Preparation of porous CuO films from Cu(NO3)2 aqueous solutions containing poly(vinylpyrrolidone) and their photocathodic properties
Preparation of porous CuO films from Cu(NO3)2 aqueous solutions containing poly(vinylpyrrolidone) and their photocathodic properties
复制标题
DOI：
10.1039/c6ra26590a
复制
发表时间：
2017-03
期刊：
影响因子：
3.9
通讯作者：
Hiroaki Uchiyama;K. Isobe;H. Kozuka
中科院分区：
文献类型：
--
作者：
Hiroaki Uchiyama;K. Isobe;H. Kozuka
以聚乙烯吡咯烷酮（PVP）为掺杂剂，采用浸渍法在Cu（NO3）2水溶液中制备了CuO光电阴极薄膜。PVP的加入改变了水性涂料溶液对FTO玻璃基材的润湿性，导致在基材上形成CuO涂层。PVP的热分解为CuO薄膜提供了纳米级的孔隙，且孔隙率随PVP含量的增加而增加。由此获得的多孔结构在UV和可见光照射（波长：300-800 nm）下导致有效的光电阴极反应。在[PVP] = 0.25 M时制备的高度多孔的CuO膜在300和500 nm处分别表现出最大的入射光-电流效率（IPCE）值为8.7%和3.9%。
We prepared cupric oxide (CuO) photocathode films by dip coating from Cu(NO3)2 aqueous solutions containing poly(vinylpyrrolidone) (PVP). The addition of PVP modified the wettability of FTO glass substrates by the aqueous coating solutions, resulting in the formation of CuO coating layers on the substrates. The thermal decomposition of PVP by provided nanoscale pores in the resultant CuO films, and the porosity increased with increasing PVP content. The porous structure thus obtained led to an efficient photocathodic reaction under UV and visible light illumination (wavelength: 300–800 nm). Highly porous CuO films prepared at [PVP] = 0.25 M exhibited the maximum incident photon-to-current efficiency (IPCE) values of 8.7% and 3.9% at 300 and 500 nm, respectively.