Zeolite FSM 16 was synthesized by reconstruction of layered silicate in the presence of organic surfactant. With partial replacement of Ti 3+ with organic cations, TiO 2 nano structured particles were simultaneously b...Zeolite FSM 16 was synthesized by reconstruction of layered silicate in the presence of organic surfactant. With partial replacement of Ti 3+ with organic cations, TiO 2 nano structured particles were simultaneously built in the channel of the zeolite as the framework of the zeolite was formed. XRD, IR and Raman spectroscopic characterizations indicate that SiO 4 tetrahedron may be distorted and transferred from Q 3 to Q 2 form due to the pucker and reconstruction of the layered structure. The formation of TiO 2 nano structured particles had no influence on the formation of zeolite framework, however, the interaction obviously occurred between TiO 2 nano structured particles and zeolite framework.展开更多
The novel mesoporous zeolite SBA-15 is successfully used as the support to immobilize late-transition metal nickel diimine catalyst, both in physical and chemical methods, EA, ICP, FT-IR and XRD are applied to charact...The novel mesoporous zeolite SBA-15 is successfully used as the support to immobilize late-transition metal nickel diimine catalyst, both in physical and chemical methods, EA, ICP, FT-IR and XRD are applied to characterizing these supported catalysts. The results of ethylene polymerization reveal that these supported catalysts have high catalytic activity as their homogenous counterpart does,moreover, polyethylene with a fibrous morphology is produced due to the channel effect of support, and both the molecular weight and molecular weight distributions of polymers are increased greatly.展开更多
The mesoporous nanoscale zircoina zeolite was firstly synthesized via solid state —— Structure directing method without addition of any stabilizer. The sample bears lamellar or worm pore structures, relatively high ...The mesoporous nanoscale zircoina zeolite was firstly synthesized via solid state —— Structure directing method without addition of any stabilizer. The sample bears lamellar or worm pore structures, relatively high surface area compared with that reported. The mesoporous nanosize structure can also resist higher calcination temperature. The introduction of above zirconia to the catalyst of methanol synthesis dedicates the nanosize particle size to the catalyst, which significantly changes the physical structure and elec-tronic effect of the catalyst. The catalyst shows higher catalytic activity and selectivity to methanol. The active sites for methanol synthesis are demonstrated over various cata-lysts in this paper.展开更多
文摘Zeolite FSM 16 was synthesized by reconstruction of layered silicate in the presence of organic surfactant. With partial replacement of Ti 3+ with organic cations, TiO 2 nano structured particles were simultaneously built in the channel of the zeolite as the framework of the zeolite was formed. XRD, IR and Raman spectroscopic characterizations indicate that SiO 4 tetrahedron may be distorted and transferred from Q 3 to Q 2 form due to the pucker and reconstruction of the layered structure. The formation of TiO 2 nano structured particles had no influence on the formation of zeolite framework, however, the interaction obviously occurred between TiO 2 nano structured particles and zeolite framework.
文摘The novel mesoporous zeolite SBA-15 is successfully used as the support to immobilize late-transition metal nickel diimine catalyst, both in physical and chemical methods, EA, ICP, FT-IR and XRD are applied to characterizing these supported catalysts. The results of ethylene polymerization reveal that these supported catalysts have high catalytic activity as their homogenous counterpart does,moreover, polyethylene with a fibrous morphology is produced due to the channel effect of support, and both the molecular weight and molecular weight distributions of polymers are increased greatly.
文摘The mesoporous nanoscale zircoina zeolite was firstly synthesized via solid state —— Structure directing method without addition of any stabilizer. The sample bears lamellar or worm pore structures, relatively high surface area compared with that reported. The mesoporous nanosize structure can also resist higher calcination temperature. The introduction of above zirconia to the catalyst of methanol synthesis dedicates the nanosize particle size to the catalyst, which significantly changes the physical structure and elec-tronic effect of the catalyst. The catalyst shows higher catalytic activity and selectivity to methanol. The active sites for methanol synthesis are demonstrated over various cata-lysts in this paper.
