TY - JOUR
T1 - Polyoxometalates Immobilized on Covalent Triazine Framework as Efficient Catalysts for Deep Oxidative Desulfurization
AU - Liu, Chengpeng
AU - Li, Zhen
AU - Liu, Huifang
AU - Dong, Jing
AU - Chi, Yingnan
AU - Hu, Changwen
N1 - Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/6/8
Y1 - 2022/6/8
N2 - The immobilized polyoxometalates (POMs) with evenly dispersed catalytic sites, amphiphilic surface, and excellent recyclability are highly desired in many important reactions. Herein, PMo12@CTF has been successfully fabricated by the electrostatic assembly of H3PMo12O40 (PMo12) with porous cationic covalent triazine framework (CTF), where PMo12 are evenly dispersed on the support. The synthesized PMo12@CTF is highly active for oxidative desulfurization of diesel fuel and dibenzothiophene (DBT) can be completely converted in 2 h under mild conditions (40 °C) in a biphasic system. Impressively, the catalytic activity of heterogeneous PMo12@CTF (conversion: 100 %) is much higher than that of homogeneous PMo12 (conversion: 20 %). The control experiments and contact angle measurements reveal that the CTF endows PMo12@CTF with large surface area and amphiphilic feature and the catalyst can effectively contact with both oxidant H2O2 in extraction phase and DBT in oil phase. Moreover, PMo12@CTF is robust and its catalytic activity is basically maintained after ten cycles.
AB - The immobilized polyoxometalates (POMs) with evenly dispersed catalytic sites, amphiphilic surface, and excellent recyclability are highly desired in many important reactions. Herein, PMo12@CTF has been successfully fabricated by the electrostatic assembly of H3PMo12O40 (PMo12) with porous cationic covalent triazine framework (CTF), where PMo12 are evenly dispersed on the support. The synthesized PMo12@CTF is highly active for oxidative desulfurization of diesel fuel and dibenzothiophene (DBT) can be completely converted in 2 h under mild conditions (40 °C) in a biphasic system. Impressively, the catalytic activity of heterogeneous PMo12@CTF (conversion: 100 %) is much higher than that of homogeneous PMo12 (conversion: 20 %). The control experiments and contact angle measurements reveal that the CTF endows PMo12@CTF with large surface area and amphiphilic feature and the catalyst can effectively contact with both oxidant H2O2 in extraction phase and DBT in oil phase. Moreover, PMo12@CTF is robust and its catalytic activity is basically maintained after ten cycles.
KW - Amphiphilic catalysts
KW - Covalent triazine frameworks
KW - Heterogeneous catalysis
KW - Oxidative desulfurization
KW - Polyoxometalates
UR - https://www.scopus.com/pages/publications/85128361113
U2 - 10.1002/cctc.202200021
DO - 10.1002/cctc.202200021
M3 - Article
AN - SCOPUS:85128361113
SN - 1867-3880
VL - 14
JO - ChemCatChem
JF - ChemCatChem
IS - 11
M1 - e202200021
ER -