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Preparation method and application of cerium-doped titanium dioxide/graphene aerogel

A graphene aerogel and titanium dioxide technology, applied in the field of aerogel, can solve the problems of poor catalytic activity of titanium dioxide and difficult recovery of powder materials, and achieve the effects of improving photocatalytic activity, being beneficial to reuse, and improving degradation efficiency.

Pending Publication Date: 2018-07-13
SUIHUA UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the titanium dioxide prepared by the existing method has poor catalytic activity under visible light and the powder material is difficult to recycle, and provide a preparation method and application of cerium-doped titanium dioxide / graphene airgel

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  • Preparation method and application of cerium-doped titanium dioxide/graphene aerogel
  • Preparation method and application of cerium-doped titanium dioxide/graphene aerogel

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specific Embodiment approach 1

[0039] Embodiment 1: This embodiment is a preparation method of cerium-doped titanium dioxide / graphene airgel, which is specifically completed according to the following steps:

[0040] 1. Preparation of graphene oxide solution:

[0041] Add ultrapure water to graphite oxide, and then ultrasonicate for 1h to 6h at an ultrasonic power of 30kHz to 60kHz to obtain a uniform brownish-brown graphene oxide solution; The graphene oxide solution was centrifuged for 3 minutes to 10 minutes, and the supernatant was taken to obtain a graphene oxide solution with a concentration of 1.5 mg / mL to 3.5 mg / mL;

[0042] The mass of graphite oxide described in step one and the volume ratio of ultrapure water are (0.24g~0.64g): 160mL;

[0043] 2. Preparation of cerium-doped titanium dioxide:

[0044] ①. Add tetrabutyl titanate to absolute ethanol at a stirring speed of 500r / min-1000r / min, and then stir for 3min-8min at a stirring speed of 500r / min-1000r / min to obtain solution A;

[0045]The vo...

specific Embodiment approach 2

[0065] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, ultrapure water is added to graphite oxide, and then ultrasonic power is 60kHz for 1h to 2h to obtain tan uniform graphene oxide solution; centrifuge the tan uniform graphene oxide solution at a centrifugation speed of 1000r / min-3000r / min for 3min-5min, take the upper layer of centrifugate, and obtain a graphene oxide solution with a concentration of 1.5mg / mL-2.5mg / mL . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0066] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of the graphite oxide described in step 1 to the ultrapure water is (0.24g-0.4g): 160mL. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method and application of cerium-doped titanium dioxide / graphene aerogel and relates to aerogel and application thereof, aiming at solving the problems that titanium dioxide prepared by an existing method has poor catalytic activity under visible light and a powder material is difficult to recycle. The method comprises the following steps: 1, preparing a graphene oxide solution; 2, preparing cerium-doped titanium dioxide; 3, preparing the cerium-doped titanium dioxide / graphene aerogel. The cerium-doped titanium dioxide / graphene aerogel is used for degradingphenol-containing wastewater. The cerium-doped titanium dioxide / graphene aerogel prepared by the invention can be used for degrading phenol under the illumination of the visible light and the maximumlight degradation rate is 90.6 percent after the phenol is degraded for 3h; in a degradation process of surface water organic pollutants, the cerium-doped titanium dioxide / graphene aerogel has a great application potential. The cerium-doped titanium dioxide / graphene aerogel can be obtained.

Description

technical field [0001] The invention relates to an airgel and its application. Background technique [0002] With the acceleration of my country's industrialization process, industrial wastewater containing a large amount of organic pollutants is discharged into rivers. The traditional treatment methods are mainly high-temperature incineration and adsorption. These methods are relatively simple to operate, but because they are only physical adsorption or simple treatment, there is no real decomposition. Organic pollutants cannot completely eliminate the damage to the environment caused by organic pollutants, resulting in increasingly serious water pollution. [0003] Photocatalytic degradation of organic pollutants has attracted increasing attention in recent decades. The photocatalytic method has fast degradation speed, long service life, no selectivity to organic pollutants, low energy consumption, and can completely decompose organic pollutants. Among many semiconductor ...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J37/03B01J37/08B01J37/10C02F1/30C02F101/34
CPCC02F1/30B01J23/002B01J23/10B01J37/036B01J37/082B01J37/10B01J37/32C02F2101/345C02F2305/10B01J35/23B01J35/39
Inventor 乔秀丽迟彩霞田军乔家乐
Owner SUIHUA UNIV
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