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Visible light photocatalyst Bi12O17Cl2 and preparation method thereof

A technology of bi12o17cl2 and catalyst, which is applied in the field of visible light photocatalyst Bi12O17Cl2 and its preparation, can solve the problem of insufficient toxic organic pollutants, and achieve the effects of small industrial amplification factor, easy availability of raw materials, and high yield

Inactive Publication Date: 2013-07-31
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the band gap (3.0eV) of BiOCl is too wide to be excited by visible light to photocatalytically degrade toxic organic pollutants in the environment.

Method used

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  • Visible light photocatalyst Bi12O17Cl2 and preparation method thereof
  • Visible light photocatalyst Bi12O17Cl2 and preparation method thereof
  • Visible light photocatalyst Bi12O17Cl2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Bi 12 o 17 Cl 2 Visible light catalyst preparation, the preparation steps are as follows:

[0026] Step 1: Add bismuth nitrate pentahydrate and potassium chloride into a 25 ml reaction kettle, add 15 ml distilled water to form a mixed solution, wherein the amount of bismuth nitrate pentahydrate is 0.05-0.1 mol / liter, and the amount of potassium chloride 0.05-0.1 mol / liter, the molar ratio of bismuth nitrate pentahydrate and potassium chloride is equal to 1;

[0027] Step 2: Stir the mixed solution in step 1 at room temperature for 10 minutes, then adjust the pH value of the solution to 12.5 to 13 with 1 mol / L sodium hydroxide solution, stir for 10 minutes, and then carry out hydrothermal treatment to the mixed solution at a temperature of 160 ~180℃, constant temperature for 12~24 hours;

[0028] Step 3: After step 2 is completed, filter and rinse the solid product obtained by filtration with distilled water and ethanol three times respectively, and then dry the prod...

Embodiment 2

[0030] Bi 12 o 17 Cl 2 Visible light catalyst preparation, the preparation steps are as follows:

[0031] Step 1: Add bismuth nitrate pentahydrate and potassium chloride in a 25 ml reaction kettle, add 15 milliliters of distilled water, and make a mixed solution, wherein the amount of bismuth nitrate pentahydrate is 0.05 mol / liter, and the amount of potassium chloride is 0.05 Mole / liter, the molar ratio of bismuth nitrate pentahydrate and potassium chloride is equal to 1;

[0032] Step 2: Stir the mixed solution in step 1 at room temperature for 10 minutes, then adjust the pH value of the solution to 12.6 with 1 mol / liter of sodium hydroxide, stir for 10 minutes, and then carry out hydrothermal treatment to the mixed solution at a temperature of 160°C. Constant temperature for 12 hours;

[0033]Step 3: After step 2 is completed, filter and rinse the solid product obtained by filtration with distilled water and ethanol several times, and dry the product at 50°C for 8 hours ...

Embodiment 3

[0035] Efficient Bi 12 o 17 Cl 2 Visible light catalyst preparation, the preparation steps are:

[0036] Step 1: Add bismuth nitrate pentahydrate and potassium chloride to a 25 ml reaction kettle, add 15 milliliters of distilled water to form a mixed solution, wherein the amount of bismuth nitrate pentahydrate is 0.1 mol / liter, and the amount of potassium chloride is 0.1 Mole / liter, the molar ratio of bismuth nitrate pentahydrate and potassium chloride is equal to 1;

[0037] Step 2: Stir the mixed solution in step 1 at room temperature for 10 minutes, then adjust the pH value of the solution to 12.7 with 1 mol / liter of sodium hydroxide, stir for 10 minutes, and then carry out hydrothermal treatment to the mixed solution at a temperature of 160°C. Constant temperature for 24 hours;

[0038] Step 3: After step 2 is completed, filter and rinse the solid product obtained by filtration with distilled water and ethanol three times respectively, and dry the product at 50°C for 8...

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Abstract

The invention provides a visible light photocatalyst Bi12O17Cl2 and a preparation method of the photocatalyst. The preparation method comprises the following steps of: dissolving bismuth nitrate pentahydrate and potassium chloride in water to prepare a mixed solution, wherein the molar ratio of bismuth nitrate pentahydrate to potassium chloride is 1:1; and adjusting the pH value of the mixed solution to 12.5-13, then carrying out hydrothermal treatment at 160-180 DEG C on the solution to obtain a solid product, and washing and drying the solid product to obtain the Bi12O17Cl2 product, which is nano sheets with length of a few hundreds of nanometers and width of a few hundreds of nanometers. Under the irradiation of visible light, the photocatalyst can realize that more than 99.5% and approximate 100% of target pollutant pentachlorophenol is degraded within 45 minutes. The method is simple in synthetic route, easy in whole process control, easy in raw material obtaining, low in cost, and high in yield (up to 90%), and is suitable for industrial large-scale production.

Description

technical field [0001] The present invention relates to Bi 12 o 17 Cl 2 Visible light catalyst and preparation method thereof, especially related to Bi 12 o 17 Cl 2 Visible photocatalyst hydrothermal preparation, prepared Bi 12 o 17 Cl 2 It has high visible light catalytic activity, and under visible light irradiation, it can achieve close to 100% degradation of the target pollutant pentachlorophenol within 45 minutes. Background technique [0002] Since the 1970s, the problem of photocatalytic degradation of toxic organic pollutants in the environment has attracted widespread attention of environmental scientists. As we all know, titanium dioxide is widely used in the photocatalytic degradation of toxic organic pollutants in the environment due to its non-toxic, stable, inexpensive, and high photocatalytic activity. However, the band gap of titanium dioxide (3.2eV for anatase and 3.0eV for rutile) is relatively wide and can only be excited by ultraviolet light in s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06B01J37/10A62D3/17A62D101/28
Inventor 张礼知肖小意
Owner HUAZHONG NORMAL UNIV
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