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Method for preparing CuCoO2 nanocrystal material based on MOFs material at low temperature

A nanocrystalline material, low temperature technology, applied in the field of synthesis and preparation of nanoscale delafossite structure CuCoO2 crystal material, can solve the problems of restricting the application research of optoelectronic devices, the activity of electrolyzed water needs to be improved, and the crystal material has not been found yet, so as to promote the application The effect of development, easy control of process parameters and low price

Active Publication Date: 2019-05-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But due to CuCoO 2 The size of the crystal material is larger, the specific surface area is smaller, resulting in fewer active sites, and its electrolytic water activity still needs to be improved
In addition, due to the nanoscale p-type semiconductor ABO 2 Material synthesis preparation is very difficult, ABO 2 The lack of nanocrystalline materials seriously restricts the application research of this series of materials in optoelectronic devices
Currently only CuGaO 2 , CuCrO 2 , CuAlO 2 , CuMnO 2 , AgCrO 2 and other related reports on several nanocrystalline materials, but there is no report on the synthesis of nano-sized CuCoO by hydrothermal method. 2 Research Reports on Crystalline Materials

Method used

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  • Method for preparing CuCoO2 nanocrystal material based on MOFs material at low temperature
  • Method for preparing CuCoO2 nanocrystal material based on MOFs material at low temperature
  • Method for preparing CuCoO2 nanocrystal material based on MOFs material at low temperature

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Effect test

Embodiment 1

[0035] A low-temperature preparation of CuCoO with nanoscale delafossite structure 2 A method for crystal materials, comprising the steps of:

[0036] First prepare the reaction precursor (or hydrothermal reaction precursor): the Co MOFs crystal material (ZIF-67) and Cu(NO 3 ) 2 Add it into the reaction solution according to the mass ratio of 1:1 (the reaction solution is a mixed solution of deionized water and absolute ethanol, and the volume ratio of deionized water and absolute ethanol is 1:2.5), stir in a magnetic stirrer for 10 to 15 minutes to dissolve Finally, add NaOH 10 times the mass of ZIF-67 as a mineralizer, and continue stirring for 10 to 15 minutes until completely dissolved to obtain a reaction precursor.

[0037] Transfer the above reaction precursor to a hydrothermal reaction kettle (generally polytetrafluoroethylene), control the reaction solution (the reaction solution in the hydrothermal reaction kettle is a mixed solution of deionized water and absolute...

Embodiment 2

[0040] A low-temperature preparation of CuCoO with nanoscale delafossite structure 2 A method for crystal materials, comprising the steps of:

[0041] First prepare the reaction precursor (or hydrothermal reaction precursor): combine ZIF-67 and Cu(NO 3 ) 2 Add it into the reaction solution according to the mass ratio of 1:1.2 (the reaction solution is a mixed solution of deionized water and absolute ethanol, and the volume ratio of deionized water and absolute ethanol is 1:2.5), fully stir the solution with a magnetic stirrer for 10-15 After decomposing for 1 minute, add NaOH 50 times the mass of ZIF-67 as a mineralizer, and continue stirring for 10-15 minutes until completely dissolved to obtain a reaction precursor.

[0042] Transfer the above reaction precursor to a hydrothermal reaction kettle (generally polytetrafluoroethylene), control the reaction solution (the reaction solution in the hydrothermal reaction kettle is a mixed solution of deionized water and absolute et...

Embodiment 3

[0045] A low-temperature preparation of CuCoO with nanoscale delafossite structure 2 A method for crystal materials, comprising the steps of:

[0046] First prepare the reaction precursor (or hydrothermal reaction precursor): the Co-based MOF material ZIF-67 and Cu(NO 3 ) 2 Add it into the reaction solution according to the mass ratio of 1:1.2 (the reaction solution is a mixed solution of deionized water and absolute ethanol, and the volume ratio of deionized water and absolute ethanol is 1:2.5), and stir fully on a magnetic stirrer for 10 to 15 minutes After dissolving, add Cu(NO 3 ) 2 10 times the mass of NaOH is used as a mineralizer, and the stirring is continued for 10 to 15 minutes until it is completely dissolved to obtain a reaction precursor.

[0047] Transfer the above reaction precursor to a hydrothermal reaction kettle (generally polytetrafluoroethylene), control the reaction solution (the reaction solution in the hydrothermal reaction kettle is a mixed solutio...

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Abstract

The invention relates to a method for synthesizing a nano-sized CuCoO2 crystal material according to a hydrothermal method at relatively low temperature. A method for preparing a CuCoO2 nanocrystal material adopting a delafossite structure based on an MOFs material at low temperature is characterized by comprising the following steps: preparing a reaction precursor by using a metal organic framework material (Metal Organic Frameworks, the MOFs material) as a starting reactant, putting the reaction precursor into a hydrothermal reaction kettle, performing a hydrothermal reaction at 100-140 DEGC for 24-48 hours, then centrifugally cleaning a reaction product to obtain a precipitate, and drying the precipitate to obtain the CuCoO2 nanocrystal material adopting the delafossite structure and having the size of the 50-200 nm. The operation is simple, technological parameters are easy to control, and the method is pollution-free and high in yield and has the characteristics of low temperature and rapidness; the CuCoO2 nanocrystal material can be widely applied to various novel photoelectric functional devices.

Description

technical field [0001] The present invention relates to the field of synthesis and preparation of MOFs materials (Metal Organic Frameworks, metal-organic framework materials) and nanomaterials, in particular, the synthesis and preparation of nano-scale delafossite structure CuCoO by hydrothermal method at a relatively low reaction temperature 2 methods for crystalline materials. Background technique [0002] Delafossite type oxide (ABO 2 , A=Cu, Ag, etc., B=Al, Ga, Cr, Co or La, etc.) is an important class of transition metal oxide materials. Professor Hosono of Tokyo Institute of Technology and others first reported CuAlO on Nature in 1997 2 The p-type conductivity of the film, its conductivity at room temperature is 9.5×10 -2 s cm -1 . CuAlO 2 Inspired by the idea of ​​chemical valence band design, series ABO 2 Structural materials have become the key research focus of scientific researchers. ABO of the delafossite structure 2 Has a hexagonal layered crystal struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00B82Y30/00H01L31/0224C25B1/04C25B11/06B01J23/75
CPCY02E60/36
Inventor 熊德华李宏杜子娟钱津辰张天阳
Owner WUHAN UNIV OF TECH
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