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

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...

Examples

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...

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...

Examples

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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