Carbon material supported palladium catalyst, as well as preparation and application thereof

A palladium catalyst and carbon material technology, applied in the field of palladium catalysts supported by carbon materials, can solve the problems of catalysts being difficult to reuse, low oxidant contact efficiency, and few reaction sites, and achieve simple and easy preparation methods, low cost, The effect of high reactivity

Active Publication Date: 2018-12-21
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a palladium catalyst immobilized on carbon materials, its preparation method and application, which fully combines the characteristics and application requirements of the palladium catalyst, and is targeted at the palladium catalyst carrying carrier and The immobilization method was redesigned, and a palladium catalyst immobilized on carbon materials with large specific surface area, high contact efficiency and high reactivity was correspondingly obtained, thereby solving the problem of the high cost of palladium catalysts used in existing advanced oxidation technologies, the reaction Technical problems such as fewer sites, low oxidant contact efficiency, low reaction efficiency, and difficulty in reusing catalysts

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  • Carbon material supported palladium catalyst, as well as preparation and application thereof
  • Carbon material supported palladium catalyst, as well as preparation and application thereof
  • Carbon material supported palladium catalyst, as well as preparation and application thereof

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preparation example Construction

[0033] The preparation method of the palladium catalyst that the carbon material that the present invention proposes immobilizes may further comprise the steps:

[0034] (1) Mix the biomass material and the palladium salt solution, adjust the pH to alkaline, perform a hydrothermal reaction after mixing to obtain a hydrothermal reaction product; the hydrothermal reaction is used to hydrothermally carbonize the biomass material, and Organic functional groups on the surface bind to palladium;

[0035] (2) The hydrothermal reaction product is subjected to solid-liquid separation to obtain a solid phase, and the solid phase is dried and then heat-treated to obtain the carbon-supported palladium catalyst; the heat treatment is used to remove the dried Binding water in the product, increasing the specific surface area of ​​the product and improving the binding force between the carbon substrate and palladium.

[0036] The biomass material in step (1) can be any biomass material, and...

Embodiment 1

[0060] A kind of preparation method of the palladium catalyst that carbon material is immobilized, the preparation process schematic diagram is as figure 1 shown, including the following steps:

[0061] (1) After mixing sawdust and palladium salt, adjust the pH to 10.0, stir with a magnetic stirrer at room temperature for 3 hours, and then put the mixed mixture into an ultrasonic wave for 40 minutes to make the Pd and sawdust evenly dispersed. Put the ultrasonically completed mixture into a hydrothermal reaction kettle, conduct a hydrothermal reaction at 200°C for 24 hours, vacuum filter, and dry to obtain a hydrothermal reaction product; sieve wood chips, select 50-mesh undersize, 200-mesh oversize , that is, the particle size range of wood chips is selected to be 75-280 μm, the mass ratio of palladium salt to wood chips is 1:10, and the solid-liquid ratio of the hydrothermal reaction is 1:10, the catalyst performance is better,

[0062] (2) The hydrothermal reaction product...

Embodiment 2

[0080] A kind of preparation method of the palladium catalyst particle of carbon material immobilization, comprises the steps:

[0081] (1) Use dried corn cobs, after grinding, take the 50-mesh sieve and the 200-mesh sieve (particle size 75-280 μm) and mix them with palladium salt, adjust the pH to 10.0, and stir with a magnetic stirrer at room temperature After 2 hours, put the mixed mixture into an ultrasonic wave for 30 minutes, so that the Pd and biomass materials are evenly dispersed. Put the ultrasonically completed mixture into a hydrothermal reaction kettle, conduct a hydrothermal reaction at 200°C for 12 hours, vacuum filter, and dry to obtain a hydrothermal reaction product; the mass ratio of palladium salt to sawdust is 1:10, and the hydrothermal reaction The solid-liquid ratio of the reaction is 1:5, and the performance of the prepared catalyst is better.

[0082] (2) The hydrothermal reaction product is subjected to solid-liquid separation to obtain a solid phase...

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Abstract

The invention belongs to the field of waste water treatment, and particularly relates to a carbon material supported palladium catalyst, as well as a preparation method and application thereof. The preparation method comprises the steps of mixing a biomass material and a palladium salt solution, adjusting pH to be alkaline, and carrying out hydrothermal reaction after mixing so as to obtain a hydrothermal reaction product; then carrying out solid-liquid separation on the hydrothermal reaction product to obtain a solid phase, drying the solid phase, and carrying out heat treatment to obtain a carbon-supported palladium catalyst; correspondingly obtaining the carbon material supported palladium catalyst with large specific surface area, high contact efficiency and high reaction activity, sothat the technical problems of higher palladium catalyst cost, less reaction sites, low oxidant contact efficiency, low reaction efficiency, difficulty in reusing the catalyst and the like in an existing advanced oxidation technology are solved.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and more specifically relates to a palladium catalyst supported by carbon materials, a preparation method and application thereof. Background technique [0002] With the development of industry, pesticides and fertilizers, and various petroleum-derived materials industries, the pollution of water bodies by refractory organic pollutants such as phenols has become increasingly serious. Compared with general sewage, the content of pollutants in this kind of sewage is relatively low, but it is difficult to be treated by most sewage treatment systems, and the problem of its advanced treatment and discharge has not been effectively solved. People who drink water containing trace amounts of organic pollutants for a long time are more likely to suffer from digestive tract cancer. At present, several commonly used sewage treatment processes at home and abroad have unsatisfactory treatment effects on r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J35/10B01J37/10C02F1/30C02F1/72C02F101/30
CPCB01J23/44B01J35/1014B01J35/1019B01J37/10C02F1/30C02F1/725C02F2101/30
Inventor 陈朱琦王华斌周新全侯鹏飞陈朱蕾
Owner HUAZHONG UNIV OF SCI & TECH
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