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Preparation method of nickel-doped europium hexaboride

A technology of hexaboride and diborane, which is applied in the field of nanomaterial preparation, can solve the problem of HCHO sensing performance, etc.

Inactive Publication Date: 2019-07-12
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

The obvious question is: is it possible to prepare Ni-Eu-B alloys? Does Ni doping benefit the sensing of HCHO at room temperature? These questions prompted us to experimentally determine the nickel-doped EuB 6 Can it be prepared successfully? What is the HCHO sensing performance of nickel-doped europium hexaboride at room temperature?

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  • Preparation method of nickel-doped europium hexaboride
  • Preparation method of nickel-doped europium hexaboride
  • Preparation method of nickel-doped europium hexaboride

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Embodiment 1

[0042] In order to achieve the above purpose, the specific preparation steps of nickel-doped europium hexaboride nanomaterials are as follows:

[0043] 1) Under an atmosphere of argon, in the presence of [BMIM][BF 4 ] into the plasma reactor with EuCl 3 and NiCl 2 ·6H 2 O, while stirring continuously;

[0044] 2) Then, add sodium phosphite and diborane;

[0045] 3) The reaction is in an electric field of 500V·cm -1 40min under the plasma;

[0046] 4) After the reaction, the prepared samples were washed with deionized water, and then washed three times with absolute ethanol; finally, the samples were dried at 60°C; in order to synthesize samples with different Ni doping amounts, we changed the total amount of 10mmol EuCl 3 and NiCl 2 ·6H 2 O molar ratio, and then repeat the above experimental process.

[0047] [BMIM][BF in step (1) 4 ] is 20mL;

[0048] EuCl in step (1) 3 The amount of is 9mmol;

[0049] NiCl in step (1) 2 ·6H 2 The amount of O is 1 mmol;

[00...

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Abstract

The invention discloses a preparation method of a nickel-doped europium hexaboride nanomaterial. An amorphous Eu0.9Ni0.1B6 nano particle with irregular morphology is successfully prepared by a diborane coreduction method in the presence of phosphite ions (PO33-) in a liquid plasma field, and an average particle size of the nano particle is 6.5nm. Gas response / recovery time, as well as a limit of detection of EuB6 for formaldehyde steam, and moisture resistance are optimized by Ni doping. The limit of detection of the material is superior to a detection result of any formerly reported formaldehyde (HCHO) sensing material at a room temperature. Eu enriches more electrons due to introduction of Ni, and the electrons are transferred to O in formaldehyde (HCHO) from Eu0.9Ni0.1B6 more easily. Anickel-doped europium hexaboride sensor has good sensing performance, and a foundation is laid for research and development of a formaldehyde gas detection sensor at the room temperature. The materialhas wide application prospects in the technical field of formaldehyde gas monitoring at the room temperature.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method of nickel-doped europium hexaboride nanomaterials. Background technique [0002] In recent years, formaldehyde (HCHO) pollution in indoor air has become a research hotspot. Wallpapers, furniture, wood-based panels, synthetic textile decoration materials, and various adhesives and coatings can gradually release formaldehyde at room temperature. Long-term exposure to low concentrations of HCHO may cause gene mutation and carcinogenesis. Therefore, it is an urgent need to develop a gas sensor for monitoring indoor HCHO levels at room temperature to control environmental pollution and protect human health. [0003] So far, many materials have been reported for HCHO gas sensing at room temperature, including In 2 o 3 / MoS 2 Thin films, polyethyleneimine / single-walled carbon nanotubes (SWCNTs), EuB 6 Nanoparticles, r-GO / SnO 2 Thin films, ZIF-8 / polyoxom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/04B82Y40/00
CPCB82Y40/00C01B35/04C01P2002/72C01P2002/85C01P2004/04C01P2004/64
Inventor 童东革向德力侯淑梅
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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