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A kind of ag loaded with platinum and silver nanoparticles 0.333 v 2 o 5 Nanorod composites and their preparation and application

A technology of silver nanoparticles and nanorods, which is applied to the composite material of photoelectric catalytic oxidation reaction. The preparation field of the above composite material can solve the problem of low utilization rate of visible light by semiconductors, and achieve suitable for mass production, uniform distribution, photoelectric Effect of Catalytic Oxidation Performance Improvement

Active Publication Date: 2022-07-19
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For Ag 0.333 V 2 o 5 To solve the problem that semiconductors have low utilization rate of visible light, the present invention firstly prepares Ag by hydrothermal process x V 2 o 5 The precursor is impregnated with a chloroplatinic acid solution, and then the chloroplatinic acid is reduced to platinum nanoparticles through a hydrogen reduction process. At the same time, part of the Ag in the precursor is reduced to Ag nanoparticles to obtain Ag nanoparticles loaded with platinum and silver nanoparticles. 0.333 V 2 o 5 Composite materials; Broaden Ag by virtue of silver's plasmon resonance effect 0.333 V 2 o 5 Absorption and Utilization Efficiency of Semiconductors for Visible Light

Method used

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  • A kind of ag loaded with platinum and silver nanoparticles <sub>0.333</sub> v <sub>2</sub> o <sub>5</sub> Nanorod composites and their preparation and application
  • A kind of ag loaded with platinum and silver nanoparticles <sub>0.333</sub> v <sub>2</sub> o <sub>5</sub> Nanorod composites and their preparation and application
  • A kind of ag loaded with platinum and silver nanoparticles <sub>0.333</sub> v <sub>2</sub> o <sub>5</sub> Nanorod composites and their preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1: Weigh 0.18 g of vanadium pentoxide powder, add 5 ml of hydrogen peroxide (30 wt %), and react vigorously for a few minutes to form a dark red solution. Pipette 50 ml of deionized water into the above solution to form a reddish-brown transparent solution. Under the condition of magnetic stirring, 10 ml of silver nitrate solution (5 mmol / L) was slowly poured into the above solution. After stirring evenly, the mixed solution was transferred to a 100 ml polytetrafluoroethylene-lined reaction kettle, and the reaction kettle was placed in an oven at 180 degrees Celsius for 24 hours. After naturally cooling to room temperature, the precipitate was centrifuged, washed with deionized water and ethanol, and the obtained samples were dried in a blast drying oven for 24 hours to obtain sample Ag x V 2 O 5 .

[0029] Step 2: Put 95 mg Ag x V 2 O 5 Add 30 ml of deionized water and sonicate for 10 minutes. Add 1.330 mL of chloroplatinic acid aqueous solution with a con...

Embodiment 2

[0031] Step 1: Weigh 0.18 g of vanadium pentoxide powder, add 5 ml of hydrogen peroxide (30 wt%), and react vigorously for a few minutes to form a dark red solution. Pipette 35 ml of deionized water into the above solution to form a reddish-brown transparent solution. Under the condition of magnetic stirring, 25 ml of silver nitrate solution (5 mmol / L) was slowly poured into the above solution. After stirring evenly, the mixed solution was transferred to a 100 ml polytetrafluoroethylene-lined reaction kettle, and the reaction kettle was placed in an oven at 180 degrees Celsius for 24 hours. After cooling to room temperature naturally, the precipitate was centrifuged and used for Ionized water and ethanol were centrifuged and washed, and the obtained sample was dried in a blast drying oven for 24 hours to obtain sample Ag x V 2 O 5 .

[0032] Step 2 is the same as in Example 1.

Embodiment 3

[0034] Step 1: Weigh 0.18 g of vanadium pentoxide powder, add 5 ml of hydrogen peroxide (30 wt %), and react vigorously for a few minutes to form a dark red solution. Pipette 20 ml of deionized water into the above solution to form a reddish-brown transparent solution. Under magnetic stirring, 40 ml of silver nitrate solution (5 mmol / L) was slowly poured into the above solution. After stirring evenly, the mixed solution was transferred to a 100-ml polytetrafluoroethylene-lined reaction kettle, and the reaction kettle was placed in an oven at 180 degrees Celsius for 24 hours. After cooling to room temperature naturally, the precipitate was centrifuged and used for Ionized water and ethanol were centrifuged and washed, and the obtained sample was dried in a blast drying oven for 24 hours to obtain sample Ag x V 2 O 5 .

[0035] Step 2 is the same as in Example 1.

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Abstract

The present invention relates to a kind of Ag 0.333 V 2 O 5 The composite material of nanorods and platinum and silver nanoparticles, specifically, is a photocatalyst with plasmon resonance effect. The preparation process includes the following steps: (1) firstly adopt a hydrothermal process to prepare Ag x V 2 O 5 nanorods; (2) Ag x V 2 O 5 Nanorods are dipped in chloroplatinic acid solution, dried and reduced in a reducing atmosphere to obtain Ag 0.333 V 2 O 5 Pt / Ag / Ag composites of nanorods with platinum and silver nanoparticles 0.333 V 2 O 5 . The material has excellent photoelectric catalytic oxidation performance for methanol and the like. The preparation method involved in the present invention has the advantages of simple process, green environmental protection and easy enlargement.

Description

technical field [0001] The invention relates to an inorganic composite material of noble metal and semiconductor, in particular to a composite material that can be used for photoelectric catalytic oxidation reaction. The present invention also relates to the preparation method of the above-mentioned composite material. [0002] technical background [0003] The methanol electro-oxidation reaction is the anode reaction of direct methanol fuel cells, and its reaction rate has a significant impact on the discharge performance of methanol fuel cells. Methanol oxidation is a 6-electron transfer process with slow kinetics, and the intermediate product CO easily poisons the platinum catalyst, which seriously restricts the battery performance. As an inexhaustible source of energy, solar energy is expected to couple methanol oxidation to improve its kinetic rate. Therefore, the development of high-efficiency photocatalysts is crucial to improve the utilization of light. In recent y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/68H01M4/86H01M4/88H01M4/90H01M4/92
CPCB01J23/682B01J35/0033B01J35/004H01M4/8647H01M4/8882H01M4/9016H01M4/921Y02E60/50
Inventor 姜鲁华谢兴明崔学晶刘静
Owner QINGDAO UNIV OF SCI & TECH
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