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Preparation of porous CuO films from Cu(NO3)2 aqueous solutions containing poly(vinylpyrrolidone) and their photocathodic properties

机译:由含聚乙烯吡咯烷酮的Cu(NO 3 2 水溶液制备多孔CuO薄膜及其光阴极性能

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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.
机译:我们通过浸涂含Cu(NO 3 2 的水溶液通过浸涂制备氧化铜(CuO)光电阴极膜聚乙烯吡咯烷酮(PVP)。 PVP的添加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。通过在所得的CuO薄膜中提供纳米级孔,PVP会热分解,并且孔隙率会随着PVP含量的增加而增加。如此获得的多孔结构导致了在紫外线和可见光(波长:300–800 nm)下的有效光阴极反应。以[PVP] = 0.25 M制备的高度多孔的CuO膜在300和500 nm处的最大入射光子电流效率(IPCE)值分别为8.7%和3.9%。

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