Synthesis method of ZIF-67 derived CoO

A ZIF-67, 2·6H2O technology, applied in the direction of cobalt oxide/cobalt hydroxide, etc., to achieve the effect of good stability and repeatability, strong operability and practicability, and high repetition rate

Inactive Publication Date: 2020-08-21
WENZHOU UNIVERSITY +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the method of preparing three-dimensional and uniform CoO has yet to be developed, and it is still a great challenge to prepare three-dimensional CoO by simple, reproducible, and low-cost synthetic methods.

Method used

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  • Synthesis method of ZIF-67 derived CoO
  • Synthesis method of ZIF-67 derived CoO
  • Synthesis method of ZIF-67 derived CoO

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Embodiment Construction

[0017] The present invention will be further described in detail below by means of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0018] The invention discloses a method for preparing CoO microparticles. The method takes ZIF-67 as a template and adopts two-step chemical vapor deposition (CVD) to obtain polydisperse Co 3 o 4 , and then coated with PVP, and annealed to obtain CoO microparticles with shape and pore size retention; in other words, the present invention is the first to prepare CoO microparticles derived from metal-organic frameworks with shape retention.

[0019] The preparation method of CoO microparticles according to the present invention comprises the following steps:

[0020] (1) if figure 1 Shown, the schematic flow chart of the present invention. Will Co(NO 3 ) 2 ·6H 2 O and 2-methylimidazole were dissolved in methanol respectively, stirred at 800rpm / s for 5min, and th...

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Abstract

The invention discloses a synthesis method for obtaining CoO micron particles with maintained morphology through a two-step reaction by taking ZIF-67 as a template. The method comprises the followingsteps: (1) respectively dissolving Co (NO3) 2.6 H2O and 2-methylimidazole in 100mL of methanol, performing stirring and combining metal and ligand solutions, stirring for 30 minutes, and standing for24 hours to obtain ZIF-67 particles; (2) raising the temperature to 350 DEG C at the speed of 10 DEG C / min in an air atmosphere, carrying out chemical vapor deposition (CVD) tubular furnace calcination on the ZIF-67 particles for 2 hours to obtain Co3O4 particles, and carrying out PVP coating (the molar ratio of Co3O4 to PVP-1 is 1: 1.4, ultrasonic treatment is conducted, the Co3O4 particles are soaked in ethyl alcohol for 18h, and then direct centrifugal drying is conducted); and (3) raising the temperature to 800 DEG C at a speed of 10 DEG C / min in an Ar / H2 atmosphere, calcining the Co3O4 particles in a CVD tubular furnace, and keeping for 2 hours to obtain CoO particles. According to the invention, CoO with maintained morphology derived from a metal organic framework is prepared for thefirst time, the required materials are cheap, the preparation process is simple, the stability is good, the repetition rate is high, and the CoO has potential application value and strong practicability in the fields of electrocatalysis and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis of micro-nano materials, in particular to a method for synthesizing CoO microparticles derived from a metal-organic framework structure to obtain CoO microparticles with uniform and polydisperse shapes. Background technique [0002] CoO is a material with unique electrical, optoelectronic, and magnetic properties. It has a wide range of applications in optoelectronic materials and devices, and these applications mainly depend on the morphology and specific surface area of ​​cobaltous oxide. Therefore, in recent years, the preparation and properties of CoO with different morphologies have attracted much attention. There are many methods for controlling the morphology of CoO, such as surfactant covering method, soft and hard template method, self-assembly method, spin nanoribbon or nanosheet method. At present, one-dimensional CoO micro-nanostructures with various shapes have been synthesized, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04
CPCC01G51/04C01P2004/62C01P2006/12C01P2004/03C01P2002/72C01P2006/17
Inventor 钱金杰钟丽胡悦李启彭
Owner WENZHOU UNIVERSITY
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