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Ultra-fast preparation method of Bi nanoparticles and surface defects co-modified BiOCl nanosheets

A nanoparticle and nanosheet technology, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effect of simple deflagration reaction, strong repeatability, and broadened light absorption bandwidth

Inactive Publication Date: 2019-12-06
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, people use microwave radiation [b) H.Li, F.Qin, Z.Yang, X.Cui, J.Wang, L.Zhang, J.Am.Chem.Soc.2017,139,3513.], water Thermal [c) J.Xu, Y.Teng, F.Teng, Sci Rep.2016,6,32457.], photoreduction [d) S.Weng, J.Hu, M.Lu, X.Ye, Z. Pei,M.Huang,L.Xie,S.Lin,P.Liu,App.Catal.B:Environmental.2015,16,205] and other methods to prepare BiOCl modified by surface defects, but at the same time prepare Bi nanoparticles and surface Defect co-modified BiOCl nanosheets remain a challenge

Method used

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  • Ultra-fast preparation method of Bi nanoparticles and surface defects co-modified BiOCl nanosheets
  • Ultra-fast preparation method of Bi nanoparticles and surface defects co-modified BiOCl nanosheets
  • Ultra-fast preparation method of Bi nanoparticles and surface defects co-modified BiOCl nanosheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] At room temperature, 4.0 g of prepared BiOCl nanosheets and 0.1 g of sodium azide (NaN 3 ), a milky white suspension was obtained after magnetic stirring for 30 min. Slowly pour the suspension into a crucible filled with liquid nitrogen for rapid freezing, and freeze-dry to obtain BiOCl / NaN 3 mixture. Then it was placed in a closed high-temperature reaction kettle, filled with nitrogen protective gas, and heated by an electric heating wire to make NaN 3 A deflagration reaction occurred, and the product after the reaction was washed repeatedly with deionized water for more than 3 times, and dried in a vacuum oven at 60°C for 12 hours to obtain BiOCl nanosheets (BVB) co-modified with Bi nanoparticles and surface defects, which were named as BVB-1.

Embodiment 2

[0026] Add 4.0 g of BiOCl nanosheets and 0.2 of sodium azide (NaN 3 ), after magnetic stirring for 30 min, a milky white homogeneous suspension was obtained. Slowly pour the suspension into a crucible filled with liquid nitrogen for rapid freezing, and freeze-dry to obtain BiOCl / NaN 3 mixture. Then it was placed in a closed high-temperature reactor, and the other steps were the same as in Example 1 to obtain BiOCl nanosheets (BVB) co-modified with Bi nanoparticles and surface defects, which was named BVB-2.

Embodiment 3

[0028] At room temperature, 4.0 g of BiOCl nanosheets and 0.3 g of sodium azide (NaN 3 ), after magnetic stirring for 30 min, a milky white homogeneous suspension was obtained. Slowly pour the suspension into a crucible filled with liquid nitrogen for rapid freezing, and freeze-dry to obtain BiOCl / NaN3 mixture. Then it was placed in a closed high-temperature reactor, and the other steps were the same as in Example 1 to obtain BiOCl nanosheets (BVB) co-modified with Bi nanoparticles and surface defects, which was named BVB-3.

[0029] like figure 1 a-1c shows square BiOCl obtained by hydrothermal method. NaN 3 After deflagration treatment, such as figure 1 d–f, Compared with the smooth BiOCl nanosheets, BVB-1, BVB-2, and BVB-3 have a large number of micropits doped with Bi nanoparticles. like figure 2 It is shown that some small-sized rounded nanosheets appear in the sample in Example 2, and the high-resolution TEM image shows the lattice fringes of Bi nanoparticles with...

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Abstract

The invention discloses an ultra-fast preparation method of Bi nanoparticles and surface defects co-modified BiOCl nanosheets. The preparation method comprises the following steps: (1) adding the prepared BiOCl nanosheets and a certain amount of NaN3 into deionized water, magnetically stirring the mixture for 30 minutes for uniform mixing, slowly pouring the mixture into liquid nitrogen for rapidfreezing, and carrying out freeze-drying; and (2) after the drying is finished, placing a BiOCl and NaN3 mixture in a closed high-temperature reaction kettle, filling the kettle with nitrogen protection gas, carrying out a deflagration reaction on the NaN3 by adopting a heating wire heating mode, repeatedly cleaning products by using the deionized water after the reaction is finished, carrying outdrying, and finally obtaining the Bi nanoparticles and surface defects co-modified BiOCl nanosheets. The preparation method has the advantages of short reaction time, simultaneous completion of formation of BiOCl oxygen defects and doping of Bi nanoparticles, controllable defect and doping amount, high yield and the like; and moreover, the method is simple, the operation is simple and convenient,the universality is good, and the method can be used for preparing other advanced materials.

Description

technical field [0001] The invention belongs to the field of light-to-heat conversion semiconductor materials, in particular to a method using NaN 3 Deflagration method, an ultrafast method for preparing BiOCl nanosheets co-modified with Bi nanoparticles and surface defects. Background technique [0002] With the growth of the global population and the increasingly serious water pollution problem, people are paying more and more attention to the shortage of drinking water. Photothermal materials (Photothermal Materials, PTMs) have attracted widespread attention for their unique properties of directly converting light energy into thermal energy for seawater desalination. So far, a lot of work has been devoted to the synthesis research of various PTMs. Among them, carbon-based materials such as graphene and carbon nanotubes have been widely studied due to their extremely high absorbance and evaporation efficiency. [a) F. Zhao, X. Zhou, Y. Shi, X. Qian, M. Alexander, X. Zhao...

Claims

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Application Information

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IPC IPC(8): C01G29/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G29/00C01P2002/72C01P2002/82C01P2002/84C01P2004/04C01P2004/62C01P2004/64
Inventor 刘有松杨海峰杨光成唐佳琳杨云涛
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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