Recyclable Ag/halloysite nanotubes/polyvinyl alcohol sponges for enhanced reduction of 4-nitrophenol

Cheng, Hongjing; Yang, Zhaohua; Du, Feipeng; Liu, Hui; Zhang, Qiao; Zhang, Yunfei

doi:10.1016/j.clay.2022.106510

Cited by 16 publications

(3 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, when using m-chloroperbenzoic acid (mCPBA), styrene oxide 2 was not the main product of the reaction. GC-MS and NMR data showed the formation of 2hydroxy-2-phenylethyl 3-chlorobenzoate (6) as the main product after 20 hours which transformed to styryl chlorobenzoate (7) during the GC-MS analysis (see Figure S3-5 of ESI). (Scheme 3) The maximum yield of styrene oxide was 45.8 % when using a catalyst with a silver content of 0.2 mmol/g of the catalyst (Table 2), while a comparable amount of ester 6 was formed.…”

Section: Choosing An Oxidizermentioning

confidence: 99%

“…[5,6] Nanosilver composite catalysts exhibit good recyclability, chemical and thermal stability and considered as environmentally friendly materials. [5,7] Alkene epoxidation reactions provide a significant part of the important intermediates, target chemicals and drugs. The process involves hydroperoxide or much less often, some organic hydroperoxides.…”

Section: Introductionmentioning

confidence: 99%

“…Composite catalytic systems based on silver nanoparticles are of current interest because of higher efficiency and simplicity of preparation [5,6] . Nanosilver composite catalysts exhibit good recyclability, chemical and thermal stability and considered as environmentally friendly materials [5,7] …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fly‐Ash Cenosphere as Non‐Porous Ag‐Nanoparticle Support for Epoxidation of Styrene

Tarasova,

Khanov,

Vorobiev

et al. 2024

ChemistrySelect

View full text Add to dashboard Cite

The global strategy to reduce waste production implies development of recycling technologies and conversion of various waste into value‐added products. Fly ash is an industrial waste produced in a large amount. It comprised an aluminosilicate cenosphere, which seems perspective as a support for heterogeneous catalysts. Here we report the preparation and application of heterogeneous silver nanocatalysts deposited on cenosphere in the epoxidation reaction, a relevant process for preparation of valuable organic precursors and target chemicals. Reductive wet deposition method yields Ag nano‐dispersed coating of improved quality represented by Ag particles of about 2.7 nm on the surface of the microspheres size of 50–250 microns for catalytic synthesis of styrene‐oxide. The 0.1 mmol/g Ag/cenosphere provided best catalytic results with threefold excess of tret‐butyl hydroperoxide in acetonitrile at 80 °C. Comparison of fly ash cenosphere with other supports suggests that low porosity of microspherical support allows for an easier access of reagents to active sites of the catalyst and significantly increases the yield of epoxide and selectivity of the reaction.

show abstract

Section: Choosing An Oxidizermentioning

confidence: 99%