Composite type visible-light-induced photocatalyst and preparation method thereof
A technology of visible light and catalyst, applied in the field of composite visible light catalyst and its preparation, can solve the problems of low utilization efficiency of sunlight and other problems, achieve the effect of improving photocatalytic efficiency and simple and easy preparation method
Active Publication Date: 2014-09-10
EAST EIGHT ENERGY (SHANGHAI) CO LTD
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However, due to TiO 2 The forbidden band of TiO is wide, and only the high-energy ultraviolet light can excite its photocatalytic activity, and the light utilization efficiency of sunlight is low. In the application process, it is often necessary to use ultraviolet light source, which limits the performance of TiO2. 2 Wider applications of photocatalytic materials
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[0017] A composite visible light catalyst whose composition is porphyrin-sensitized titanium dioxide nanowire / reduced graphene oxide composite material; as figure 2 As shown, the diameter of titanium dioxide nanowires is 100-150 nm, and the length is 1-1.5 um. Porphyrin was used as a sensitizer to sensitize the TiO nanowire / reduced graphene oxide composite to increase the photoresponse range.
[0018] A method for preparing a composite visible light catalyst, comprising the following steps:
[0019] (1) Preparation of titanium-based titania nanowire matrix by hydrothermal synthesis method: TiO2 nanowires were prepared by hydrothermal synthesis method. First, the titanium sheet was ultrasonically cleaned with 15 mL of acetone and absolute ethanol for 15 min; after rinsed with deionized water, The titanium sheet was transferred to an oven at 80°C for drying. The dried titanium sheet was transferred to an autoclave containing 10 mL of 1.0 mol / L NaOH, reacted in an oven at 240 ...
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Abstract
The invention discloses a composite type visible-light-induced photocatalyst and a preparation method of the composite type visible-light-induced photocatalyst. The composite type visible-light-induced photocatalyst comprises the component of titanium dioxide nanowire / reduction-oxidation graphene composite material sensitized by porphyrin, wherein the titanium dioxide nanowire has the diameter of 100-150nm and the length of 1-1.5mu m. The preparation method comprises the steps of firstly, preparing the titanium dioxide nanowire and the reduction-oxidation graphene, then enabling the reduction-oxidation graphene to be deposited onto the titanium dioxide nanowire by an electrophoretic deposition method, and finally, sensitizing the titanium dioxide nanowire / reduction-oxidation graphene composite material with the porphyrin to obtain the composite type photocatalyst. The composite type photocatalyst has the characteristics of being higher in stability and high in catalytic efficiency, and has obvious degradation function on organic pollutant such as methylene blue, etc.
Description
technical field [0001] The invention belongs to the technical field of ring photocatalysis, and in particular relates to a composite visible light catalyst and a preparation method thereof. Background technique [0002] Because photocatalytic technology can use solar energy to react at room temperature, it is more economical; photocatalyst itself is non-toxic, harmless, non-corrosive, and can be used repeatedly; it can completely mineralize organic pollutants into inorganic ions, without secondary pollution, Therefore, it has the incomparable attractive charm of traditional high temperature, conventional catalytic technology and adsorption technology, and is a green environmental management technology with broad application prospects. TiO 2 Due to the advantages of high photocatalytic activity, strong photocorrosion resistance, good stability, environmental friendliness, relatively low price, and non-toxic to human body, it has become the most deeply researched photocatalyt...
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IPC IPC(8): B01J31/38B01J35/02B01J35/00
Inventor 董文钧阮朝晖李小云张晓波
Owner EAST EIGHT ENERGY (SHANGHAI) CO LTD