Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 392, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.122278
Keywords
Co4S3/Co3O4 nanotubes; Kirkendall effect; Oxidase and peroxidase; Broad spectrum sterilization; Biocompatibility
Categories
Funding
- Natured Science Foundation of China [41776090, 41976032]
- National Key Research and Development Program of China [2016YFC1400605]
- Highend users Program of Kexue [KEXUE2019GZ01]
- Key Research and Development Program of Shandong Province [2018GHY115038]
- AoShan Talent Program - Qingdao National Laboratory for Marine Science and Technology
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Novel Co4S3/Co3O4 composite nanotubes were first time successfully synthesized through the control of Na2S treatment of Co(CO3)(0.35)Cl-0.20(OH)(1.10) precursor and testified to having both oxidase-like and peroxidase-like catalytic activities. Through nanoscale Kirkendall effect, acicular precursor was vulcanized to form Co4S3/Co3O4 nanotubes (NTs). Co4S3/Co3O4 NTs exhibit great properties such as smaller K-m and higher V(max )than natural horseradish peroxidase, favorable selectivity and ideal stability. Co4S3/Co3O4 NTs with promising biocompatibility can realize spectral sterilization towards Escherichia coll. and Staphylococcus sciuri in the presence of low level H2O2. It turned to be that superoxide anion radical catalyzed by Co4S3/Co3O4 NTs not only oxidizes 3, 3', 5, 5'-tetramethylbenzidine in the catalytic process but also eliminates gram-bacteria during sterilization. The successful synthesis of biofunctional Co4S3/Co3O4 NTs can serve as significant applications of new energy and environmental catalysis.
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