RGO/TiO2/Ag aerogel-type photocatalyst and preparation method and application thereof

A photocatalyst, aerogel technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc.

Active Publication Date: 2019-08-20
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And about RGO/TiO 2 /Ag-type airgel photo

Method used

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  • RGO/TiO2/Ag aerogel-type photocatalyst and preparation method and application thereof
  • RGO/TiO2/Ag aerogel-type photocatalyst and preparation method and application thereof
  • RGO/TiO2/Ag aerogel-type photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: 1%-RGO / TiO 2 The preparation method of / Ag airgel type photocatalyst, step is as follows:

[0048] 1) 1%-RGO / TiO 2 Preparation: Mix graphene oxide and butyl titanate in absolute ethanol at a mass ratio of 0.02:9, stir in a constant temperature water bath at 35°C until uniformly mixed to obtain a mixed solution; mix hydrochloric acid, absolute ethanol and deionized water by volume The ratio of 1.8:50:12 was mixed to make a titration solution; using the sol-gel method, the titration solution was added to the mixture until a gel was formed; the gel was first aged for 6 hours, then dried at 60°C and ground into powder, and then in Heat treatment in a tube furnace at 400 °C for 3 h under nitrogen atmosphere to obtain RGO / TiO 2 catalyst of light;

[0049] 2) 1%-RGO / TiO 2 Preparation of / Ag photocatalyst powder: under absolute ethanol system, the RGO / TiO obtained in step 1) 2 Photocatalyst and silver nitrate are mixed at a mass ratio of 1:0.03, RGO / TiO 2 The mas...

Embodiment 2

[0051] Example 2: 5%-RGO / TiO 2 The preparation method of / Ag airgel type photocatalyst, step is as follows:

[0052] 1) 5%-RGO / TiO 2 Preparation: Mix graphene oxide and butyl titanate in absolute ethanol at a mass ratio of 0.1:9, stir in a constant temperature water bath at 35°C until uniformly mixed to obtain a mixed solution; mix hydrochloric acid, absolute ethanol and deionized water by volume The ratio of 1.8:50:12 was mixed to make a titration solution; using the sol-gel method, the titration solution was added to the mixture until a gel was formed; the gel was first aged for 6 hours, then dried at 60°C and ground into powder, and then in Heat treatment in a tube furnace at 400 °C for 3 h under nitrogen atmosphere to obtain RGO / TiO 2 catalyst of light;

[0053] 2) 5%-RGO / TiO 2 Preparation of / Ag photocatalyst powder: under absolute ethanol system, the RGO / TiO obtained in step 1) 2 Photocatalyst and silver nitrate are mixed at a mass ratio of 1:0.03, RGO / TiO 2 The mass...

Embodiment 3

[0055] Example 3: 10%-RGO / TiO 2 The preparation method of / Ag airgel type photocatalyst, step is as follows:

[0056] 1) 10%-RGO / TiO 2 Preparation: Mix graphene oxide and butyl titanate in absolute ethanol at a mass ratio of 0.2:9, stir in a constant temperature water bath at 35°C until evenly mixed to obtain a mixed solution; mix hydrochloric acid, absolute ethanol and deionized water by volume The ratio of 1.8:50:12 was mixed to make a titration solution; using the sol-gel method, the titration solution was added to the mixture until a gel was formed; the gel was first aged for 6 hours, then dried at 60°C and ground into powder, and then in Heat treatment in a tube furnace at 400 °C for 3 h under nitrogen atmosphere to obtain RGO / TiO 2 catalyst of light;

[0057] 2) 10%-RGO / TiO 2 / Ag photocatalyst powder preparation: under absolute ethanol system, the RGO / TiO obtained in step 1) 2 Photocatalyst and silver nitrate are mixed at a mass ratio of 1:0.03, RGO / TiO 2 The mass v...

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Abstract

The invention discloses a RGO/TiO2/Ag aerogel-type photocatalyst and a preparation method and application thereof. The preparation method comprises the steps: using graphene oxide, butyl titanate andsilver nitrate as raw materials, and adopting a thermal reduction method, an ultraviolet light illumination reduction method and a freeze drying sequentially. The catalyst has an aerogel structure, alarge specific surface area, high adsorption capacity, a high constitutive property and easy recovery.

Description

technical field [0001] The present invention relates to a preparation method and application of a photocatalyst, especially a kind of RGO / TiO 2 / Ag airgel-type photocatalyst preparation method and application. Background technique [0002] With the development of industry, the content of formaldehyde in air and waste water is increasing day by day. Since formaldehyde exists widely and still has high carcinogenicity and teratogenicity at low levels, the efficient removal of formaldehyde is of great significance. Compared with some other treatment measures, photocatalytic degradation technology is becoming more and more mature, and gradually attracts people's attention. The use of photodegradation technology to solve environmental pollution problems has become one of the important measures for environmental governance. [0003] Titanium dioxide has become the most widely used photocatalyst material due to its excellent photocatalytic performance, excellent chemical stabilit...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J35/10B01D53/86B01D53/72
CPCB01J35/004B01J35/0013B01J23/50B01J35/1014B01D53/8668
Inventor 王冠琦王海旺张煜垲马源吴正杰蒲泓沁李元铭高德宽刘可凡张柯沈嘉豪冀成魏新芳王柄筑
Owner 东北大学秦皇岛分校
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