Work

A Simple Flow Injection Sensing System for the Real-Time On-Line Determination of Chemical Oxygen Demand Based on 3D Au-NPs/TiO2 Nanotube Arrays

Year: 2019

Type: article

Abstract: 3D TiO2 nanotube arrays loaded with Au nanoparticles (3D Au-NPs/TNTAs) were prepared to effectively enhance the photoelectrocatalytic properties. A simple flow injection sensing system was proposed for the real-time on-line determination of chemical oxygen demand using the 3D Au-NPs/TNTAs electrode. The proposed photoelectrochemical oxidative degradation principle of the sensing system was analyzed and validated by the representative organic compounds with known COD values at a potential bias 1.5 V under UV illumination. A practical detection limit of the sensing system is 0.18 mg/L and the linear range is 1.92 - 3360 mg/L under the optimum conditions. In the experimental process, the sensing system exhibits good long-term stability and reproducibility.

Source: Frontiers in Materials

DOI: 10.3389/fmats.2019.00238

Authors: Hewei Si, Xidong Zhang, Shiwei Lin

Institutions: Hainan University, State Key Laboratory of Marine Resource Utilization in South China Sea

Language: English

Topic: Water Quality Monitoring and Analysis

Subfield: Waste Management and Disposal

Field: Environmental Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $2,490