TiO 2 , in which tetrabutyl titanate is used as the precursor of titanium, ammonium phosphomolybdate is used as the precursor of P, Mo, and N doping elements, and cetyltrimethylammonium bromide (CTAB) is used as the surfactant. The specific operation steps are as follows: add 8mL tetrabutyl titanate to 25mL ethanol, stir for 15 minutes until the mixture is uniform, and obtain solution A; then add 7mL secondary deionized water, an appropriate amount of 70% concentrated nitric acid, 25mL ethanol, 1gCTAB Mix with 1.4365g ammonium phosphomolybdate, stir evenly to obtain solution B; under the condition of vigorous stirring, add solution B dropwise to solution A (dropping speed is 0.1L / h), to obtain yellow-green sol; The sol was gelled at 25°C for 24 hours, then dried at 60°C for 10 hours to obtain a xerogel; finally, the xerogel was baked in air at 400°C for 4 hours to obtain TiO 2 cata...

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Abstract

Belonging to the technical field of nanometer photocatalytic materials, the invention discloses a preparation method of a phosphorus, nitrogen and molybdenum ternary codoped nanometer TiO2 photocatalyst. The method takes ammonium phosphomolybdate as a precursor of doping elements, and adopts a sol-gel technique to prepare the phosphorus, nitrogen and molybdenum ternary codoped nanometer TiO2 photocatalyst. Due to proper selection of the doping precursor, the three elements P, N and Mo can be incorporated into TiO2 by one step, thus greatly reducing the operation steps, and being in favor of improving preparation efficiency and saving cost. The (P, Mo, N) ternary codoped nanometer TiO2 shows excellent photocatalytic properties under visible light, has good degradation effects on both dyes and organic matters not absorbing visible light, and its photocatalytic efficiency exceeds that of the internationally renowned TiO2 commodity DeussaP25. In short, the preparation method disclosed in the invention is simple, and has good industrial prospects.

Description

technical field [0001] The invention relates to the technical field of nanometer photocatalytic materials, in particular to a phosphorus-nitrogen-molybdenum ternary co-doped nano-TiO 2 Preparation method of photocatalyst. Background technique [0002] TiO 2 Due to the advantages of high photocatalytic efficiency, strong chemical stability, non-toxicity and low cost, photocatalyst has certain potential application value in the field of energy and environment. At present, its applications in solar dye-sensitized cells (DSSC), self-cleaning materials, bactericidal materials and environmental pollution control have begun to take shape. However, due to TiO 2 It is a wide-bandgap semiconductor with an energy band width of about 3.0-3.2eV. Only ultraviolet light with a wavelength of less than 387nm can be absorbed by TiO 2 absorption, which greatly limits the TiO 2 wide application. In today's era of energy shortage and serious environmental pollution, human beings are making...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19C02F1/30
Inventor 沈艳芳崔新宇吴杰熊天英
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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