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Large-size double-continuous porous foam 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 cumbersome, need to be improved, and many influencing factors, and achieve the effects of wide distribution, recyclable raw materials, and simple process

Active Publication Date: 2019-08-20
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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  • Large-size double-continuous porous foam bismuth and preparation method thereof
  • Large-size double-continuous porous foam bismuth and preparation method thereof

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Effect test

Embodiment 1

[0037] Embodiment 1: a kind of large-scale double continuous porous bismuth foam material, preparation method comprises 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, move to a resistance furnace and heat to 500°C, at this temperature Keep it for 180 minutes. During this time period, shake the quartz glass tube every 30 minutes to fully mix the metal lead and bismuth, and then cool and solidify the solution to form a lead-bismuth alloy. Cut the alloy with a blade or a saw blade, and then polish it with sandpaper to make it a thin disc shape with a diameter of 10mm (size can be adjusted) 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-bi...

Embodiment 2

[0041] Embodiment 2: a kind of large-scale double continuous porous bismuth foam material, preparation method comprises the following steps:

[0042] (1) Preparation of lead-bismuth alloy electrode: Weigh 19.0g of metal lead particles (99.9%) and 1.67g of metal tin particles (99.9%), put them into a quartz glass tube, move to a resistance furnace and heat to 500°C, at this temperature Keep it for 180 minutes. During this time period, shake the quartz glass tube every 30 minutes to fully mix the metal lead and bismuth, and then cool and solidify the solution to form a lead-bismuth alloy. Cut the alloy with a blade or a saw blade, and then polish it with sandpaper to make 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 electrode as...

Embodiment 3

[0045] Embodiment 3: a kind of large-scale double continuous porous bismuth foam material, preparation method comprises the following steps:

[0046] (1) Preparation of lead-bismuth alloy electrode: 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, move to a resistance furnace and heat to 500°C, at this temperature Keep it for 180 minutes. During this time period, shake the quartz glass tube every 30 minutes to fully mix the metal lead and bismuth, and then cool and solidify the solution to form a lead-bismuth alloy. Cut the alloy with a blade or a saw blade, and then polish it with sandpaper to make 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 electrode as...

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Abstract

The invention discloses a large-size double-continuous porous foam bismuth and a preparation method thereof. A material is formed by continuous three-dimensional nanometer bismuth network structures and continuous three-dimensional pores which are connected to each other so as to form a three-dimensional composite structure of a macro dimension. The preparation method of the material comprises thefollowing steps of manufacturing lead-bismuth alloy; using an electrochemical method to carry out de-alloying processing on the lead-bismuth alloy; and cleaning and drying the material after the de-alloying processing to obtain a double-continuous porous foam bismuth material. The preparation method adopts a simple technology, a raw material can be recycled and cost is low. The obtained double-continuous porous foam bismuth material has a large specific surface area, completely continuous two phases, uniform pore distribution, and a continuous bismuth network, a pore size can be controlled inmicrometer and nanometer ranges, and a macroscopic large-sized three-dimensional nano-structure material. The three-dimensional nano-structure material can be applied to fields of a high performancesecondary cell, electro-catalysis, photoelectrocatalysis and the like.

Description

technical field [0001] The invention belongs to the fields of nanometer materials and energy storage materials, and in particular relates to a bismuth bismuth with large-size bicontinuous porous foam 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 solution as the electrolyte, which has good safety, low cost, high capacity and rate performance, and has attracted great attention from the scientific community. [0003] Various types of aqueous rechargeable batteries, including zinc / / manganese dioxide batteries, aqueous alkaline-ion batteries, aqueous nickel / / metal batteries, and aqueous metal-ion batteries have been extensively studied and exhibited excellent electrochemical performance. Especially aqueous rechargeable nickel / / m...

Claims

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Application Information

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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
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