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SnS2/TiO2 photocatalyst filter screen and preparation method thereof

A photocatalyst and filter screen technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem that nano-titanium oxide powder cannot be reused, shorten the time used, and the process is simple and environmentally friendly. , the effect of improving the photocatalytic degradation efficiency

Inactive Publication Date: 2017-02-01
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a recyclable SnS in order to solve the technical problem that the above-mentioned nano-titanium oxide powder cannot be reused. 2 / TiO 2 Photocatalyst filter, on the surface of the titanium mesh, titanium oxide nanosheets or nanowires are grown, and the filter can be reused

Method used

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  • SnS2/TiO2 photocatalyst filter screen and preparation method thereof
  • SnS2/TiO2 photocatalyst filter screen and preparation method thereof
  • SnS2/TiO2 photocatalyst filter screen and preparation method thereof

Examples

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Embodiment 1

[0030] (1) Soak the cleaned titanium mesh in a mixture of polyethylene glycol and sodium hydroxide, wherein the volume ratio of polyethylene glycol PEG: water is 1:1, and the concentration of sodium hydroxide solution is 0.5M. Add 0.2M urea to carry out hydrothermal reaction, the hydrothermal temperature is 220°C, and the hydrothermal time is 25 hours. After the hydrothermal reaction, the titanium mesh was washed with water, soaked in 0.1M hydrochloric acid for 1 hour, washed with water, and dried. Put it into an annealing furnace, heat it to 400°C, keep it warm for 2 hours, and cool down with the furnace. A filter screen with titanium oxide nanowires grown on the surface is prepared.

[0031] (2) Put the filter screen grown with titanium oxide nanowires into the hydrothermal tank, and the hydrothermal agent is SnCl 4 0.1M, EDTA concentration is 0.1M, Na 2 S concentration is 0.2M, SnCl 4 :Na 2 The S molar ratio is 1:2.0. The hydrothermal temperature is 110°C, and the hy...

Embodiment 2

[0034] (1) Soak the cleaned titanium screen in a mixture of polyethylene glycol, urea and sodium hydroxide, wherein the polyethylene glycol PEG: water volume ratio is 0.2:1, and the concentration of sodium hydroxide solution is 0.5M . Add 0.5M urea to carry out hydrothermal reaction, the hydrothermal temperature is 160°C, and the hydrothermal time is 5 hours. After the hydrothermal reaction, the titanium mesh was washed with water, soaked in 0.1M hydrochloric acid for 1 hour, washed with water, and dried. Put it into an annealing furnace, heat it to 500°C, keep it warm for 2 hours, and cool it with the furnace. A filter screen with titanium oxide nanosheets grown on the surface was prepared.

[0035] (2) Put the filter screen grown with titanium oxide nanosheets into the hydrothermal tank, and the hydrothermal agent is SnCl 4 0.3M, EDTA concentration is 0.1M, ammonia concentration is 1M, Na 2 S concentration is 0.78M, SnCl 4 :Na 2 The molar ratio of S is 1:2.6. The hyd...

Embodiment 3

[0039] (1) Soak the cleaned titanium screen in a mixture of polyethylene glycol, urea and sodium hydroxide, wherein polyethylene glycol PEG: water volume ratio is 0.5:1, urea 0.8M, sodium hydroxide solution Concentration 0.5M. Carry out hydrothermal reaction, hydrothermal temperature 200 ℃, hydrothermal time 15 hours. After the hydrothermal reaction, the titanium mesh was washed with water, soaked in 0.1M hydrochloric acid for 1 hour, washed with water, and dried. Put it into an annealing furnace, heat it to 700°C, keep it warm for 4 hours, and cool down with the furnace. A filter screen with titanium oxide nanowires grown on the surface is prepared.

[0040] (2) Put the filter screen grown with titanium oxide nanowires into the hydrothermal tank, and the hydrothermal agent is SnCl 4 0.2M, EDTA concentration is 0.1M, thioacetamide concentration is 0.24M, ammonia concentration is 0.1M, SnCl 4 : Thioacetamide molar ratio is 1:2.2. The hydrothermal temperature is 130°C, and...

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Abstract

The invention relates to a SnS2 / TiO2 photocatalyst filter screen and a preparation method thereof. The surface structure of a Ti wire mesh is provided with honeycomb TiO2 nano-sheets / nano-wires and SnS2 nano-particles. The specific preparation process includes the steps: (1) synthesizing titanium oxide nano-wires / nano-sheets by taking the titanium wire mesh as a substrate and taking NaOH solution containing PEG (polyethylene glycol) and urea; (2) growing SnS2 nano-particles on the titanium wire mesh with the titanium oxide nano-wires / nano-sheets growing on the surface by a double hydrothermal method and by taking SnC14 and Na2S EDTA (ethylene diamine tetraacetic acid) solution as hydrothermal agents. The prepared SnS2 / TiO2 photocatalyst filter screen has pollution degradation performance, recyclability and the like. After particles and other degradation products are adsorbed on the surface of the filter screen, photo-degradation performances can be restored after the filter screen is washed and activated by ultraviolet irradiation. The filter screen is simple in preparation process, structurally controllable and applicable to batch production.

Description

technical field [0001] The present invention relates to a kind of SnS 2 / TiO 2 A photocatalyst filter screen and a preparation method thereof are used for recycling photodegradation pollutants, and belong to the field of nanometer functional materials and environmental protection materials. Background technique [0002] Due to the aggravation of environmental pollution, the treatment of air pollution and water pollution has gradually been paid attention to. However, due to the complex composition of pollutants, wide range of pollution, and scattered distribution, traditional centralized pollution treatment methods are not applicable. Especially the organic pollutants in the air and sewage are difficult to deal with. TiO 2 It has the advantages of stable chemical properties, non-toxicity, low cost, and no secondary pollution, and is widely used in the field of environmental protection. However, the most commonly used titanium oxide nanopowders have the following problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/04
CPCB01J27/04B01J35/56B01J35/39B01J35/40
Inventor 陈爱英孙家文陶亦然苏志晟马瑶陶锦王现英
Owner UNIV OF SHANGHAI FOR SCI & TECH
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