A modified srtio 3 Photocatalyst and its preparation method

A photocatalyst and modification technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problem of poor pollutant enrichment ability and low photocatalytic activity , small specific surface area, etc., to achieve good visible light activity, simple preparation method, and easy-to-obtain raw materials

Active Publication Date: 2020-08-04
CHANGZHOU XINHONG PHARMA & CHEM IND TECHOLOGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SrTiO 3 Wide band gap (Eg=3.2eV), low utilization rate of visible light, and SrTiO 3 The small specific surface area and poor pollutant enrichment ability lead to low photocatalytic activity, which limit its practical application

Method used

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  • A modified srtio <sub>3</sub> Photocatalyst and its preparation method
  • A modified srtio <sub>3</sub> Photocatalyst and its preparation method
  • A modified srtio <sub>3</sub> Photocatalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A modified SrTiO 3 The preparation method of photocatalyst comprises the steps:

[0034] Step 1, 1.5g Sr(NO 3 ) 2 Added to 10mL of HNO with a concentration of 0.5mol / L 3 The solutions were mixed to prepare a mixed solution A; 10mL n-butyl titanate was added to 15mL ethylene glycol solution to prepare a mixed solution B; while stirring, the mixed solution A was slowly added to the mixed solution B to form a sol; The above-mentioned sol was moved into a reaction kettle, and reacted for 12 hours at 120°C, and the obtained product was washed and dried to obtain SrTiO 3 catalyst of light.

[0035] Step 2, the SrTiO that 2.5g step 1 makes 3 Add photocatalyst to 150mL ethylenediamine solution, add 1g dicyclohexylcarbodiimide at the same time, heat and reflux at 100°C for 24h, wash and dry the reacted product to obtain modified SrTiO 3 Photocatalyst, denoted as N-SrTiO 3 -NH 2 .

Embodiment 2

[0037] A modified SrTiO 3 The preparation method of photocatalyst comprises the steps:

[0038] Step 1, 2.0g Sr(NO 3 ) 2 Added to 12mL of HNO with a concentration of 0.5mol / L 3 The solutions were mixed to prepare a mixed solution A; 12mL n-butyl titanate was added to 15mL ethylene glycol solution to prepare a mixed solution B; while stirring, the mixed solution A was slowly added to the mixed solution B to form a sol; The above sol was moved into the reaction kettle, and reacted for 24 hours at 140°C, and the obtained product was washed and dried to obtain SrTiO 3 catalyst of light.

[0039] Step 2, the SrTiO that 2.5g step 1 makes 3 Add photocatalyst to 150mL ethylenediamine solution, add 1.2g dicyclohexylcarbodiimide at the same time, heat and reflux at 110°C for 24h, wash and dry the reacted product to obtain modified SrTiO 3 Photocatalyst, denoted as N-SrTiO 3-NH 2 .

Embodiment 3

[0041] A modified SrTiO 3 The preparation method of photocatalyst comprises the steps:

[0042] Step 1, 2.0g Sr(NO 3 ) 2 Added to 15mL of HNO with a concentration of 1.0mol / L 3 The solutions were mixed to prepare a mixed solution A; 12mL n-butyl titanate was added to 20mL ethylene glycol solution to prepare a mixed solution B; while stirring, the mixed solution A was slowly added to the mixed solution B to form a sol; The above sol was moved into the reaction kettle, and reacted for 24 hours at 160°C, and the obtained product was washed and dried to obtain SrTiO 3 catalyst of light.

[0043] Step 2, the SrTiO that 2.5g step 1 makes 3 Add photocatalyst to 200mL ethylenediamine solution, add 1.5g dicyclohexylcarbodiimide at the same time, heat and reflux at 115°C for 48h, wash and dry the reacted product to obtain modified SrTiO 3 Photocatalyst, denoted as N-SrTiO 3 -NH 2 .

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Abstract

The invention discloses a modified SrTiO3 photocatalyst and a preparation method thereof, and also discloses a preparation method of the modified SrTiO3 photocatalyst. SrTiO3 is modified by ethanediamine, so intracell N doping of the SrTiO3 and surface functional group grafting are realized synchronously. The modified SrTiO3 has high visible light activity and has high ability of enriching Cr (VI)in water, so the modified SrTiO3 has a good treatment effect on the high-concentration Cr(VI) polluted water under the condition of visible light; in addition, the preparation method has the following advantages: the raw materials are easily available, the cost is low, the reaction condition is mild and environmental pollution is avoided.

Description

technical field [0001] The invention relates to the field of semiconductor photocatalysts, in particular to a modified SrTiO 3 The photocatalyst also relates to a preparation method of the photocatalyst. Background technique [0002] Energy shortage and environmental pollution are two great challenges facing human society today. In terms of environment, due to human activities, a large amount of pollutants enter the water environment, which not only leads to resource loss, but also has a major impact on ecological balance and human health. In recent years, photocatalytic water treatment technology has attracted widespread attention as a new type of green technology. [0003] Strontium titanate (SrTiO 3 ) is a typical perovskite-type photocatalytic material, and its photocatalytic removal of water pollutants is a potential wastewater terminal treatment technology. However, SrTiO 3 Wide band gap (Eg=3.2eV), low utilization rate of visible light, and SrTiO 3 The small spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01J35/10C02F1/30C02F101/22
CPCB01J31/0272B01J35/004B01J35/10C02F1/30C02F2101/22C02F2305/10
Inventor 傅小飞高永
Owner CHANGZHOU XINHONG PHARMA & CHEM IND TECHOLOGIES
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