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Pt nanparticle-supported MnO2 catalyst, its preparation method and application thereof

A nanoparticle and catalyst technology, which is applied in the field of MnO2 catalyst loaded with highly dispersed Pt nanoparticles and its preparation, can solve the problems of high equipment requirements, infrequent use, complicated preparation process, etc., and achieve low cost, simple operation, and advanced technology simple effect

Active Publication Date: 2012-10-17
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods are generally not commonly used due to the complex preparation process and high requirements for equipment.

Method used

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  • Pt nanparticle-supported MnO2 catalyst, its preparation method and application thereof
  • Pt nanparticle-supported MnO2 catalyst, its preparation method and application thereof
  • Pt nanparticle-supported MnO2 catalyst, its preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Cocoon-like MnO 2 Synthesis: Weigh 2.5353g of manganese sulfate monohydrate (MnSO 4 ·H 2 O) Dissolve in 150mL water, after fully dissolving under the condition of stirring, add dropwise the solution containing 1.5803g potassium permanganate (KMnO 4) in 100mL aqueous solution at a rate of about 1-2 drops / s, then stirred and reacted at room temperature for 6 hours, centrifuged the obtained black product, washed the precipitated product with water and ethanol, and finally washed the obtained product at 60 Dry overnight in an oven at °C. Take a small amount of dried samples and redisperse them in ethanol, ultrasonically disperse them under 120w, 40KHz ultrasonic conditions for 5 to 20 minutes, spot them on silicon wafers, stick them on the sample stage of scanning electron microscope, spray gold after drying, and then Observed on a scanning electron microscope, MnO 2 The scanning electron microscope picture of the carrier; the prepared sample was ground into powder and ...

Embodiment 2

[0056] Urchin-like MnO 2 Synthesis: Weigh 1.6902g of manganese sulfate monohydrate and dissolve it in 100mL of water. After fully dissolving under stirring conditions, add 1mL of concentrated sulfuric acid with a mass concentration of 98%, and then use a separatory funnel to add 1.0535g of permanganic acid 66.7mL aqueous solution of potassium, the dropping rate is about 1-2 drops / s, stirred and reacted at 80°C for 24 hours, centrifuged the obtained dark brown product, washed the obtained precipitated product with water and ethanol, and finally washed the obtained product Dry overnight in an oven at 60°C. Get black urchin-like MnO 2 . Take a small amount of dried samples and redisperse them in ethanol, ultrasonically disperse them under 120w, 40KHz ultrasonic conditions for 5 to 20 minutes, spot them on silicon wafers, stick them on the sample stage of scanning electron microscope, spray gold after drying, and then Observed on a scanning electron microscope, MnO 2 The scann...

Embodiment 3

[0058] Bird's nest MnO 2 Synthesis: Weigh 0.5531g KMnO 4 Dissolved in 14mL of water, transferred to a 40mL container lined with polytetrafluoroethylene, and then added dropwise with a separatory funnel containing 0.8873gMnSO 4 ·H 2 O and 0.3 mL of 98% concentrated H 2 SO 4 21mL aqueous solution, the dropping rate is about 1-2 drops / s, hydrothermal reaction at 120°C for 12 hours, centrifuge the obtained dark brown product, wash the obtained precipitated product with water and ethanol, and finally wash the obtained product at 60 Dry overnight in an oven at °C. Take a small amount of dried samples and redisperse them in ethanol, ultrasonically disperse them under 120w, 40KHz ultrasonic conditions for 5 to 20 minutes, spot them on silicon wafers, stick them on the sample stage of scanning electron microscope, spray gold after drying, and then Observed on a scanning electron microscope, MnO 2 The scanning electron microscope picture of the carrier; the prepared sample was gro...

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Abstract

The invention relates to a high-dispersibility Pt nanoparticle supported MnO2 catalyst, its preparation method and an application thereof. According to the preparation method, under the condition of an aqueous solution, sodium citrate, PVP, ascorbic acid and chloroplatinic acid are used as raw materials to synthesize Pt nanoparticles, which are used as an active component to be loaded on an MnO2 carrier, so as to obtain the catalyst which is formed by the MnO2 carrier and the Pt nanoparticles loaded on the surface of the carrier. The loading of the Pt nanoparticles accounts for 0.1-10% of the weight of the catalyst. The catalyst can be used for catalytic degradation of indoor pollutants (such as formaldehyde) and used for preparation of electrode materials for cells, magnetic materials, fuel cells and the like. The catalyst can be used for complete catalytic degradation of formaldehyde at low temperatures, and has advantages of high efficiency, low energy consumption, simple operation, mild reaction condition and secondary pollution eradication.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to MnO loaded with highly dispersive Pt nanoparticles 2 Catalyst and its preparation method and application. Background technique [0002] The indoor environment is the main place where modern people live and work, and indoor air quality is closely related to people's physical and mental health. The pollution of indoor and closed systems has aroused great concern from all walks of life. Studies have shown that indoor pollution hazards are mainly volatile organic compounds such as formaldehyde, benzene and its homologues, and inorganic compounds such as ammonia, radon, carbon monoxide, and nitrogen oxides. Among them, formaldehyde is a highly toxic substance. Short-term exposure can irritate the eyes, nasal cavity and respiratory tract and cause allergic reactions. Long-term exposure can cause genotoxicity, carcinogenicity, lung function damage, neurobehavioral cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656A62D3/38
Inventor 贺军辉于学华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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