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Nickel-based layered double hydroxide nanosheet as well as room-temperature rapid green preparation method and application thereof

A technology of hydroxides and nanosheets, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of many harmful by-products, high temperature and pressure, preparation Long time and other issues, to achieve the effect of abundant sources, lower production costs, and simple preparation process

Active Publication Date: 2020-05-05
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the technical problems that the traditional hydrothermal or solvothermal preparation method needs higher temperature and pressure, and the preparation time is long, the process is complicated, and there are many harmful by-products, a nickel-based layered double metal hydroxide is provided. Object nanosheet and its rapid green preparation method and application at room temperature

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  • Nickel-based layered double hydroxide nanosheet as well as room-temperature rapid green preparation method and application thereof
  • Nickel-based layered double hydroxide nanosheet as well as room-temperature rapid green preparation method and application thereof
  • Nickel-based layered double hydroxide nanosheet as well as room-temperature rapid green preparation method and application thereof

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specific Embodiment approach 1

[0033] Specific Embodiment 1: A nickel-based layered double hydroxide nanosheet in this embodiment is a NiFe-LDH nanosheet with a two-dimensional sheet structure.

[0034] The room-temperature rapid green method for preparing the above-mentioned NiFe-LDH nanosheets is carried out as follows:

[0035] 1. Preparation of FeCl 3 Solution: 2.5mmol of FeCl 3 ·6H 2 O was ultrasonically dispersed in 30 mL deionized water, and the FeCl 3 Dissolved completely to obtain FeCl 3 solution;

[0036] 2. Immersion: immerse foamed nickel (2cm×5cm) in the FeCl obtained in step 1 3 In the solution, ultrasonic infiltration for 1 min;

[0037] 3. Air aging: place the nickel foam soaked in step 2 at room temperature for air aging, and the air aging time is 15min;

[0038]4. Post-processing: After cleaning, place it at room temperature and dry naturally to obtain NiFe-LDH nanosheets. The diameter of the layered double metal hydroxide on the obtained NiFe-LDH nanosheets is 600nm-700nm.

[0039...

specific Embodiment approach 2

[0040] Embodiment 2: A nickel-based layered double hydroxide nanosheet in this embodiment is a NiZr-LDH nanosheet with a two-dimensional sheet structure.

[0041] The room-temperature rapid green method for preparing the above-mentioned NiZr-LDH nanosheets is carried out as follows:

[0042] 1. Preparation of ZrCl 4 Solution: 0.5mmol of ZrCl 4 Ultrasonic dispersion in 30mL deionized water, to be ZrCl 4 Completely dissolved to give ZrCl 4 solution;

[0043] 2. Immersion: immerse foamed nickel (2cm×5cm) in the ZrCl obtained in step 1 4 In the solution, ultrasonic infiltration for 1min;

[0044] 3. Air aging: place the nickel foam soaked in step 2 at room temperature for air aging, and the air aging time is 30min;

[0045] 4. Post-treatment: After cleaning, place it at room temperature and dry naturally to obtain NiZr-LDH nanosheets. The diameter of the layered double metal hydroxide on the obtained NiZr-LDH nanosheets is 300nm-400nm.

[0046] The NiZr-LDH nanosheet of thi...

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Abstract

The invention relates to a nickel-based layered double hydroxide nanosheet as well as a room-temperature rapid green preparation method and application thereof. The invention belongs to the field of electrocatalytic functional materials. The technical problems that a traditional hydrothermal or solvothermal preparation method needs high temperature and pressure, the preparation time is long, the process is complex, and meanwhile many harmful byproducts are generated are solved. The method comprises the following steps: infiltrating foamed nickel in a metal salt solution, and aging in air to obtain the nickel-based layered double hydroxide nanosheet with a two-dimensional lamellar structure. The nanosheet is applied as an electrode plate in the field of electrocatalytic functional materials. The method is short in reaction time; the method is simple in process, controllable in condition and high in universality, can be used for preparing various nickel-based layered double hydroxide nanosheets including nickel-zirconium, nickel-vanadium, ferronickel, nickel-cobalt and the like, and is suitable for industrial large-scale production, and the obtained nanosheets have excellent electro-catalytic performance, multiple catalytic active sites and wide application prospects in industrial production of hydrogen production through water electrolysis.

Description

technical field [0001] The invention belongs to the field of electrocatalytic functional materials, and in particular relates to a nickel-based layered double metal hydroxide nanosheet and a rapid green preparation method and application thereof at room temperature. Background technique [0002] The energy crisis in today's world mainly comes from the utilization of non-renewable energy mainly based on fossil energy. Due to the high carbon, sulfur and other harmful substances emitted by the burning of fossil energy, environmental problems such as air pollution and greenhouse effect have been exacerbated. As a clean, efficient, and abundant new energy, hydrogen energy has great potential to replace fossil energy. Hydrogen production by electrolysis of water is one of the hydrogen production methods that people are most concerned about. However, in order to pursue the small overpotential of hydrogen evolution and oxygen evolution in industry, most of the electrode materials us...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/10B01J35/02C25B11/06C25B1/04
CPCB01J23/755C25B11/04C25B1/04B01J35/00B01J35/30B01J35/33B01J35/61Y02E60/36
Inventor 郑晓航刘居庆林景煌杨雅倩亓钧雷隋解和蔡伟
Owner HARBIN INST OF TECH
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