有序 Sb:SnO2 宿主-客体体系增强赤铁矿光电化学水分解效率。
Enhanced photoelectrochemical water splitting efficiency of a hematite-ordered Sb:SnO2 host-guest system.
机构信息
Department of Materials Science and Engineering, WW4-LKO University of Erlangen-Nuremburg, Martensstr. 7, 91058 Erlangen (Germany).
出版信息
ChemSusChem. 2014 Feb;7(2):421-4. doi: 10.1002/cssc.201301120. Epub 2014 Jan 21.
Host-guest systems such as hematite/SnO2 have attracted a great deal of interest as photoanodes for photoelectrochemical water splitting. In the present work we form an ordered porous tin oxide layer formed by self-organizing anodization of Sn films on a FTO substrate. Subsequently the anodic tin oxide nanostructure is doped with antimony (ATO) by a simple impregnation and annealing treatment, and then decorated with hematite using anodic deposition. Photoelectrochemical water splitting experiments show that compared to conventional SnO2 nanostructures, using a Sb doped nanochannel SnO2 as a host leads to a drastic increase of the water splitting photocurrent response up to 1.5 mA cm(-2) at 1.6 V (vs. RHE) in 1 M KOH under AM 1.5 (100 mW cm(-2) ) conditions compared to 0.04 mA cm(-2) for the non-Sb doped SnO2 scaffold.
作为光电化学水分解的光阳极，赤铁矿/SnO2 等主客体系统引起了极大的兴趣。在本工作中，我们通过在 FTO 基底上自组织阳极氧化 Sn 薄膜形成有序多孔氧化锡层。随后，通过简单的浸渍和退火处理将阳极氧化锡纳米结构掺杂锑（ATO），然后使用阳极沉积在其上修饰赤铁矿。光电化学水分解实验表明，与传统的 SnO2 纳米结构相比，使用掺杂 Sb 的纳米通道 SnO2 作为主体，在 1 M KOH 中在 AM 1.5（100 mW cm(-2)）条件下在 1.6 V（相对于 RHE）下，水分解光电流响应急剧增加至 1.5 mA cm(-2)，而未掺杂 Sb 的 SnO2 支架仅为 0.04 mA cm(-2)。
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