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Preparation and application of Ag-RGO-Cds ternary nano compound

A nano-composite and composite technology, applied in the directions of carbon monoxide, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low conversion rate, high probability of photo-generated electron-hole recombination, poor selectivity, etc., to improve the reaction rate. Activity, excellent physical and chemical properties, the effect of mild reaction conditions

Active Publication Date: 2017-08-18
FUZHOU UNIV
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Problems solved by technology

However, in the photocatalytic reduction of CO 2 During the photoreduction process, semiconductor materials have high probability of recombination of photogenerated electrons and holes, resulting in problems such as low conversion rate and poor selectivity in photoreduction.

Method used

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  • Preparation and application of Ag-RGO-Cds ternary nano compound
  • Preparation and application of Ag-RGO-Cds ternary nano compound
  • Preparation and application of Ag-RGO-Cds ternary nano compound

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Embodiment 1

[0024] Preparation of cadmium sulfide nanorods (CdS nanorods): According to the solvothermal method, take 2 mmol CdCl 2 . 2.5H 2 O and 6mmol thiourea were dissolved in 20 mL of ethylenediamine, and stirred thoroughly to dissolve. Then it was transferred to a 28 mL polytetrafluoroethylene-lined reactor, put into a steel jacket and placed in an oven to program the temperature to 160°C, and react for 48 h. After it was naturally cooled to room temperature, the obtained sample was centrifuged and washed with ethanol and deionized water three times, and dried in a vacuum oven at 60°C.

[0025] Synthesis of RGO-CdS complex by thermal reduction method: Using chemical thermal reduction method, weigh 100 mg of CdS nanorods into a round bottom flask containing 50 mL of ethylene glycol (EG), stir and disperse thoroughly, and then add 3 mL of dispersed GO (1 mg / mL) solution. After stirring for 20 hours, heating to 140℃ and refluxing for 3 hours, cooling to room temperature, centrifugal wash...

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Abstract

The invention relates to preparation and application of an Ag-RGO-Cds ternary nano compound, and belongs to the field of photocatalytic reduction of CO2. The preparation comprises the following steps: preparing CdS nanorods by using a solvothermal method; reducing graphene oxide GO into reduced graphene oxide RGO by a thermochemical reduction mode and compounding the reduced graphene oxide RGO with the CdS nanorods; and loading Ag on a RGO-CdS compound by a photodeposition mode to obtain an Ag-RGO-CdS ternary nano compound. The method is easy to operate, and the reaction conditions are gentle. When the material is applied in photocatalytic reduction of CO2, photocatalytic activity and product selectivity are excellent. By addition of Ag, activity of catalytic reaction is improved, and by introduction of RGO, the photoreduction selectivity is enhanced. The method has wide application prospects in the aspects of reduction of concentration of CO2 in the atmosphere, discussion of substitute goods of fossil energy, efficient development and utilization of solar energy and the like.

Description

Technical field [0001] The invention belongs to photocatalytic reduction of CO 2 The technical field, specifically related to the preparation method of Ag-RGO-CdS ternary nanocomposite and its photocatalytic reduction of CO 2 application. [0002] technical background [0003] With the rapid development of the economic and social level, the continuous consumption of non-renewable fossil fuels, and the increasing demand for energy by mankind, the problems of environmental pollution and energy crisis have become increasingly prominent. It is urgent to develop green and new renewable energy sources and reduce harmful gas emissions. Driven by solar energy, using semiconductor photocatalysis technology, CO 2 Photocatalytic conversion into useful CO, CH 4 , HCOOH, CH 3 Hydrocarbon fuels such as OH and HCHO have important theoretical and practical significance for alleviating the environmental problems caused by the greenhouse effect and remedying the energy crisis caused by energy shorta...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J23/50B01J21/18C01B32/40
CPCB01J21/18B01J23/50B01J27/04B01J35/39Y02P20/133
Inventor 侯乙东祝泽周丁正新龙金林
Owner FUZHOU UNIV
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