Photochemical synthesis, characterization, photoinduced electron transfer, charging and discharging in copper-titania colloid

Conventional and cryo-synchronous luminescence spectra of orthorhombic calcium titanate

“…Further, we reported using the in-situ PL emission and excitation spectroscopy in the studies of transfer of photoexcited charge in titania-based photocatalytic colloids [36]. We also reported radiative transitions in the nanocrystalline binary nitrogen and transition metal promoted TiO 2 , as found by the PL emission spectroscopy [37].…”

“One-Pot” Synthesis and Photocatalytic Hydrogen Generation with Nanocrystalline Ag(0)/CaTiO3 and in Situ Mechanistic Studies

“…36 This mechanism was recently reported by us for composite Cu(0)/TiO 2 photocatalytic colloids prepared by the "one-pot" method. 20 Third, this is photoexcitation of surface plasmon resonance (SPR) in supported metallic silver nanoparticles followed by charge injection to the semiconductor. 37 We decided to determine if bandgap narrowing as possible mechanism no.…”

“…In mechanistic studies of photocatalysts with supported nanoparticles of coinage metals other than gold, the in situ methods are preferred where possible effects of ambient air are excluded. 20 To our knowledge, the PL spectra of flash-frozen photocatalytic suspension after illumination with photocatalytic light source were not reported. We decided to utilize the "conventional" PL emission spectra from midgap states in CaTiO 3 (Figure 4) to learn about the photoexcitation induced charge relaxation and charge separation in CaTiO 3 and Ag(0)/ CaTiO 3 photocatalysts in situ, i.e.…”

“…We also reported in situ PL spectroscopy in the studies of transfer of photoexcited charge in titania-based photocatalytic colloids. 20 We describe herein the "one-pot" synthesis of nanocrystalline Ag(0)/ CaTiO 3 photocatalyst in suspension, its in situ photocatalytic testing for hydrogen generation, characterization by the complementary methods, and both in situ and ex situ mechanistic studies.…”

“…We reported synthesis, characterization and testing nanocrystalline Ag(0)/TiO 2 sorbents operating in solution at room temperature. − Recently, we reported an ex situ synthesis, characterization, and photocatalytic hydrogen generation by the new family of binary promoted N–M–TiO 2 photocatalysts (N = nitrogen; M = none, Cu, Ni, Co, Cr). We also reported in situ PL spectroscopy in the studies of transfer of photoexcited charge in titania-based photocatalytic colloids . We describe herein the “one-pot” synthesis of nanocrystalline Ag(0)/CaTiO 3 photocatalyst in suspension, its in situ photocatalytic testing for hydrogen generation, characterization by the complementary methods, and both in situ and ex situ mechanistic studies.…”