Co3O4 Nanoparticles Modified TiO2 Nanotube Arrays with Improved Photoelectrochemical Performance

被引：8

作者：

Cao, Huazhen ^{[1
]}

Lu, Yueheng ^{[1
]}

Ning, Wei ^{[1
]}

Zhang, Huibin ^{[1
]}

Zheng, Guoqu ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Zhejiang, Peoples R China

来源：

RUSSIAN JOURNAL OF APPLIED CHEMISTRY | 2019年 / 92卷 / 01期

关键词：

TiO2 nanotube arrays; Co3O4; nanoparticles; photoelectrocatalysis; methyl orange degradation; PHOTOCATALYTIC ACTIVITY; THIN-FILMS; DEGRADATION; FABRICATION; COMPOSITES; DEPOSITION; CU2O/TIO2; OXIDATION; STRATEGY;

D O I：

10.1134/S1070427219010099

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Co3O4 modified TiO2 nanotube arrays (TiO2-NTs) were successfully fabricated by electrodeposition and thermal oxidation process. The prepared samples were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopic (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-visible diffuse reflectance spectroscopy. The photoelectrocatalytic properties of as-prepared samples were investigated under visible light and UV-vis light irradiation. Meanwhile, taking methyl orange aqueous solution as target substrate for photoelectrocatalytic degradation experiments, the degradation rate under UV-vis light irradiation and dark condition were evaluated. The prepared Co3O4/TiO2-NTs exhibited much higher photoelectrochemical activity than TiO2-NTs under visible light irradiation and UV-vis light irradiation. The degradation rate of methyl orange on Co3O4/TiO2-NTs electrode reaches 90.7% under applied potential of 1.3 V and UV-vis light irradiation for 10 h, which is only 53.4% on TiO2-NTs electrode. The improved performance could be attributed to the higher photo-generated carrier concentration and carrier mobility.

引用

页码：64 / 70

页数：7