Thermocatalytic hydrogen peroxide generation and environmental disinfection by Bi2Te3 nanoplates

Yu-Jiung Lin, Imran Khan, Subhajit Saha, Chih-Cheng Wu, Snigdha Roy Barman, Fu-Cheng Kao and Zong-Hong Lin ()
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Yu-Jiung Lin: National Tsing Hua University
Imran Khan: National Tsing Hua University
Subhajit Saha: National Tsing Hua University
Chih-Cheng Wu: National Tsing Hua University
Snigdha Roy Barman: National Tsing Hua University
Fu-Cheng Kao: National Tsing Hua University
Zong-Hong Lin: National Tsing Hua University

Nature Communications, 2021, vol. 12, issue 1, 1-11

Abstract: Abstract The highly reactive nature of reactive oxygen species (ROS) is the basis for widespread use in environmental and health-related fields. Conventionally, there are only two kinds of catalysts used for ROS generation: photocatalysts and piezocatalysts. However, their usage has been limited due to various environmental and physical factors. To address this problem, herein, we report thermoelectric materials, such as Bi2Te3, Sb2Te3, and PbTe, as thermocatalysts which can produce hydrogen peroxide (H2O2) under a small surrounding temperature difference. Being the most prevalent environmental factors in daily life, temperature and related thermal effects have tremendous potential for practical applications. To increase the practicality in everyday life, bismuth telluride nanoplates (Bi2Te3 NPs), serving as an efficient thermocatalyst, are coated on a carbon fiber fabric (Bi2Te3@CFF) to develop a thermocatalytic filter with antibacterial function. Temperature difference induced H2O2 generation by thermocatalysts results in the oxidative damage of bacteria, which makes thermocatalysts highly promising for disinfection applications. Antibacterial activity as high as 95% is achieved only by the treatment of low-temperature difference cycles. The current work highlights the horizon-shifting impacts of thermoelectric materials for real-time purification and antibacterial applications.

Date: 2021
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DOI: 10.1038/s41467-020-20445-0

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