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Cobalt metal organic framework material, preparation method and applications thereof

A technology of organic framework and cobalt metal, applied in the field of photocatalytic materials, can solve the problems of serious charge recombination on the electrode surface, high overpotential, slow water oxidation kinetics, etc., and achieve stable photocatalytic effect, high process controllability, commercial Apply promising effects

Inactive Publication Date: 2020-01-07
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the materials with the most application potential are hematite and bismuth vanadate, which have suitable bandgap width and energy band structure, easy preparation, low cost, and good stability, but both have high overpotential and water oxidation kinetics The learning is slow, and the charge recombination on the electrode surface is serious

Method used

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  • Cobalt metal organic framework material, preparation method and applications thereof
  • Cobalt metal organic framework material, preparation method and applications thereof
  • Cobalt metal organic framework material, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1: Preparation of photoanodes with cobalt metal organic framework materials with different coverages to modify photoelectric materials, for testing the influence of cobalt metal organic framework materials with different coverages on the modification effect of photoelectric materials.

[0034] (1) Cobalt nitrate hexahydrate and 2,6-naphthalene dicarboxylate dipotassium salt are mixed in a molar ratio of 1:1, both of which are made into six solutions with a concentration of 40mM / L;

[0035] (2) Add six parts of the mixed solution in step (1) to six beakers where conductive glass / titanium-doped hematite has been placed respectively. The size of a single piece of conductive glass is 1cm×2.5cm×1mm, and the volume of the solution is 40mL, then all sealed;

[0036] (3) Heat the reaction solution in step (2) to 60°C at a heating rate of 5°C / min, react at a constant temperature for 0.5h, 1.0h, 1.5h, 2.0h, 2.5h, and 3.0h, and finally cool down to At room temperature, de...

Embodiment 2

[0038] Example 2: Preparation of photoanodes of different optoelectronic materials modified by cobalt metal organic framework materials, used to illustrate the universality of cobalt metal organic framework materials modification.

[0039] (1) Cobalt nitrate hexahydrate and 2,6-naphthalene dicarboxylate dipotassium salt are mixed in a molar ratio of 1:1, both of which are made into three solutions of concentration 40mM / L;

[0040] (2) Add the three mixed solutions in step (1) to three beakers that have placed conductive glass / hematite, conductive glass / titanium dioxide, conductive glass / bismuth vanadate, and the size of a single piece of conductive glass is 1cm ×2.5 cm×1mm, the solution volume is 40mL, and then all are sealed;

[0041](3) The reaction solution in step (2) was heated up to 60°C at a heating rate of 5°C / min, reacted at a constant temperature for 2.0 hours, and finally cooled down to room temperature by natural cooling to obtain different optoelectronic materials...

Embodiment 3

[0043] Example 3: Preparation of cobalt metal organic framework materials from different sources of divalent cobalt ions, used to illustrate the versatility of the precursors of cobalt metal organic framework materials.

[0044] (1) Mix cobalt nitrate, cobalt acetate, cobalt sulfate, cobalt carbonate, and cobalt oxalate with dipotassium 2,6-naphthalene dicarboxylate in a molar ratio of 1:1, and both are formulated into five parts with a concentration of 40mM / L solution;

[0045] (2) The reaction solution in step (1) was heated up to 60°C at a heating rate of 5°C / min, subjected to a constant temperature reaction for 12.0 hours, and finally cooled to room temperature by natural cooling, and centrifuged to obtain a cobalt metal organic framework material.

[0046] (3) Dry the cobalt metal organic framework material obtained in step (2) in an oven at 40°C.

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Abstract

The invention relates to a cobalt metal organic framework material, a preparation method and applications thereof. The preparation method comprises: placing an electric-conducting glass / photoelectricmaterial as a substrate materialinto a beaker, adding a mixed solution of a divalent cobalt metal salt and an organic ligand, sealing, carrying out a heating reaction, cooling, taking out the electric-conducting glass sheet, washing, and drying to obtain the photoelectric material / cobalt metal organic framework material composite photoelectrode, wherein the prepared metal organic framework material can be used for modifying a photoelectric material. According to the invention, the preparation method is scientific and reasonable in design, simple and controllable in process, high in efficiency,low in cost, suitable for large-scale production and wide in commercial application prospect; the product has extremely high photoelectrocatalytic activity on the oxidation reaction of water in an alkaline solution, the photoelectrocatalytic effect is continuous and stable, and the product has great theoretical and practical significance.

Description

technical field [0001] The invention belongs to the technical field of photoelectric catalysis materials, and in particular relates to a cobalt metal organic framework material for modifying photoelectric materials, a preparation method and an application thereof. Background technique [0002] With the growth of human energy demand and the continuous aggravation of environmental pollution, the development and utilization of renewable energy has become an inevitable choice for future development. Water covers more than 70% of the earth's surface, and the sun's lifespan is about 5-7 billion years. Therefore, both solar energy and water can be regarded as inexhaustible and sustainable clean energy. The primary key scientific and technical issue of hydrogen energy utilization technology is to develop efficient, clean and low-cost hydrogen production technology. At present, a large amount of hydrogen is produced by reforming natural gas, which has the advantage of low cost and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00H01G9/20H01G9/042
CPCC08G83/008H01G9/20
Inventor 谢佳乐伍烽锴杨萍萍黄跃龙
Owner SOUTHWEST PETROLEUM UNIV
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