Method for synthesizing MOF derivative semiconductor heterojunction material by solvothermal method

Abstract

The invention discloses a method for synthesizing an MOF derivative semiconductor heterojunction material by a solvothermal method, which belongs to the field of catalyst materials. The method specifically comprises the following steps: carrying out hydrothermal crystallization on a mixed reaction system of a soluble ligand organic matter dissolved in an organic solvent and tetra-n-butyl titanate;and washing and drying the obtained product, carrying out continuous two-step calcination in air, dissolving the calcined product and a metal compound in an alkaline solution containing an alcohol solvent, carrying out hydrothermal crystallization for a period of time, washing for multiple times, and finally drying the solid to obtain the target product. The MOF derivative semiconductor heterojunction material product obtained by the method is high in chemical stability and excellent in photocatalytic performance, and the preparation method has the characteristics of simple process flow, lowcost and high product yield.

Description

[0001] Technical field [0002] The invention belongs to the field of catalyst materials, and relates to a method for preparing a novel catalyst material, in particular to a method for preparing a MOF derivative semiconductor heterojunction material synthesized by a solvothermal method. Background technique [0003] Metal-organic frameworks (MOFs), also known as porous coordination polymers (PCPs), are synthesized from secondary building blocks (SBUs), metal cation salts or clusters, and multidentate organic ligands with coordination-type linkages. 2D or 3D porous crystalline materials. Due to its metal center, highly ordered porous structure, uniform pore size and environment, extremely high specific surface area and functional organic linking groups, tailorability, and ultra-high specific surface area, MOFs are excellent catalyst templates. . In recent years, MOFs derivatives have shown potential application prospects in many research fields, especially the in-depth resear...

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Problems solved by technology

[2] At present, there are many reports on the synthesis of semiconductor heterojunction materials, Subha N et al. [3] Using titanium isopropoxide hydrolysis and strontium nitrate as titanium source and strontium source to hydrothermally synthesize SrTiO3 / TiO2 heterojunction materials, this method heats and crystallizes the mixed solution to obtain titanium oxide with rutile crystal form and different morphology Regular and less porous, resulting in limited catalytic performance of the product

Meanwhile, XW Lou et al. [4] During the preparation process, the Ti-Fe-O nanoparticles are converted into a heterostructured Fe2TiO5 / TiO2 by a post-annealing process. The heterogeneous structure obtained in this way cannot ensure the uniform distribution of active sites so as to affect the subsequent photocatalytic reaction.

R Li et al. [5] Using TiO2 nanotubes as templates and reactants, BaTiO3 / TiO2 heterostructure nanotube arrays were prepared by in situ hydrothermal method. accomplish

So far, the preparation of semiconductor heterojunction materials by Ti-MOF by solvothermal method has not been reported

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