Affordable Access

deepdyve-link
Publisher Website

A two-step gas/liquid strategy for the production of N-doped defect-rich transition metal dichalcogenide nanosheets and their antibacterial applications.

Authors
  • Wang, Tao1
  • Zhang, Xiao2
  • Mei, Linqiang3
  • Ma, Dongqing2
  • Liao, You3
  • Zu, Yan2
  • Xu, Peng2
  • Yin, Wenyan2
  • Gu, Zhanjun3
  • 1 College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics and CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology of China, Chinese Academy of Sciences, Beijing 100049, China. , (China)
  • 2 Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics and CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology of China, Chinese Academy of Sciences, Beijing 100049, China. , (China)
  • 3 Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics and CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology of China, Chinese Academy of Sciences, Beijing 100049, China and Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China. [email protected] [email protected] , (China)
Type
Published Article
Journal
Nanoscale
Publisher
The Royal Society of Chemistry
Publication Date
Apr 02, 2020
Identifiers
DOI: 10.1039/d0nr00192a
PMID: 32239043
Source
Medline
Language
English
License
Unknown

Abstract

Herein, we developed a general two-step gas expansion and exfoliation strategy based on a urea-assisted hydrothermal process combined with sonication exfoliation for the production of nitrogen (N)-doped plus defect-rich transition metal dichalcogenide (TMD) nanosheets (NSs) such as N-MoS2 and N-WS2 NSs. The interlayers of bulk MoS2 (or WS2) were expanded with urea molecules dissolved in distilled water, which were decomposed to NH3 during the hydrothermal process. Simultaneously, sulfur atoms were partly replaced by N atoms to achieve N doping. Subsequently, sonication exfoliation of the urea-treated bulk MoS2 (or WS2) promoted the production of defect-rich NSs. Importantly, the defect-rich N-MoS2 and N-WS2 NSs exhibit enhanced peroxidase-like catalytic activity after being captured by bacteria, and can catalyze hydrogen peroxide (H2O2) to produce more toxic hydroxyl radicals (˙OH) than non-N-doped MoS2 or WS2 NSs. As a result, the N-MoS2 or N-WS2 NSs were capable of effectively killing Gram-negative ampicillin resistant Escherichia coli (Ampr E. coli) and Gram-positive endospore-forming Bacillus subtilis (B. subtilis) and promoting bacteria-infected wound healing. This work not only provides a simple, universal exfoliation strategy for producing defect-rich N-doped TMD NSs but also provides a promising catalytic antibacterial option and has potential for many other catalytic applications.

Report this publication

Statistics

Seen <100 times