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A kind of large-size bicontinuous porous foamed bismuth and preparation method thereof

A porous foam, bicontinuous technology, applied in the field of nanomaterials and energy storage materials, can solve the problems of many influencing factors, need to be improved, and cumbersome, and achieve the effects of simple process, recyclable raw materials, and wide distribution.

Active Publication Date: 2022-07-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The morphology and structure of bismuth-based photocatalysts have a significant impact on their performance. The reported morphology mainly includes tubular, columnar, flake, and round shapes. Their catalytic performance is better than that of bulk materials, but there is still room for improvement.
At present, the morphology control of bismuth-based photocatalysts is cumbersome and has many influencing factors. With the increase of actual demand, it is urgent to meet the requirements of good catalytic performance, simple production and low cost.

Method used

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  • A kind of large-size bicontinuous porous foamed bismuth and preparation method thereof
  • A kind of large-size bicontinuous porous foamed bismuth and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0037] Embodiment 1: a large-size bicontinuous porous foamed bismuth material, the preparation method comprising the following steps:

[0038] (1) Preparation of lead-bismuth alloy electrode: Weigh 20.31g of metal lead particles (99.9%) and 0.41g of metal tin particles (99.9%), put them into a quartz glass tube, and move them to a resistance furnace to heat to 500 ° C, at this temperature Keep it down for 180 minutes, shake the quartz glass tube every 30 minutes during this time period, so that the metal lead and bismuth are fully mixed evenly, and then the solution is cooled and solidified to form a lead-bismuth alloy. The alloy is cut with a blade or saw blade and then sanded to a thin disc shape with a diameter of 10mm (adjustable size) and a thickness of 1mm. The alloy was ultrasonically cleaned in absolute ethanol for 30 minutes, then rinsed with deionized water, and finally dried to obtain a lead-bismuth alloy electrode.

[0039] (2) Dealloying treatment: Take the lead-...

Embodiment 2

[0041] Embodiment 2: a large-size bicontinuous porous foamed bismuth material, the preparation method comprising the following steps:

[0042] (1) Preparation of lead-bismuth alloy electrodes: Weigh 19.0 g of metal lead particles (99.9%) and 1.67 g of metal tin particles (99.9%), put them into a quartz glass tube, and move them to a resistance furnace to heat to 500 ° C, at this temperature Keep it down for 180 minutes, and shake the quartz glass tube every 30 minutes during this time period to make the metal lead and bismuth fully mix evenly, and then cool and solidify the solution to form a lead-bismuth alloy. The alloy is cut with a blade or saw blade and then sanded to give it a thin disc shape with a diameter of 10mm and a thickness of 1mm. The alloy was ultrasonically cleaned in absolute ethanol for 30 minutes, then rinsed with deionized water, and finally dried to obtain a lead-bismuth alloy electrode.

[0043] (2) Dealloying treatment: Take the lead-bismuth alloy elec...

Embodiment 3

[0045] Embodiment 3: a large-size bicontinuous porous foamed bismuth material, the preparation method comprising the following steps:

[0046] (1) Preparation of lead-bismuth alloy electrodes: Weigh 17.6g of metal lead particles (99.9%) and 3.14g of metal tin particles (99.9%), put them into a quartz glass tube, and move them to a resistance furnace to heat to 500 ℃, at this temperature Keep it down for 180 minutes, and shake the quartz glass tube every 30 minutes during this time period to make the metal lead and bismuth fully mix evenly, and then cool and solidify the solution to form a lead-bismuth alloy. The alloy is cut with a blade or saw blade and then sanded to give it a thin disc shape with a diameter of 10mm and a thickness of 1mm. The alloy was ultrasonically cleaned in absolute ethanol for 30 minutes, then rinsed with deionized water, and finally dried to obtain a lead-bismuth alloy electrode.

[0047] (2) Dealloying treatment: Take the lead-bismuth alloy electrod...

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Abstract

The invention discloses a large-size bicontinuous porous foamed bismuth and a preparation method thereof. The material is composed of a continuous three-dimensional nano-bismuth network structure and continuous three-dimensional pores that are interconnected to form a three-dimensional three-dimensional composite structure of macroscopic size; the preparation method of the material includes the following steps: preparing a lead-bismuth alloy; The dealloying treatment is carried out; the material after the dealloying treatment is cleaned and dried to obtain a bicontinuous porous foamed bismuth material; the preparation method of the invention has simple process, recyclable raw materials and low cost; the obtained bicontinuous porous foamed bismuth material Large specific surface area, two phases are completely continuous, pore distribution is uniform, continuous bismuth network and pore size can be controlled in the range of micrometers and nanometers, and macroscopic and large-scale three-dimensional nanostructured materials can be prepared; the three-dimensional nanostructured materials can be used in high-performance Secondary batteries, electrocatalysis and photoelectric catalysis and other fields.

Description

technical field [0001] The invention belongs to the field of nanomaterials and energy storage materials, in particular to a large-size bicontinuous porous foamed bismuth and a preparation method thereof. Background technique [0002] With the booming development of portable electronic devices and electric vehicles, there is a growing demand for efficient, economical, safe and environmentally friendly energy storage devices. Aqueous rechargeable batteries use aqueous solutions as electrolytes, which have good safety, low cost, high capacity and rate performance, and have attracted great attention from the scientific community. [0003] Various types of aqueous rechargeable batteries, including zinc / / manganese dioxide batteries, aqueous alkali-ion batteries, aqueous nickel / / metal batteries, and aqueous metal-ion batteries, have been extensively studied and exhibit excellent electrochemical performance. In particular, aqueous rechargeable nickel / / metal batteries (e.g. nickel / / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/2202G01N23/2251
CPCG01N23/2202G01N23/2251
Inventor 任山刘雅婷陈怀宇洪澜孟跃中肖敏王拴紧韩东梅
Owner SUN YAT SEN UNIV