ZIF-8/TiO2 Composite Mesocrystals: Preparation and Photocatalytic Activity
Source abstract
Abstract
The microstructure, particle size and specific surface area of TiO2 are crucial factors influencing its photocatalytic activity.Mesocrystals represent a type of superstructural material formed by inorganic nanoparticles aligned along a common crystallographic axis, holding significant research potential in photocatalysis.This study employed ammonium hexafluorotitanate and boric acid as titanium precursors and fluorine ion scavengers, respectively, using a blend of anhydrous ethanol and deionized water as the reaction medium.NH4TiOF3 mesocrystals precursors were prepared by a facile green method.Subsequently, washing with boric acid solution enabled the transformation of NH4TiOF3 mesocrystals into TiO2 mesocrysals through topotaxial conversion.Ultimately, the TiO2 mesocrystals were functionalized with ZIF-8 nanoparticles, and the photocatalytic degradation activity of the resulting ZIF-8/TiO2 composite mesocrystals was studied.Experimental finding showed that ZIF-8 nanoparticles can uniformly nucleate on the surface of TiO2 mesocrystals, resulting in a relatively dense coating layer.The ZIF-8/TiO2 composite photocatalyst exhibits a reduced specific surface area and a narrower band gap, and the separation efficiency of photogenerated electrons and holes is also improved to a certain extent.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Polyoxometalates: Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
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