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Preparation method of supported praseodymium doped BiOCl photocatalyst

A photocatalyst and load-type technology, which is applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., to achieve good absorption, good stability, and good physical and chemical stability.

Inactive Publication Date: 2018-07-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the preparation of supported BiOCl photocatalysts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Pretreatment of reed powder: In the reactor, add deionized water: 60 mL, concentrated hydrochloric acid: 19 mL, stir evenly, cool to room temperature, 30% mass percent hydrogen peroxide: 7 mL, dissolve, Then add reed powder: 10g, soak at room temperature for 12 hours, boil for 20 minutes, wash with deionized water until neutral, separate solid and liquid, and dry to obtain pretreated reed powder;

[0025] (2) Preparation of magnetic reed powder: In the reactor, add N-methylmorpholine oxide: 58 mL, deionized water: 8 mL, pretreated reed powder: 18 g, ultrasonically disperse, add oxalic acid: 6 g, temperature Raise to 100°C constant temperature, stir, and reflux for 7 hours, then add nano-ferric oxide: 3g, stir evenly, the temperature drops to 70±2°C, spray into the coagulation liquid, separate solid and liquid, wash, and dry to obtain magnetic reeds pink;

[0026] (3) Preparation of solution A: In the reactor, add deionized water: 63 mL, concentrated hydrochloric ac...

Embodiment 2

[0030] (1) Pretreatment of reed powder: In the reactor, add deionized water: 57 mL, concentrated hydrochloric acid: 21 mL, stir well, cool to room temperature, 30% mass percent hydrogen peroxide: 5 mL, dissolve, Then add reed powder: 12g, soak at room temperature for 12 hours, boil for 20 minutes, wash with deionized water until neutral, separate solid and liquid, and dry to obtain pretreated reed powder;

[0031](2) Preparation of magnetic reed powder: In the reactor, add N-methylmorpholine oxide: 55 mL, deionized water: 10 mL, pretreated reed powder: 16 g, ultrasonically disperse, add oxalic acid: 8 g, temperature Raise to 100°C constant temperature, stir, and reflux for 6 hours, then add nano-ferric oxide: 4g, stir evenly, the temperature drops to 70±2°C, spray into the coagulation liquid, separate solid-liquid, wash, and dry to obtain magnetic reeds pink;

[0032] (3) Preparation of solution A: In the reactor, add deionized water: 66 mL, concentrated hydrochloric acid: 13...

Embodiment 3

[0036] (1) Pretreatment of reed powder: In the reactor, add deionized water: 62 mL, concentrated hydrochloric acid: 17 mL, stir well, cool to room temperature, mass percent concentration is 30% hydrogen peroxide: 9 mL, dissolve, Add reed powder: 8g, soak at room temperature for 12 hours, boil for 20 minutes, wash with deionized water until neutral after cooling, separate solid and liquid, and dry to obtain pretreated reed powder;

[0037] (2) Preparation of magnetic reed powder: In the reactor, add N-methylmorpholine oxide: 59 mL, deionized water: 6 mL, pretreated reed powder: 20 g, ultrasonically disperse, add oxalic acid: 4 g, temperature Raise to 100°C constant temperature, stir, and reflux for 8 hours, then add nano-ferric oxide: 3g, stir evenly, the temperature drops to 70±2°C, spray into the coagulation liquid, separate solid-liquid, wash, and dry to obtain magnetic reeds pink;

[0038] (3) Preparation of solution A: In the reactor, add deionized water: 60 mL, concentra...

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PUM

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Abstract

The invention discloses a preparation method of a supported praseodymium doped BiOCl photocatalyst. The preparation method is characterized by comprising the following steps: dissolving reed powder byadopting N-methyl morpholine oxide; adding nano ferroferric oxide to prepare magnetic reed powder; adding the following component into a reactor according to the mass percent: 70 to 75 percent of a magnetic reed powder suspension solution; stirring and dropwise adding 25 to 30 percent of a praseodymium and Bi(NO3)3 solution; raising the temperature to 50+ / -2 DEG C and keeping the temperature; stirring and reacting for 30min; dropwise adding ammonia water to regulate the pH (Potential of Hydrogen) of the system to be 9.5; transferring a mixture into a reaction kettle; sealing, raising the temperature to 130+ / -2 DEG C and keeping the temperature; reacting for 4 to 6h and cooling to room temperature; carrying out solid-liquid separation and washing with de-ionized water; drying to obtain thesupported praseodymium doped BiOCl photocatalyst. The preparation method disclosed by the invention has the characteristics of simplicity, good stability, degradability, environment friendliness andthe like; the catalyst is easy to recycle and has the characteristics of moderate reaction conditions, high catalytic activity, less dosage and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of supported catalysts, in particular to a method for preparing a supported praseodymium-doped BiOCl photocatalyst and its application in wastewater treatment. Background technique [0002] Semiconductor photocatalysis technology, as a new "green chemical method", has been widely studied in energy conversion and environmental restoration applications. Traditional semiconductor photocatalysts such as TiO2 and ZnO have strong oxidizing properties and good photoinducibility, and have been widely used in the degradation of various pollutants in water bodies. The ability to utilize ultraviolet light, which accounts for only 4% of the solar spectrum, significantly limits its applications. Therefore, the development of new visible-light-responsive semiconductor photocatalysts has attracted more and more attention. In recent years, bismuth oxyhalide compounds (BiOX, X = Cl, Br, I) semiconductor phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J32/00B01J31/28B01J37/12B01J37/10C02F1/30C02F101/30
CPCC02F1/30B01J27/06B01J31/28B01J37/10B01J37/12C02F2305/10C02F2101/308B01J35/33B01J35/39
Inventor 李慧芝翟玉博李冬梅
Owner UNIV OF JINAN
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