Ultrathin two-dimensional trimanganese tetraoxide and two-dimensional ni-mn LDH nanocomposite material and its preparation method and application

A nanocomposite material and nanomaterial technology, applied in the field of nanomaterial preparation, can solve the problems of low reduction activity and easy agglomeration of 2D nanosheets, and achieve the effect of promoting electron transfer, simple and easy access to raw materials and equipment, and avoiding agglomeration

Active Publication Date: 2022-04-08
FUZHOU UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a green synthesis of 2D / 2D nanocomposites with simple process and high reduction activity for the existing 2D / 2D nanocomposite preparation methods, 2D nanosheets are easy to agglomerate, and have low reduction activity. method

Method used

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  • Ultrathin two-dimensional trimanganese tetraoxide and two-dimensional ni-mn LDH nanocomposite material and its preparation method and application
  • Ultrathin two-dimensional trimanganese tetraoxide and two-dimensional ni-mn LDH nanocomposite material and its preparation method and application
  • Ultrathin two-dimensional trimanganese tetraoxide and two-dimensional ni-mn LDH nanocomposite material and its preparation method and application

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Embodiment 1

[0040] mn 3 o 4 / Ni-Mn LDH nanocomposite preparation:

[0041] (1) Weigh 1 mmol manganese formate Mn(HCOO) with an electronic balance 2 and 0.3 mmol nickel chloride hexahydrate NiCl 2 ·6H 2 O, measure 60ml methanol with a graduated cylinder, and mix the three;

[0042] (2) Then the mixture was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, and reacted at a constant temperature of 180 °C for 18 h, and naturally cooled to room temperature after the reaction;

[0043] (3) Centrifuge the sample with a centrifuge to obtain a solid powder at a rotational speed of 6000 rpm; wash with ethanol and deionized water three times;

[0044] (4) 2D Mn was obtained by freeze-drying overnight until the water evaporated completely 3 o 4 / 2D Ni-Mn LDH nanocomposites. figure 2 It can be seen that the leaf shape is 2D Mn 3 o 4 , the framework of flower-like microspheres is 2D Ni-Mn LDH nanosheets, 2DMn 3 o 4 The size is uniform and highly dispersed on the 2D ...

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Abstract

The present invention discloses one-step synthesis of ultrathin two-dimensional (2D) Mn 3 o 4 and the ordered self-assembly method of two-dimensional layered double hydroxide (LDH) nanomaterials, 2D trimanganese tetraoxide (Mn 3 o 4 ) nanocomposites dispersed on 2D Ni‑Mn LDH and self-assembled into microflowers (2D Mn 3 o 4 / 2D Ni‑Mn LDH), where 2D Mn 3 o 4 The thickness of 2D Ni-Mn LDH is between 3.75-4 nm, and the thickness of 2D Ni-Mn LDH is about 2 nm; the diameter of the combined microflowers is about 6 um. The 2D / 2D nanocomposite material prepared by the invention can efficiently and selectively photocatalyze the reduction of carbon dioxide into carbon monoxide under the condition of a photosensitizer. The preparation process of the invention is simple, the cycle is short, the cost is low, large-scale industrial production is possible, and the invention has good economic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to an ultra-thin two-dimensional Mn based on Ni-Mn LDH nanomaterials 3 o 4 and two-dimensional Ni-Mn LDH nanocomposites and their preparation methods and applications. Background technique [0002] Two-dimensional (2D) ultrathin LDH nanomaterials have high specific surface area, more exposed active sites and efficient electron transfer ability due to their atomic-scale thickness (<5 nm) and large aspect ratio, It is an ideal catalytic material. Due to the high surface energy of two-dimensional ultrathin nanomaterials, they are prone to agglomeration and wrinkling, causing further reduction and reduction of exposed surface area and active sites, resulting in the reduction and instability of their catalytic activity. At present, in the process of synthesizing two-dimensional ultra-thin nanomaterials and inhibiting their agglomeration, it is often necessary to ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02C01G53/00B01J23/889B01J37/10C01B32/40B82Y40/00B82Y30/00
CPCC01G45/02C01G53/006B01J23/8892B01J35/004B01J37/10C01B32/40B82Y40/00B82Y30/00C01P2004/32C01P2004/45C01P2004/64C01P2004/62C01P2004/61C01P2004/24C01P2004/80
Inventor 庄赞勇周林鑫庄国鑫于岩
Owner FUZHOU UNIV
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