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Preparation method of LaFeO3/ZnIn2S4 composite photocatalyst

A znin2s4, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of incomplete research on the photocatalytic activity of nanocomposite materials, and achieve easy control of preparation conditions and catalytic efficiency. High effect, simple preparation method

Inactive Publication Date: 2018-11-06
CHANGZHOU UNIV
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  • Claims
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Problems solved by technology

[0004] Literature survey found that LaFeO 3 @ZnIn 2 S 4 Photocatalytic activity of nanocomposites has not been thoroughly studied

Method used

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  • Preparation method of LaFeO3/ZnIn2S4 composite photocatalyst
  • Preparation method of LaFeO3/ZnIn2S4 composite photocatalyst
  • Preparation method of LaFeO3/ZnIn2S4 composite photocatalyst

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Embodiment 1

[0023] (1) Preparation of flower spherical indium zinc sulfide ZnIn by hydrothermal method 2 S 4 : Zinc sulfate hydrate ZnSO 4 ·7H 2O (0.3444g, 1.2mmol), zinc nitrate hydrate Zn(NO 3 ) 2 4.5H 2 O (0.3790g, 2.0mmol), thioacetamide (TAA) (0.4508g, 6.0mmol) and cetyltrimethylammonium bromide (CTAB) (0.3g, 0.82mmol) were sequentially added to 70mL of After it was completely dissolved in ionized water by magnetic stirring, it was transferred to a 100mL autoclave and sealed, heated to 160°C, and the reaction time was 12h. After the reaction kettle is cooled to room temperature, centrifuge and alternately wash 3 times with deionized water and absolute ethanol to ensure that CTAB is fully washed, dry at 60°C and grind to obtain a yellow product;

[0024] (2) Preparation of flaky lanthanum ferrite LaFeO by sol-gel method 3 : Ferric nitrate Fe(NO 3 ) 3 (0.4837g, 2.0mmol), lanthanum nitrate La(NO 3 ) 3 (0.65g, 2.0mmol) and citric acid (0.7686g, 4.0mmol) were successively disso...

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Abstract

The invention relates to a preparation method of a LaFeO3 / ZnIn2S4 composite photocatalyst. The preparation method comprises the following steps: preparing flower ball-shaped zinc indium sulfide ZnIn2S4 through a hydrothermal method, preparing flake-shaped lanthanum ferrite LaFeO3 through a sol-gel method and preparing a LaFeO3 / ZnIn2S4 composite material through an in-situ growth method. The preparation method is simple; the preparation condition is easily controlled; the prepared LaFeO3 / ZnIn2S4 composite catalyst has the advantages of no secondary pollution and high photocatalytic efficiency,and has a certain application value.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and application, and relates to a LaFeO 3 / ZnIn 2 S 4 Preparation method of composite photocatalyst. Background technique [0002] Lanthanum ferrite (LaFeO 3 ) because of the natural perovskite (CaTiO 3 ) structure, considered to be a typical ABO 3 type perovskite oxides. The crystal structure of a typical perovskite-type oxide belongs to the cubic crystal system. The A-site elements are mostly rare earth elements or alkaline-earth metal elements with large ionic radii, occupying the body center of the cube, while the B-site elements are mostly transition-state metal elements with small ionic radii, occupying the apex of the cubic unit cell, and O occupies the The location of the midpoint of the cube's edges. Therefore, ideal perovskite crystals have better symmetry. Since the A-bit element may not satisfy: r A + r B =1.4142(r B + r O ), where: r x Represents the rad...

Claims

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Application Information

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IPC IPC(8): B01J27/04C02F1/30C02F101/30
CPCC02F1/30B01J27/04C02F2305/10C02F2101/30B01J35/39
Inventor 梁倩崔赛楠李忠玉
Owner CHANGZHOU UNIV
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