Hydrate carbon/amorphous molybdenum poly-selenide composite material as well as preparation method and application thereof

A composite material and amorphous technology, applied in chemical instruments and methods, inorganic chemistry, water/sewage treatment, etc., can solve the problems of unsatisfactory palladium adsorption effect, ineffective diffusion, easy agglomeration of molybdenum selenide, etc., and achieve cost Low, excellent removal effect, good hydrophilic effect

Active Publication Date: 2020-10-16
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the interlayer spacing of crystalline molybdenum diselenide is small, and the water and radius of palladium ions are large, which cannot effectively diffuse into the interior. In additi

Method used

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  • Hydrate carbon/amorphous molybdenum poly-selenide composite material as well as preparation method and application thereof
  • Hydrate carbon/amorphous molybdenum poly-selenide composite material as well as preparation method and application thereof
  • Hydrate carbon/amorphous molybdenum poly-selenide composite material as well as preparation method and application thereof

Examples

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Example Embodiment

[0039] The present invention provides a preparation method of the hydrated carbon / amorphous molybdenum selenide composite material according to the above technical scheme, which includes the following steps:

[0040] (1) Mix the carbonaceous material and water to perform a hydrothermal carbonization reaction to obtain hydrated carbon;

[0041] (2) Mix selenium and hydrazine hydrate solution to perform oxidation-reduction reaction to obtain selenium anion solution;

[0042] (3) The hydrated carbon, selenium anion solution, ammonium molybdate and organic solvent are mixed, and a solvothermal reaction is carried out to obtain a hydrated carbon / amorphous molybdenum selenide composite material; the temperature of the solvothermal reaction is not less than 140 ℃;

[0043] The steps (1) and (2) have no time sequence.

[0044] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0045] The...

Example Embodiment

[0067] Example 1

[0068] Crush 1g of discarded cigarette butts to a size of 0.15~0.27mm, mix with 15mL of water, hydrothermally carbonize at 220℃ for 4h, then centrifuge at 10000r / min for 10min, wash the solid components at 110℃ Dry for 15h to obtain hydrated charcoal.

[0069] Under room temperature and stirring conditions of 360 r / min, 0.31 g of selenium powder with a particle size of 45-58 μm and 20 mL of hydrazine hydrate solution (80 wt%) are mixed, and the oxidation reaction is carried out for 12 hours to obtain a selenium anion solution.

[0070] 0.33g of ammonium molybdate tetrahydrate was added to 20mL of ethanol, 50mg of hydrated charcoal was added and mixed uniformly, the selenium anion solution was added dropwise and ultrasonically mixed for 60min, then transferred to the reaction kettle for solvothermal reaction at 140°C for 12h, and cooled to After room temperature, centrifuge for 10 minutes at a speed of 10000r / min, wash the obtained solid components with ethanol 3 t...

Example Embodiment

[0071] Example 2

[0072] The hydrated carbon / amorphous molybdenum selenide composite material was prepared according to the method of Example 1. The difference from Example 1 is that the temperature of the solvothermal reaction was 160°C to obtain the hydrated carbon / amorphous molybdenum selenide composite material (abbreviation MoSe x / hydrochar-160).

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Abstract

The invention provides a hydrated carbon/amorphous molybdenum poly-selenide composite material as well as a preparation method and application thereof, and belongs to the technical field of palladiumadsorbents. The provided hydrated carbon/amorphous molybdenum poly-selenide composite material comprises hydrated carbon and amorphous molybdenum poly-selenide dispersed on the surface of the hydratedcarbon, wherein an oxygen-containing functional group is arranged on the surface of the hydrated carbon; the molar ratio of selenium to molybdenum in the amorphous molybdenum poly-selenide is (2.3-2.6): 1. In the hydrated carbon/amorphous molybdenum poly-selenide composite material, amorphous molybdenum poly-selenide has more effective selenium sites than crystalline molybdenum selenide, and theremoval effect on palladium ions is better. The oxygen-containing functional group on the surface of the hydrated carbon provides more growth sites for amorphous molybdenum poly-selenide; due to the existence of the hydrated carbon carrier, the amorphous molybdenum poly-selenide is good in dispersity and cannot be agglomerated, more effective selenium sites are exposed, and the palladium ion adsorption effect of the hydrated carbon/amorphous molybdenum poly-selenide composite material is further improved.

Description

technical field [0001] The invention relates to the technical field of palladium adsorbent, in particular to a hydrated carbon / amorphous molybdenum polyselenide composite material and its preparation method and application. Background technique [0002] Palladium is an indispensable key material in high-tech fields such as aerospace, aviation, navigation, weapons and nuclear energy, as well as automobile manufacturing. It is also often used as a catalyst for organic synthesis, especially in the manufacture of chemical products such as pesticides, pharmaceuticals, spices, and dyes. , Palladium catalysts can be used in a wide range of reactions such as the hydrogenation of olefins, ketones, aldehydes, etc., and the hydrogenation decomposition of halogen compounds and allyl compounds; in addition, palladium is also widely used in the field of electroplating. Palladium has a low content in the earth's crust and is expensive. Therefore, from the perspective of palladium reuse and...

Claims

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Application Information

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IPC IPC(8): C01B32/05C01B19/00B01J20/20C02F1/28B01J20/30C02F101/20
CPCC01B32/05C01B19/007B01J20/20B01J20/0266B01J20/0218C02F1/283C01P2002/72C01P2002/80C01P2002/82C01P2004/03C02F2101/20
Inventor 罗旭彪裴俊俊邵鹏辉杨利明石慧喻恺
Owner NANCHANG HANGKONG UNIVERSITY
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