Next Article in Journal
Design, Synthesis and Evaluation of Naphthalimide Derivatives as Potential Anticancer Agents for Hepatocellular Carcinoma
Previous Article in Journal
Synthesis, Characterization and Antibacterial Studies of N-(Benzothiazol-2-yl)-4-chlorobenzenesulphonamide and Its Neodymium(III) and Thallium(III) Complexes
Previous Article in Special Issue
Surface Modification of a Nanoporous Carbon Photoanode upon Irradiation
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Molecules 2017, 22(2), 337; doi:10.3390/molecules22020337

A Photocatalytic Rotating Disc Reactor with TiO2 Nanowire Arrays Deposited for Industrial Wastewater Treatment

1
Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China
2
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510000, China
3
Sinopec Fushun Research Institute of Petroleum and Petrochemicals (FRIPP), China Petroleum & Chemical Corporation, Fushun 113006, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Michael K. H. Leung
Received: 12 December 2016 / Revised: 6 February 2017 / Accepted: 14 February 2017 / Published: 22 February 2017
(This article belongs to the Special Issue Solar Photocatalysis)
View Full-Text   |   Download PDF [16869 KB, uploaded 22 February 2017]   |  

Abstract

A photocatalytic rotating disc reactor (PRD-reactor) with TiO2 nanowire arrays deposited on a thin Ti plate is fabricated and tested for industrial wastewater treatment. Results indicate that the PRD-reactor shows excellent decolorization capability when tested with methyl orange (>97.5%). Advanced oxidation processes (AOP), including photocatalytic oxidation and photolytic reaction, occurred during the processing. Efficiency of the AOP increases with reduction in light absorption pathlength, which enhanced the photocatalytic reaction, as well as by increasing oxygen exposure of the wastewater thin film due to the rotating disc design. It is found that, with a small dosage of hydrogen peroxide, the mineralization efficiency of industrial biodegraded wastewater can be enhanced, with a superior mineralization of >75% total organic carbon (TOC) removal. This is due to the fact that the TiO2 photocatalysis and hydrogen peroxide processes generate powerful oxidants (hydroxyl radicals) that can strongly improve photocatalytic oxidation efficiency. Application of this industrial wastewater treatment system is benefited from the TiO2 nanowire arrays, which can be fabricated by a mild solvothermal method at 80 °C and under atmospheric pressure. Similar morphologies and microstructures are found for the TiO2 nanowire arrays deposited on a large metal Ti disc, which makes the wastewater treatment process more practical and economical. View Full-Text
Keywords: TiO2 nanowire arrays; photocatalytic rotating reactor; wastewater treatment TiO2 nanowire arrays; photocatalytic rotating reactor; wastewater treatment
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Li, F.; Szeto, W.; Huang, H.; Li, J.; Leung, D.Y.C. A Photocatalytic Rotating Disc Reactor with TiO2 Nanowire Arrays Deposited for Industrial Wastewater Treatment. Molecules 2017, 22, 337.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]

Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top