Spherical core-shell structure BiOCl/SnO2 visible light catalyst as well as preparation method and application thereof

A core-shell structure, visible light technology, applied in the field of synthesis of visible light catalytic materials, to achieve the effect of good light absorption performance, large specific surface area and pore volume

Inactive Publication Date: 2017-09-22
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, heterojunction catalysts composed of two wide bandgap semiconductors have rarely been reported.

Method used

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  • Spherical core-shell structure BiOCl/SnO2 visible light catalyst as well as preparation method and application thereof
  • Spherical core-shell structure BiOCl/SnO2 visible light catalyst as well as preparation method and application thereof
  • Spherical core-shell structure BiOCl/SnO2 visible light catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Add 1mM Bi(NO 3 ) 3 ·5H 2 O was dissolved in a mixed solution of ethanol and glycerol to obtain solution A; (2) 1mM KCl was added to solution A and stirred evenly to obtain solution B; (3) Solution B was transferred to a 100mL polytetrafluoroethylene reactor React at 180°C for 12h, cool to room temperature naturally after the reaction is completed, filter and separate, wash with water and ethanol three times, and then dry at 60°C in a constant temperature drying oven to obtain the BiOCl photocatalyst. Under 350W Xe light for 60 minutes, the photocatalytic oxidation rate of 10mg / L methylene blue was 80%, and the photocatalytic reduction rate of 10mg / L Cr(VI) wastewater was 2%.

Embodiment 2

[0018] (1) Add 1mM SnCl 4 ·5H 2 O was dissolved in a mixed solution of ethanol and glycerol to obtain solution A; (2) Transfer solution A into a 100mL polytetrafluoroethylene reactor and react at 180°C for 12 hours. After the reaction was completed, naturally cool to room temperature, filter and separate, and water and ethanol three times each, and then dried in a constant temperature drying oven at 60°C to obtain SnO 2 catalyst of light. After reacting under 350W Xe light for 60 minutes, the photocatalytic oxidation rate of 10mg / L methylene blue wastewater was 46%, and the photocatalytic reduction rate of 10mg / L Cr(VI) wastewater was 3%.

Embodiment 3

[0020] (1) Add 1mM Bi(NO 3 ) 3 ·5H 2 O was dissolved in the mixed solution of ethanol and glycerol to obtain solution A; (2) 0.5mM SnCl 4 ·5H 2 O was added to solution A and stirred evenly to obtain solution B; (3) Transfer solution B into a 100mL polytetrafluoroethylene reactor and react at 180°C for 12 hours. After the reaction was completed, naturally cool to room temperature, filter and separate, and wash with water and ethanol. Three times, and then dried in a constant temperature drying oven at 60°C to obtain a spherical core-shell structure BiOCl / SnO 2 visible light catalyst. Reaction under 350W Xe light for 60min, the photocatalytic oxidation rate of 10mg / L rhodamine B, methylene blue, crystal violet, orange four, acid fuchsin, methyl orange 6 kinds of dye wastewater can reach 99%, 10mg / L The photocatalytic reduction rate of Cr(VI) wastewater can reach 99.5%.

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Abstract

The invention discloses a spherical core-shell structure BiOCl / SnO2 visible light catalyst as well as a preparation method and application thereof, and belongs to the technical field of synthesis of visible light catalytic materials. The preparation method comprises the following steps: dissolving Bi(NO3)3.5H2O in a mixed solution of ethanol and glycerol to obtain a solution A; adding SnCl4.5H2O to the solution A, and stirring uniformly to obtain a solution B; transferring the solution B to a polytetrafluoroethylene reactor to react at 180 DEG C for 12 hours, naturally cooling to room temperature after completing the reaction, filtering and separating, washing with water and ethanol respectively for three times, and then drying in a constant temperature drying oven at 60 DEG C to obtain the spherical core-shell structure BiOCl / SnO2 visible light catalyst. The spherical core-shell structure BiOCl / SnO2 visible light catalyst prepared by the method has good light absorption performance, large specific surface area and pore volume, and has performance of high-efficiency photocatalytic oxidation on dye wastewater and photocatalytic reduction Cr(VI) on wastewater under simulated sunlight,.

Description

technical field [0001] The invention belongs to the technical field of synthesis of visible light catalytic materials, in particular to a spherical core-shell structure BiOCl / SnO 2 Visible light catalyst and its preparation method and application. Background technique [0002] Some dye wastewater discharged into natural water bodies has toxic, carcinogenic, and mutagenic effects, and poses a serious threat to human health and ecosystems. In addition, for pollutants in wastewater, Cr(VI) has attracted much attention. Chromium has a wide range of uses in different industrial activities, such as electroplating, textile dyeing, leather tanning and metallurgy, etc., resulting in the toxicity of chromium-containing wastewater, Cr(VI) is potentially carcinogenic and mutagenic, and has been listed as one of the 20 most serious threats to human health. Therefore, their efficient removal from wastewater is crucial. Among various wastewater treatment technologies, semiconductor phot...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01J27/135B01J35/08C02F1/30C02F101/30C02F101/34C02F101/38C02F101/36C02F101/22
CPCC02F1/30B01J27/135C02F2101/40C02F2101/38C02F2101/36C02F2101/34C02F2101/22C02F2101/30C02F2305/10B01J35/397B01J35/39B01J35/51Y02W10/37
Inventor孙剑辉禹崇菲董淑英铁璐娜谭露杨鹏艳王珂赵瑾
OwnerHENAN NORMAL UNIV