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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Metal Organic Framework-235 (MOF-235) Modified Carbon Paste Electrode for Catechol Determination in Water

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Author(s):
Domingos Batista, Luiz Carlos [1] ; Silva Santos, Thiago Izidoro [1] ; Lima Santos, Jose E. [1] ; da Silva, Djalma Ribeiro [1] ; Martinez-Huitle, Carlos A. [2, 1]
Total Authors: 5
Affiliation:
[1] Univ Fed Rio Grande do Norte, Inst Quim, Lab Eletroquim Ambiental & Aplicada, BR-59078970 Natal, RN - Brazil
[2] UNESP, Inst Chem, Natl Inst Alternat Technol Detect Toxicol Evaluat, POB 355, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Electroanalysis; v. 33, n. 1 SEP 2020.
Web of Science Citations: 0
Abstract

MOF-235 is presented as an orange powder, with crystals of the octahedral formation. It was already used as adsorbent to remove different compounds from water; however, no attempts have been published about the exploration of the MOF-235 application as electrochemical sensor for organic compounds yet. MOF-235 was synthetized and after that, it was characterized by SEM, XRD and FTIR. Graphite electrodes (GEs) were modified with different MOF-235 ratio (5 %, 7 %, 10 %, 12 % and 14 %) and these modified GEs were characterized by cyclic voltammetry (CV) measurements in order to determine the effect of MOF-235 concentration on the current response. Results indicated that, a significant improvement on the current response was attained at MOF-235(10 %)/GE respect to unmodified GE. This behavior is related to the pore structure and multiple active sites on the MOF surface. The performance of the MOF-235(10 %)/GE as electrochemical sensor for detecting catechol was assessed by differential pulse voltammetry (DPV). Catechol detection response of MOF-based sensor provided a detection limit of about 12.79 mu mol L(-1)with a correlation coefficient (R-2) of about 0.9928 ranging from 12 to 514 mu mol L-1. Finally, MOF-235(10 %)/GE was used to determine catechol in real water matrixes. (AU)

FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support Opportunities: Research Projects - Thematic Grants