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Silver oxide/barium titanate ultrasonic photo-catalyst and preparation method thereof

A photocatalyst, barium titanate technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., to promote photocatalytic reaction activity, improve photocatalytic activity, effect of promoting separation

Active Publication Date: 2014-08-13
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, for Ag 2 O and BaTiO 3 The heterostructure formed by the composite of nanocubes, and the use of silver oxide / barium titanate (Ag 2 OBaTiO 3 ) nanocube heterostructures as photocatalysts and their application in acousto-optic synergistic catalytic degradation of pollutants have not been reported yet

Method used

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  • Silver oxide/barium titanate ultrasonic photo-catalyst and preparation method thereof
  • Silver oxide/barium titanate ultrasonic photo-catalyst and preparation method thereof
  • Silver oxide/barium titanate ultrasonic photo-catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] ① Mix 20g of anhydrous hydroxide (NaOH / KOH=51.5:48.5), 0.6mmol BaCl 2 , 0.5 mmol nano-TiO 2 Add to the hydrothermal reaction kettle in turn, the filling degree is controlled at 20-30% of the reaction kettle volume, and stir evenly; then seal the hydrothermal reaction kettle, put it into the drying box, and control the hydrothermal temperature at 200°C, The reaction time was controlled at 48h. After the reaction was completed, it was naturally cooled to room temperature, and the obtained product was repeatedly washed with deionized water to neutrality, then suction filtered, and dried to obtain BaTiO 3 powder;

[0022] ② Weigh the BaTiO obtained in step ① 3 Powder 100mg, and dispersed in 100mL of water, ultrasonic stirring for 30min, the concentration of 1g / L of BaTiO 3 Suspension, the resulting solution is marked as A;

[0023] ③BaTiO by mass ratio 3 :Ag 2 The ratio of O=1:5, add the corresponding reaction amount of AgNO to the A solution under the condition of ul...

Embodiment 2

[0029] ① Mix 20g of anhydrous hydroxide (NaOH / KOH=51.5:48.5), 0.6mmol BaCl 2 , 0.5 mmol nano-TiO 2 Add to the hydrothermal reaction kettle one by one, stir evenly, and the filling degree is controlled at 20-30% of the reaction kettle volume; then seal the hydrothermal reaction kettle, put it into the drying box, control the hydrothermal temperature at 200°C, and react The time is controlled at 72h. After the reaction is completed, it is naturally cooled to room temperature, and the obtained product is repeatedly washed with deionized water until it is neutral, then suction filtered, and dried to obtain BaTiO 3 powder, ready to use;

[0030] ② Disperse 100mg of barium titanate powder obtained in step ① in 100mL of water, and ultrasonicate for 30min to obtain BaTiO 3 For suspensions with a concentration of 1g / L, the resulting solution is denoted as A;

[0031] ③ Add BaTiO to A solution by mass ratio 3 :Ag 2 The ratio of O=1:1 was added to the corresponding reaction amount o...

Embodiment 3

[0034] ① Mix 20g of anhydrous hydroxide (NaOH / KOH=51.5:48.5), 0.6mmol BaCl 2 , 0.5 mmol nano-TiO 2 Add to the hydrothermal reaction kettle one by one, stir evenly, and the filling degree is controlled at 20-30% of the reaction kettle volume; then seal the hydrothermal reaction kettle, put it into the drying box, control the hydrothermal temperature at 200°C, and react The time was controlled at 48h, and after the reaction was completed, it was naturally cooled to room temperature, and the obtained product was repeatedly washed with deionized water to neutrality, then suction filtered, and dried to obtain BaTiO 3 powder, ready to use;

[0035] ② Disperse 100mg of barium titanate powder obtained in step ① in 100mL of water, and ultrasonicate for 30min to obtain BaTiO 3 For suspensions with a concentration of 1g / L, the resulting solution is denoted as A;

[0036] ③ Add BaTiO to A solution by mass ratio 3 :Ag 2 The ratio of O=3:2 was added to the corresponding reaction amount...

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Abstract

The invention discloses a silver oxide / barium titanate nano cube block hetero-structure ultrasonic photo-catalyst which consists of BaTiO3 nano cube blocks with the side length sizes of 60nm-90nm and Ag2O nanoparticles with the diameters being 1-10nm, wherein the Ag2O nanoparticles are loaded on the surfaces of the nano cube blocks; a mass ratio of BaTiO3 to Ag2O is (5:1)-(1:5). The ultrasonic photo-catalyst is prepared by the following steps: synthesizing the BaTiO3 nano cube blocks by adopting a hot alkali method, then loading Ag2O nanoparticles on the BaTiO3 nano cube blocks by using a simple chemical precipitation method. The catalyst integrates properties of excellent visible light catalysts Ag2O and BaTiO3; on one hand, current carriers are facilitated under the ultrasonic action, and additionally generated current carriers can accelerate the photo-catalytic reaction activity of the silver oxide; meanwhile, a synthetic process and device are simple, the cost is low, the efficiency is high, the reaction period is shortened, the repeatability is excellent and the industrialized application prospect is wide.

Description

technical field [0001] The invention relates to an ultrasonic photocatalyst and a preparation method thereof, in particular to a silver oxide / barium titanate (Ag 2 OBaTiO 3 ) nano cube heterostructure ultrasonic photocatalyst and its preparation method; it belongs to the field of photocatalytic materials and its preparation. Background technique [0002] Photocatalysis is a photochemical reaction in the presence of a catalyst, which is an organic combination of photochemistry and catalyst. Photocatalytic degradation of organic pollutants is an energy-saving, high-efficiency, green and environmentally friendly new technology developed in recent years. However, its development as a new functional material also faces many limitations, such as low catalytic efficiency, catalyst deactivation, secondary pollution, and low utilization of sunlight. Based on this, the development and construction of heterostructures has become an important means to obtain new high-performance phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66B82Y30/00B82Y40/00
Inventor 刘宏李海东梁龙跃桑元华常苏捷
Owner SHANDONG UNIV
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