Electrochemical Technologies for Detecting and Degrading Benzoquinone Using Diamond Films
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2019-06-11 |
| Journal | ChemElectroChem |
| Authors | Edilson do ValeâJĂșnior, Alexsandro J. dos Santos, Djalma Ribeiro da Silva, Ana S. Fajardo, Carlos A. MartĂnezâHuitle |
| Institutions | Universidade Federal do Rio Grande do Norte |
| Citations | 31 |
Abstract
Section titled âAbstractâAbstract In this work, the detection and quantification of pâbenzoquinone (BQ) was performed by differential pulse voltammetry (DPV) with a diamond film sensor. The calibration curve and the limits of detection and quantification for BQ were estimated. DPV was compared to highâperformance liquid chromatography (HPLC) analysis, leading to a satisfactory result in terms of stability and sensitive response. As a novel aim, a combined electrochemical method for environmental application has been developed to oxidize and detect BQ using diamond films. A set of galvanostatic electrochemical oxidation experiments with 130 mL of BQ solution were accomplished in order to understand the effect of current density, the concentration of the pollutant and the initial pH using different electrolytes with similar conductivity. The optimal operating conditions were achieved at 33.3 mA cm â2 , 100 mg L â1 of BQ at pH 5.0 with 50 mM Na 2 SO 4 . Additionally, the evolution of shortâchain carboxylic acids of that test was followed over time in order to suggest a possible degradation route. The results were described and discussed in the light of the existing literature.