TY - JOUR
T1 - 3D-printed lab-in-a-syringe voltammetric cell based on a working electrode modified with a highly efficient Ca-MOF sorbent for the determination of Hg(II)
AU - Kokkinos, Christos
AU - Economou, Anastasios
AU - Pournara, Anastasia
AU - Manos, Manolis
AU - Spanopoulos, Ioannis
AU - Kanatzidis, Mercouri
AU - Tziotzi, Thomais
AU - Petkov, Valeri
AU - Margariti, Antigoni
AU - Oikonomopoulos, Panagiotis
AU - Papaefstathiou, Giannis S.
N1 - Funding Information:
This work was partially supported by the Special Account for Research Grants (SARG) of the National and Kapodistrian University of Athens (NKUA) . The Bodossaki Foundation is gratefully acknowledged for donating the TGA to NKUA. The research work, by A. D. Pournara and M. J. Manos, was supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “First Call for H.F.R.I. Research Projects to support Faculty members and Researchers and the procurement of high-cost research equipment grant” (Project Number: 348). Metal analysis was performed at the Northwestern University Quantitative Bio-element Imaging Center generously supported by NASA Ames Research Center NNA06CB93 G. MGK would like to acknowledge grant NSF DMR-1708254. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
Funding Information:
This work was partially supported by the Special Account for Research Grants (SARG) of the National and Kapodistrian University of Athens (NKUA). The Bodossaki Foundation is gratefully acknowledged for donating the TGA to NKUA. The research work, by A. D. Pournara and M. J. Manos, was supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the ?First Call for H.F.R.I. Research Projects to support Faculty members and Researchers and the procurement of high-cost research equipment grant? (Project Number: 348). Metal analysis was performed at the Northwestern University Quantitative Bio-element Imaging Center generously supported by NASA Ames Research Center NNA06CB93 G. MGK would like to acknowledge grant NSF DMR-1708254. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/10/15
Y1 - 2020/10/15
N2 - This work combines, for the first time, 3D-printing technology and a highly efficient metal organic framework (Ca-MOF) as an electrode modifier to produce a novel fully integrated lab-in-a-syringe device for the sensitive determination of Hg(II) by anodic stripping voltammetry. The specific Ca-MOF ([Ca(H4L)(DMA)2]·2DMA where H6L is the N,N’-bis(2,4-dicarboxyphenyl)-oxalamide and DMA is the N,N-dimethylacetamide) shows an exceptional Hg(II) sorption capability over a wide pH range and its mechanism is elucidated via spectroscopic and X-ray diffraction studies. The voltammetric lab-in-a-syringe device is fabricated through a single-step process using a dual extruder 3D printer and is composed of a vessel integrating two thermoplastic conductive electrodes (serving as the counter and pseudo-reference electrodes) and of a small detachable 3D-printed syringe loaded with a graphite paste/Ca-MOF mixture (which serves as the working electrode). After optimization of the fabrication and operational variables, a limit of detection of 0.6 μg L−1 Hg(II) was achieved, which is comparable or lower than that of existing sensors (plastic 3D-printed, gold and MOF-based electrodes). The adoption of 3D printing technology in combination with the highly efficient Ca-MOF enables the fabrication of a simple, low-cost and sensitive electrochemical sensor for Hg(II), which is suitable for on-site applications.
AB - This work combines, for the first time, 3D-printing technology and a highly efficient metal organic framework (Ca-MOF) as an electrode modifier to produce a novel fully integrated lab-in-a-syringe device for the sensitive determination of Hg(II) by anodic stripping voltammetry. The specific Ca-MOF ([Ca(H4L)(DMA)2]·2DMA where H6L is the N,N’-bis(2,4-dicarboxyphenyl)-oxalamide and DMA is the N,N-dimethylacetamide) shows an exceptional Hg(II) sorption capability over a wide pH range and its mechanism is elucidated via spectroscopic and X-ray diffraction studies. The voltammetric lab-in-a-syringe device is fabricated through a single-step process using a dual extruder 3D printer and is composed of a vessel integrating two thermoplastic conductive electrodes (serving as the counter and pseudo-reference electrodes) and of a small detachable 3D-printed syringe loaded with a graphite paste/Ca-MOF mixture (which serves as the working electrode). After optimization of the fabrication and operational variables, a limit of detection of 0.6 μg L−1 Hg(II) was achieved, which is comparable or lower than that of existing sensors (plastic 3D-printed, gold and MOF-based electrodes). The adoption of 3D printing technology in combination with the highly efficient Ca-MOF enables the fabrication of a simple, low-cost and sensitive electrochemical sensor for Hg(II), which is suitable for on-site applications.
KW - 3D-printed electrode
KW - Electrochemical sensing
KW - Mercury
KW - Metal-organic frameworks
KW - Sorption
UR - http://www.scopus.com/inward/record.url?scp=85087407155&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2020.128508
DO - 10.1016/j.snb.2020.128508
M3 - Article
AN - SCOPUS:85087407155
VL - 321
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
M1 - 128508
ER -