Gurgul Magdalena, Kozieł Marcin, Zaraska Leszek
Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
Materials (Basel). 2021 Apr 3;14(7):1777. doi: 10.3390/ma14071777.
Nanoporous tin oxide layers obtained via anodic oxidation of metallic tin at the potential of 4 V in the alkaline electrolyte (1 M NaOH) were soaked in distilled water for various durations (from 2 h to 120 h) to verify the influence of water-enabled crystallization on the morphology, composition, and related optical and photoelectrochemical properties of such kind of anodic SnO. Although water soaking generally contributes to more stoichiometric and crystalline tin oxide, it was confirmed that at the initial stages of the water-induced dissolution-redeposition process, material exhibits enhanced photoelectrochemical performance under simulated sunlight irradiation. However, long-time exposure to water results in a gradual widening of the material's band gap, shifting of the photoelectrochemical spectra towards higher energies, and almost complete deterioration of the photoelectrochemical activity under sunlight irradiation.
通过在碱性电解质（1 M NaOH）中于4 V电位下对金属锡进行阳极氧化获得的纳米多孔氧化锡层，在蒸馏水中浸泡不同时长（从2小时到120小时），以验证水引发的结晶对这类阳极SnO的形貌、组成以及相关光学和光电化学性质的影响。尽管水浸泡通常有助于形成更化学计量比和结晶的氧化锡，但已证实，在水诱导的溶解-再沉积过程的初始阶段，材料在模拟太阳光照射下表现出增强的光电化学性能。然而，长时间暴露于水会导致材料的带隙逐渐变宽，光电化学光谱向更高能量偏移，并且在太阳光照射下光电化学活性几乎完全丧失。
