Regulation of the nanostructures self-assembled from an amphiphilic azobenzene homopolymer: influence of initial concentration and solvent solubility parameter

Sun, Hui; Leng, Ying; Zhou, Xiaoyan; Li, Xiao

doi:10.1039/d2sm01059c

Cited by 9 publications

(12 citation statements)

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“…For instance, nanospheres, sheets, nanobowls, and fiber-like carbon materials with well-controlled ordered mesopores were obtained. 36–41 Polymer self-assembly is a powerful tool to fabricate functional nanomaterials, 42–44 and provides an opportunity to prepare carbon materials with diverse morphologies, structures, and chemical compositions via a template-free strategy. 31,45–48 For instance, Feng and coworkers prepared N-doped 3D carbon flowers from the polymeric precursor self-assembled from polyimide nanosheets, which showed excellent catalytic properties toward the ORR.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-doped carbon sponge derived from the self-assembly of poly(amic acid) for high performance oxygen reduction reaction

Sun

Jin

et al. 2023

New J. Chem.

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Section: Introductionmentioning

confidence: 99%

Nitrogen-doped carbon sponge derived from the self-assembly of poly(amic acid) for high performance oxygen reduction reaction

Sun

Jin

et al. 2023

New J. Chem.

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“…[ 33 ], which involves strenuous post-processing procedures [ 34 , 35 ]. Recently, the self-assembly of amphiphilic polymers was regarded as an emerging technology to prepare carbon nanomaterials with desired morphology and porosity, including nanospheres, sheets, nanobowls, fibers, and three-dimensional structures [ 36 , 37 , 38 , 39 ], demonstrating the versatility of polymer self-assembly to prepare functional nanomaterials [ 40 , 41 , 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Cobalt Nanoparticles Encapsulated Nitrogen-Doped Carbon Sponge for Efficient Oxygen Reduction Reaction

Leng

Jin²,

Wang³

et al. 2023

Polymers

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The facile preparation of non-noble metal nanoparticle loaded carbon nanomaterials is promising for efficient oxygen reduction reaction (ORR) electrocatalysis. Herein, a facile preparation strategy is proposed to prepare nitrogen-doped carbon sponge loaded with fine cobalt nanoparticles by the direct pyrolysis of the cobalt ions adsorbed polymeric precursor. The polymeric sponge precursor with continuous framework and high porosity is formed by the self-assembly of a poly(amic acid). Taking advantage of the negatively charged surface and porous structure, cobalt ions can be efficiently adsorbed into the polymeric sponge. After pyrolysis, fine cobalt nanoparticles covered by carbon layers are formed, while the sponge-like structure of the precursor is also well-preserved in order to give cobalt nanoparticles loaded nitrogen-doped carbon sponges (Co/CoO@NCS) with a high loading content of 44%. The Co/CoO@NCS exhibits promising catalytic activity toward ORR with a half-wave potential of 0.830 V and a limiting current density of 4.71 mA cm−2. Overall, we propose a facile polymer self-assembly strategy to encapsulate transition metal nanoparticles with high loading content on a nitrogen-doped carbon sponge for efficient ORR catalysis.

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“…A large amount of functional nanomaterials, including carbon-based nanomaterials, chitosan [ 16 ], metal–organic frameworks (MOFs) [ 17 , 18 , 19 , 20 ], micelles [ 21 , 22 ], vesicles [ 23 ], magnetic nanoparticles [ 24 , 25 , 26 , 27 ], silica nanoparticles [ 28 , 29 ] and so forth, have been well developed to capture Pb(II) and other heavy metal ions from water. Recently, polymer self-assembly has been rapidly developed as a powerful tool to prepare functional nanomaterials [ 4 , 30 , 31 , 32 ]. For instance, our group presented a multifunctional homopolymer vesicle self-assembled from a scalable homopolymer, poly(amic acid) (PAA), to effectively remove four kinds of heavy metal ion (Ni 2+ , Cu 2+ , Zn 2+ , Pb 2+ ) from wastewater [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Pb(Ⅱ) by Highly Porous Polymeric Sponges Self-Assembled from a Poly(Amic Acid)

et al. 2023

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Lead (II) (Pb(II)) is widespread in water and very harmful to creatures, and the efficient removal of it is still challenging. Therefore, we prepared a novel sponge-like polymer-based absorbent (poly(amic acid), PAA sponge) with a highly porous structure using a straightforward polymer self-assembly strategy for the efficient removal of Pb(II). In this study, the effects of the pH, dosage, adsorption time and concentration of Pb(II) on the adsorption behavior of the PAA sponge are investigated, revealing a rapid adsorption process with a removal efficiency up to 89.0% in 2 min. Based on the adsorption thermodynamics, the adsorption capacity increases with the concentration of Pb(II), reaching a maximum adsorption capacity of 609.7 mg g−1 according to the Langmuir simulation fitting. Furthermore, the PAA sponge can be efficiently recycled and the removal efficiency of Pb(II) is still as high as 93% after five adsorption–desorption cycles. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses reveal that the efficient adsorption of Pb(II) by the PAA sponge is mainly due to the strong interaction between nitrogen-containing functional groups and Pb(II), and the coordination of oxygen atoms is also involved. Overall, we propose a polymer self-assembly strategy to easily prepare a PAA sponge for the efficient removal of Pb(II) from water.

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Regulation of the nanostructures self-assembled from an amphiphilic azobenzene homopolymer: influence of initial concentration and solvent solubility parameter

Abstract: The control over the morphology and nanostructure of soft nanomaterials self-assembled from amphiphilic polymers is of high interest, but is still challenging. Herein, we manipulate the morphology of bowl-shaped nanoparticles...

Cited by 9 publications

References 50 publications

Nitrogen-doped carbon sponge derived from the self-assembly of poly(amic acid) for high performance oxygen reduction reaction

Nitrogen-doped carbon sponge derived from the self-assembly of poly(amic acid) for high performance oxygen reduction reaction

Facile Preparation of Cobalt Nanoparticles Encapsulated Nitrogen-Doped Carbon Sponge for Efficient Oxygen Reduction Reaction

Efficient Removal of Pb(Ⅱ) by Highly Porous Polymeric Sponges Self-Assembled from a Poly(Amic Acid)

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