| Full text | |
| 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 |