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Preparation method of flower-like BiOCl photocatalyst, prepared BiOCl photocatalyst and application of BiOCl photocatalyst

A photocatalyst and flower-like technology, applied in the field of BiOCl photocatalyst, can solve the problems of high cost and cumbersome process, and achieve the effects of less energy consumption and simple and convenient steps.

Active Publication Date: 2017-09-15
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are cumbersome, costly, and require a large amount of complex equipment.

Method used

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  • Preparation method of flower-like BiOCl photocatalyst, prepared BiOCl photocatalyst and application of BiOCl photocatalyst
  • Preparation method of flower-like BiOCl photocatalyst, prepared BiOCl photocatalyst and application of BiOCl photocatalyst
  • Preparation method of flower-like BiOCl photocatalyst, prepared BiOCl photocatalyst and application of BiOCl photocatalyst

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preparation example Construction

[0034] The preparation method of the flower-shaped BiOCl photocatalyst of the embodiment of the present invention, described method comprises the following steps:

[0035] (1) Add bismuth nitrate and maltose in ultrapure water, and drop chloride solution, stir to form bismuth precursor; The molar dosage ratio of described bismuth nitrate and maltose is: 1: (0.2-3);

[0036] (2) Adjust the pH value of the bismuth precursor to 5.0-6.5 with an alkaline solution to form a reactant;

[0037] (3) Reacting the reactant at 150-160°C for 24-30h to obtain a precipitate;

[0038] (4) Washing and drying the precipitate obtained in step (3) to obtain a BiOCl photocatalyst with a flower-like structure.

[0039] In the synthesis process, bismuth source generally selects bismuth nitrate, such as commercially available Bi(NO 3 ) 3 ·5H 2 O, bismuth nitrate decomposes into basic salt in water. The chloride is easily soluble in water, and it is prepared into a solution for subsequent use. T...

Embodiment 1

[0047] Use an electronic balance to weigh 0.48507g of bismuth nitrate pentahydrate and 0.5g of maltose in a beaker; prepare a potassium chloride solution with a concentration of 0.2mol / L and a potassium hydroxide solution with a concentration of 1mol / L; add 25mL of deionized water to the beaker water, and add 10mL of 0.2mol / L potassium chloride solution dropwise, and stir while adding dropwise. After the dropwise addition, continue to stir at room temperature for 0.5h to form a certain concentration of bismuth precursor; The precursor was transferred to the inner lining of the reactor and continued to stir at room temperature; the pH of the bismuth precursor was adjusted to 6.0 with the prepared potassium hydroxide solution; Thermal reaction to obtain a precipitate; wash the precipitate with ultrapure water until clarified, then with absolute ethanol until clarified, put it in a vacuum drying oven, and dry it at 40°C to obtain the target product BiOCl.

Embodiment 2

[0049] Use an electronic balance to weigh 0.48507g of bismuth nitrate pentahydrate and 0.1g of maltose in a beaker; prepare a potassium chloride solution with a concentration of 0.2mol / L and a potassium hydroxide solution of 1mol / L; add 25mL of deionized water to the beaker water, and add 10mL of 0.2mol / L potassium chloride solution dropwise, and stir while adding dropwise. After the dropwise addition, continue to stir at room temperature for 0.5h to form a certain concentration of bismuth precursor; The precursor was transferred to the inner lining of the reactor and continued to stir at room temperature; the pH of the bismuth precursor was adjusted to 6.0 with the prepared potassium hydroxide solution; Thermal reaction to obtain a precipitate; wash the precipitate with ultrapure water until clarified, then with absolute ethanol until clarified, put it in a vacuum drying oven, and dry it at 40°C to obtain the target product BiOCl.

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Abstract

The invention provides a preparation method of a flower-like BiOCl photocatalyst, the prepared BiOCl photocatalyst and application of the BiOCl photocatalyst. The method comprises the following steps: (1) adding bismuth nitrate and maltose into water, dripping a chloride solution, and stirring to form a bismuth precursor, wherein a molar dose ratio of the bismuth nitrate to maltose is 1:(0.2-3); (2) regulating the pH value of the bismuth precursor to be 5.0-6.5 by adopting an alkaline solution so as to form reactants; (3) reacting the reactants at the temperature of 150-160 DEG C for 24-30 hours so as to obtain a precipitate; (4) washing and drying the obtained precipitate in the step (3), thereby obtaining the BiOCl photocatalyst with a flower-like structure. According to the method disclosed by the invention, the defects in the preparation method of the conventional BiOCl photocatalyst are overcome, the obtained BiOCl photocatalyst is capable of well responding to visible light and has high visible light photocatalytic activity as well as excellent stability and reusability.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical photocatalytic water treatment, and in particular relates to a preparation method of a flower-shaped BiOCl photocatalyst, the prepared BiOCl photocatalyst and an application. Background technique [0002] In recent years, more and more countries have paid attention to the problem of environmental pollution. Social and economic development is very rapid. Under the premise of massive consumption of fossil energy, photocatalytic technology has been born. Photocatalytic technology is a green and environment-friendly technology, and solar energy is inexhaustible and inexhaustible. It is an ideal clean energy at present. , Novel photocatalysts have undoubtedly become a current research hotspot. TiO 2 As a photocatalyst, the research is extensive and in-depth, however, TiO 2 The band gap energy is large, so it can only absorb ultraviolet light with a wavelength of less than 387nm, and c...

Claims

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Application Information

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IPC IPC(8): C01G29/00B01J27/06C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCC01G29/00C02F1/30B01J27/06C01P2002/72C01P2002/70C01P2002/80C01P2004/03C01P2002/01C01P2004/45C02F2305/10C02F2101/30C02F2101/36C02F2101/38C02F2101/34B01J35/39
Inventor 徐海明夏东升李东亚胡明玥孙磊袁向娟曹刚孙静宇蔡雨杰
Owner WUHAN TEXTILE UNIV
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