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Photodegradation of organic pollutants using N-titanium oxide catalyst
S S Shinde1, C H Bhosale2, K Y Rajpure2
1Electrochemical Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, Maharashtra, India; Department of Chemical Engineering, Hanyang University, 426-791, Republic of Korea.
Journal of Photochemistry and Photobiology. B, Biology
|December 3, 2014
Summary
This study demonstrates N-titanium dioxide photoelectrocatalysis for degrading aromatic pollutants. The method efficiently reduces chemical oxygen demand (COD) and total organic carbon (TOC) under solar irradiation, offering a promising water purification technique.
Area of Science:
- Environmental Science
- Materials Science
- Electrochemistry
Background:
- Aromatic compounds are common pollutants in wastewater.
- Persistent organic pollutants require efficient degradation methods.
- Photoelectrocatalysis offers a potential solution for water purification.
Purpose of the Study:
- To investigate the photoelectrocatalytic degradation of aromatic compounds using N-titanium dioxide.
- To evaluate the efficiency of the process under solar irradiation.
- To determine kinetic parameters and assess mineralization.
Main Methods:
- Thin N-titanium dioxide layers on conductive glass substrates.
- Backside illuminated flow-through photoelectrochemical reactors.
- Application of external electrical bias to suppress recombination.
- Analysis of COD, TOC, and optical extinction.
Main Results:
- N-titanium dioxide exhibited persistent reaction rates for degrading salicylic acid, 4-chlorophenol, benzoic acid, and oxalic acid.
- Kinetic parameters correlated with the decrease in optical extinction.
- Degradation efficiency was assessed through COD and TOC reduction.
Conclusions:
- N-titanium dioxide photoelectrocatalysis is effective for aromatic compound degradation.
- The process shows potential for achieving complete mineralization of pollutants.
- Solar-driven photoelectrocatalysis is a viable strategy for environmental remediation.
