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Method for preparing BiOX nanosheets at room temperature in one step

A bismuth oxyhalide nanometer, room temperature technology, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., to achieve the effects of controllable species, high application prospects, and low equipment requirements

Inactive Publication Date: 2019-09-13
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This one-step method for preparing BiOX (X=Cl, Br, I) nanosheets at normal temperature has not been reported at home and abroad

Method used

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  • Method for preparing BiOX nanosheets at room temperature in one step
  • Method for preparing BiOX nanosheets at room temperature in one step
  • Method for preparing BiOX nanosheets at room temperature in one step

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step (1), at room temperature of 20°C, dissolve 2mmoL of bismuth nitrate pentahydrate in ethylene glycol, so that the concentration of bismuth element is 80mM, sonicate for 5min until the soluble bismuth salt is completely dissolved, and obtain a transparent solution A;

[0036] Step (2), at room temperature of 20°C, dissolve 2mmoL potassium chloride in deionized water so that the concentration of potassium chloride is 400mM, sonicate for 5-10min until the soluble halide salt is completely dissolved to obtain a transparent solution B;

[0037]Step (3), at room temperature 20°C, under stirring conditions, add solution B dropwise to solution A to form suspension C, wherein the atomic ratio of Cl element to Bi element in the suspension is 1: 1;

[0038] Step (4), after stirring the above mixture C for 1 h, centrifuge, wash with deionized water and absolute ethanol successively, after each washing 3 to 4 times, place the obtained product in an oven at 80°C for 24 h to obtai...

Embodiment 2

[0040] Step (1), at room temperature of 20°C, dissolve 2mmoL of bismuth nitrate pentahydrate in ethylene glycol so that the concentration of bismuth element is 240mM, and ultrasonicate for 5min until the soluble bismuth salt is completely dissolved to obtain a transparent solution A;

[0041] Step (2), at room temperature of 20°C, dissolve 2mmoL potassium chloride in deionized water so that the concentration of potassium chloride is 240mM, sonicate for 5-10min until the soluble halide salt is completely dissolved, and a transparent solution B is obtained;

[0042] Step (3), at room temperature 20°C, under stirring conditions, add solution B dropwise to solution A to form suspension C, wherein the atomic ratio of Cl element to Bi element in the suspension is 1: 1;

[0043] Step (4), after stirring the above mixture C for 1 h, centrifuge, wash with deionized water and absolute ethanol successively, after each washing 3 to 4 times, place the obtained product in an oven at 80°C fo...

Embodiment 3

[0045] Step (1), at room temperature of 20°C, dissolve 2mmoL of bismuth nitrate pentahydrate in ethylene glycol so that the concentration of bismuth element is 400mM, sonicate for 5min until the soluble bismuth salt is completely dissolved to obtain a transparent solution A;

[0046] Step (2), at room temperature of 20°C, dissolve 2mmoL of potassium chloride in deionized water so that the concentration of potassium chloride is 80mM, and sonicate for 5-10min until the soluble halide salts are completely dissolved to obtain a transparent solution B;

[0047] Step (3), at room temperature 20°C, under stirring conditions, add solution B dropwise to solution A to form suspension C, wherein the atomic ratio of Cl element to Bi element in the suspension is 1: 1;

[0048] Step (4), after stirring the above mixture C for 1 h, centrifuge, wash with deionized water and absolute ethanol successively, after each washing 3 to 4 times, place the obtained product in an oven at 80°C for 24 h t...

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Abstract

The invention discloses a method for preparing BiOX nanosheets at room temperature in one step, and specifically discloses a method for preparing a novel BiOX nanosheet photocatalytic material and catalytic application of the novel BiOX nanosheet photocatalytic material. According to the method, a soluble bismuth salt and a sodium halide salt or a potassium halide salt are adopted as main raw materials to prepare the novel BiOX nanosheet photocatalytic material in one step by using a wet chemical method at normal temperature of 20-35 DEG C. The BiOX (X = Cl, Br, I) nanosheet catalyst is prepared through a one-step process, the operation process is simple, and the type is controllable; the preparation process is carried out at normal temperature of 20-35 DEG C, no high-temperature hydrothermal / solvent thermal processes and high-temperature calcination processes are needed, the conditions are mild, and the requirements for equipment is low; no environment-friendly alkali substances and expensive templating agents are added to the reaction system, and the economy is high; the reaction process is basically free of side reactions, and the yield of BiOX remains 99% or above; and the prepared BiOX nanosheets have high photocatalytic activity, and have great potential in control or repair of the ecological environment.

Description

technical field [0001] The invention relates to the fields of nanomaterial preparation and solar photocatalysis and organic matter catalytic degradation, in particular to a method for preparing a novel bismuth oxyhalide nanosheet photocatalytic material at normal temperature of 20-35° C. and its catalytic application. Background technique [0002] In recent years, new bismuth oxyhalide BiOX (X=Cl, Br, I) photocatalytic materials, especially bismuth oxyhalide materials with sheet structure, have attracted widespread attention in the industry due to their excellent physical properties and chemical activity. However, most of the current BiOX (X=Cl, Br, I) nanosheet photocatalysts are prepared by the traditional hydrothermal method / solvothermal method. , Br, I) the application of photocatalyst. Secondly, in order to obtain the BiOX (X=Cl, Br, I) nanosheet structure, the preparation process mostly adopts the organic template method, the template agent is expensive, the productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/30C01G29/00C02F101/38
CPCB01J27/06C02F1/30C01G29/00C02F2305/10C02F2101/38C01P2002/72C01P2004/03B01J35/39
Inventor 刘娟娟邹世辉
Owner HANGZHOU DIANZI UNIV
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