Nanoporous block copolymer membranes immobilized with gold nanoparticles for continuous flow catalysis

Zhou, Jiemei; Zhang, Chenxu; Wang, Yong

doi:10.1039/c8py01789a

“…1.3 %o fl eaching were detected in cylindrical micelle and BCP film systems.T he above results illustrated that the micellar brushes not only effectively raised the catalytic activity of the immobilized nanocatalysts,b ut also provided as uperior loading stability during long-term flow reactions. Other reactions like chemical and photodegradation of methyl orange [27,28] were also successfully explored with the in situ generation of Au NPs and direct decoration of TiO 2 NPs on the micellar brushes (Figures S15 and S16).…”

Section: Methodsmentioning

confidence: 99%

Capillary‐Bound Dense Micelle Brush Supports for Continuous Flow Catalysis

Lin

¹

,

Cai

²

,

Cui

³

et al. 2021

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Flow reactors are appealing alternatives to conventional batch reactors for heterogeneous catalysis. However, it remains a key challenge to firmly immobilize the catalysts in a facile and flexible manner and to simultaneously maintain a high catalytic efficiency and throughput. Herein, we introduce a dense cylindrical micelle brush support in glass capillary flow reactors through a living crystallization‐driven self‐assembly process initiated by pre‐immobilized short micelle seeds. The active hairy corona of these micellar brushes allows the flexible decoration of a diverse array of nanocatalysts, either through a direct capture process or an in situ growth method. The resulting flow reactors reveal excellent catalytic efficiency for a broad range of frequently utilized transformations, including organic reductions, Suzuki couplings, photolytic degradations, and multistep cascade reactions, and the system was both recyclable and durable. Significantly, this approach is readily applicable to long capillaries, which enables the construction of flow reactors with remarkably higher throughput.

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“…The above results illustrated that the micellar brushes not only effectively raised the catalytic activity of the immobilized nanocatalysts, but also provided a superior loading stability during long‐term flow reactions. Other reactions like chemical and photodegradation of methyl orange [27, 28] were also successfully explored with the in situ generation of Au NPs and direct decoration of TiO 2 NPs on the micellar brushes (Figures S15 and S16).…”

Section: Figurementioning

confidence: 99%

Capillary‐Bound Dense Micelle Brush Supports for Continuous Flow Catalysis

Lin

¹

,

Cai

²

,

Cui

³

et al. 2021

View full text Add to dashboard Cite

Flow reactors are appealing alternatives to conventional batch reactors for heterogeneous catalysis. However, it remains a key challenge to firmly immobilize the catalysts in a facile and flexible manner and to simultaneously maintain a high catalytic efficiency and throughput. Herein, we introduce a dense cylindrical micelle brush support in glass capillary flow reactors through a living crystallization‐driven self‐assembly process initiated by pre‐immobilized short micelle seeds. The active hairy corona of these micellar brushes allows the flexible decoration of a diverse array of nanocatalysts, either through a direct capture process or an in situ growth method. The resulting flow reactors reveal excellent catalytic efficiency for a broad range of frequently utilized transformations, including organic reductions, Suzuki couplings, photolytic degradations, and multistep cascade reactions, and the system was both recyclable and durable. Significantly, this approach is readily applicable to long capillaries, which enables the construction of flow reactors with remarkably higher throughput.

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“…Zhou et al [50] fabricated nanoporous membranes supporting the block copolymers of poly(2-dimethylaminoethyl methacrylate) (PDMAEM) and polystyrene (PS) (PDMAEM-b-PS) with immobilized gold nanoparticles (AuNPs) on the surface of macroporous poly(vinylidene fluoride) (PVDF) membranes (Figure 8).…”

Section: Flow-through Catalytic Reactors Designed By Modification Of mentioning

confidence: 99%

Flow-Through Catalytic Reactors Based on Metal Nanoparticles Immobilized within Porous Polymeric Gels and Surfaces/Hollows of Polymeric Membranes

Kudaibergenov

¹

,

Джардималиева

²

2020

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State-of-the-art of flow-through catalytic reactors based on metal nanoparticles immobilized within the pores of nano-, micro- and macrosized polymeric gels and in the surface or hollow of polymeric membranes is discussed in this mini-review. The unique advantages of continuous flow-through nanocatalysis over the traditional batch-type analog are high activity, selectivity, productivity, recyclability, continuous operation, and purity of reaction products etc. The methods of fabrication of polymeric carriers and immobilization technique for metal nanoparticles on the surface of porous or hollow structures are considered. Several catalytic model reactions comprising of hydrolysis, decomposition, hydrogenation, oxidation, Suzuki coupling and enzymatic reactions in the flow system are exemplified. Realization of “on-off” switching mechanism for regulation of the rate of catalytic process through controlling the mass transfers of reactants in liquid media with the help of stimuli-responsive polymers is demonstrated. Comparative analysis of the efficiency of different flow-through catalytic reactors for various reactions is also surveyed.

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Nanoporous block copolymer membranes immobilized with gold nanoparticles for continuous flow catalysis

Abstract: Nanoporous polymers with functionalizable surfaces are desired in the preparation of reactors for continuous flow catalysis.

Cited by 37 publications

References 35 publications

Capillary‐Bound Dense Micelle Brush Supports for Continuous Flow Catalysis

Capillary‐Bound Dense Micelle Brush Supports for Continuous Flow Catalysis

Capillary‐Bound Dense Micelle Brush Supports for Continuous Flow Catalysis

Flow-Through Catalytic Reactors Based on Metal Nanoparticles Immobilized within Porous Polymeric Gels and Surfaces/Hollows of Polymeric Membranes

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