This indicates that the effects of AM modification were attributable to the changes in the crystallinity and the morphology of Ta(3)N(5) rather than to catalytic effects. The AM salt modification was compatible with the loading of an oxygen evolution cocatalyst such as CoO(x), yielding an apparent quantum efficiency of 5.2% at 500-600 nm. Compared with conventional Ta(3)N(5), Ta(3)N(5) nitrided from AM-salt-modified Ta(2)O(5) had better crystallinity and smaller particles with smoother surfaces, and most importantly, demonstrated a six-fold improvement in photocatalytic activity for oxygen evolution under visible light. This problem was successfully rectified in this study by modifying the surface of the starting Ta(2)O(5) with a small amount of alkaline metal (AM) salts.
However, the photocatalytic performance of Ta(3)N(5) has been far below expectations because insufficient crystallization upon thermal nitridation of the oxide precursors enhances undesirable charge recombination limiting the quantum efficiency of the photocatalytic reaction. Ta(3)N(5) is a promising nitride semiconductor photocatalyst for solar water splitting because it has band edge potentials capable of producing hydrogen and oxygen from water under visible light (λ < 590 nm). Synthesis of graphene-like nanocomposites on the surface of porous silicon Of the atomically rough nc-PS forces and the influence these forces on the energy of lowtemperature In the report features of the specific role Porous-Si nanocrystallites and, in this case, nanoscale effects that occur on local parts of theĪtomically rough nc-PS surface play a specific role. Synthesis of graphene-like nanocomposites on nc-PS is due to the excess surface energy of The porous silicon nanocrystallites (nc-PS) is considered. * E-mail: The process of low temperature synthesis of graphene-like nanocomposites films on Nanocomposites on porous silicon (Review)ġ Nazarbayev University, Republic of KazakhstanĢ National Nuclear Research University (MEPhI), Moscow, Russian Federationģ Purdue University, West-Lafayette, IN USA Energy of low-temperature synthesis of graphen-like carbon
0 kommentar(er)
