Issue 43, 2021

Sulfur-doping tuning oxygen vacancies in ultrathin 2D Ni–V mixed metal oxides for exceptional oxidase mimic and antibacterial applications

Abstract

The development of effective and low-cost enzyme-like nanomaterials is an essential issue for antibacterial applications. Herein, novel ultrathin Ni–V mixed metal oxides (MMOs) doped with sulfur(S) were successfully designed. After calcination with S powder in a N2 atmosphere instead of in the air without S powder, the results proved that the obtained S-doping Ni–V MMOs remain ultrathin (5 nm in thickness) with much more vacancies and enhance oxidase (OXD) and peroxidase (POD) mimic activities sharply. More importantly, Ni–V MMO with a Ni/V molar ratio of 2 : 1 calcinated at 400 °C in the presence of sulfur shows the best OXD/POD mimic activity. The S-doping Ni–V MMOs also exhibit an antibacterial action on mode Gram-negative bacteria via generating ROS (mainly ˙O2) in the presence of H2O2. It is also easily performed and highly specific. The unique 2D hierarchical nanostructure and sulfur doping endow the S-doping Ni–V MMO with abundant active sites and superb OXD/POD-like activity. The strategy expands the possibilities for boosting the catalytic activity of LDH-derived MMO nanomaterials.

Graphical abstract: Sulfur-doping tuning oxygen vacancies in ultrathin 2D Ni–V mixed metal oxides for exceptional oxidase mimic and antibacterial applications

Supplementary files

Article information

Article type
Paper
Submitted
01 sep. 2021
Accepted
08 oct. 2021
First published
26 oct. 2021

J. Mater. Chem. C, 2021,9, 15445-15451

Sulfur-doping tuning oxygen vacancies in ultrathin 2D Ni–V mixed metal oxides for exceptional oxidase mimic and antibacterial applications

Y. Wang, C. Chen and D. Zhang, J. Mater. Chem. C, 2021, 9, 15445 DOI: 10.1039/D1TC04131B

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