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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 addition, molybdenum selenide is easy to agglomerate, so that the crystalline molybdenum diselenide cannot be completely exposed. Its adsorption site makes its adsorption effect on palladium not ideal

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

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preparation example Construction

[0039] The present invention provides the preparation method of hydrated carbon / amorphous molybdenum polyselenide composite material described in the above technical scheme, comprising the following steps:

[0040] (1) Mix carbonaceous material and water, carry out hydrothermal carbonization reaction, obtain hydrated carbon;

[0041] (2) Selenium and hydrazine hydrate solution are mixed, carry out redox reaction, obtain selenium anion solution;

[0042] (3) Mix the hydrated carbon, selenium anion solution, ammonium molybdate and organic solvent, and carry out solvothermal reaction to obtain hydrated carbon / amorphous molybdenum polyselenide composite material; the temperature of the solvothermal reaction is not lower than 140 ℃;

[0043] The steps (1) and (2) are not in chronological order.

[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 invention...

Embodiment 1

[0068] Crush 1g of waste cigarette butts to a size of 0.15-0.27mm and mix it with 15mL of water, hydrothermally carbonize at 220°C for 4h, then centrifuge at a speed of 10,000r / min for 10min, wash the obtained solid components with water, and place them at 110°C Dry for 15 hours to obtain hydrated carbon.

[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 %) were mixed, and then oxidized for 12 hours to obtain a selenium anion solution.

[0070] Add 0.33g of ammonium molybdate tetrahydrate into 20mL of ethanol, add 50mg of carbon hydrate and mix evenly, add the selenium anion solution dropwise and ultrasonically mix for 60min, transfer to the reaction kettle for solvothermal reaction at 140°C for 12h, and cool to After room temperature, centrifuge at a speed of 10000r / min for 10min, wash the obtained solid component with ethanol 3 times, wash with water ...

Embodiment 2

[0072]Prepare hydrated carbon / amorphous molybdenum polyselenide composite material according to the method of embodiment 1, and the difference with embodiment 1 is, the temperature of solvothermal reaction is 160 ℃, obtains hydrated carbon / amorphous molybdenum polyselenide composite material (abbreviation for 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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