TY - JOUR
T1 - Thiol functionalized covalent organic framework for highly selective enrichment and detection of mercury by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry
AU - Sun, Qianqian
AU - Ma, Wende
AU - Dan, Ouyang
AU - Li, Guorong
AU - Yang, Yixin
AU - Yan, Xi
AU - Su, Hang
AU - Lin, Zian
AU - Cai, Zongwei
N1 - This work was supported by the National Natural Science Foundation of China (91843301 and 21974021) and the Key Program of the National Natural Science Foundation of China (22036001).
Publisher Copyright:
© The Royal Society of Chemistry 2021.
PY - 2021/5/7
Y1 - 2021/5/7
N2 - A spherical thiol-functionalized covalent organic framework (COF-SH) was designedviaa facile thiol-yne click reaction of a alkynyl-terminated COF and pentaerythritol tetra(3-mercaptopropionate). The COF-SH was explored as a new adsorbent for the selective enrichment of Hg2+. The as-prepared COF-SH exhibited a uniform mesoporous structure, a high abundance of binding sites, and good chemical stability, which endow it with great performance for the adsorption of Hg2+and its corresponding maximum adsorption capacity was up to 617.3 mg g−1. Furthermore, the adsorption behavior of Hg2+on the COF-SH wasin good agreement with the Langmuir and pseudo-second-order models. The influences of adsorbent dosage, pH, selectivity, and reusability of the COF-SH on Hg2+adsorption were also investigated. Besides this, the COF-SH showed high selectivity towards Hg2+even in the presence of a high concentration of K+, Na+, Ca2+, Mg2+and Zn2+metal ions. Using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), the corresponding limit of detection (LOD) of Hg2+was determined at very low concentrations of 80 pg mL−1(equal to 396 amoL μL−1). In addition, the COF-SH was successfully applied to rapidly enrich and sensitively detect Hg2+in industrial sewage, with recoveries in the range of 101.8-103.4%, demonstrating the promising potential of COF-SH as an effective adsorbent for use in environmental sample pretreatment.
AB - A spherical thiol-functionalized covalent organic framework (COF-SH) was designedviaa facile thiol-yne click reaction of a alkynyl-terminated COF and pentaerythritol tetra(3-mercaptopropionate). The COF-SH was explored as a new adsorbent for the selective enrichment of Hg2+. The as-prepared COF-SH exhibited a uniform mesoporous structure, a high abundance of binding sites, and good chemical stability, which endow it with great performance for the adsorption of Hg2+and its corresponding maximum adsorption capacity was up to 617.3 mg g−1. Furthermore, the adsorption behavior of Hg2+on the COF-SH wasin good agreement with the Langmuir and pseudo-second-order models. The influences of adsorbent dosage, pH, selectivity, and reusability of the COF-SH on Hg2+adsorption were also investigated. Besides this, the COF-SH showed high selectivity towards Hg2+even in the presence of a high concentration of K+, Na+, Ca2+, Mg2+and Zn2+metal ions. Using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), the corresponding limit of detection (LOD) of Hg2+was determined at very low concentrations of 80 pg mL−1(equal to 396 amoL μL−1). In addition, the COF-SH was successfully applied to rapidly enrich and sensitively detect Hg2+in industrial sewage, with recoveries in the range of 101.8-103.4%, demonstrating the promising potential of COF-SH as an effective adsorbent for use in environmental sample pretreatment.
UR - http://www.scopus.com/inward/record.url?scp=85105403430&partnerID=8YFLogxK
U2 - 10.1039/d1an00282a
DO - 10.1039/d1an00282a
M3 - Journal article
C2 - 33949450
AN - SCOPUS:85105403430
SN - 0003-2654
VL - 146
SP - 2991
EP - 2997
JO - Analyst
JF - Analyst
IS - 9
ER -