Tungsten oxide (WO), MXene, and an WO/MXene nanocomposite were synthesized to study their photocatalytic and biological applications. Tungsten oxide was synthesized by an easy and cost-effective hydrothermal method, and its composite with MXene was prepared through the sonication method. The synthesized tungsten oxide, MXene, and its composite were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR), energy-dispersive X-ray analysis (EDX), and Brunauer-Emmett-Teller (BET) for their structural, morphological, spectral, elemental and surface area analysis, respectively. The crystallite size of WO calculated from XRD was ~10 nm, the particle size of WO was 130 nm, and the average thickness of MXene layers was 175 nm, which was calculated from FESEM. The photocatalytic activity of as-synthesized samples was carried out for the degradation of methylene blue under solar radiation, MXene, the WO/MXene composite, and WO exhibited 54%, 89%, and 99% photocatalytic degradation, respectively. WO showed maximal degradation ability; by adding WO to MXene, the degradation ability of MXene was enhanced. Studies on antibacterial activity demonstrated that these samples are good antibacterial agents against positive strains, and their antibacterial activity against negative strains depends upon their concentration. Against positive strains, the WO/MXene composite's inhibition zone was at 7 mm, while it became 9 mm upon increasing the concentration. This study proves that WO, MXene, and the WO/MXene nanocomposite could be used in biological and environmental applications.
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http://dx.doi.org/10.3390/nano12040713 | DOI Listing |
ACS Appl Mater Interfaces
January 2025
Department of Physics, National Institute of Technology Nagaland, Chumukedima, Dimapur 797103, India.
An exceedingly porous and interwoven fibrous structure was achieved in this study by interlocking titanium carbide (TiC) MXenes onto the electrospun mats using poly(vinylidene fluoride) (PVDF) as the base polymer. The fibrous membrane was further modified with the inclusion of zinc oxide (ZnO) and tungstite (WO·HO) nano/microstructures via annealing and hydrothermal approaches. Through these strategic interfaced morphological developments in novel TiC/ZnO/WO·HO heterostructures, our findings reveal enhanced wettability and charge-segregation desirable for promoting oil-water separation and photoreactivity, respectively.
View Article and Find Full Text PDFMicromachines (Basel)
December 2024
College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
This study introduces the development of a W-M electrochromic film, characterized by a "coral"-like TiO@WO heterostructure, synthesized via a hydrothermal process leveraging the inherent instability of MXene. The film showcases exceptional electrochromic performance, with a coloring response time of 2.8 s, a bleaching response time of 4.
View Article and Find Full Text PDFLangmuir
January 2025
Institute of Novel Semiconductors, Shandong University, Jinan 250000, China.
With the increasing demand for food safety monitoring, the development of efficient, convenient, and green gas sensors has become a current research hotspot. Triboelectric nanogenerator (TENG) as a triethylamine sensor is a cutting-edge strategy for detection without the need for an additional power source. In this study, synthesized WO/MXene materials were prepared and bilayer thin films of carbon quantum dots (CPDs)-WO/MXene TENG.
View Article and Find Full Text PDFJ Colloid Interface Sci
December 2024
School of Environment, South China Normal University, Guangzhou 510006, China; MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou 510006, China. Electronic address:
We report here a BiWO/TiCT@Ag (BT@Ag) photothermal photocatalyst for efficient CO reduction with tunable CH selectivity. Incorporation of TiCT MXene creates well-defined heterointerfaces between BiWO and TiCT and converts thermal energy upon light illumination via photothermal effect, which contributes to a mitigation of the recombination of photo-induced charge carries for a high electron mobility. Density functional theory calculations substantiate that TiCT functions as the adsorption site and active center where the transferred electrons are effectively involved in CO reduction for enhanced CH selectivity.
View Article and Find Full Text PDFACS Appl Mater Interfaces
November 2024
College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, PR China.
Gas sensing is pivotal in critical areas such as industrial production and food safety. This study explores the gas classification capabilities of MXene-based gas sensors. Pure VCT MXene and an MXene/WO nanocomposite were synthesized, and MXene-based gas sensors were integrated into a 2 × 2 rudimentary electronic nose array.
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