Method for preparing Fe/N co-doped-TNTs (TiO2 nano-tubes)-reduced graphene oxide composite catalysts

A graphene composite and composite catalyst technology, applied in the field of photocatalytic degradation of organic pollutants, can solve problems such as light propagation without consideration, achieve the goal of improving free carrier density, improving photocatalytic degradation ability, and reducing catalytic degradation cost Effect

Inactive Publication Date: 2017-08-11
张家港绿潮水环保科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

3D TiO 2 The stability of the composite has also received a lot of attention. Unfortunately, the propagation of light in solution is not taken into account and oxygen is always provided by additional equipment

Method used

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  • Method for preparing Fe/N co-doped-TNTs (TiO2 nano-tubes)-reduced graphene oxide composite catalysts
  • Method for preparing Fe/N co-doped-TNTs (TiO2 nano-tubes)-reduced graphene oxide composite catalysts
  • Method for preparing Fe/N co-doped-TNTs (TiO2 nano-tubes)-reduced graphene oxide composite catalysts

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Embodiment 1

[0041] The specific preparation method of the present embodiment Fe / N co-doped-TNTs-graphene oxide composite catalyst is as follows:

[0042] 1. Preparation of graphene oxide GO: add 3.75g NaNO to a beaker 3 , 5g graphite, 150mL concentrated H 2 SO 4 , 20gKMnO 4 , H 2 o 2 (30 mL, 30%) was vigorously stirred; after the chemical reaction was completed, GO was separated from the mixture by different centrifugation speeds to obtain graphene oxide GO.

[0043] 2. Preparation of TiO by hydrothermal method 2 Nanotubes (TNTs): 0.70gTiO 2 The powder was dissolved in 10 mL of deionized water, then the mixture and NaOH solution (60 mL, 10 mol / L) were added to a 100 mL Teflon stainless steel autoclave and stirred vigorously at 130 °C for 24 hours, the precipitate was separated and dried at 60 °C to obtain TiO 2 nanotubes (TNTs).

[0044] 3. Fe mixed with TiO 2 Preparation of nanotubes: the TNTs prepared in the above step 2) and Fe(NO 3 ) 3 9H 2 O mixed, the mixture was dried a...

Embodiment 2

[0049] The specific preparation method of the present embodiment Fe / N co-doped-TNTs-graphene oxide composite catalyst is as follows:

[0050] 1. Preparation of graphene oxide GO: add 2.75g NaNO to a beaker 3 , 2.5g graphite, 150mL concentrated H 2 SO 4 , 15g KMnO 4 , H 2 o 2 (20 mL, 30%) was vigorously stirred; after the chemical reaction was completed, GO was separated from the mixture by different centrifugation speeds.

[0051] 2. Preparation of TiO by hydrothermal method 2 Nanotubes (TNTs): 0.60g TiO 2 The powder was dissolved in 10 mL of deionized water, then the mixture and NaOH solution (60 mL, 10 mol / L) were added to a 100 mL Teflon stainless steel autoclave and stirred vigorously at 130 °C for 24 hours, the precipitate was separated and dried at 60 °C to obtain TiO 2 nanotubes (TNTs).

[0052] 3. Fe mixed with TiO 2Preparation of nanotubes: the TNTs prepared in the above step 2) and Fe(NO 3 ) 3 9H 2 O mixed, the mixture was dried at 60 °C, and calcined at ...

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Abstract

The invention provides a method for preparing Fe/N co-doped-TNTs (TiO2 nano-tubes)-reduced graphene oxide composite catalysts, and belongs to the field of technologies for photocatalytically degrading organic pollutants. The method includes mixing TiO2 nano-tubes and Fe(NO3)3.9H2O with one another to obtain mixtures, drying the mixtures and calcining the mixtures in N2 flow to obtain Fe-TNTs; dispersing GO (graphene oxide), urea and the Fe-TNTs in water, mixing the GO, the urea, the Fe-TNTs and concentrated HNO3 with one another to obtain mixtures, adding the mixtures into a reaction kettle, carrying out heating reaction, then naturally cooling products until the temperatures of the products reach the room temperature, washing the products and calcining the products in N2 flow to obtain the Fe/N co-doped-TNTs-reduced graphene oxide composite catalysts. The method has the advantages that co-doping is carried out on Fe and N for the TiO2 nano-tubes, accordingly, the visible light sensitization degree can be upgraded, and organic pollutants can be photocatalytically degraded by the Fe/N co-doped-TNTs-reduced graphene oxide composite catalysts in visible light; the Fe/N co-doped-TNTs-reduced graphene oxide composite catalysts comprise TiO2 nano-tube and reduced graphene oxide compositions, accordingly, the absorption spectra of the Fe/N co-doped-TNTs-reduced graphene oxide composite catalysts can be extended and reach the visible light, and the photocatalytic degradation capacity of the Fe/N co-doped-TNTs-reduced graphene oxide composite catalysts for the organic pollutants can be improved; the graphene oxide is doped by N, electronic structures of the graphene oxide can be changed, accordingly, the density of free charge carriers of the graphene oxide can be increased, and the photocatalytic capacity of the Fe/N co-doped-TNTs-reduced graphene oxide composite catalysts in the visible light can be improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic degradation of organic pollutants, in particular to a preparation method of Fe / N co-doped-TNTs-reduced graphene oxide composite catalyst. Background technique [0002] Among many organic wastewater treatment methods, photocatalysis is considered as a promising route to treat organic wastewater using light energy. In recent years, titanium dioxide has attracted extensive attention due to its high chemical stability, high cost-effectiveness, environmental friendliness, and nontoxicity. As a typical nano-TiO 2 TiO 2 Nanotubes show better photocatalytic performance for water treatment due to large internal and external surface areas that facilitate photoelectron transport. Previous studies have shown that TiO can be improved by metal and nonmetal doping 2 However, some issues in the photocatalytic process are always neglected. For example, the separation process of the used photocatalysts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCB01J27/24B01J35/004C02F1/30C02F2101/30
Inventor 姚卫棠
Owner 张家港绿潮水环保科技有限公司
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