Brookite TiO2 as an active photocatalyst for photoconversion of plastic wastes to acetic acid and simultaneous hydrogen production: Comparison with anatase and rutile

被引：6
作者：
Nguyen T.T. [1 ,2 ]
Edalati K. [1 ,2 ]
机构：
[1] WPI, International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka
[2] Mitsui Chemicals, Inc. - Carbon Neutral Research Center (MCI-CNRC), Kyushu University, Fukuoka
来源：
Chemosphere | 2024年 / 355卷
基金：
日本学术振兴会;
关键词：
Hydrogen fuel; Microplastics; Nuclear magnetic resonance (NMR); Photocatalysis; Titanium dioxide (TiO[!sub]2[!/sub]);
D O I：
10.1016/j.chemosphere.2024.141785
中图分类号：
学科分类号：
摘要：
Photoreforming is a clean photocatalytic technology for simultaneous plastic waste degradation and hydrogen fuel production, but there are still limited active and stable catalysts for this process. This work introduces the brookite polymorph of TiO2 as an active photocatalyst for photoreforming with an activity higher than anatase and rutile polymorphs for both hydrogen production and plastic degradation. Commercial brookite successfully converts polyethylene terephthalate (PET) plastic to acetic acid under light. The high activity of brookite is attributed to good charge separation, slow decay and moderate electron trap energy, which lead to a higher generation of hydrogen and hydroxyl radicals and accordingly enhanced photo-oxidation of PET plastic. These results introduce brookite as a stable and active catalyst for the photoconversion of water contaminated with microplastics to value-added organic compounds and hydrogen. © 2024 Elsevier Ltd
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