Preparation method of Bi4NbO8Cl

A technology of hydrothermal reaction and potassium chloride, which is applied in the field of photocatalytic materials, can solve the problems of uncontrollable crystal plane growth, long reaction time at high temperature, and low photocatalytic efficiency, and achieve excellent visible light catalytic performance, uniform crystal size, and catalytic highly active effect

Pending Publication Date: 2020-02-11
河北地质大学
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For existing Bi 4 NbO 8 In the process of Cl synthesis, crystal face growth is not easy to control, and there are high temperature reaction time, high energy consumption, Bi 4 NbO 8 The problem that the photocatalytic efficiency of Cl is low, the present invention provides a kind of Bi 4 NbO 8 The preparation method of Cl

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  • Preparation method of Bi4NbO8Cl
  • Preparation method of Bi4NbO8Cl
  • Preparation method of Bi4NbO8Cl

Examples

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Effect test

Embodiment 1

[0032] A Bi 4 NbO 8 The preparation method of Cl comprises the following processing steps:

[0033] a. According to Bi 4 NbO 8 For the stoichiometry of corresponding elements in Cl, add 1.455g of bismuth nitrate pentahydrate and 0.224g of potassium chloride into a beaker filled with 30mL of distilled water, stir at 200r / min for 1h, and obtain a white suspension;

[0034] b. Slowly add 1 mol / L sodium hydroxide aqueous solution to the white suspension, and keep stirring until the pH of the white suspension reaches 12.5, and stir at 200r / min for 0.5h to obtain a suspension;

[0035] c. Transfer the suspension into a polytetrafluoroethylene-lined hydrothermal reaction kettle, tighten the lid, put it in an oven, adjust the temperature of the oven to 160°C, and carry out hydrothermal reaction. The reaction time is 18h; The resulting product was filtered, washed, and dried in an oven at 55°C for 6 hours to obtain a hydrothermal reaction product;

[0036] d. Mix the hydrothermal ...

Embodiment 2

[0039] A Bi 4 NbO 8The preparation method of Cl comprises the following processing steps:

[0040] a. According to Bi 4 NbO 8 For the stoichiometry of corresponding elements in Cl, add 1.455g of bismuth nitrate pentahydrate and 0.224g of potassium chloride into a beaker filled with 30mL of distilled water, stir at 200r / min for 1h, and obtain a white suspension;

[0041] b. Slowly add 1 mol / L sodium hydroxide aqueous solution to the white suspension, and keep stirring until the pH of the white suspension reaches 13, and stir at 200r / min for 0.5h to obtain a suspension;

[0042] c. Transfer the suspension into a polytetrafluoroethylene-lined hydrothermal reaction kettle, tighten the lid, put it in an oven, adjust the temperature of the oven to 170°C, and carry out hydrothermal reaction. The reaction time is 24h; The obtained product was filtered, washed, and dried in an oven at 60°C for 7 hours to obtain a hydrothermal reaction product;

[0043] d. After mixing the hydrothe...

Embodiment 3

[0045] A Bi 4 NbO 8 The preparation method of Cl comprises the following processing steps:

[0046] a. According to Bi 4 NbO 8 For the stoichiometry of corresponding elements in Cl, add 1.455g of bismuth nitrate pentahydrate and 0.224g of potassium chloride into a beaker filled with 32mL of distilled water, stir at 200r / min for 1h, and obtain a white suspension;

[0047] b. Slowly add 1 mol / L sodium hydroxide aqueous solution to the white suspension, and keep stirring until the pH of the white suspension reaches 13.5, and stir at 200r / min for 0.5h to obtain a suspension;

[0048] c. Transfer the suspension into a polytetrafluoroethylene-lined hydrothermal reaction kettle, tighten the lid, put it in an oven, adjust the temperature of the oven to 180°C, and carry out hydrothermal reaction. The reaction time is 36h; The obtained product was filtered, washed, and dried in an oven at 60°C for 8 hours to obtain a hydrothermal reaction product;

[0049] d. After mixing the hydro...

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Abstract

The invention relates to the technical field of photocatalytic materials, and particularly discloses a preparation method of Bi4NbO8Cl. The preparation method of the Bi4NbO8Cl comprises the followingsteps: carrying out a hydrothermal reaction on bismuth nitrate pentahydrate and potassium chloride under alkaline conditions, and calcining a hydrothermal reaction product, niobium pentoxide, potassium chloride and sodium chloride to obtain the Bi4NbO8Cl. The preparation method of Bi4NbO8Cl disclosed by the invention is simple to operate, low in preparation cost and low in energy consumption, andthe obtained Bi4NbO8Cl is good in crystal form structure and relatively high in photocatalytic activity.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a Bi 4 NbO 8 The preparation method of Cl. Background technique [0002] In recent years, photocatalytic technology has been widely considered as an efficient and environmentally friendly production technology, among which Bi-based semiconductor photocatalytic materials have a unique layered structure, suitable band gap, high chemical stability and catalytic activity. , and has a good response to visible light, and is the photocatalytic material with the most development prospects and application potential. [0003] Bi 4 NbO 8 As a new type of layered bismuth-based niobium oxyhalide, its molecular structure belongs to the Aurivillius-Sillén structure, that is, by [Bi 2 o 2 ] 2+ layer, [NbO 4 ] 3- layer and [Cl] - It has a layered structure similar to the Aurivillius structure, and has a polarity similar to BiOX series materials. This Bi-based material w...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30C02F101/38
CPCB01J27/06C02F1/30C02F2101/38B01J35/39
Inventor 刘超范鹏凯
Owner 河北地质大学
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