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A kind of photocatalytic thin film based on titanium nitride and titanium oxide and preparation method thereof

A photocatalytic thin film, titanium oxide technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of low production efficiency, complex equipment, unfavorable industrial application, etc., and achieve the improvement effect. , narrow the forbidden band width, improve the effect of photocatalysis

Active Publication Date: 2021-06-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are difficulties in the separation and recovery of powder photocatalysts in the application, and the technical equipment such as magnetron sputtering is complicated and the production efficiency is low, which is not conducive to industrial application

Method used

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  • A kind of photocatalytic thin film based on titanium nitride and titanium oxide and preparation method thereof
  • A kind of photocatalytic thin film based on titanium nitride and titanium oxide and preparation method thereof
  • A kind of photocatalytic thin film based on titanium nitride and titanium oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1. Make the area 5×5cm 2 Immerse the cleaned titanium sheet in 50mL of hydrogen peroxide solution with a mass concentration of 6%, add 1mL of nitric acid with a mass fraction of 0.05% and 10mg of melamine at the same time, react at 80°C for 72 hours, take it out and dry it completely after cleaning, and dry it at 400 ℃ air atmosphere heat treatment for 3 hours, obtained on the titanium substrate growth TiO 2 Thin films of nanowire arrays;

[0029] Step 2, loading TiO on the titanium sheet 2 The samples of nanowires were heat-treated at 750°C for 3 hours in an ammonia atmosphere with a flow rate of 100mL / min to obtain TiN 0.3 / TiO 0.89 One-dimensional nanowire films;

[0030] Step 3: Add 100 mL of deionized water, 1.75 g of glycine, 0.6 mL of 63% nitric acid and 1.25 g of titanyl sulfate into the porcelain crucible. The crucible was transferred to a heat treatment furnace at 400°C for solution combustion reaction to obtain a fluffy black powder. Add 0.5g of bl...

Embodiment 2

[0034] Step 1. Make the area 5×5cm 2Immerse the cleaned titanium sheet in 50mL of hydrogen peroxide solution with a mass concentration of 30%, add 1mL of nitric acid with a mass fraction of 5% and 100mg of melamine at the same time, react at 80°C for 72 hours, take it out and dry it completely after cleaning, and dry it at 550 ℃ air atmosphere heat treatment for 3 hours, obtained on the titanium substrate growth TiO 2 Thin films of nanowire arrays;

[0035] Step 2, loading TiO on the titanium sheet 2 The samples of nanowires were heat-treated at 900°C for 3 hours in an ammonia atmosphere with a flow rate of 100mL / min to obtain TiN 0.3 / TiO 0.89 One-dimensional nanowire films;

[0036] Step 3: Add 100 mL of deionized water, 1.75 g of glycine, 0.6 mL of 63% nitric acid and 1.25 g of titanyl sulfate into the porcelain crucible. The crucible was transferred to a heat treatment furnace at 400°C for solution combustion reaction to obtain a fluffy black powder. Add 1g of black ...

Embodiment 3

[0040] Step 1. Make the area 5×5cm 2 Immerse the cleaned titanium sheet in 50mL of hydrogen peroxide solution with a mass concentration of 20%, add 1mL of nitric acid with a mass fraction of 2.5% and 100mg of melamine at the same time, react at 80°C for 72 hours, take it out and clean it, dry it completely, and dry it at 550 ℃ air atmosphere heat treatment for 3 hours, obtained on the titanium substrate growth TiO 2 Thin films of nanowire arrays;

[0041] Step 2, loading TiO on the titanium sheet 2 The samples of nanowires were heat-treated at 800°C for 2 hours in an ammonia atmosphere with a flow rate of 100mL / min to obtain TiN 0.3 / TiO 0.89 One-dimensional nanowire films;

[0042] Step 3: Add 100 mL of deionized water, 1.75 g of glycine, 0.6 mL of 63% nitric acid and 1.25 g of titanyl sulfate into the porcelain crucible. The crucible was transferred to a heat treatment furnace at 400°C for solution combustion reaction to obtain a fluffy black powder. Add 0.5g of black ...

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Abstract

The invention discloses a photocatalytic thin film based on titanium nitride and titanium oxide and a preparation method thereof. The film was grown on a titanium metal substrate by TiN 0.3 / TiO 0.89 Nanowire arrays as the backbone and anatase TiO wrapped around the backbone 2 The nanosheet branches form a three-dimensional nanoarray. The main preparation process is: within a certain temperature range, the titanium sheet is reacted in the reaction solution containing hydrogen peroxide for a certain period of time, and then undergoes high-temperature heat treatment in an ammonia atmosphere to obtain TiN 0.3 / TiO 0.89 Nanowire array: the nanowire array is placed in the solution combustion precursor solution for a certain period of time, and then subjected to subsequent high-temperature heat treatment in an air atmosphere to finally obtain a titanium nitride / titanium oxide three-dimensional nanoarray film. The film has excellent photocatalytic activity under simulated sunlight irradiation.

Description

technical field [0001] The invention relates to a photocatalytic thin film based on titanium nitride and titanium oxide and a preparation method thereof, which belongs to the technical field of photocatalysis and can be used in environmental protection fields such as air purification and sewage treatment. Background technique [0002] Semiconductor photocatalysis technology uses photons to excite electrons in the valence band of semiconductor materials to the conduction band to generate photogenerated carriers. Using the separated photogenerated carriers, specific redox reactions can be triggered to achieve the degradation and removal of pollutants in the atmosphere or sewage. Nanostructured TiO 2 It is the most ideal semiconductor photocatalyst in current practical applications due to its low price, stable performance and environmental friendliness. Numerous boosted TiO 2 In photocatalytic efficiency technology, loading Au, Ag and other nanoparticles can generate surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/06B01J37/12B01J37/08C02F1/30C02F1/72C02F101/38C02F101/30
CPCB01J27/24B01J37/12B01J37/08C02F1/30C02F1/725C02F2101/38C02F2101/308C02F2305/10B01J35/59B01J35/40B01J35/39
Inventor 顾伊杰吴进明高文炜孟琥
Owner ZHEJIANG UNIV
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