Functional Hollow Carbon Nanospheres by Latex Templating

White, Robin J.; Tauer, Klaus; Antonietti, Markus; Titirici, Maria‐Magdalena

doi:10.1021/ja107697s

Cited by 254 publications

(160 citation statements)

References 51 publications

(30 reference statements)

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“…The TEM image of the used HCNS depicted an apparently unaltered hollow nanosphere (Fig. 6) with the exception of some dark spots formed on the surface due to the in situ deposition of Pt nanoparticles as a cocatalyst and hydrogen-evolution site 9 . The FTIR spectrum after the reaction remained unchanged (Supplementary Fig.…”

Section: Discussionmentioning

confidence: 99%

“…These materials would allow for the direct generation of the reactive electrons and holes on the shell with sufficient energy for redox chemistry without relying on chromophoric molecules that need to be grafted onto the surface via complicated chemical designs and syntheses. A range of inorganic hollow structures have been synthesized via templated methods employing polymer latex 8,9 , silica 10,11 , acoustic bubbles 12 and emulsion/microemulsion 13 as the templates, and some of these spherical and hollow semiconductor structures have been used for the photocatalytic splitting of water [14][15][16] . Nevertheless, the templated synthesis of robust conjugated polymer hollow nanospheres with a shell thickness of < 100 nm is rarely covered.…”

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confidence: 99%

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Bioinspired hollow semiconductor nanospheres as photosynthetic nanoparticles

et al. 2012

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natural photosynthesis occurs in the thylakoid membrane where functional proteins and electron carriers are precisely arranged to efficiently convert sunlight into a chemical potential between the two membrane sides, via charge separation and electron transport chains, for use in oxygen generation and Co 2 fixation. These light-harvesting complexes and cofactors have been actively mimicked using dyes, semiconductors and catalytic nanoparticles. However, the photosynthetic scaffold that optimizes both the capture and distribution of light and separates both the oxidative and reductive species has been mimicked much less often, especially using polymer substances. Here we report the synthesis of hollow nanospheres sized in the optical range and made of a robust semiconductor, melon or carbon-nitride polymer. These hollow nanospheres are shown to function as both light-harvesting antennae and nanostructured scaffolds that improve photoredox catalysis, which was determined to have a 7.5% apparent quantum yield via a hydrogen-generation assay.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Bioinspired hollow semiconductor nanospheres as photosynthetic nanoparticles

et al. 2012

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“…Sulfonated hydrothermal carbons, either prepared in two steps [18] or in one-pot synthetic method 3 [19], have been also used as acid catalysts for esterification reactions. Furthermore, hydrothermal carbon synthesis is a very versatile method to prepare materials with different porous structures [20][21][22][23][24] and shapes, such as hollow capsules [25][26][27], nanowires [28] or nanotubes [29]. Recently, it has been demonstrated by our group that HT carbon films can be also coated on a structured macroscopic support such as graphite felt [30].…”

Section: Introductionmentioning

confidence: 99%

Deactivation of sulfonated hydrothermal carbons in the presence of alcohols: Evidences for sulfonic esters formation

Fraile

García‐Bordejé

Roldán

2012

Journal of Catalysis

100

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Sulfonated hydrothermal carbons show high activity for esterification of palmitic acid with alcohols. However, the catalyst is significantly deactivated upon recovery. Leaching of sulfonated species does not account for this deactivation, which is observed even by pretreatment only with the alcohol under reflux. Solid state NMR shows the presence of chemically bound alkyl groups coming from the alcohol, clearly different from strongly physisorbed species obtained by pretreatment at room temperature. The formation of sulfonate esters accounts for the deactivation behavior in reactions taking place in alcohols as solvents, mainly with methanol due to its higher reactivity.

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“…The varying hard templates used is seen with the synthesis of hollow polyaniline, a conductive polymer, nanoparticles which have used gold [217], silica [218], and polystyrene [219] as cores. Other hollow polymeric nanoparticles are typically widely used in the biomedical field, and include polypyrrole/chitosan [220][221][222], chitosan/dextran [223], and carbohydrate-derived, carbonaceous nanoparticles [224].…”

Section: Polymeric Nanoparticlesmentioning

confidence: 99%

Template-based syntheses for shape controlled nanostructures

Pérez-Page

et al. 2016

Advances in Colloid and Interface Science

129

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A variety of nanostructured materials are produced through template-based synthesis methods, including zerodimensional, one-dimensional, and two-dimensional structures. These span different forms such as nanoparticles, nanowires, nanotubes, nanoflakes, and nanosheets. Many physical characteristics of these materials such as the shape and size can be finely controlled through template selection and as a result, their properties as well. Reviewed here are several examples of these nanomaterials, with emphasis specifically on the templates and synthesis routes used to produce the final nanostructures. In the first section, the templates have been discussed while in the second section, their corresponding synthesis methods have been briefly reviewed, and lastly in the third section, applications of the materials themselves are highlighted. Some examples of the templates frequently encountered are organic structure directing agents, surfactants, polymers, carbon frameworks, colloidal sol-gels, inorganic frameworks, and nanoporous membranes. Synthesis methods that adopt these templates include emulsion-based routes and template-filling approaches, such as self-assembly, electrodeposition, electroless deposition, vapor deposition, and other methods including layer-by-layer and lithography. Templatebased synthesized nanomaterials are frequently encountered in select fields such as solar energy, thermoelectric materials, catalysis, biomedical applications, and magnetowetting of surfaces.

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Functional Hollow Carbon Nanospheres by Latex Templating

Cited by 254 publications

References 51 publications

Bioinspired hollow semiconductor nanospheres as photosynthetic nanoparticles

Bioinspired hollow semiconductor nanospheres as photosynthetic nanoparticles

Deactivation of sulfonated hydrothermal carbons in the presence of alcohols: Evidences for sulfonic esters formation

Template-based syntheses for shape controlled nanostructures

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