Spin polarization induced by atomic strain of MBene promotes the ·O2– production for groundwater disinfection

Zhaoli Liu, Wenzhe Gao, Lizhi Liu, Yixuan Gao, Cui Zhang, Long Chen, Fan Lv, Jiafeng Xi, Ting Du, Linpin Luo, Junchen Zhuo, Wentao Zhang, Yanwei Ji, Yizhong Shen (), Wen Liu (), Jianlong Wang (), Mingchuan Luo and Shaojun Guo ()
Additional contact information
Zhaoli Liu: Northwest A&F University
Wenzhe Gao: Northwest A&F University
Lizhi Liu: Northwestern Polytechnical University
Yixuan Gao: Peking University
Cui Zhang: Northwest A&F University
Long Chen: Peking University
Fan Lv: Peking University
Jiafeng Xi: Northwest A&F University
Ting Du: Northwest A&F University
Linpin Luo: Northwest A&F University
Junchen Zhuo: Northwest A&F University
Wentao Zhang: Northwest A&F University
Yanwei Ji: Northwest A&F University
Yizhong Shen: School of Food & Biological Engineering
Wen Liu: Peking University
Jianlong Wang: Northwest A&F University
Mingchuan Luo: Peking University
Shaojun Guo: Peking University

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Superbugs in groundwater are posing severe health risks through waterborne pathways. An emerging approach for green disinfection lies at photocatalysis, which levers the locally generated superoxide radical (·O2−) for neutralization. However, the spin-forbidden feature of O2 hinders the photocatalytic generation of active ·O2−, and thus greatly limited the disinfection efficiency, especially for real groundwater with a low dissolved oxygen (DO) concentration. Herein, we report a class of strained Mo4/3B2-xTz MBene (MB) with enhanced adsorption/activation of molecular O2 for photocatalytic disinfection, and find the strain induced spin polarization of In2S3/Mo4/3B2-xTz (IS/MB) can facilitate the spin-orbit hybridization of Mo sites and O2 to overcome the spin-forbidden of O2, which results in a 16.59-fold increase in ·O2− photocatalytic production in low DO condition (2.46 mg L-1). In particular, we demonstrate an In2S3/Mo4/3B2-xTz (50 mg)-based continuous-flow-disinfection system stably operates over 62 h and collects 37.2 L bacteria-free groundwater, which represents state-of-the-art photodisinfection materials for groundwater disinfection. Most importantly, the disinfection capacity of the continuous-flow-disinfection system is 25 times higher than that of commercial sodium hypochlorite (NaOCl), suggesting the practical potential for groundwater purification.

Date: 2025
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DOI: 10.1038/s41467-024-55626-8

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