Angstrom-confined catalytic water purification within Co-TiOx laminar membrane nanochannels

Chenchen Meng, Baofu Ding, Shaoze Zhang, Lele Cui, Kostya Ken Ostrikov, Ziyang Huang, Bo Yang, Jae-Hong Kim and Zhenghua Zhang ()
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Chenchen Meng: Tsinghua University
Baofu Ding: Shenzhen Institute of Advanced Technology, CAS
Shaoze Zhang: Kunming University of Science and Technology
Lele Cui: Tsinghua University
Kostya Ken Ostrikov: Queensland University of Technology (QUT)
Ziyang Huang: Tsinghua University
Bo Yang: Shenzhen University
Jae-Hong Kim: Yale University
Zhenghua Zhang: Tsinghua University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract The freshwater scarcity and inadequate access to clean water globally have rallied tremendous efforts in developing robust technologies for water purification and decontamination, and heterogeneous catalysis is a highly-promising solution. Sub-nanometer-confined reaction is the ultimate frontier of catalytic chemistry, yet it is challenging to form the angstrom channels with distributed atomic catalytic centers within, and to match the internal mass transfer and the reactive species’ lifetimes. Here, we resolve these issues by applying the concept of the angstrom-confined catalytic water contaminant degradation to achieve unprecedented reaction rates within 4.6 Å channels of two-dimensional laminate membrane assembled from monolayer cobalt-doped titanium oxide nanosheets. The demonstrated degradation rate constant of the target pollutant ranitidine (1.06 ms−1) is 5–7 orders of magnitude faster compared with the state-of-the-art, achieving the 100% degradation over 100 h continuous operation. This approach is also ~100% effective against diverse water contaminates with a retention time of

Date: 2022
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DOI: 10.1038/s41467-022-31807-1

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