Supported-type precious metal photocatalyser and preparation method thereof

A noble metal and catalyst technology, applied in the field of noble metal photochemical catalysts and their preparation, can solve the problems of difficult to effectively degrade organic pollutants, poor adsorption capacity of organic pollutants, and low utilization rate of photochemical catalysts, so as to improve photochemical catalytic ability and fully Use of light energy, catalytic effect to enhance the effect

Inactive Publication Date: 2016-02-03
赵晓宇
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Problems solved by technology

However, due to the high reflectivity of titanium dioxide itself, a considerable part of the ultraviolet light is reflected and difficult to be used, making the utilization rate of photochemical catalysts low.
In addition, due to the high recombination rate of photogenerated electrons and holes in the process of titanium dioxide as a photocatalyst, it will also lead to low photocatalytic efficiency. Difficult to effectively degrade organic pollutants in water

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  • Supported-type precious metal photocatalyser and preparation method thereof
  • Supported-type precious metal photocatalyser and preparation method thereof

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Embodiment Construction

[0024] A preparation method of a supported noble metal photochemical catalyst of the present invention comprises the following steps:

[0025] Step 1, preparation of single-layer graphene oxide; Step 2, preparation of titanium dioxide supported on the surface of graphene; Step 3, preparation of titanium dioxide catalyst loaded with graphene and noble metal, that is, preparation of supported noble metal photochemical catalyst.

[0026] The detailed steps are as follows:

[0027] 1. Preparation of monolayer graphene oxide:

[0028] Weigh 1g of graphite powder, add about 40g of sodium chloride solid, grind thoroughly, wash out the sodium chloride, filter and dry it, put it into 23mL of concentrated sulfuric acid (commercially available reagent, concentration is 98%, density 1.84g / cm3) and stir Leave it at room temperature for about 24 hours, then add about 5g of potassium permanganate under the condition of ice bath cooling, after stirring evenly, gradually raise the temperature...

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Abstract

The invention discloses a preparation method of a supported-type precious metal photocatalyser. The preparation method comprises the following steps: step 1, preparing single-layer oxidized graphene; step 2, preparing titanium dioxide loaded with graphene on the surface; step 3, preparing a titanium dioxide catalyst loaded with graphene and precious metal, namely preparing the supported-type precious metal photocatalyser; the supported-type precious metal photocatalyser utilizes the ultraviolet absorption ability of graphene, and the graphene material loaded on titanium dioxide is further adopted, so that the absorption of ultraviolet light is increased, absorbed light energy is transferred to titanium dioxide and the precious metal catalyst through energy resonance, the effect of more fully utilizing the light energy is achieved, the photochemical catalytic capacity of precious metal is improved, the dosage of the precious metal photocatalyser is reduced, and the production cost of enterprises is further reduced.

Description

technical field [0001] The invention relates to a noble metal photochemical catalyst and a preparation method thereof, in particular to an activated carbon-loaded noble metal photochemical catalyst and a preparation method thereof. Background technique [0002] Photochemical reactions are widely used in organic synthesis and environmental protection. Titanium dioxide has a good band gap, strong oxidation ability, and non-toxic, biological, chemical and photochemical stability, so people use nano-titanium dioxide as a commonly used photochemical reaction catalyst. At the same time, because titanium dioxide has good photocatalytic activity under the action of ultraviolet light, it has also become a research hotspot of semiconductor photocatalysts. Recently, some people have loaded platinum and titanium dioxide together to enhance its catalytic activity. However, due to the high reflectivity of titanium dioxide itself, a considerable part of the ultraviolet light is reflected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/50B01J23/52B01J32/00
Inventor 赵晓宇张帅韩爱英
Owner 赵晓宇
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