Multifunctional quaternized chitosan@surface plasmon resonance Ag/N-TiO2 core-shell microsphere for synergistic adsorption-photothermal catalysis degradation of low-temperature wastewater and bacteriostasis under visible light

Urchinlike Carbon-Coated TiO2 Microspheres with Enhanced Photothermal–Photocatalytic Hydrogen Evolution Performance for Full-Spectrum Solar Energy Conversion

“…Furthermore, three peaks at 533.2, 531.8, and 529.6 eV were observed in the O 1s high-resolution XPS spectrum (Figure 4c) for the C−O, Ti− OH, and Ti−O bonds, respectively, indicating the generation of oxygen vacancies. 40 The Ti 2p high-resolution XPS spectrum (Figure 4d) for the TiO 2 @CS-0.05 comprises two symmetrical peaks with binding energies (BEs) of 458.5 and 464.2 eV, which can be assigned to Ti 2p 3/2 and Ti 2p 1/2 respectively. Meanwhile, the splitting between Ti 2p 1/2 and Ti 2p 3/2 is 5.7 eV, indicating a normal oxidation state of Ti 4+ in the TiO 2 @CS.…”

“…C elements in pure TiO 2 might be caused by inadvertent carbon-based contaminants. 40 The C 1s high-resolution XPS spectrum of TiO 2 @CS-0.05 is shown in Figure 4b. The C1S peak can be fitted to three components, 284.8, 285.8, and 288.7 eV, which correspond to the standard C, the oxygen bound species C−O and CO, respectively.…”

“…As shown in Figure a, the fully scanned spectra demonstrated the presence of Ti, O, and C elements in pure TiO 2 and TiO 2 @CS-X, respectively, which is consistent with the mapping results. C elements in pure TiO 2 might be caused by inadvertent carbon-based contaminants . The C 1s high-resolution XPS spectrum of TiO 2 @CS-0.05 is shown in Figure b.…”

Self-Assembly of Soluble Chitosan Derivatives Nanoparticles for Vaccine: Synthesis, Characterization and Evaluation

“…According to the XRD curve of N-2-HACC shown in Figure 4 , the intensity of diffraction absorption peak was sharply reduced at about 20.39°, while the peak of diffraction absorption was hardly visible at about 11.84°. It is suggested that the introduction of quaternary ammonium salt groups weakened the hydrogen bonding of CS molecules, with the original crystal structure of CS destroyed, thus causing the crystallization peak to vanish [ 30 ]. However, water molecules are more likely to be close to such loose amorphous macromolecules, and the hydrophilic groups contained in N-2-HACC synthesized after CS modification can form hydrogen bonds with water molecules again, thus improving the solubility of N-2-HACC and achieving high water solubility.…”

A Mini Review on Yolk-Shell Structured Nanocatalysts

“…Core-shell nanomaterials have received enormous attention owing to their unique structure related properties and the broad variety of ways in which they can be applied in energy storage (Xie et al, 2015;Lu et al, 2019), sensing (Gong et al, 2019), cancer therapy (Wang et al, 2018b;He et al, 2020), and in particular, catalysis (Gawande et al, 2015;Das et al, 2020;Salvatore et al, 2020). By tuning the intrinsic properties of the core or shell, a variety of nanocatalysts, with active centers that are properly shielded by permeable shells, are ready to be designed and fabricated (Murugesan et al, 2020;Wang et al, 2020). Noveron et al originally developed a green and sustainable methodology with metal nanoparticles encapsulated in tea leaves (Ahsan et al, 2020a) or tissue papers (Ahsan et al, 2020b,c).…”