A CdS/ZnSe/TiO2 nanotube array and its visible light photocatalytic activities

• Published in: Journal of colloid and interface science Vol. 462; pp. 389 - 396
• Main Authors: Nguyen, VanManh, Li, Weili, Pham, VanHuan, Wang, Lijia, Sheng, Pengtao, Cai, Qingyun, Grimes, Craig
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 15.01.2016
• Subjects: CdS; Methyl orange; Photocatalysis; TiO2 nanotube arrays; ZnSe; TiO2 nanotube arrays; CdS; ZnSe; Methyl orange; Photocatalysis; TiO nanotube arrays
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2015.10.005

[Display omitted] •The novel CdS/ZnSe/TiO2 NTA photoelectrode is fabricated.•Highly visible light photocatalytic activities of CdS/ZnSe/TiO2 NTA were prepared.•Photocatalytic process with excellent stability was established. A novel CdS/ZnSe/TiO2 nanotube array (NTA) photoelectrode was prepared by deposition of ZnSe nanoparticles (NPs) using pulse electrodeposition technique onto a TiO2 NTA. By successive ion layer adsorption and reaction (SILAR), CdS quantum dots (QDs) deposit onto a ZnSe/TiO2 NTA photoelectrode. The as-prepared CdS/ZnSe/TiO2 NTA photoelectrode performance is significantly improved, which not only greatly extends spatial separation of charges, but also enhance the utilization efficiency of visible-light. This system exhibits excellent charges transport property. The maximum photocurrent density of an 8.25mAcm−2 was observed in the CdS/ZnSe/TiO2 NTA photoelectrode, which is 37.5, 15.86 and 1.56 times higher than bare TiO2 NTA, ZnSe/TiO2 NTA, and CdS/TiO2NTA photoelectrodes, respectively. The photocatalytic activity of CdS/ZnSe/TiO2 NTA is tested by the degradation of methyl orange (MO) in distilled water under solar light irradiation of 100mW/cm2. Within about 120min of irradiation, 90.05% MO are removed.