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

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^a Department of Chemistry and Materials Engineering, Kansai University, 3-3-35 Yamate-cho, Suita, Japan
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Abstract

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 nội dung. The porous structure thus obtained led to lớn 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.

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

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Article information

DOI: https://doi.org/10.1039/C6RA26590A
Article type: Paper
Submitted: 10 Nov 2016
Accepted: 12 Mar 2017
First published: 24 Mar 2017
This article is Open Access

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RSC Adv., 2017,7, 18014-18018

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

H. Uchiyama, K. Isobe and H. Kozuka, RSC Adv., 2017, 7, 18014 DOI: 10.1039/C6RA26590A

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