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Ag-loaded C-doped TiO2 nano-particle visible-light-driven photocatalyst and use thereof

A nanoparticle and metal-loaded technology, which is applied in the field of C-doped TiO2 nanoparticle visible light catalyst, can solve the problem of low visible light activity, achieve the effect of improving photocatalytic activity, reducing the bandgap width, and facilitating separation

Inactive Publication Date: 2015-09-09
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite the above reports, the realization of TiO 2 Catalyst response to visible light, however, is reduced by non-metal element doping on TiO 2 The band gap width makes it easier for photogenerated electrons and holes to recombine, resulting in lower visible light activity. Therefore, how to improve the visible light response of TiO 2 The efficiency of the industry is still the goal of the industry

Method used

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  • Ag-loaded C-doped TiO2 nano-particle visible-light-driven photocatalyst and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A C-doped TiO loaded with metallic Ag 2 Nano particle visible light catalyst, its preparation method is as follows:

[0022] 1) Dissolve 1g of glucose in 40mL of isopropanol and stir. After the glucose is completely dissolved, slowly add 6mL of isopropyl titanate and continue to stir. After mixing evenly, add 6mL of glacial acetic acid, then stir vigorously for 10min, and seal the reaction device, stirred and aged at room temperature for 24h, and obtained carbon-doped TiO 2 Precursor sol;

[0023] 2) Doping the prepared carbon TiO 2 The precursor sol was dried at 60°C for 3h, then calcined in a muffle furnace at 400°C for 2h, and ground to obtain C-doped TiO with a particle size of 5-10nm 2 nanoparticles;

[0024] 3) Dissolve 0.0787g of silver nitrate in 100ml of water, add 1g of C-doped TiO obtained in step 2) 2 nanoparticles, first stirred for 30min to make the Ag + Adsorption on C-doped TiO 2 The surface of the nanoparticles, and then irradiated with ultraviol...

Embodiment 2

[0027] A C-doped TiO loaded with metallic Ag 2 Nano particle visible light catalyst, its preparation method is as follows:

[0028] 1) Dissolve 0.5g of glucose in 20mL of isopropanol and stir. After the glucose is completely dissolved, slowly add 5mL of isopropyl titanate and continue stirring. Reactor, stirred and aged at room temperature for 20h, prepared carbon-doped TiO 2 Precursor sol;

[0029] 2) Doping the prepared carbon TiO 2 The precursor sol was dried at 50°C for 5h, then calcined in a muffle furnace at 350°C for 3h, and ground to obtain C-doped TiO with a particle size of 5-20nm 2 nanoparticles;

[0030] 3) Dissolve 0.0315g of silver nitrate in 100ml of water, add 1g of C-doped TiO obtained in step 2) 2 nanoparticles, first stirred for 10min to make the Ag + Adsorption on C-doped TiO 2 The surface of the nanoparticles, and then irradiated with ultraviolet light with a wavelength of 250 nm, so that the Ag + Photoreduction to metal Ag, and finally filtered, w...

Embodiment 3

[0033] A C-doped TiO loaded with metallic Ag 2 Nano particle visible light catalyst, its preparation method is as follows:

[0034] 1) Dissolve 2g of glucose in 50mL of isopropanol and stir. After the glucose is completely dissolved, slowly add 10mL of isopropyl titanate and continue stirring. After mixing evenly, add 10mL of glacial acetic acid, then vigorously stir for 30min, and seal the reaction device, stirred and aged at room temperature for 30h to prepare carbon-doped TiO 2 Precursor sol;

[0035] 2) Doping the prepared carbon TiO 2 The precursor sol was dried at 80°C for 1h, then calcined in a muffle furnace at 500°C for 1h, and ground to obtain C-doped TiO with a particle size of 5-20nm 2 nanoparticles;

[0036] 3) Dissolve 0.0157g of silver nitrate in 100ml of water, add 1g of C-doped TiO obtained in step 2) 2 nanoparticles, first stirred for 30min to make the Ag + Adsorption on C-doped TiO 2 The surface of the nanoparticles, and then irradiated with ultraviol...

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Abstract

The invention discloses an Ag-loaded C-doped TiO2 nano-particle visible-light-driven photocatalyst. Glucose as a carbon source is modified by nonmetal C so that C-doped TiO2 nano-particles are prepared, silver nitrate as a silver source and the C-doped TiO2 catalyst as a carrier material are treated under the action of simulated solar irradiation for nanometer titanium dioxide excitation so that photo electrons and cavities are produced, Ag ions are reduced into metal Ag by the photo electrons and the C-TiO2 / Ag composite photocatalyst is prepared. Through Ag carrying, a separation rate of TiO2 photo electrons and cavities is improved, a nonmetal C use-caused electron-cavity recombination rate is reduced, oxidation and reduction effects are good and photocatalytic activity is improved.

Description

technical field [0001] The invention relates to a C-doped TiO loaded with metal Ag 2 The nanoparticle visible light catalyst, and the invention also relates to the application of the catalyst in degrading the organic pesticide methyl parathion. technical background [0002] Photocatalytic oxidation technology is a water pollutant treatment technology that has attracted much attention in recent years and has been extensively studied. TiO 2 Stable chemical properties, non-toxic, cheap, mild reaction conditions, wide-spectrum purification objects, and no secondary pollution, are considered to be a promising deep purification technology for environmental pollution. But with TiO 2 As a photocatalyst to treat wastewater, it is still in the laboratory stage, and the main reason why it has not yet entered practical application is pure TiO 2 Photocatalytic activity can only be found under ultraviolet light with a wavelength of less than 387nm (this part of light only accounts for...

Claims

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Application Information

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IPC IPC(8): B01J23/50C02F1/30C02F101/30
CPCY02W10/37
Inventor 刘广龙朱端卫赵建伟周文兵蔡建波华玉妹万小琼
Owner HUAZHONG AGRI UNIV
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