Photoelectrochemical properties of FTO/p-NiO electrode induced by UV light irradiation

被引:4
|
作者
da Silva, Marcelo Rodrigues [1 ]
Leao Neto, Vanildo Souza [2 ]
Lucilha, Adriana Campano [2 ]
de Andrade Scalvi, Luis Vicente [3 ]
Dall'Antonia, Luiz Henrique [2 ]
机构
[1] Sao Paulo State Univ, UNESP, CTI, Engn Coll, Sao Paulo, Brazil
[2] Univ Estadual Londrina, Dept Chem, UEL, Londrina, Parana, Brazil
[3] Sao Paulo State Univ, UNESP, FC, Dept Phys, Sao Paulo, Brazil
基金
巴西圣保罗研究基金会;
关键词
Photoelectrochemical properties; FTO/p-NiO; Electrode; Methylene blue; NICKEL-OXIDE; THIN-FILMS; ELECTROCHROMIC PROPERTIES; NANOSTRUCTURED NIO; PHOTOCATALYTIC DEGRADATION; ELECTRICAL-PROPERTIES; TEMPERATURE; OXIDATION; NANOPARTICLES; FABRICATION;
D O I
10.1007/s11581-014-1300-3
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Photoelectrochemical properties of p-nickel oxide (NiO) thin film deposited on fluorine-doped tin oxide (FTO) electrode, by combination of co-precipitation in aqueous media along with the dip-coating process, were investigated by cyclic voltammetry and chronoamperometry techniques in sodium sulfate (Na2SO4) electrolyte solution. The electrochemical characterization measurements have shown that the FTO/p-NiO electrode presents sensitivity to UV light, as observed by the increased photo-induced current, exposed to a more negative potential. The photoelectrochemical parameters obtained were photocurrent response time (a dagger t (1)), photocurrent decay time (a dagger t (0)), and photocurrent density stability (j (ph), j (light on) -aEuro parts per thousand j (light off)). Besides, this electrode shows excellent performance for methylene blue degradation under UV light irradiation condition, with estimated k (obs) value of 170 x 10(-4) min(-1), which is nine times higher than the dark condition and about three times higher than NiO powder catalyst. Results presented here allow concluding that the p-NiO thin film stands as an important electrode material with technological potential to be used directly in environmental preservation.
引用
收藏
页码:1407 / 1415
页数:9
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