Preparation and application methods of high-efficiency composite photocatalytic material

A composite photocatalytic and high-efficiency technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of inexpensive materials and complex equipment, achieve low cost, simple preparation process, and reduce The effect of electron-hole recombination probability

Inactive Publication Date: 2015-01-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in CN103920482A, zirconium-doped perovskite-type photocatalysts are used to improve photocatalytic performance, but this method requires high-temperature calcination and the material is not cheap; in CN102974378A, low-energy nitrogen ion beams are used to bombard str

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Dissolve 0.006 mol of citric acid in 15 ml of absolute ethanol, quickly add 0.005 mol of isopropyl titanate, stir for a while, start ultrasonic (60 Hz), and add 20 mL of 0.25 mol L dropwise -1 Strontium nitrate solution and 25mL 2mol L -1 sodium hydroxide solution. After fully stirring and ultrasonicating, the whole system was transferred to a hydrothermal kettle lined with polytetrafluoroethylene, heated to 180°C and maintained for 36h. After the reaction, cool to room temperature, wash the product with deionized water, acetic acid and ethanol in sequence, and dry it in vacuum for 8 hours; weigh 0.50g of strontium titanate and dissolve it in 20ml of deionized water and 20ml of absolute ethanol, and pipette 3.1mL of 0.0001mol ·L -1 Sodium molybdate solution and 5.0mL 0.001mol L -1 The thioacetamide solution was thoroughly mixed by ultrasonic stirring for 30 minutes, then transferred to a hydrothermal kettle lined with p-polyphenylene (PPL), and heated to 1...

Embodiment 2

[0017] Example 2: Dissolve 0.005 mol of citric acid in 15 ml of absolute ethanol, quickly add 0.0045 mol of isopropyl titanate, stir for a while, start ultrasound (60 Hz), and add 20 mL of 0.2 mol·L titanate dropwise -1 Strontium nitrate solution and 25mL 1.8mol L -1 sodium hydroxide solution. After fully stirring and sonicating, the whole system was transferred to a hydrothermal kettle lined with polytetrafluoroethylene, heated to 200°C and maintained for 40h. After the reaction was completed, cool to room temperature, wash the product with deionized water, acetic acid and ethanol in sequence, and dry it in vacuum for 6 hours; weigh 0.6g of strontium titanate and dissolve it in 25ml of deionized water and 30ml of absolute ethanol, and pipette 1.6mL of 0.001mol ·L -1 Sodium molybdate solution and 2.5mL 0.01mol L -1 The thioacetamide solution was thoroughly mixed by ultrasonic stirring for 35 minutes, then transferred to a hydrothermal kettle lined with p-polyphenylene (PPL)...

Embodiment 3

[0018] Example 3: Dissolve 0.008 mol of citric acid in 20 ml of absolute ethanol, quickly add 0.006 mol of isopropyl titanate, stir for a while, start ultrasonic (60 Hz), and add 20 mL of 0.35 mol L dropwise -1 Strontium nitrate solution and 25mL 3mol L -1 sodium hydroxide solution. After fully stirring and ultrasonicating, the whole system was transferred to a hydrothermal kettle lined with polytetrafluoroethylene, heated to 190°C and maintained for 20 hours. After the reaction, cool to room temperature, wash the product with deionized water, acetic acid and ethanol in sequence, and dry in vacuum for 12 hours; weigh 0.55g of strontium titanate and dissolve it in 15ml of deionized water and 25ml of absolute ethanol, and pipette 3.1mL of 0.001mol · L -1 Sodium molybdate solution and 5.0mL 0.01mol L -1 The thioacetamide solution was thoroughly mixed by ultrasonic stirring for 30 minutes, then transferred to a hydrothermal kettle lined with p-polyphenylene (PPL), and heated to...

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PUM

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Abstract

The invention relates to preparation and application methods of a high-efficiency composite photocatalytic material MoS2/SrTiO3. The photocatalytic material is formed by compounding strontium titanate and molybdenum disulfide through a secondary hydrothermal method. The preparation method comprises the following steps: mixing isopropyl carbonate and citric acid, respectively dropwise adding a strontium nitrate solution and a sodium hydroxide solution under ultrasonic stirring conditions to obtain a precursor, heating the obtained precursor in a hydrothermal kettle, and washing and drying a product, thereby obtaining nano strontium titanate; fully mixing strontium titanate with a molybdenum disulfide precursor solution, heating in the hydrothermal kettle, and washing and drying a product, thereby obtaining the photocatalytic material MoS2/SrTiO3. The photocatalytic material is simple in preparation method, does not need high-temperature calcining, is low in cost and recyclable, is capable of efficiently degrading methyl orange or organic dyestuffs with similar developing groups with the methyl orange, and has wide application prospects in the field of treatment of wastewater containing the organic dyestuffs.

Description

technical field [0001] The invention relates to the preparation and application of a high-efficiency composite photocatalytic material, especially a kind of MoS for degrading organic dyes 2 / SrTiO 3 A preparation method of a high-efficiency composite photocatalytic material and its effective degradation of methyl orange dye or an organic dye having a similar chromogenic group to methyl orange under ultraviolet light conditions. Background technique [0002] In recent years, wastewater discharged from textile, paint, printing, daily necessities and other chemical factories has become one of the most concerned environmental problems. These wastewaters contain a large number of organic dye molecules, which not only pollute and destroy the ecological environment, but also contain toxic aromatic hydrocarbons. The product is carcinogenic to humans. The content of organic dyes in this kind of wastewater is high, and the molecular stability of synthetic organic dyes is strong. Tra...

Claims

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Application Information

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IPC IPC(8): B01J27/051C02F1/32C02F103/30
Inventor 周建成刘佳慧田庆文李乃旭王猛邓金全
Owner SOUTHEAST UNIV
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