Enhanced photocatalytic activity of BiVO4/Pt/PtOx photocatalyst: The role of Pt oxidation state

Supported nanostructured photocatalysts: the role of support-photocatalyst interactions

“…Moreover, the reactive oxygen species (ROS) such as HO ⋅ and O 2 ⋅− produced during the process as a result of oxidation of water by holes (H 2 O + h + (VB) → HO ⋅ + H + ) or reduction of molecular oxygen can also kill/oxidize bacteria and other microorganisms [13,14]. This forms the basis of photocatalytic environmental remediation and sustainable energy generation [1,15].…”

“…Despite the promising potential and exciting future of photocatalysis, attainment of its full potential and practical or commercial applications of the technology to address real-world problems are hindered by certain limitations such as low light absorption in the visible region, poor charge transfer kinetics, fast recombination of photogenerated e − /h + pairs, as well as limitations inherent to the nanometric nature of the photocatalysts particles, including their agglomeration and difficult handling/recovery of suspended photocatalyst particles from aqueous solution. ) , which take part in the degradation of pollutants and killing microbes A variety of effective approaches have been introduced to address the problems mentioned above and improve photocatalytic efficiency, including the development of (Z/Sscheme) heterojunctions [4,[17][18][19][20][21], metals/non-metals doping [22], and the use of co-catalysts [12,15,23]. Notably, the problem of recovery of the nanostructured photocatalysts for repeated use, which is the prerequisite for commercial applications of the technology, can be overcome by supporting the photocatalyst particles on some suitable substrates, often in a support@photocatalyst core@shell configuration (Fig.…”

Metal-Free g-C3N4/Nanodiamond Heterostructures for Enhanced Photocatalytic Pollutant Removal and Bacteria Photoinactivation

“…The photon flux was calibrated to 200 mW cm −2 using a reference cell, as described elsewhere [9,41]. Once under irradiation, the solution was kept under magnetic stirring and the concentration of the remaining MB was monitored through UV−Vis spectrophotometry at 664 nm [42] every 20 min up to 160 min. Adsorption of the MB dye was investigated by C/C i curves, where C is the concentration of MB at the time "t" and C i is the initial concentration of MB.…”

Pt/PtOx Nanoparticle-Decorated BiVO4 Pinelike Structure for Enhanced Sulfamethoxazole Mineralization under Visible Light Irradiation

“…40,41 We also observed that the positions of Bi 3+ and V 5+ in Pt/PtO x /BiVO 4 composites had a slightly shifted toward higher binding energy, indicating the interaction between Pt/PtO x NPs and BiVO 4 . 25,32 The deconvolution analysis of the O 1s peak suggests the presence of two distinct 2d). 31,42 Upon the introduction of Pt/PtO x decoration onto the BiVO 4 surface, the third peak emerges at 530.3 eV, which can be assigned to the platinum oxides.…”

“…Second, at the metal− semiconductor interface, a Schottky junction can be established to productively hamper the back transfer of photoexcited electrons which are trapped by the noble metal. 23,25 Recently, facet engineering has been utilized to generate reduction and oxidation facets for electron and hole accumulation. This behavior is caused by distinct energy band levels of individual facets in crystals.…”