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A doped grafted nano-tio with visible light catalytic activity 2 and its preparation method

A catalytic activity, visible light technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of unsatisfactory catalytic effect, limit practical application, etc. The effect of good visible light catalytic activity and broad application prospects

Inactive Publication Date: 2016-08-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, overall, their catalytic effects are still unsatisfactory, which limits their practical applications. Therefore, the development of TiO with stronger photocatalytic activity under sunlight or natural light 2 appears extremely necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 In an ice-water bath, 3 ml of TiCl 4 Slowly added dropwise to 200 ml of 0.2mol / L dilute hydrochloric acid to obtain TiCl 4 solution; 0.07 g of FeCl 3 ·6H 2 O and 0.05 g CO(NH 2 ) 2 dissolved in 10 mL of deionized water to obtain a dopant solution, which was slowly added to the TiCl 4 solution, stir evenly, then add ammonia solution drop by drop, adjust the pH value of the solution to 9, and obtain a precipitate, filter the resulting precipitate and wash it with deionized water until no chloride ions are detected, collect the precipitate and disperse it in deionized water , after adding 20 ml of H 2 o 2 , stirred to a transparent solution, heated and refluxed at 110°C for 24 hours to obtain iron and nitrogen co-doped nano-TiO 2 homogeneous solution.

[0020] To this homogeneous solution was added 0.023 g of CuCl 2 2H 2 O, heated and stirred at 90°C for 1h, collected the precipitate and filtered it with a 0.025µm membrane, washed twice with a large amo...

Embodiment 2

[0021] Example 2 In an ice-water bath, 2 ml of TiCl 4 Slowly added dropwise to 200 ml of 0.1mol / L dilute hydrochloric acid to obtain TiCl 4 solution; 0.07 g of FeCl 3 ·6H 2 O and 0.05 g CO(NH 2 ) 2 dissolved in 10 mL of deionized water to obtain a dopant solution, which was slowly added to the TiCl 4 solution, stir evenly, then add ammonia solution drop by drop, adjust the pH value of the solution to 10, and obtain a precipitate, filter the resulting precipitate and wash it with deionized water until no chloride ions are detected, collect the precipitate and disperse it in deionized water , after adding 10 mL of H 2 o 2, stirred to a transparent solution, heated and refluxed at 105°C for 48 hours to obtain iron and nitrogen co-doped nano-TiO 2 homogeneous solution.

[0022] To this homogeneous solution was added 0.02 g of CuCl 2 2H 2 O, heated and stirred at 90°C for 1h, collected the resulting precipitate and filtered it with a 0.025µm membrane, washed twice with a ...

Embodiment 3

[0023] Example 3 In an ice-water bath, 3 ml of TiCl 4 Slowly added dropwise to 200 ml of 0.2mol / L dilute hydrochloric acid to obtain TiCl 4 solution; 0.10 g of MnCl 2 4H 2 O and 0.08 g CO(NH 2 ) 2 dissolved in 10 mL of deionized water to obtain a dopant solution, which was slowly added to the TiCl 4 solution, stir evenly, then add ammonia solution drop by drop, adjust the pH value of the solution to 11, and obtain a precipitate, filter the obtained precipitate and wash it with deionized water until no chloride ion is detected, collect the precipitate and disperse it in deionized water , after adding 20 ml of H 2 o 2 , stirred to a transparent solution, heated and refluxed at 110°C for 24 hours to obtain manganese and nitrogen co-doped nano-TiO 2 homogeneous solution.

[0024] Add 0.03 g of Fe(NO 3 ) 3 9H 2 O, heated and stirred at 90°C for 1h, collected the precipitate and filtered it with a 0.025µm membrane, washed twice with a large amount of deionized water, and ...

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Abstract

The invention relates to doped and grafted nano TiO2 with the visible-light catalytic activity and a preparation method of the doped and grafted nano TiO2. The preparation method of the doped and grafted nano TiO2 comprises the following steps: firstly adding a dopant solution into TiCl4 solution, uniformly stirring and adjusting the pH value of the solution by ammonia water solution to generate sediment, filtering and washing the sediment until no chloridion is detected, then dispersing the sediment in deionized water, subsequently adding H2O2, uniformly stirring, heating and reflowing to obtain a doped nano TiO2 solution; then adding metal salt, heating and stirring, filtering, washing and drying the sediment to obtain the product. The doped and grafted nano TiO2 prepared by the method is capable of quickly degrading dyes such as methylene blue, has the remarkable visible-light catalytic activity and is mild in preparation condition, simple in preparation method and low in cost, and can be widely applied to fields of sewage treatment, antibacterial coatings, self-cleaning and the like.

Description

technical field [0001] The present invention relates to nanometer TiO 2 In the field of visible light catalysis, specifically, it involves a kind of nano-TiO with good visible light catalytic activity, co-doped with metal and nitrogen, and grafted with metal ions. 2 and its preparation method. Background technique [0002] In 1972, Fujishima and Honda were studying the effect of light radiation on TiO 2 The role of the electrode was first discovered when TiO 2 It has a photocatalytic effect, decomposes water into oxygen and hydrogen under ultraviolet light, and pulls away TiO 2 The prologue of the research. After long-term exploration and rich accumulation, TiO 2 It has good application prospects in the fields of new energy utilization, sewage and indoor air pollution purification, self-cleaning, antibacterial coatings, etc., and has become one of the important research topics to solve energy crisis and environmental pollution. However, pure TiO 2 The light wavelength...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J21/06
Inventor 穆畅道彭健根李德富
Owner SICHUAN UNIV
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