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Defect type perovskite photocatalytic material as well as preparation method and application thereof

A photocatalytic material and defect-type technology, which is applied in the field of photocatalytic materials, can solve the problems of high cost, many steps in the preparation method, and the inability to prepare photocatalytic materials, and achieve the effects of high cost, high catalytic activity, and simple preparation methods

Active Publication Date: 2019-01-01
SHANGHAI TOBACCO GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the raw materials used in some methods of synthesizing self-doping defect-type materials are organometallic salts (chemical communications, 2013, 49, 7830-7832), which have high requirements on the conditions of the reaction system and need to control hydrolysis and react under an inert atmosphere. The preparation method There are many steps, the reagents used are expensive, and the method of directly and simply synthesizing self-doping defect-type photocatalytic materials using common reaction materials is rare
Patent CN102553564 discloses a preparation method of a photocatalytic material, the raw material of which is Ta 2 o 5 , NaOH, NH 4 F, hydrazine hydrate and water are prepared by hydrothermal method, but the above method cannot prepare defective photocatalytic materials, and the catalytic effect of catalytic materials is poor

Method used

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  • Defect type perovskite photocatalytic material as well as preparation method and application thereof
  • Defect type perovskite photocatalytic material as well as preparation method and application thereof
  • Defect type perovskite photocatalytic material as well as preparation method and application thereof

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Embodiment 1

[0029] This embodiment relates to a method for preparing a defect-type perovskite photocatalytic material, comprising the following steps:

[0030] 0.884g Ta 2 o 5 and 1.8g NaF were added to a 100ml hydrothermal reaction kettle, then 1g KOH was added, and finally 70ml NH 3 ·H 2 O, after stirring for 30 minutes, seal the reaction kettle, place it in a blast oven, and react at 270°C for 12 hours. After the reaction system was cooled to room temperature, it was allowed to stand until it was precipitated and separated, centrifuged, and washed with deionized water to neutrality. The product was dried in a blast oven at 80°C for 24 hours to obtain a gray-blue powder defect NaTaO 3 photocatalytic material.

Embodiment 2

[0032] 8.84g Ta 2 o 5 and 5.4g NaF were added to a 100ml hydrothermal reaction kettle, then 1g KOH was added, and finally 70ml NH 3 ·H 2 O, after stirring for 30 minutes, seal the reaction vessel, place it in a blast oven, and react for 24 hours at 270°C. After the reaction system was cooled to room temperature, it was allowed to stand until it was precipitated and separated, centrifuged, and washed with deionized water to neutrality. The product was dried in a blast oven at 80°C for 24 hours to obtain a gray-blue powder defect NaTaO 3 photocatalytic material.

Embodiment 3

[0034] 1.140g Ta(OH) 5 and 1.8g NaF were added to a 100ml hydrothermal reaction kettle, then 1g KOH was added, and finally 70ml NH 3 ·H 2 O, after stirring for 30 minutes, seal the reaction kettle, place it in a blast oven, and react for 24 hours at 220°C. After the reaction system was cooled to room temperature, it was allowed to stand until it was precipitated and separated, centrifuged, and washed with deionized water to neutrality. The product was dried in a blast oven at 80°C for 24 hours to obtain a gray-blue powder defect NaTaO 3 photocatalytic material.

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Abstract

The invention relates to a defect type perovskite photocatalytic material preparation method. Tantalum oxide or tantalum hydroxide is utilized as a precursor, and a perovskite photocatalytic materialcan be prepared by hydrothermal reaction of sodium fluoride and potassium hydroxide in ammonium hydroxide. By means of the preparation method disclosed by the invention, a dusty-blue solid powder defect type tantalate photocatalytic material can be prepared. A reaction oxygen species of the defect type photocatalytic material in a process of photocatalytically oxidizing and degrading pollutants issuperoxide radical, so that catalytic activity is higher; furthermore, the defect type photocatalytic material has catalyzing effect on varieties pollutants of cancerogen, other pollution sources andthe like in environment and has potential application value in the fields of energy, environment and the like.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a defect-type perovskite photocatalytic material and a preparation method thereof. Background technique [0002] Environmental pollution and energy shortage have become two major problems hindering human development. Since the use of fossil energy may cause many direct or indirect environmental pollution, the search for renewable energy and the effective control of environmental pollution have become urgent problems to be solved. Many new studies and new achievements have been tried to be applied to the development of new energy sources and the control of environmental pollution. Photocatalytic technology has become a recognized and ideal cleaning method because it can directly use solar energy and be used for environmental pollution control. One of the important technologies for energy production and pollution control. In the two main research directions of ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20C02F1/30C02F1/72C02F101/38C02F101/36C02F101/34
CPCC02F1/30C02F1/725B01J23/20C02F2101/36C02F2101/345C02F2101/38B01J35/39
Inventor 徐同广周骏白若石蒋成勇郑晓曼马雁军芦楠杨振东
Owner SHANGHAI TOBACCO GRP CO LTD
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