PSA-functionalized sol-gel sorbent materials and methods of preparation
AssigneeThe Florida International University Board of Trustees
InventorsAbuzar Kabir, Kenneth G. Furton
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Abstract
The invention provides a sorbent material comprising a PSA that is synthesized via a sol-gel process. The sorbent material enables higher loading of PSA and other functional groups than conventional sorbents. The sorbent material can further encapsulate carbonaceous and/or non-carbonaceous particles that are distributed throughout the sorbent network. The invention also relates to a method of making the sorbent materials.
Claims20
A sorbent material comprising a Primary Secondary Amine (PSA)-functionalized metal oxide network produced from hydrolysis and condensation of precursors, said precursors comprising one or more primary metal oxide precursor and one or more PSA-functionalized metal oxide precursor, said one or more primary metal oxide precursor having the following general formula (I):
- M being silicon, titanium, aluminum, zirconium, tantalum, germanium, barium, gallium, indium, thallium, vanadium, cobalt, nickel, chromium, copper, iron, zinc, boron, lanthanum, or niobium;
- and
- at least two of R1, R2, R3, and R4 being independently alkoxy, carboxyl, or hydroxy;
- the remaining R1, R2, R3, and R4 independently being absent, H or comprising alkyl moieties, arylene moieties, cyanoalkyl moieties, fluoroalkyl moieties, phenyl moieties, cyanophenyl moieties, biphenyl moieties, cyanobiphenyl moieties, dicyanobiphenyl, cyclodextrin moieties, crown ether moieties, cryptand moieties, calixarene moieties, or any derivative thereof;
- said PSA-functionalized metal oxide precursor having said general formula (I), with the proviso that at least one of R1, R2, R3, and R4 comprises a PSA functional group;
- said sorbent material further comprising carbonaceous and/or non-carbonaceous particles being encapsulated within said network;
- said hydrolysis and condensation are carried out in the absence of an independent base catalyst;
- and
- said one or more PSA functional group and said carbonaceous and/or non-carbonaceous particles being homogeneously distributed within said network.
A sorbent material comprising a Primary Secondary Amine (PSA)-functionalized metal oxide network produced from hydrolysis and condensation of precursors, said precursors comprising one or more primary metal oxide precursor and one or more PSA-functionalized metal oxide precursor, said one or more primary metal oxide precursor being alkyl trialkoxysilane and/or tetraalkoxysilane, said PSA-functionalized metal oxide precursor being a substituted alkyl trialkoxysilane and/or trihydroxysilane with said substitution comprising a PSA functional group,
- said sorbent material further comprising carbonaceous and/or non-carbonaceous particles being encapsulated within said network;
- said hydrolysis and condensation are carried out in the absence of an independent base catalyst;
- and
- said PSA functional group and said carbonaceous and/or non-carbonaceous particles being homogeneously distributed within said network.
Dependencies are inferred from the claim text.