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Light-driven CO2 reduction method of silver-modified copper-loaded zeolite Ag/Cu-TS-1

A TS-1, cu-ts-1 technology, applied in chemical instruments and methods, chemical/physical processes, catalyst activation/preparation, etc., can solve the problems of low product selectivity and low efficiency, and achieve the inhibition of competitive hydrogen evolution. The effect of reaction, improving stability, good photoelectric catalytic activity and stability

Pending Publication Date: 2022-05-13
HAINAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing material systems for photocatalytic CO 2 Low efficiency, low product selectivity

Method used

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  • Light-driven CO2 reduction method of silver-modified copper-loaded zeolite Ag/Cu-TS-1
  • Light-driven CO2 reduction method of silver-modified copper-loaded zeolite Ag/Cu-TS-1
  • Light-driven CO2 reduction method of silver-modified copper-loaded zeolite Ag/Cu-TS-1

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Experimental program
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Embodiment

[0038] Light-driven CO of a silver-modified copper-loaded zeolite Ag / Cu-TS-1 2 The restoration method includes the following steps:

[0039] Step 1: Synthesize copper-loaded zeolite Cu-TS-1 by one-step hydrothermal method, specifically as follows:

[0040] Step 1.1: Add 0.1 g Na to 8 ml deionized water 2 CO 3 , then add 14.4g of tetrapropylammonium hydroxide with a purity of 25wt%, stir it with a constant magnetic field at 40°C for 4h, then slowly add 3.9g of H 2 SiO 3 ;

[0041] Step 1.2: Add 0.24g of Ti(SO 4 ) 2 Add 3ml of deionized water dropwise to the solution prepared in step 1.1, stir vigorously at 40°C for 6h, then transfer the solution to a 50mL polytetrafluoroethylene autoclave, and keep at 150°C for 24 hours;

[0042] Step 1.3: Centrifuge the solution after the autoclave reaction in Step 1.2, wash with deionized water three times, and air-dry at 100°C for 8 hours to obtain a solid substance;

[0043] Step 1.4: Calcining the solid material obtained in Step 1....

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Abstract

The invention belongs to the technical field of chemical engineering, and particularly relates to a light-driven CO2 reduction method of silver-modified copper-loaded zeolite Ag / Cu-TS-1. The method comprises the following steps: 1, synthesizing zeolite TS-1 by adopting a one-step hydrothermal method; step 2, preparing Cu-TS-1 on the basis of the step 1; step 3, dissolving AgNO3 in deionized water, and adding into the methanol suspension of Cu-TS-1 prepared in the step 2, so as to prepare silver modified copper loaded zeolite Ag / Cu-TS-1; 4, dissolving the silver-modified copper-loaded zeolite Ag / Cu-TS-1 prepared in the step 3 in acetone and an aqueous solution to prepare a carbon paper coating catalyst; 5, the carbon paper coating catalyst is suspended in a KHCO3 solution, a platinum sheet and Ag / AgCl serve as a counter electrode and a reference electrode respectively, CO2 gas is blown into the KHCO3 solution, a xenon lamp is turned on, and photoelectrochemical reduction of CO2 is achieved. The prepared catalyst Ag / Cu-TS-1 has super light absorption performance and separation efficiency of charges generated by light, and realizes efficient and stable catalysis of conversion of CO2 into CH3OH and C2H6OH under ultraviolet visible light.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a light-driven CO 2 restore method. Background technique [0002] Catalytic reduction of excess CO 2 into hydrocarbons such as CH 4 , HCOOH, CH 3 OH,C 2 h 5 Chemical fuels such as OH are of great significance for renewable energy storage and environmental protection. catalytic reduction of CO 2 methods, including thermocatalysis, photocatalysis, electrocatalysis, and newly developed photocatalysis. Among them, the use of semiconductors to absorb solar energy is considered to be the most promising clean energy, which can realize the conversion of carbon dioxide under relatively mild reaction conditions. [0003] However, most photocatalysts are limited due to low light utilization efficiency and high recombination rate of photogenerated hole-electron pairs. In recent years, photoelectrocatalytic technology can guide the migration of photoelectrons and promote th...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B11/067C25B3/07C25B3/26C25B3/21B01J29/89B01J37/10B01J37/03B01J37/34
CPCC25B11/091C25B11/067C25B3/07C25B3/26C25B3/21B01J29/89B01J37/10B01J37/035B01J37/344B01J2229/186B01J35/33B01J35/39
Inventor 孙元元李国辉孙伟刘文青李冰鹏王锦锦闫灵
Owner HAINAN NORMAL UNIVERSITY
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