TY - JOUR
T1 - Bifunctional Amine- and Thiol-Modified Ti3C2TxMXene for Trace Detection of Heavy Metals
AU - Bagheri, Saman
AU - Chilcott, Rylan
AU - Luo, Shengyuan
AU - Sinitskii, Alexander
N1 - Funding Information:
The work was supported by the Nebraska Center for Energy Sciences Research (NCESR). Some experiments were performed using the instrumentation at the facilities supported by the National Science Foundation (NSF ECCS-2025298 and OIA-2044049) and the Nebraska Research Initiative.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2022/10/25
Y1 - 2022/10/25
N2 - Surface functionalization of two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides, also known as MXenes, is a powerful approach for modification of their physical and chemical properties for new applications. In this study, we demonstrate the synthesis of a bifunctional Ti3C2Tx MXene modified with amine and thiol groups through a facile condensation reaction. We successfully employed the resulting NH2/SH-Ti3C2Tx MXene as a solid phase in the ultrasonic-assisted dispersive micro solid-phase extraction (d-μ-SPE) method for the analytical determination of heavy metals at trace levels in food and soil samples. The prepared NH2/SH-Ti3C2Tx MXene showed remarkable performance in the ultrasonic-assisted d-μ-SPE method with limits of detection of 0.12 and 2.30 ng mL-1, with linear dynamic ranges of 0.50-90 μg L-1 and 10-120 μg L-1 for cadmium (Cd2+) and lead (Pb2+) ions, respectively. Furthermore, the extraction efficiencies were greater than 97%, with a relative standard deviation of less than 3% for five separate batch experiments in the determination of 5.0 μg L-1 of Cd2+ and Pb2+. This study shows that NH2/SH-Ti3C2Tx can be used as a simple, rapid, reliable, selective, and sensitive material in the d-μ-SPE method for the trace determination of Cd2+ and Pb2+ in soil and agricultural products. This study demonstrates the utility of MXenes for analytical chemistry and suggests that further advances in methods for the functionalization of MXenes can open new applications for these already exciting materials.
AB - Surface functionalization of two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides, also known as MXenes, is a powerful approach for modification of their physical and chemical properties for new applications. In this study, we demonstrate the synthesis of a bifunctional Ti3C2Tx MXene modified with amine and thiol groups through a facile condensation reaction. We successfully employed the resulting NH2/SH-Ti3C2Tx MXene as a solid phase in the ultrasonic-assisted dispersive micro solid-phase extraction (d-μ-SPE) method for the analytical determination of heavy metals at trace levels in food and soil samples. The prepared NH2/SH-Ti3C2Tx MXene showed remarkable performance in the ultrasonic-assisted d-μ-SPE method with limits of detection of 0.12 and 2.30 ng mL-1, with linear dynamic ranges of 0.50-90 μg L-1 and 10-120 μg L-1 for cadmium (Cd2+) and lead (Pb2+) ions, respectively. Furthermore, the extraction efficiencies were greater than 97%, with a relative standard deviation of less than 3% for five separate batch experiments in the determination of 5.0 μg L-1 of Cd2+ and Pb2+. This study shows that NH2/SH-Ti3C2Tx can be used as a simple, rapid, reliable, selective, and sensitive material in the d-μ-SPE method for the trace determination of Cd2+ and Pb2+ in soil and agricultural products. This study demonstrates the utility of MXenes for analytical chemistry and suggests that further advances in methods for the functionalization of MXenes can open new applications for these already exciting materials.
UR - http://www.scopus.com/inward/record.url?scp=85140658583&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85140658583&partnerID=8YFLogxK
U2 - 10.1021/acs.langmuir.2c02058
DO - 10.1021/acs.langmuir.2c02058
M3 - Article
C2 - 36219834
AN - SCOPUS:85140658583
SN - 0743-7463
VL - 38
SP - 12924
EP - 12934
JO - Langmuir
JF - Langmuir
IS - 42
ER -