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Three-dimensional porous magnetic controllable preparation method and photocatalytic application thereof

A three-dimensional porous and magnetic technology, applied in the field of photocatalysis, which can solve the problems of easy particle agglomeration, small specific surface area, and high difficulty.

Pending Publication Date: 2022-05-13
YULIN UNIV
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Problems solved by technology

Direct preparation of γ-Fe 2 o 3 It is more difficult, and γ-Fe 2 o 3 The particles are easy to agglomerate, the specific surface area is small, and the photocatalytic quantum efficiency is low

Method used

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  • Three-dimensional porous magnetic controllable preparation method and photocatalytic application thereof
  • Three-dimensional porous magnetic controllable preparation method and photocatalytic application thereof
  • Three-dimensional porous magnetic controllable preparation method and photocatalytic application thereof

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Embodiment Construction

[0041] 1. The present invention works and is implemented in this way, a controllable preparation method of three-dimensional porous magnetism and its photocatalytic application, mainly composed of the following five steps;

[0042] (1) Ni 2+ -Fe 3+ -CO 3 2- - Preparation of LDHs;

[0043] (2) Three-dimensional γ-Fe 2 O 3 @CdCO 3 Preparation of heterostructures;

[0044] (3) γ-Fe 2 O 3 -Cd 2+ -Ni 2+ -Fe 3+ -CO 3 2- - Impurity CdCO in LDHs 3 Impurity removal process;

[0045] (4) Regulation of γ-Fe 2 O 3 -Cd 2+ -Ni 2+ -Fe 3+ -CO 3 2- -γ-Fe in LDHs materials 2 O 3 number of isomers and pore size;

[0046] (5) Photocatalytic degradation of organic dyes;

[0047] The concrete realization process of step (1) is: urea method: according to n(Ni):n(Fe)=3:1, weigh 8.0220gNiCl respectively 2 ·6H 2 0,3.0408g FeC1 3 ·6H 2 0. It is configured as 500ml of mixed solution with a total ion concentration of 0.090mol / L; 100ml of this mixed solution is measured in a p...

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Abstract

The invention discloses a controllable preparation method of three-dimensional porous magnetic material and photocatalytic application of the three-dimensional porous magnetic material, gamma-Fe2O3 has relatively low forbidden bandwidth and relatively good magnetism, and the gamma-Fe2O3 has potential cyclic utilization value in the field of organic dye wastewater treatment as a magnetic photocatalyst. LDHs containing Cd < 2 + >, Ni < 2 + > and Fe < 3 + > transition metal elements are compounds with large specific surface areas and two-dimensional layered structures, and have good adsorption and photocatalytic activity. After the gamma-Fe2O3 is heterogeneous on the surface of the LDHs laminate, gamma-Fe2O3 particles can be effectively inhibited from agglomerating by utilizing the surface interaction of the three-dimensional heterojunction, and the separation of photo-induced electrons and holes in space is enhanced. According to the preparation method, CdCl2. 6H2O, NiCl2. 6H2O and FeCl3. 6H2O are taken as raw materials, the molar ratio of Cd to Ni to Fe is 1: 6: 2, and the three-dimensional porous magnetic gamma-Fe2O3-Cd < 2 + >-Ni < 2 + >-Fe < 3 + >-LDHs heterostructure material is directly prepared by adopting a homogeneous precipitation technology assisted by a complexing agent F <->.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a controllable preparation method of three-dimensional porous magnetism and its photocatalytic application. Background technique [0002] The pollutants in the water body are difficult to remove easily, which has become one of the research hotspots in the field of scientific research and application. In response to this problem, scholars at home and abroad have carried out research on it. Effective methods are mainly characterized by environmental friendliness and low cost; the methods for improving photocatalytic materials are currently mainly reflected in two aspects: first, appropriate modification and modification of ultraviolet light-responsive wide-band gap photocatalytic materials Therefore, it can also respond in the visible light band; secondly, some new photocatalytic materials with visible light response can be developed by rationally designing the method of pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232C02F1/30C02F1/72C02F101/38C02F101/34
CPCB01J27/232C02F1/30C02F2101/308C02F2101/34C02F2101/38C02F2101/40C02F2305/10C02F1/725B01J35/33B01J35/39
Inventor 马向荣党睿张宇鑫马亚军李霄杨方李回归
Owner YULIN UNIV
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