title: Investigation on the application of titania nanorod arrays to the determination of chemical oxygen demand.
abstract: In the present paper, the TiO2 nanorod arrays electrode was developed as a sensor for the determination of chemical oxygen demand (COD) based on a photoelectrochemical degradation principle. Effects of common parameters, such as applied potential, light intensity and pH on its analytical performance were investigated. Under the optimized conditions, the nanorod arrays electrode was successfully applied in the COD determination for both synthetic and real samples. In the COD determination, the proposed method can achieve a practical detection limit of 18.3mgL(-1) and a linear range of 20-280mgL(-1). Furthermore, the results obtained by the proposed method were well correlated with those obtained using the conventional (i.e., dichromate) COD determination method. The main advantages of this COD determination method were its simplicity, long term stability and environmental friendly (corrosive and toxic reagents not consumed). This work would open a new application area (COD determination) of the TiO2 nanorod arrays.
authors: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
authors: Chao
authors: C
authors: Wang
authors: Jiancheng
authors: J
authors: Wu
authors: Peifang
authors: P
authors: Wang
authors: Yanhui
authors: Y
authors: Ao
authors: Jun
authors: J
authors: Hou
authors: Jin
authors: J
authors: Qian
mesh_terms: D057919:Biological Oxygen Demand Analysis / Q000295:instrumentation / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry*; D010100:Oxygen / Q000032:analysis / Q000378:metabolism*; D055668:Photochemical Processes; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D014025:Titanium; D010100:Oxygen