Ni-Co-Fe three-component composite nanometer metal oxide, preparation method thereof and application thereof

A nano-metal, ternary composite technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as being easily poisoned by chlorine, and achieve easy recycling, The preparation method is simple and easy, and the effect of low reaction temperature

Active Publication Date: 2015-09-09
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, most catalytic materials are easily poisoned by chlorine in the degradation of chlorinated aromatics, and it is challenging to prepare composite metal oxide nanomaterials resistant to chlorine poisoning, and there is no literature report on ternary iron-based composite nano-metal oxides. Study on Degradation of Chlorinated Aromatic Hydrocarbons

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  • Ni-Co-Fe three-component composite nanometer metal oxide, preparation method thereof and application thereof
  • Ni-Co-Fe three-component composite nanometer metal oxide, preparation method thereof and application thereof
  • Ni-Co-Fe three-component composite nanometer metal oxide, preparation method thereof and application thereof

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preparation example Construction

[0029] The method for preparing the above-mentioned nickel-cobalt-iron ternary composite nano metal oxide provided by the present invention, its main steps are:

[0030] 1) Dissolve nickel salt, cobalt salt and iron salt in the corresponding amount of aqueous solution, add a certain amount of urea (urea) at the same time, after stirring evenly, transfer the solution to a hydrothermal reaction kettle for a period of time, and wait for the solution to cool to At room temperature, the precipitate was collected; the precipitate was washed with distilled water and centrifuged, and dried in an oven to obtain the precursor of nickel-cobalt-iron ternary composite nano-metal oxide;

[0031] In step 1: the molar ratio of nickel, cobalt and iron is 0.5-2:0.5-2:1-4. Nickel salt, cobalt salt and iron salt are all one of nitrate, sulfate, chloride salt, etc., add 1- 8g of urea, after stirring evenly, transfer the solution to a 25-100mL stainless steel reactor, and react at 150-250°C for 6-...

Embodiment 1

[0038] Take Ni(NO 3 ) 2 ·6H 2 O 0.1454g, Co(NO 3 ) 2 ·6H 2O 0.1455g, Fe(NO 3 ) 3 9H 2 O0.808g, 2.0g of urea and 40mL of distilled water were placed in a 100mL beaker, stirred electromagnetically at room temperature to become a transparent liquid, and transferred to a 50mL stainless steel reaction kettle. The reactor was placed in a muffle furnace and reacted at 180°C for 10h. After the reaction was completed, it was cooled to room temperature, and the black precipitate was collected. The precipitate is washed and dried at 100° C. for several hours to obtain a precursor of black nickel-cobalt-iron ternary composite nano metal oxide. The precursor was fired at 350°C for 3 hours in a tube furnace with air flow at ~60mL / min, and the target product was a black powder of nickel-cobalt-iron composite oxide. The results of SEM, EDX and magnetic characterization are shown in Figure 1. Figure 1a The SEM characterization results show that the prepared material is a spherical na...

Embodiment 2

[0040] The product of embodiment 1 is taken by weighing 50mg and in quartz tube, the generation concentration of monochlorobiphenyl (CB 1) is 40ppm, and reaction atmosphere is 20vol.%O of 40mL / min 2 / N 2 The mixed gas (gas standard substance) and 40mL / min N 2 (gas standard substance). Firstly, it was adsorbed at 100°C for 1 h. After the adsorption was saturated, the reaction temperature was gradually increased to 350°C at intervals of 50°C. Each temperature point was stable for 0.5 h. The concentration of CB 1 before and after the reaction was measured online by gas chromatography. When the reaction temperature rose to 350°C and remained stable for 0.5h, the temperature was lowered to 100°C, and then gradually raised to 350°C. Test its degradation activity to CB 1 continuously on the same material in such a cycle for 5 times, the results are as follows: Figure 2a shown. It can be found that in the early stage of the reaction, the nickel-cobalt-iron ternary composite nano-...

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Abstract

The invention provides a Ni-Co-Fe three-component composite nanometer metal oxide. The phase of the metal oxide is in the form of a composite oxide containing three metal components, namely Ni, Co and Fe, and the three metal components are uniformly compounded to form a spheroidic nano metal oxide. The feeding molar ratio of Ni, Co and Fe is 0.5-2:0.5-2:1-4. The invention also discloses a method for preparing the Ni-Co-Fe three-component composite nanometer metal oxide. The Ni-Co-Fe three-component composite nanometer metal oxide can efficiently degrade chlorine-substituted aromatic hydrocarbons and is excellent in anti-chlorine toxicosis.

Description

technical field [0001] The invention relates to a nickel-cobalt-iron ternary composite nanometer metal oxide for degrading chlorinated aromatic hydrocarbons. [0002] The present invention also relates to a preparation method of the nickel-cobalt-iron ternary composite nano metal oxide. [0003] The present invention also relates to the application of the nickel-cobalt-iron ternary composite nanometer metal oxide in degrading chlorinated aromatic hydrocarbons. Background technique [0004] Chlorinated aromatic hydrocarbons are a class of organic substances with long-term persistence, bioaccumulation, high toxicity, semi-volatility, lipophilicity and hydrophobicity. Once they enter the natural environment, they are difficult to degrade and will accumulate with the biological chain. It has carcinogenic, teratogenic and mutagenic effects on humans. Therefore, the threats it poses to human health and the ecological environment are widely valued by governments, environmental or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/02B01J37/08A62D3/30A62D101/22
Inventor 苏贵金黄林艳芦会杰李倩倩杨帆郑明辉
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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