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Strontium tantalate nanosphere photocatalyst, as well as preparation method and application thereof

A technology of photocatalysts and nanospheres, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of low degradation efficiency, low activity, and high energy consumption of benzene series pollutants, and achieve high practicality Value and application prospect, high-efficiency degradation, and low energy consumption

Inactive Publication Date: 2013-07-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a strontium tantalate nanosphere photocatalyst and its preparation method and application, to solve the problems of high temperature conditions, high energy consumption, low activity, etc. TiO in technology 2 and other traditional photocatalysts have problems such as low degradation efficiency and easy deactivation of benzene series pollutants

Method used

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  • Strontium tantalate nanosphere photocatalyst, as well as preparation method and application thereof
  • Strontium tantalate nanosphere photocatalyst, as well as preparation method and application thereof
  • Strontium tantalate nanosphere photocatalyst, as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The first is the preparation of the precursor, weighing 2 g of commercial Ta 2 o 5 dissolved in 30 mL of NH 4 HF 2 In solution, Ta 2 o 5 with NH 4 HF 2 The mass ratio of tantalic acid is 1:2, add ammonia water with a mass fraction of 25% under rapid stirring, adjust the pH value of the solution to not less than 9, until the white tantalic acid precursor precipitates, filter and set aside; in the polytetrafluoroethylene reactor Add 1 g tantalate precursor, Sr(NO 3 ) 2 (The molar ratio of Ta to Sr is 1:1) and 1 g of PVP, then add 70 mL of deionized water and stir rapidly, adjust the pH value to 10 with 4mol / L NaOH solution, and then react hydrothermally at 160°C for 48 h; After natural cooling, washing with ethanol and water, centrifugation, and drying, it becomes the strontium tantalate nanosphere photocatalyst.

Embodiment 2

[0024] The first is the preparation of the precursor, weighing 2 g of commercial Ta 2 o 5 dissolved in 30 mL of NH 4 HF 2 In solution, Ta 2 o 5 with NH 4 HF 2 The mass ratio of tantalic acid is 1:2, add ammonia water with a mass fraction of 25% under rapid stirring, adjust the pH value of the solution to not less than 9, until the white tantalic acid precursor precipitates, filter and set aside; in the polytetrafluoroethylene reactor Add 1 g tantalate precursor, Sr(NO 3 ) 2(The molar ratio of Ta to Sr is 1:1) and 0.5 g of PVP, then add 70 mL of deionized water and stir rapidly, adjust the pH value to 10 with 4 mol / L NaOH solution, and then hydrothermally react at 180 °C for 36 h; After natural cooling, washing with ethanol and water, centrifugation, and drying, it becomes the strontium tantalate nanosphere photocatalyst.

Embodiment 3

[0026] The first is the preparation of the precursor, weighing 2 g of commercial Ta 2 o 5 dissolved in 30 mL of NH 4 HF 2 In solution, Ta 2 o 5 with NH 4 HF 2 The mass ratio of tantalic acid is 1:2, add ammonia water with a mass fraction of 25% under rapid stirring, adjust the pH value of the solution to not less than 9, until the white tantalic acid precursor precipitates, filter and set aside; in the polytetrafluoroethylene reactor Add 1 g tantalate precursor, Sr(NO 3 ) 2 (The molar ratio of Ta to Sr is 1:1) and 1.5 g of PVP, then add 70 mL of deionized water and stir rapidly, adjust the pH value to 10 with 4mol / L NaOH solution, and then hydrothermally react at 160°C for 36 h; After natural cooling, washing with ethanol and water, centrifugation, and drying, it becomes the strontium tantalate nanosphere photocatalyst.

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Abstract

The invention discloses strontium tantalate nanosphere photocatalyst, as well as a preparation method and application thereof, and belongs to the technical field of material preparation and environmental pollution improvement. Aiming at the problems of being lower in activity, poor in stability and difficult for regeneration in treatment of benzene pollutants by utilizing photocatalysis currently, the strontium tantalate nanosphere photocatalyst having high performance is developed to replace commodity TiO2. The preparation method disclosed by the invention comprises the following two steps of: step 1, dissolving, precipitating synthesize a tantalic acid precursor; and step 2, synthesizing strontium tantalate nanosphere by using a surface active agent assisted with a hydrothermal method. The photocatalyst prepared by the invention has high specific surface area, is capable of efficiently degrading organic / heavy metal pollutants in waste water and waste gas, and particularly has good effect for benzene organic pollutants difficult to degrade. The preparation method disclosed by the invention is simple in process, low in cost and high in yield. The catalyst is strong in poison resistance, corresponds with practical production requirements, and has great application potential.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental pollution control, and specifically relates to a strontium tantalate nanosphere photocatalyst and its preparation method and application. Background technique [0002] In recent years, with the development of the economy and the improvement of people's living standards, new building materials, especially chemically synthesized building materials, have been widely used, and high-end furniture and household appliances have entered homes and offices one after another. Chemicals, insecticides and detergents have also become indispensable articles in people's lives. The use of new materials has led to the continuous increase of harmful substances in indoor air no matter from the type or quantity, resulting in serious indoor air pollution. Most of the air that people breathe comes from indoors, and the quality of indoor air directly affects people's health. According to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20B01D53/86B01D53/44C02F1/30C02F101/20C02F101/30
CPCY02W10/37
Inventor 梁诗景祝淑颖吴棱
Owner FUZHOU UNIV
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