11105-11-6Relevant articles and documents
Microwave–assisted synthesis of nanoscale tungsten trioxide hydrate with excellent photocatalytic activity under visible irradiation
Cai, Feng–Ying,Cao, Wei,Lü, Jian,Li, Taohai,Liu, Heng–Xin,Shen, Yanhua,Xu, Jian–Ying,Yu, Xu–Teng
, (2020)
Tungsten trioxide hydrate (WO3?1/3H2O) nanoparticles (NPs) were prepared via a microwave–assisted synthetic pathway by using Na2WO4·2H2O and PdCl2 as precursors. Microstructure and morphology of as–prepared WO3?1/3H2O NPs were investigated through X–ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier transform infrared (FT–IR) spectra, while porosity and bandgap through specific surface area and UV–vis absorption spectroscopy. It was found that Pd2+ ions played a crucial role in the formation of WO3?1/3H2O NPs, and thus a possible formation mechanism was proposed based on the growth processes. The photocatalytic property of WO3?1/3H2O NPs was evaluated on the basis of Rhodamine B (RhB) degradation in aqueous solutions under simulated visible irradiation. Photocatalytic experimental results indicated that as–prepared WO3?1/3H2O NPs exhibited much more superior photocatalytic activity by contrast to that of the commercial WO3.
Improvement of electroactive β phase nucleation and dielectric properties of WO3·H2O nanoparticle loaded poly(vinylidene fluoride) thin films
Thakur, Pradip,Kool, Arpan,Bagchi, Biswajoy,Hoque, Nur Amin,Das, Sukhen,Nandy, Papiya
, p. 62819 - 62827 (2015/08/06)
Tungsten oxide hydrate (WO3·H2O) nanoparticles (NPs) have been prepared by simple hydrazine hydrate reduction. X-ray diffraction, UV-Visible spectroscopy and field emission electron scanning microscopy confirm the formation of phase pure orthorhombic WO3·H2O NPs. Thereafter, poly(vinylidene fluoride) (PVDF) thin films doped with different amounts of WO3·H2O NPs (1-15 mass%) have been prepared via a simple solution-casting method to verify the role of the NPs on the enhancement of electroactive β phase crystallization and dielectric properties of WO3·H2O NP-PVDF thin films. The interface between the NPs and the polymer matrix takes a vital role in improving β phase nucleation and dielectric properties of the WO3·H2O NP modified PVDF thin films. Strong electrostatic or ion-dipole interaction between the negatively charged NP surfaces and -CH2 dipoles of the polymer matrix at the interface effectively improves the electroactive β phase nucleation and dielectric properties of the nanocomposite thin films.
