In the present work, visible light active bismuth oxyiodide (BiOI) was immobilized on a commercial, non-conductive support (an Al2O3 based ceramic paper) using a novel two-step spray coating technique and investigated with different characterization methods (e.g., SEM, Raman, XPS). Our main goal was to eliminate the separation costs after the photocatalytic measurement and investigate the chemical relevance and opportunity to use this technique in the industry. Our as-prepared uniform BiOI layer had similar properties to the well-known reference BiOI powder. The Raman and XPS measurements confirmed that the enriched amount of the surface iodine defined the color and as well the band gap of the BiOI layer. The durable BiOI layers have prominent photocatalytic activity under UV and visible light irradiation as well. The scale-up procedure proved that the designed BiOI coated paper was reusable and potentially applicable in the industry by straightforward scale-up, which is due to the elaborated non-conventional BiOI coverage estimation method. This immobilization technique could open several opportunities for immobilizing many other visible light active photocatalysts with simple materials and low cost.
The complexation equilibria between
Mg2+ and d-gluconate (Gluc–)
ions are of particular importance in modeling the chemical speciation
in low- and intermediate-level radioactive waste repositories. NMR
measurements and potentiometric titrations conducted at 25 °C
and 4 M ionic strength revealed the formation of the MgGluc+, MgGlucOH0, MgGluc(OH)2–, and Mg3Gluc2(OH)40 complexes.
The trinuclear species provides indirect evidence for the existence
of multinuclear magnesium(II) hydroxido complexes, whose formation
was proposed earlier but has not been confirmed yet. Additionally,
speciation calculations demonstrated that MgCl2 can markedly
decrease the solubility of thorium(IV) at low ligand concentrations.
Regarding the structure of MgGluc+, both IR spectra and
density functional theory (DFT) calculations indicate the monodentate
coordination of Gluc–. By the potentiometric data,
the acidity of the water molecules is higher in the MgGluc+ and MgGlucOH0 species than in the Mg(H2O)62+ aqua ion. On the basis of DFT calculations,
this ligand-promoted hydrolysis is caused by strong hydrogen bonds
forming between Gluc– and Mg(H2O)62+. Conversely, metal-ion-induced ligand deprotonation
takes place in the case of calcium(II) complexes, giving rise to salient
variations on the NMR spectra in a strongly alkaline medium.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.