Photoelectrocatalytic microfluidic reactors utilizing hierarchical TiO2 nanotubes for determination of chemical oxygen demand. Issue 55 (20th May 2016)

• Record Type: Journal Article
• Authors: Heng, Weixin; Zhang, Wei; Zhang, Qinghong; Wang, Hongzhi; Li, Yaogang
• Is Part Of: RSC advances. Volume 6:Issue 55(2016)
• Page Start: 49824
• Page End: 49830
• Publication Date: 2016-05-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra09230f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A novel and highly sensitive microfluidic device which integrated hierarchical TiO2 nanotubes exhibited an improved detection efficiency for determination of COD. Abstract : In this work, a hierarchical TiO2 nanotube (H-TNTs) electrode was successfully fabricated via the anodization of a titanium sheet followed by a hydrothermal process. TiO2 nanoparticles were successfully deposited on the surface of the TiO2 nanotubes (TNTs) which can enhance the light-harvesting capability and surface area of TNTs. In comparison with the pure TNTs, the H-TNT electrode showed a great enhancement in the photocurrent response. Subsequently, the H-TNT electrode was put into a microfluidic device made from polymethyl methacrylate (PMMA) for mineralization of organic compounds. Photocatalytic results showed that a COD detection limit of 1 mg L −1 COD and a linear range of 0–300 mg L −1 COD were achieved by the microfluidic device.