Immobilization of Perylenetetracarboxylic Dianhydride on Al2O3 for Efficiently Photocatalytic Sulfide Oxidation
Jiahao Liang, Jie Wang, Hao Hou, Qingzhu Xu, Wei Liu, Chenliang Su, Hongli Sun
TL;DR
This paper shows how attaching a photocatalyst to Al2O3 improves its reusability and efficiency in oxidizing sulfides.
Contribution
A novel method of immobilizing PTCDA on Al2O3 to enhance photocatalytic performance and recyclability.
Findings
Immobilization on Al2O3 significantly improved the recyclability of PTCDA.
The immobilized PTCDA showed enhanced photocatalytic activity for sulfide oxidation.
Al2O3 facilitated strong adsorption of thioanisole, boosting the catalytic cycle.
Abstract
Perylenetetracarboxylic dianhydride (PTCDA) derivatives have received significant attention as molecule photocatalysts. However, the poor recyclability of molecule-type photocatalysts hinders their widespread applications. Herein, immobilization of PTCDA on Al2O3 was achieved by simply physical mixing, which not only dramatically improved their recyclability, but also surprisingly improved the reactivity. A mechanism study suggested that the photo-exited state (PTCDA*) of PTCDA could promote the oxidation of thioanisole to generate PTCDA•−, which sequentially reduces oxygen to furnish superoxide radicals to achieve the catalytic cycle. Herein, the immobilization support Al2O3 was able to facilitate the strong adsorption of thioanisole, thereby boosting the photocatalytic activity. This work provides a new insight that the immobilization of organic molecular photocatalysts on those…
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Taxonomy
TopicsAdvanced Photocatalysis Techniques · Covalent Organic Framework Applications · Chemical Synthesis and Reactions