Oxygen Vacancy Engineering of Bi4Ti3O12 Piezocatalyst Driving In Situ H2O2 Evolution for Self-Cycled Fenton-Like Degradation of Pollutants

被引：0

作者：

Qiu, Xiaojuan ^{[1
]}

Hao, Aize ^{[2
]}

Hu, Shanshan ^{[2
]}

Cao, Yali ^{[1
]}

Xie, Jing ^{[1
]}

Hu, Jindou ^{[1
]}

Lu, Zhenjiang ^{[1
]}

机构：

[1] Xinjiang Univ, Coll Chem, State Key Lab Chem & Utilizat Carbon Based Energy, Urumqi 830017, Xinjiang, Peoples R China

[2] Sichuan Univ Sci & Engn, Sch Chem Engn, Sichuan Engn Technol Res Ctr High Salt wastewater, Natl Engn Lab Circular Econ, Zigong 643000, Peoples R China

来源：

INORGANIC CHEMISTRY | 2025年

基金：

中国国家自然科学基金;

关键词：

HETEROJUNCTION; PHOTOCATALYST;

D O I：

10.1021/acs.inorgchem.4c05548

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In this work, we synthesized a Bi4Ti3O12 piezocatalyst with surface oxygen vacancy (BTO-Ov) to facilitate in situ hydrogen peroxide (H2O2) production and to establish a piezocatalytic self-cycled Fenton-like system for degradation of pollutants. Notably, the H2O2 evolution rate from the BTO-Ov catalyst reaches 558.8 mu mol g-1 h-1 when utilizing pure water, significantly exceeding the rate obtained from pure BTO (274.6 mu mol g-1 h-1). Furthermore, this rate can be enhanced to 1091.6 mu mol g-1 h-1 with the addition of ethanol as a sacrificial agent and endows robust stability. In the piezocatalytic self-cycled Fenton-like system (BTO-Ov/Fe0), degradation efficiency of the methyl orange (MO) dye pollutant can achieve 91.9% within 20 min, coupled with a high kinetic coefficient of 0.117 min-1, indicating excellent catalytic activity. Relevant characterization results reveal that the introduction of oxygen vacancy improves piezoelectricity, reduces the band gap of BTO, enhances charge carrier transfer and separation, and facilitates a dual-channel reaction mechanism, thereby achieving superior piezocatalytic performance. This work not only facilitates the in situ synthesis of valuable chemicals but also offers a cost-effective and sustainable approach for wastewater purification.

引用

页码：6172 / 6182

页数：11

共 56 条

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