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Preparation method of visible light catalyst

A photocatalyst and visible light technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor catalytic effect of visible light photocatalysts, achieve good photocatalytic effect, simple operation, The reaction process is mild and controllable

Inactive Publication Date: 2018-03-23
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the existing technical problems, the present invention provides a method for preparing a visible light photocatalyst. The method for preparing the visible light photocatalyst should solve the problem that the visible light photocatalyst prepared in the prior art has poor catalytic effect. technical issues

Method used

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  • Preparation method of visible light catalyst
  • Preparation method of visible light catalyst
  • Preparation method of visible light catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) According to tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ): Ethanol: N 2 h 4 ·H 2 O: AgNO 3 The molar ratio is 1:25:5:0.1 and the samples are weighed respectively;

[0018] 2) Ti(OC 4 h 9 ) 4 After dispersing in ethanol, add N 2 h 4 ·H 2 O, sonicated for 0.5h in an ice-water bath to form TiO 2 The precursor sol is transferred to a hydrothermal kettle;

[0019] 3) Add AgNO to the hydrothermal kettle under ultrasonic state 3 , at 160 ° C, after 6 h of reaction, anatase TiO 2 / Ag visible light photocatalyst.

[0020] Utilize Japan Hitachi S-4800II to carry out SEM test to the obtained sample, the result is as follows figure 1 As shown, the obtained samples have uniform particle size and no agglomeration.

[0021] Utilize German Bruker D8Advance to carry out XRD spectrogram test to the obtained sample, the result is as follows Figure 4 As shown, the XRD spectrum of the obtained sample also appeared TiO 2 and the characteristic peaks of Ag element, indicating...

Embodiment 2

[0024] 1) According to tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ): Ethanol: N 2 h 4 ·H 2 O: AgNO 3 The molar ratio is 1:30:7.5:0.15 and the samples are weighed respectively;

[0025] 2) Ti(OC 4 h 9 ) 4 After dispersing in ethanol, add N 2 h 4 ·H 2O, sonicated for 1 h in an ice-water bath to form TiO 2 The precursor sol is transferred to a hydrothermal kettle;

[0026] 3) Add AgNO to the hydrothermal kettle under ultrasonic state 3 , at 180 ° C, after 8 hours of reaction, anatase TiO 2 / Ag visible light photocatalyst.

[0027] Utilize Japan Hitachi S-4800II to carry out SEM test to the obtained sample, the result is as follows figure 2 As shown, the obtained samples have uniform particle size and no agglomeration.

[0028] Utilize German Bruker D8Advance to carry out XRD spectrogram test to the obtained sample, the result is as follows Figure 4 As shown, the XRD spectrum of the obtained sample also appeared TiO 2 and the characteristic peaks of Ag element, indi...

Embodiment 3

[0031] 1) According to tetrabutyl titanate (Ti(OC 4 h 9 ) 4 ): Ethanol: N 2 h 4 ·H 2 O: AgNO 3 The molar ratio is 1:35:10:0.2 and the samples are weighed respectively;

[0032] 2) Ti(OC 4 h 9 ) 4 After dispersing in ethanol, add N 2 h 4 ·H 2 O, sonicated for 1.5h in an ice-water bath to form TiO 2 The precursor sol is transferred to a hydrothermal kettle;

[0033] 3) Add AgNO to the hydrothermal kettle under ultrasonic state 3 , at 200°C, after 10h reaction, anatase TiO 2 / Ag visible light photocatalyst.

[0034] Utilize Japan Hitachi S-4800II to carry out SEM test to the obtained sample, the result is as follows image 3 As shown, the obtained samples have uniform particle size and no agglomeration.

[0035] Utilize German Bruker D8Advance to carry out XRD spectrogram test to the obtained sample, the result is as follows Figure 4 As shown, the XRD spectrum of the obtained sample also appeared TiO 2 and the characteristic peaks of Ag element, indicating tha...

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Abstract

The invention provides a preparation method of a visible light catalyst. The preparation method comprises the following steps: weighing tetrabutyl titanate, ethanol, hydrazine hydrate and AgNO3, dispersing the tetrabutyl titanate in the ethanol, adding N2H4.H2O, ultrasonically dispersing in icy water bath for 0.5 to 1.5 h, forming TiO2 precursor sol, transferring the TiO2 precursor sol into a hydrothermal kettle, adding AgNO3 into the hydrothermal kettle at an ultrasonic state, reacting for 6 to 10 h at 160 to 200 DEG C, and obtaining the anatase TiO2 / Ag visible light catalyst. Oxygen vacancyformed inside the TiO2 prepared by virtue of the reduction of N2H4.H2O is synergistic with Ag, so that the absorption spectral range of a sample is enlarged, the propagation rate and separation efficiency of photon-generated carrier can be improved, and the visible light catalytic efficiency can be increased. The oxygen vacancy is separately formed inside TiO2 and nano silver corresponding to thevisible light is carried on the surface of TiO2 by virtue of in-situ reduction reaction, and the preparation method is simple and easy to control.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials and relates to a catalyst, specifically an anatase TiO 2 / Ag preparation method of visible light photocatalyst. Background technique [0002] With the intensification of industrialization, industrial pollutants emitted by some industries are increasingly threatening human health. Among them, water pollution caused by organic dyes discharged by the textile printing and dyeing industry has become a serious environmental problem. To solve this problem, scientists are constantly looking for new ways to remove organic pollutants in water bodies. Among them, TiO 2 The photocatalytic technology represented by it has become one of the environmental research hotspots in the past two decades. It has the characteristics of low energy consumption, low price, non-toxicity and no secondary pollutants, and has broad application prospects in industrial wastewater treatment. [0003] However, TiO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J37/16C02F1/30C02F103/30
CPCC02F1/30B01J23/50B01J37/16C02F2101/308C02F2103/30C02F2305/10B01J35/39
Inventor 张娜张小磊甘传先万通陈琪房永征刘玉峰
Owner SHANGHAI INST OF TECH
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