Abstract
Nanostructured materials incorporated with biological reducing agents have shown significant potential for use in bactericidal applications. Such materials have also demonstrated considerable efficacy to counter effects of chemical toxicity. In this study, nanostructured molybdenum disulfide (MoS2) was doped with various concentrations (2.5, 5, 7.5, 10 wt%) of zirconium (Zr) using a hydrothermal route in order to assess its antimicrobial and catalytic potential. Doped and control samples were characterized with various techniques. X-ray diffraction (XRD) analysis confirmed the presence of the hexagonal phase of MoS2 and identification of various functional groups and characteristic peaks (Mo bonding) was carried out using FTIR spectra. Micrographs obtained from FESEM and HR-TEM showed a sheet-like surface morphology, while agglomeration of nanosheets was observed upon doping with nanoparticles. To seek further clarity regarding the layered features of S–Mo–S planes, the defect densities and electronic band structure of pure MoS2 and doped MoS2 samples were investigated through Raman analysis. Optical properties of Zr-doped MoS2 nanosheets were assessed using a UV-vis spectrophotometer and the results indicated a red-shift, i.e., movement of peaks towards longer wavelengths, of the material. Dynamics of migration and recombination of excited electron–hole pairs were investigated using PL spectroscopy, which was also used to confirm the presence of exfoliated nanosheets. In addition, the synthetic dye degradation potential of pure and doped samples was investigated in the presence of a reducing agent (NaBH4). It was noted that doped MoS2 showed superior catalytic activity compared to undoped MoS2. The nanocatalyst synthesized in this study exhibited enhanced antibacterial activity against E. coli and S. aureus at high concentrations (0.5, 1.0 mg/50 μl). The present study suggests a cost-effective and environmentally friendly material that can be used to remove toxins such as synthetic dyes and tannery pollutants from industrial wastewater.
Highlights
IntroductionPopulation continues to grow, an estimated 750 million people lack access to safe and clean drinking water
Lack of availability of clean potable water is an environmental concern that is shared at a global level
2.7 Antibacterial activity Antibacterial evaluation of Zr-doped MoS2 nanosheets was conducted using Gram-positive (G +ve) S. aureus and Gramnegative (G Àve) bacteria E. coli directly isolated from caprine mastitis
Summary
Population continues to grow, an estimated 750 million people lack access to safe and clean drinking water. Escherichia coli (E. coli) a family member of ESKAPE pathogen causes death of 1.3 million children under the age of ve due to diarrhea, which is mainly transmitted from contaminated water To mitigate this enormous loss, a continuous effort is required to develop new antibiotics that could control the bacterial growth of ESKAPE pathogens. In this respect, 2D materials are potential candidates due to their superior antibacterial activity, e.g., graphene oxide (GO) and chemically exfoliated MoS2 have been shown to work efficiently against several microorganisms[16]. The synthesize product can be considered as a superior candidate for use in antimicrobial applications developed in the near future
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
