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the b 4 in 2 o 7 The hydrothermal preparation method and its application

A ba4in2o7, 1.ba4in2o7 technology, applied in the field of material preparation, can solve the problems of catalyst particles not being fine enough, high energy consumption, etc., achieve good photocatalytic performance, broaden the application field, and enrich the effect of types

Inactive Publication Date: 2016-08-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide Ba 4 In 2 o 7 The hydrothermal preparation method solves the problem of high-temperature solid-phase synthesis of Ba in the prior art 4 In 2 o 7 Existing technical problems of large energy consumption and insufficient fineness of prepared catalyst particles

Method used

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  • the b <sub>4</sub> in <sub>2</sub> o <sub>7</sub> The hydrothermal preparation method and its application
  • the b <sub>4</sub> in <sub>2</sub> o <sub>7</sub> The hydrothermal preparation method and its application

Examples

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Effect test

Embodiment 1

[0034] Dissolve 5.6g of NaOH in deionized water to prepare an aqueous solution of NaOH with a mass fraction of 22%; add 0.33g of In(OH) to the aqueous solution of NaOH 3 Solid, magnetically stirred for 30 min to prepare suspension a; 1.044g of Ba(NO 3 ) 2 Dissolve in water, mix into 0.2mol / L Ba(NO 3 ) 2 The solution, under magnetic stirring at a speed of 1500r / min, add the above Ba(NO 3 ) 2 Put the solution in suspension a. After the dripping is completed, magnetically stir for 30 min to prepare suspension b; transfer suspension b to a reactor lined with polytetrafluoroethylene, and then place the reactor at a constant temperature of 200°C React in a drying box for 17 hours, and cool to room temperature naturally to obtain a milky white precipitate c; take out the milky white precipitate c, rinse with deionized water and absolute ethanol for 3 times and filter, and place the filtered solid substance in a constant temperature drying box at 80°C Dry for 2h to get Ba 3 In 2 (OH) 12 ...

Embodiment 2

[0036] Dissolve 7.5g of NaOH in deionized water to prepare an aqueous solution of NaOH with a mass fraction of 24%; add 0.44g of In(OH) to the aqueous solution of NaOH 3 Solid, magnetic stirring for 60min, to prepare suspension a; 1.399g of Ba(NO 3 ) 2 Dissolved in water and formulated with a concentration of 0.3mol / L Ba(NO 3 ) 2 The solution, under magnetic stirring at a speed of 1700r / min, add the above Ba(NO 3 ) 2 Put the solution in suspension a. After the dripping is completed, magnetically stir for 45 minutes to prepare suspension b; transfer suspension b to a reactor lined with polytetrafluoroethylene, and then place the reactor at a constant temperature of 210°C React in a drying box for 8 hours, and cool to room temperature naturally to obtain a milky white precipitate c; take out the milky white precipitate c, rinse with deionized water and absolute ethanol for 4 times, and filter, and place the filtered solid matter in a constant temperature drying box at 80°C Dry for ...

Embodiment 3

[0038] Dissolve 15g of NaOH in deionized water to prepare an aqueous solution of NaOH with a mass fraction of 27%; add 0.884g of In(OH) to the aqueous solution of NaOH 3 Solid, magnetic stirring for 45min, to prepare suspension a; 2.796g of Ba(NO 3 ) 2 Dissolved in water, formulated into Ba(NO) with a concentration of 0.4mol / L 3 ) 2 The solution, under magnetic stirring at a speed of 2000r / min, add the above Ba(NO 3 ) 2 Put the solution in suspension a. After the dripping is completed, magnetically stir for 60 min to prepare suspension b; transfer suspension b to a reactor lined with polytetrafluoroethylene, and then place the reactor at 220°C constant temperature React in a drying box for 5 hours, and cool to room temperature naturally to obtain a milky white precipitate c; take out the milky white precipitate c, rinse with deionized water and absolute ethanol for 5 times, and then filter, and place the filtered solid matter in a constant temperature drying box at 80°C After dry...

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Abstract

The invention discloses a hydrothermal preparation method of Ba4In2O7 and its application. In(OH)3 and Ba(NO3)2 are used as main synthetic raw materials, and the molar ratio of In(OH)3 and Ba(NO3)2 is controlled to be 2:1. , using water as the reaction medium to obtain Ba3In2(OH)12, and then bake Ba3In2(OH)12 at high temperature to obtain Ba4In2O7. The Ba4In2O7 is prepared by a hydrothermal method, which is easy to operate, easy to control and does not contain poisonous and harmful substances to the human body or the environment. The present invention uses Ba4In2O7 alone as a catalyst for photocatalytic degradation of environmental pollutants for the first time, has good photocatalytic performance, broadens the application field of Ba4In2O7, and enriches the types of catalysts for catalytic degradation of environmental pollutants.

Description

Technical field [0001] The invention belongs to the technical field of material preparation, and specifically relates to Ba 4 In 2 O 7 The hydrothermal preparation method also involves Ba 4 In 2 O 7 Applications. Background technique: [0002] Indium is a kind of scattered metal with good light permeability and conductivity. As a functional material, in addition to being widely used in liquid crystal displays and flat screens, it is also an important additive element for lead-free solder. However, recent studies have found that indium oxides and their composites with other metals also have excellent photocatalytic activity. In 1989, Lalla and Müller-Buschbaum prepared the tetragonal compound Ba by the high temperature solid phase method for the first time 4 In 2 O 7 However, the high-temperature solid-phase method has problems such as high energy consumption and insufficient fineness of the prepared catalyst particles. Summary of the invention: [0003] The purpose of the present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/825C01G15/00B01J23/08A62D3/17A62D101/26A62D101/28
Inventor 姚秉华张钦库鲁盼庞波熊敏
Owner XIAN UNIV OF TECH