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Preparation method of laser induced mono-disperse Ag-Ag2S nano-particle photocatalyst

A nanoparticle, laser-induced technology, applied in physical/chemical process catalysts, chemical instruments and methods, light water/sewage treatment, etc., to achieve the effect of simple method and excellent adsorption performance

Inactive Publication Date: 2017-03-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is no laser-induced monodisperse Ag-Ag 2 Report on S Nanoparticle Photocatalyst

Method used

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  • Preparation method of laser induced mono-disperse Ag-Ag2S nano-particle photocatalyst
  • Preparation method of laser induced mono-disperse Ag-Ag2S nano-particle photocatalyst
  • Preparation method of laser induced mono-disperse Ag-Ag2S nano-particle photocatalyst

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Effect test

Embodiment 1

[0023] A laser-induced monodisperse Ag-Ag 2 The preparation method of S nanoparticle photocatalyst comprises the steps:

[0024] (1) Add reaction liquid in rotating container, described reaction liquid is the aqueous solution containing TAA and CTAB, and the concentration of described TAA is 0.2M, and the concentration of CTAB is 0.05M;

[0025] (2) The Ag sheet is immersed in the reaction solution after polishing, and rotated for 30 minutes at 350 rpm;

[0026] (3) Under the conditions of emitting laser wavelength 1064nm, pulse duration 10ns, and frequency of 10Hz, the laser beam is focused on the Ag sheet in the rotating container by a quartz lens with a focal length of 65mm for 30min, so that the average diameter of the laser beam on the surface of the Ag sheet is 370μm, the laser power density is 6~9GW / cm 2 ;

[0027] (4) Take out the Ag sheet after laser irradiation from the rotating container, rinse the product collected on the surface of the Ag sheet after laser irra...

Embodiment 2

[0029] A laser-induced monodisperse Ag-Ag 2 The preparation method of S nanoparticle photocatalyst comprises the steps:

[0030] (1) Add reaction liquid in rotating container, described reaction liquid is the aqueous solution containing TAA and CTAB, and the concentration of described TAA is 0.2M, and the concentration of CTAB is 0.05M;

[0031] (2) The Ag sheet is immersed in the reaction solution after polishing, and rotated for 40 minutes at 300 rpm;

[0032] (3) Under the conditions of emitting laser wavelength 1064nm, pulse duration 10ns, and frequency of 10Hz, the laser beam is focused on the Ag sheet in the rotating container by a quartz lens with a focal length of 65mm for 30min, so that the average diameter of the laser beam on the surface of the Ag sheet is 370μm, the laser power density is 6~9GW / cm 2 ;

[0033] (4) Take out the Ag sheet after laser irradiation from the rotating container, rinse the product collected on the surface of the Ag sheet after laser irra...

Embodiment 3

[0035] A laser-induced monodisperse Ag-Ag 2 The preparation method of S nanoparticle photocatalyst comprises the steps:

[0036] (1) Add reaction liquid in rotating container, described reaction liquid is the aqueous solution containing TAA and CTAB, and the concentration of described TAA is 0.2M, and the concentration of CTAB is 0.05M;

[0037] (2) The Ag sheet is immersed in the reaction solution after polishing, and rotated for 20 minutes at 400 rpm;

[0038] (3) Under the conditions of emitting laser wavelength 1064nm, pulse duration 10ns, and frequency of 10Hz, the laser beam is focused on the Ag sheet in the rotating container by a quartz lens with a focal length of 65mm for 30min, so that the average diameter of the laser beam on the surface of the Ag sheet is 370μm, the laser power density is 6~9GW / cm 2 ;

[0039] (4) Take out the Ag sheet after laser irradiation from the rotating container, rinse the product collected on the surface of the Ag sheet after laser irra...

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Abstract

The invention discloses a preparation method of a laser induced mono-disperse Ag-Ag2S nano-particle photocatalyst. The preparation method comprises the following steps: (1) adding an aqueous solution containing thioacetamide and hexadecyl trimethyl ammonium bromide into a rotary container as a reaction solution; (2) immerging a polished Ag sheet in the reaction solution, and performing rotation; (3) focusing laser beams on the Ag sheet in the rotary container by virtue of a quartz lens; and (4) taking the Ag sheet after laser radiation out of the rotary container, rinsing a product collected on the surface of the Ag sheet after laser radiation by using distilled water, performing centrifugation, and drying a deposited product to obtain the photocatalyst. The preparation method disclosed by the invention is simple, and the Ag-Ag2S nano-particle photocatalyst prepared by the method shows the superior performance of removing methyl blue (MB) in wastewater, and the MB removal rate within 5min in visible light can reach 99.83%; and after absorption and degradation of organic matters, settling separation of a nano material without external force is achieved.

Description

technical field [0001] The invention belongs to the field of water body purification and relates to a laser-induced monodisperse Ag-Ag 2 S nanoparticle photocatalyst and preparation method thereof. Background technique [0002] Some organic pollutants in groundwater are highly toxic and even fatal to aquatic organisms, including humans and other terrestrial organisms. More and more evidence shows that the organic pollutants discharged into water bodies by electroplating, textile industry, cosmetics, pharmaceuticals and other industries are the main reasons for the increase in the incidence of human kidney, liver and bladder cancer. Methylene blue (MB) and methyl orange (MO) are relatively common organic pollutants with complex aromatic molecular structures, usually stable to light, heat or oxidants, and very difficult to separate and degrade from wastewater. Conventional treatment technologies for removing organic dyes in wastewater include chemical precipitation, biologic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J27/04C02F1/30B01J20/30C02F103/06
CPCB01J20/02B01J20/0233B01J20/0266C02F1/30B01J27/04C02F2101/308C02F2103/06B01J35/39
Inventor 刘宪华林青霞赵杨
Owner TIANJIN UNIV
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