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Cu2O-TiO2/reduced graphene oxide ternary complex, and preparation method and applications thereof

A ternary compound, cu2o-tio2 technology, applied in the field of photocatalysis, can solve the problems that restrict the wide application of nano-TiO, easy to compound powder materials, easy agglomeration, and influence

Active Publication Date: 2013-10-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, nano-TiO 2 The forbidden band width of nano-TiO is 3.2eV, and only the absorption of ultraviolet light with a wavelength equal to or less than 387nm can produce activity, which seriously restricts the nano-TiO 2 Wide application in the field of photocatalysis
In addition, nano-TiO 2 The photogenerated electron-hole pairs are easy to recombine and the powder materials are easy to agglomerate and other factors, which greatly affect its performance.

Method used

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  • Cu2O-TiO2/reduced graphene oxide ternary complex, and preparation method and applications thereof
  • Cu2O-TiO2/reduced graphene oxide ternary complex, and preparation method and applications thereof
  • Cu2O-TiO2/reduced graphene oxide ternary complex, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.5g of sodium nitrate and add it to 23mL of concentrated sulfuric acid, then add 1g of graphite under stirring, then slowly add 3g of potassium permanganate under ice bath cooling and stirring, and continue stirring in the ice bath for 2h. Remove the ice bath, heat up to 35°C, keep warm and stir for 2h. Slowly add 46mL of deionized water under stirring, raise the temperature to 98°C, keep warm for 15min, then further dilute to 140mL with warm deionized water, add about 10mL of 30% hydrogen peroxide to obtain a bright yellow mixture, and centrifuge. Finally, the GO was washed three times with hydrochloric acid solution with a volume ratio of 1:10, washed with water six times, and dried in vacuum at 45 °C for 24 h to obtain GO.

[0020] Put 0.5g GO in 65mL of absolute ethanol for ultrasonic treatment for 60min, add dropwise 3.1875g of butyl titanate, stir at room temperature for 40min, then add 0.8mL of deionized water, continue stirring for 40min, and then place i...

Embodiment 2

[0041] The preparation method of GO is the same as in Example 1.

[0042] Change the consumption of starting material by the method of embodiment 1 and prepare 60wt%Cu 2 O-30wt%TiO 2 - 10wt% RGO photocatalyst.

[0043] The evaluation method of the photocatalytic activity of the catalyst is the same as in Example 1.

[0044] The photocatalytic reaction system was irradiated with visible light for 5 hours, and the degradation rate of methyl orange reached 89.6%.

Embodiment 3

[0046] The preparation method of GO is the same as in Example 1.

[0047] Change the consumption of starting material by the method of embodiment 1 and prepare 85wt%Cu 2 O-5wt%TiO 2 - 10wt% RGO photocatalyst.

[0048] The evaluation method of the photocatalytic activity of the catalyst is the same as in Example 1.

[0049] The photocatalytic reaction system was irradiated with visible light for 5 hours, and the degradation rate of methyl orange reached 87.4%.

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Abstract

The invention discloses a Cu2O-TiO2 / reduced graphene oxide (RGO) ternary complex, and a preparation method and applications thereof. The preparation method of the ternary complex comprises the following steps: preparing graphene oxide (GO) through a Hummers method, preparing a TiO2 / RGO binary complex through a hydrothermal method, and preparing the Cu2O-TiO2 / RGO ternary complex through precipitating and reducing processes. The preparation method has the advantages of simplicity, low cost and benefiting for the industrialized production; and the prepared ternary complex has a high catalysis activity in a visible region as a visible-light-induced photocatalyst, has a high catalysis efficiency, is especially suitable for degrading organic pollutants in a solution, and can be used for photo-decomposing water to produce hydrogen and degrading volatile organic pollutants in air as the visible-light-induced photocatalyst.

Description

technical field [0001] The invention relates to a visible light responsive Cu 2 O-TiO 2 The invention discloses a reduced graphene (RGO) ternary compound and a preparation method and application thereof, belonging to the technical field of photocatalysis. technical background [0002] In the past two decades, the energy crisis, environmental pollution and greenhouse effect have become increasingly serious, which has greatly stimulated people's research interest in solar energy utilization, and photocatalytic purification technology has become a research hotspot in this field. In this field, although a variety of photocatalytic materials have been studied, the nanometer n-type semiconductor material TiO 2 Due to its good photocatalytic activity and stability, non-toxicity, low price, easy recycling and other advantages, it has become the most potential photocatalyst at present. [0003] However, nano-TiO 2 The forbidden band width of nano-TiO is 3.2eV, and only the absorp...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01D53/86B01D53/44C01B3/04
CPCY02A50/20Y02E60/36
Inventor 钱东彭三军谭功荣冯海波罗冬明刘金龙
Owner CENT SOUTH UNIV
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