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Preparation method of fullerene-doped titanium dioxide visible-light-driven photocatalyst

A technology of titanium dioxide and fullerene, which is applied in the field of preparation of fullerene-doped titanium dioxide visible light catalyst, can solve the problems of complex process, poor catalyst adsorption performance and visible light catalytic performance, and achieve strong photocatalytic activity and strong adsorption capacity Effect

Inactive Publication Date: 2015-12-30
DONGHUA UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the general doping modification process is complicated, requires high-temperature calcination, and the adsorption performance and visible light catalytic performance of the obtained catalyst are poor. Therefore, the development process is simple, with strong adsorption capacity and high visible light catalytic activity. Doped TiO 2 Photocatalysts are of great significance in energy utilization and environmental governance, and have application prospects in the decolorization of printing and dyeing industrial wastewater

Method used

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  • Preparation method of fullerene-doped titanium dioxide visible-light-driven photocatalyst
  • Preparation method of fullerene-doped titanium dioxide visible-light-driven photocatalyst
  • Preparation method of fullerene-doped titanium dioxide visible-light-driven photocatalyst

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Embodiment 1

[0024] Preparation of carboxyl functionalized fullerene derivatives:

[0025] In a 100 ml single-necked volumetric flask, add 0.072 g of C60, 0.15 g of p-carboxybenzaldehyde, 0.089 g of sarcosine and 30 ml of toluene, and reflux at 115° C. for 10 hours under nitrogen protection. The solvent was removed by a vacuum rotary evaporator, the obtained solid was washed with water, and dried to obtain a carboxyl-functionalized fullerene derivative. Characterized by MALDI-TOF-MS, a series of mass spectrum peaks were observed at molecular weights ranging from 1253.6 to 2320.7, corresponding to 3-9 carboxyl substituents.

Embodiment 2

[0027] Fullerene-doped titanium dioxide visible light catalyst TiO 2 Preparation of / C60:

[0028] 20 mg of carboxyl functionalized fullerene derivatives (Example 1) and 1 gram of titanium dioxide (P25-TiO 2 ) was dispersed in 50 milliliters of dehydrated ethanol, and the gained solution was dispersed by ultrasonic waves for 30 minutes, and the solvent was slowly removed by rotary evaporation, and the obtained solid was dried in a vacuum oven to obtain fullerene-doped titanium dioxide (TiO 2 / C60) photocatalyst. Measure the wavelength range of absorbed light by diffuse reflectance absorption spectroscopy ( figure 1 ). It can be clearly seen that the TiO prepared by the present invention 2 The absorption spectrum of / C60 photocatalyst is better than that of undoped TiO 2 It has been extended to the visible light region (>400nm), indicating that the prepared catalyst has stronger visible light absorption performance. Visible by XRD characterization ( figure 2 ), the cry...

Embodiment 3

[0030] TiO 2 Visible-light catalytic degradation of rhodamine B dyes by / C60 photocatalyst:

[0031] Get 10 milligrams of the photocatalyst of the present invention (embodiment 2), join 10 milliliters concentration and be in the rhodamine B solution of 10 milligrams per liter, oscillate ultrasonically for 5 minutes, store in the dark place for 1 hour until the adsorption-desorption equilibrium, place Irradiate under a xenon lamp equipped with a 400-nanometer ultraviolet filter; pipette the mixed solution every 30 minutes, centrifuge, take the supernatant and measure the absorbance with a UV-visible spectrophotometer to calculate the concentration of residual rhodamine B, and pass The degradation rate was calculated by the ratio of the dye concentration at different irradiation times to the initial concentration before irradiation. The comparison results show that the TiO prepared by the present invention 2 / C60 photocatalyst is more active than undoped TiO 2 Higher, degrada...

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Abstract

The invention relates to a preparation method of a fullerene-doped titanium dioxide visible-light-driven photocatalyst. The method comprises the following steps: in the presence of nitrogen, reacting fullerene C60, p-carboxy benzaldehyde and sarcosine in an organic solvent for 8-10h at the temperature being 100-115 DEG C, and performing separation and purification to obtain carboxyl group functionalized fullerene derivatives; and dispersing the carboxyl group functionalized fullerene derivatives and titanium dioxide in absolute ethyl alcohol, performing ultrasonic dispersing, performing rotary evaporation, and performing vacuum drying to obtain the fullerene-doped titanium dioxide visible-light-driven photocatalyst. The method disclosed by the invention is simple, the prepared photocatalyst has the good dye absorption capacity and visible-light catalytic activity; under the illumination of a xenon lamp, the prepared photocatalyst can be used for highly efficiently degrading rhodamine dye and has an important application prospect in waste water decoloration treatment in printing and dyeing industry.

Description

technical field [0001] The invention belongs to the field of preparation methods of titanium dioxide visible light catalysts, in particular to a preparation method of fullerene-doped titanium dioxide visible light catalysts. Background technique [0002] Energy crisis and environmental pollution are two major problems facing the world at present, so the development and utilization of renewable clean energy has become a current research hotspot, among which the development and utilization of sunlight is recognized as the most promising application and is favored. The photocatalytic technology developed in recent years can not only use solar energy to photolyze water to generate energy material hydrogen, but also can be used as an effective method to degrade organic pollutants. Therefore with TiO 2 The representative photocatalyst has attracted extensive attention. However, TiO 2 The disadvantage is that it can only absorb short-wavelength ultraviolet light (<400 nanomet...

Claims

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Application Information

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IPC IPC(8): B01J31/38C02F1/30A62D3/17A62D101/28C02F101/38C02F103/30
CPCY02W10/37
Inventor 张煊王琦邹兰花尤嘉雯
Owner DONGHUA UNIV
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