Layered hydroxide/BiOCl photocatalytic material and preparation method thereof

A technology of photocatalytic materials and hydroxides, applied in chemical instruments and methods, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve the problem of undiscovered flower-shaped BiOCl/LDH layer-by-layer self-assembled composite visible light catalytic materials Preparation methods and other issues to achieve the effect of improving photocatalytic performance, enhancing photocatalytic activity, and enhancing photocatalytic performance

Active Publication Date: 2017-03-22
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Through literature search, no patent applications and literature reports on the preparation method of flower-shaped BiOCl / LDH layer-by-layer self-assembled composite visible light catalytic materials were found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: In this embodiment, taking the treatment concentration as 2000mg / L TOC as an example, the preparation method of BiOCl / ZnCrLDH layer by layer self-assembled composite visible light photocatalytic material, the steps are as follows:

[0021] (1) BiOCl was prepared by hydrothermal method, and ZnCrLDH was prepared by co-precipitation method;

[0022] (2) Dissolve BiOCl prepared in step (1) in secondary water at 1 g / L, and sonicate for 6 hours;

[0023] (3) Dissolve the LDH obtained in step (1) in formamide at 1 g / L, stir under nitrogen for 24 hours, and centrifuge at 3000 rpm for 10 minutes to remove part of the unstripped LDH to obtain positively charged LDH nanosheets;

[0024] (4) Slowly add the solution according to step (2) into step (3), mix the two solutions, and then stir for 24 hours under the sealant seal;

[0025] (5) Centrifuge and wash the solution according to step (4) twice with water, take the solid phase and dry it in an oven at 60° C. for 10...

Embodiment 2

[0027] Embodiment 2: In this embodiment, taking the treatment concentration of 2000 mg / L TOC as an example, the preparation method of BiOCl / NiCrLDH layer-by-layer self-assembled composite visible light photocatalytic material, the steps are as follows:

[0028] (1) BiOCl was prepared by hydrothermal method, and NiCrLDH was prepared by co-precipitation method;

[0029] (2) Dissolve BiOCl prepared in step (1) in secondary water at 1 g / L, and sonicate for 6 hours;

[0030] (3) Dissolve the NiCrLDH obtained in step (1) in formamide at 1 g / L, stir for 24 h under nitrogen, and centrifuge at 3000 rpm for 10 minutes to remove part of the unstripped LDH to obtain positively charged LDH nanosheets;

[0031] (4) Slowly add the solution according to step (2) into step (3), mix the two solutions, and then stir for 24 hours under the sealant seal;

[0032] (5) Centrifuge and wash the solution according to step (4) with secondary water, take the solid phase and dry it in an oven at 60° C. f...

Embodiment 3

[0034] Embodiment 3: In this embodiment, taking the treatment concentration of 2000 mg / L TOC as an example, the preparation method of BiOCl / ZnFeLDH layer-by-layer self-assembled composite visible light photocatalytic material, the steps are as follows:

[0035] (1) BiOCl was prepared by hydrothermal method, and ZnFeLDH was prepared by co-precipitation method;

[0036] (2) Dissolve BiOCl prepared in step (1) in secondary water at 1 g / L, and sonicate for 6 hours;

[0037] (3) Dissolve the ZnFeLDH obtained in step (1) in formamide at 1 g / L, stir for 24 h under nitrogen, and centrifuge at 3000 rpm for 10 minutes to remove part of the unstripped LDH to obtain positively charged LDH nanosheets;

[0038] (4) Slowly add the solution according to step (2) into step (3), mix the two solutions, and then stir for 24 hours under the sealant seal;

[0039] (5) The solution according to step (4) was centrifuged and washed with secondary water, and the solid phase was dried in an oven at 60°...

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Abstract

The invention relates to a layered hydroxide / BiOCl photocatalytic material and a preparation method thereof. The preparation method comprises the following steps: preparing BiOCl through a hydrothermal method, and preparing LDH (Layered Double Hydroxide) through a coprecipitation method; and stripping the LDH with formamide to obtain positively charged LDH, mixing the stripped LDH with a negatively charged BiOCl solution, performing sealed sealing for one day, and self-assembling the two materials to obtain a BiOCl / LDH layered composite material. The shape of the composite material is controlled according to the shapes of BiOCl and LDH and the natures of charges on the surface of the stripped LDH and the layered BiOCl to prepare an LDH / BiOCl layered self-assembled composite heterojunction material; therefore, a method for preparing the BiOCl / LDH layered composite material with high visible light photocatalytic performance is provided; and TOC can be efficiently removed through catalysis. The BiOCl / LDH layered composite visible light photocatalytic material disclosed by the invention is high in performance of photocatalytically degrading organic matters under visible light and low in energy consumption.

Description

technical field [0001] The invention relates to a layered hydroxide / BiOCl photocatalytic material and a preparation method thereof. The material is used for visible light photocatalytic degradation of organic pollutants such as rhodamine B. Background technique [0002] There are a large amount of organic matter in domestic and industrial wastewater, which has caused great harm to economic development and people's health. At present, the research on sewage treatment methods has attracted widespread attention. The development of chemical pollutant removal technology with high efficiency, low energy consumption, wide application range and deep oxidation ability has always been a research hotspot in this field. [0003] Photocatalytic technology refers to adding a certain amount of semiconductor photocatalyst to an aqueous solution containing pollutants. Under the condition of light irradiation, the semiconductor material is excited by light to generate electron-hole pairs with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/08B01J27/132B01J27/138B01J35/02C02F1/30C02F1/72C02F101/30B01J35/00
CPCC02F1/30C02F1/725B01J27/08B01J27/132B01J27/138C02F2101/306B01J35/00B01J35/30B01J35/39
Inventor 张佳吴美英钱光人周吉峙
Owner SHANGHAI UNIV
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