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Carbon fiber aerogel protected bismuth nanocluster and preparation method thereof

A carbon fiber aerogel, bismuth nanotechnology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of limited CDI system application, inapplicability of wet chemical methods, lack of research, etc., and achieve excellent cycle stability. The effect of stability and stability of ultrafast desalination cycle

Pending Publication Date: 2022-08-05
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the current research on Cl-capture materials is still relatively scarce, which limits the application of CDI systems. Therefore, the development of new MNCs (such as Bi NCs) with specific affinity for Cl- is of great significance for the realization of ultrafast electrochemical desalination.
However, because metal Bi is difficult to find suitable ligands to interact with it to form Bi NCs, the traditional wet chemical method is not suitable for the synthesis of Bi NCs. Therefore, further development of the synthesis strategy of Bi NCs is very important for the development of EDI. practical significance

Method used

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  • Carbon fiber aerogel protected bismuth nanocluster and preparation method thereof
  • Carbon fiber aerogel protected bismuth nanocluster and preparation method thereof
  • Carbon fiber aerogel protected bismuth nanocluster and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] A preparation method of carbon fiber aerogel-protected bismuth nanoclusters, comprising the following steps:

[0032] 1) Take the BC hydrogel (4×4×1cm) and wash it with deionized water to pH 6.5;

[0033] 2) The washed BC hydrogel was placed in 200 mL of Bi(NO) with a concentration of 20 wt%. 3 ) 3 Soak in aqueous solution for 48 hours to make bismuth ions (Bi 3+ ) was immersed in the BC skeleton, and the immersed BC hydrogel was frozen at minus 40 °C for 48 hours in an ultra-low temperature refrigerator, and then placed in a freeze dryer for 48 hours under the condition of pressure < 10Pa to obtain a composite aerogel. glue;

[0034] 3) Put the composite aerogel prepared in step 2) in a tube furnace at 10°C for min -1 The temperature was raised to 520 °C for high temperature carbonization for 1 hour, followed by 5 °C min -1 The heating rate was increased to 800 °C for 2 h under temperature-controlled gasification to obtain carbon fiber aerogel-protected bismuth na...

Embodiment 2

[0036] A preparation method of carbon fiber aerogel-protected bismuth nanoclusters, comprising the following steps:

[0037] 1) Take the BC hydrogel (4×4×1cm) and wash it with deionized water to pH 6.5;

[0038] 2) The washed BC hydrogel was placed in 200 mL of Bi(NO) with a concentration of 30 wt%. 3 ) 3 Soak in aqueous solution for 48 hours to make bismuth ions (Bi 3+ ) was immersed in the BC skeleton, and the immersed BC hydrogel was frozen at minus 40 °C for 48 hours in an ultra-low temperature refrigerator, and then placed in a freeze dryer for 48 hours under the condition of pressure < 10Pa to obtain a composite aerogel. glue;

[0039] 3) Put the composite aerogel prepared in step 2) in a tube furnace at 10°C for min -1 The temperature was raised to 520 °C for high temperature carbonization for 1 hour, followed by 5 °C min -1 The heating rate was increased to 800 °C for 2 h under temperature-controlled gasification to obtain carbon fiber aerogel-protected bismuth na...

Embodiment 3

[0041] A preparation method of carbon fiber aerogel-protected bismuth nanoclusters, comprising the following steps:

[0042] 1) Take the BC hydrogel (4×4×1cm) and wash it with deionized water to pH 6.5;

[0043] 2) The washed BC hydrogel was placed in 200 mL of Bi(NO) with a concentration of 40 wt%. 3 ) 3 Soak in aqueous solution for 72 hours to make bismuth ions (Bi 3+ ) was immersed in the BC skeleton, and the immersed BC hydrogel was frozen in an ultra-low temperature refrigerator below minus 40 °C for 48 hours, and then placed in a freeze dryer for 48 hours under the condition of a pressure <10Pa to obtain a composite gas. gel;

[0044] 3) Put the composite aerogel prepared in step 2) in a tube furnace at 10°C for min -1 The temperature was raised to 520 °C for high temperature carbonization for 1 hour, followed by 5 °C min -1 The heating rate was increased to 800 °C for 2 h under temperature-controlled gasification to obtain carbon fiber aerogel-protected bismuth nan...

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Abstract

The invention relates to the technical field of nano material preparation, and discloses a bismuth nanocluster protected by carbon fiber aerogel and a preparation method thereof.The preparation method comprises the steps that bacterial cellulose hydrogel is taken and washed with deionized water to be neutral; soaking the cleaned bacterial cellulose hydrogel in a Bi (NO3) 3 aqueous solution, performing low-temperature freezing after soaking, and then performing freeze drying to obtain composite aerogel; performing high-temperature carbonization on the composite aerogel, and heating, controlling the temperature and gasifying after carbonization to obtain the bismuth nanocluster (BiNCs-coated CNFAs) protected by the carbon fiber aerogel. The EDI desalination system constructed by using the Bi NCs coated CNFAs prepared by the invention as an electrode material can show better electronic conductivity and structural stability, and shows ultrafast desalination rate, ultrahigh desalination capacity and excellent cycling stability.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a carbon fiber aerogel-protected bismuth nanocluster and a preparation method thereof. Background technique [0002] Metal nanoclusters (MNCs) are an emerging class of functional nanomaterials with sizes between single atoms and metal nanoparticles (usually < 3 nm), with ultra-small size, tunable surface chemistry, atomic-scale Precise structure, ultra-high surface atomic ratio and other extremely special structural characteristics. These properties make it have broad application prospects in the fields of energy conversion, environmental protection and biomedicine. At present, researchers have made remarkable progress in the synthesis and size tuning of noble metal NCs, such as Au NCs, AgNCs, and Cu NCs, and used them as core materials in various research fields. Researchers have gradually found that NCs have extremely high potential application value and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F1/461
CPCC02F1/46109C02F1/4691C02F2001/46133Y02E60/10
Inventor 刘勇袁勋郭子鑫刘子振韩文昊秦成锦
Owner QINGDAO UNIV OF SCI & TECH
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