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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 SrTiO 3 Photocatalyst and preparation method thereof, the modified SrTiO is also disclosed 3 Preparation method of photocatalyst, the present invention uses ethylenediamine to react SrTiO 3 Modification was carried out and SrTiO was realized simultaneously 3 N doping in the crystal lattice and surface functional group grafting, the modified SrTiO of the present invention 3 It has good visible light activity and has strong enrichment ability for Cr(VI) in water. Therefore, the modified SrTiO in the present invention 3 It also has a good treatment effect on high-concentration Cr(VI) contaminated water under visible light conditions. In addition, the preparation method of the present invention has easy-to-obtain raw materials, low cost, mild reaction conditions and no pollution to the environment.

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
CPCC02F1/30B01J31/0272C02F2101/22C02F2305/10B01J35/60B01J35/39
Inventor 傅小飞高永
Owner CHANGZHOU XINHONG PHARMA & CHEM IND TECHOLOGIES
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