Photocatalytic hydrogen production by Au–MxOy (M Ag, Cu, Ni) catalysts supported on TiO2

Photocatalytic degradation of ciprofloxacin using mono- (Au, Ag and Cu) and bi- (Au–Ag and Au–Cu) metallic nanoparticles supported on TiO2 under UV-C and simulated sunlight

“…Table 1 compares the nominal and the actual loading of metals deposited on the TiO 2 surface. For both mono-and bi-metallic catalysts, the measured loadings of Au and Cu metals were close to the nominal ones, evidencing the high efficiency of deposition when urea is used as basifying agent; this is consistent with results previously reported [20,29,33,39]. Unlike Au and Cu, differences were found in the measured loadings of Ag compared with the nominal ones for both mono-and bi-metallic materials.…”

“…2a) showed that Au atoms on the freshly synthesized material (i.e., prior to the thermal treatment) occurred in the oxidized state as Au (III), in both mono-and bi-metallic materials. A low temperature peak centered at 120 • C (from 100 • C to 165 • C) evidenced the reduction of the Au (III) species [39]. Ag atoms reached the metallic state during deposition-precipitation, thus no signal of H 2 consumption was observed in the TPR spectra for both mono-and bi-metallic Ag modified materials.…”

Characterization and mechanism of MoS2/CdS composite photocatalyst used for hydrogen production from water splitting under visible light

“…But ultraviolet only takes up 4% of the incoming solar energy [3][4][5][6][7]. In order to promote the solar energy conversion efficiency, the essential way is to explore visible-lightdriven photocatalysts.…”

Cu–TiO2 systems for the photocatalytic H2 production: Influence of structural and surface support features

“…Traditionally, highly active photocatalysts are based on TiO 2 doped with noble metal ions (Pt, Au, Pd) acting as co-catalysts for charge trapping sites and avoid the electron-hole recombination processes [6][7][8][9][10]. Due to the high cost of such co-catalysts, transition metal doping with Cu, Fe, Co or Ni have recently turned as a promising option [11][12][13][14][15][16][17][18].…”