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Preparation method of {001} crystal surface-exposed BioBr square nanosheet

A technology of nanosheets and crystal planes is applied in the field of preparation of nanophotocatalytic materials to achieve the effect of high application value

Inactive Publication Date: 2014-04-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far there is only one report [D Zhang, J Li, QG Wang and QS Wu. J. Mater. Chem. A .2013, 1, 8622–8629] using a water-ethanol system to control the synthesis of exposed {001} crystal faces BiOBr flakes with irregular morphology

Method used

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  • Preparation method of {001} crystal surface-exposed BioBr square nanosheet
  • Preparation method of {001} crystal surface-exposed BioBr square nanosheet
  • Preparation method of {001} crystal surface-exposed BioBr square nanosheet

Examples

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Embodiment 1

[0019] 2 mmol Bi(NO 3 ) 3 Dissolve in 5 mL of nitric acid solution to obtain solution A; dissolve 0.8 g [Bmin]Br in 30 ml of water to obtain solution B; then mix solution A and solution B, and use 2 mol L -1 The NaOH solution was used to adjust the pH to 1, and stirred to obtain a uniformly distributed solution. The above solution was poured into a 50 ml autoclave, and heated at 120 °C for 12 h. After the reaction, the product was washed with distilled water and absolute ethanol, filtered, and dried to obtain BiOBr square nanosheets with exposed {001} crystal faces.

[0020] figure 1 (a) is the XRD spectrum of the BiOBr square nanosheets with exposed {001} crystal planes synthesized in Example 1 of the present invention. It can be seen from the figure that the obtained BiOBr square nanosheets are pure-phase tetragonal BiOBr crystal phases (JCPDS Card NO . 09-0393), no impurities are formed. "▼" indicates exposed {001} series crystal planes. figure 1 (b) is the EDX spectr...

Embodiment 2

[0024] 1.5 mmol Bi(NO 3 ) 3 Dissolve in 5 mL of nitric acid solution to obtain solution A; dissolve 0.65 g [Bmin]Br in 30 ml of water to obtain solution B; then mix solution A and solution B, and use 2 mol L -1 The NaOH solution was used to adjust the pH to 2, and stirred to obtain a uniformly distributed solution. The above solution was poured into a 50 ml autoclave, and heated at 140 °C for 10 h. After the reaction, the product was washed with distilled water and absolute ethanol, filtered, and dried to obtain BiOBr square nanosheets with exposed {001} crystal faces.

Embodiment 3

[0026] 1 mmol Bi(NO 3 ) 3 Dissolve in 5 mL of nitric acid solution to obtain solution A; dissolve 0.5 g [Bmin]Br in 30 ml of water to obtain solution B; then mix solution A with solution B and use 2 mol L -1The NaOH solution was used to adjust the pH to 3, and stirred to obtain a uniformly distributed solution. The above solution was poured into a 50 ml autoclave, and heated at 160 °C for 8 h. After the reaction, the product was washed with distilled water and absolute ethanol, filtered, and dried to obtain BiOBr square nanosheets with exposed {001} crystal faces.

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Abstract

The invention discloses a preparation method of a {001} crystal surface-exposed BioBr square nanosheet, and belongs to the filed of preparation of nano photocatalytic materials. The specific preparation method is as follows: adding a bismuth salt which can be dissolved in acid into concentrated nitric acid, adding deionized water after preliminarily stirring to carry out dissolving dilution; adding ion liquid [Bmin]Br into the distilled water for stirring and dissolving; mixing the two, pouring the mixture into a high-pressure kettle, controlling the pH to 1-4, centrifuging, washing and drying to obtain the BioBr square nanosheet after hydrothermal reaction. According to the preparation method disclosed by the invention, a photocatalytic material is synthesized by a simple synthesis method and a non-toxic reagent, and environment-friendly requirements are satisfied; in a hydrothermal system, surface energy in a growth process of the crystal is controlled by the ion liquid, so that a proportion of the {001} crystal surface on the surface of the catalyst is improved. The prepared BioBr square nanosheet has higher application value in the fields of pollution treatment, environmental protection, new energy preparation and the like.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer photocatalytic materials, in particular to a method for preparing BiOBr square nanosheets with exposed {001} crystal planes. technical background [0002] For half a century, with the increasingly severe environmental pollution and energy crisis, seeking efficient, harmless, convenient, easy-to-obtain, and environmentally friendly water pollution treatment technologies has become the focus of current scientific research. Semiconductor visible light catalysis technology has become one of the methods to solve pollution and energy problems due to its unique properties such as normal temperature reaction environment and the use of solar energy as light source. Since conventional TiO 2 The quantum yield is low and it can only be excited by ultraviolet light to generate electron-hole pairs. Therefore, it is an inevitable development trend in the field of photocatalysis to seek high-performance...

Claims

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Application Information

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IPC IPC(8): C01B11/20B82Y30/00B82Y40/00B01J27/06
Inventor 谢吉民茅丹俊吕晓萌姜志锋魏巍
Owner JIANGSU UNIV
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