A Shear Stress Regulated Assembly Route to Silica Nanotubes and Their Closely Packed Hollow Mesostructures

Wang, Chun; Wei, Jing; Qin, Yuwen; Luo, Wei; Li, Yuhui; Wang, Minghong; Deng, Yonghui; Zhao, Dongyuan

doi:10.1002/anie.201305527

Cited by 30 publications

(25 citation statements)

References 32 publications

(40 reference statements)

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“…[8][9][10][11][12] Among them, silica nanotubes have gained particular interest in both fundamental science and industrial applications because of their anisotropic structure, high aspect ratio, ultra-large specic surface area and hollow nanoscale morphology, which make them very useful in various elds, such as drug delivery, 13 organic molecular separation, 14 decomposition of pollutants, 15 etc. Compared with traditional fabrication routes, 16 the template-directing method is a conceptually simple, straightforward and versatile route to fabricate nanotubes, [17][18][19][20][21][22][23] and their nal nanostructures mainly depend on anisotropic templates. Therefore, preparation of templates is a crucial step for successful fabrication of predesigned silica nanostructured materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of silica nanotubes with controlled dimensions

2014

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Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of silica nanotubes with controlled dimensions

2014

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“…Soft templating method has become a common method to synthesize porous carbon materials. [ 27–31 ] For example, due to the water insolubility of polyethylene oxide, it usually dissolved in organic solvent (such as THF), and the solvent evaporation‐induced self‐assembly (EISA) method has developed to synthesize carbon materials with porous structure. Based on this, solvent evaporation‐induced aggregate assembly (EIAA) method has also been developed by Zhao's group recently.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Porous Structure of Mono‐dispersed Hierarchically Nitrogen‐doped Carbon Spheres for Highly Efficient Oxygen Reduction Reaction

Shu

Gan

Hou

et al. 2020

Energy & Environ Materials

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The search for a low‐cost metal‐free cathode material with excellent mass transfer structure and catalytic activity in oxygen reduction reaction (ORR) is one of the most challenging issues in fuel cells. In this work, nitrogen‐rich m‐phenylenediamine is introduced into the synthesis of porous carbon spheres to tune the pore structure and nitrogen‐doped active sites. As a result, more pyridinic N and pyrrolic N functional species were observed at the interior and surface of the carbon spheres. The introduction of m‐phenylenediamine also regulated the nucleating of precursors, an urchin‐like mesoporous surface structure ensures point contact and less agglomeration between each particle was obtained. With optimized proportion of micropores/mesopores and improved nitrogen‐contained functional species, the ORR activity can be remarkably improved. The half‐wave potential of this catalyst could achieve to 0.81 V (versus RHE) which is only 42 mV lower than commercial Pt/C catalyst. Furthermore, the optimized cathode catalyst achieved a 69 mW cm−2 maximum power density when operated in direct methanol fuel cells at room temperature.

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“…[38][39][40][41][42][43][44][45][46][47] A series of silica materials with different morphologies, including two/three-dimensional ordered mesoporous silica monoliths, 48,49 dual-mesoporous silica monoliths, 50 63 pathways, the formation mechanism of MCNs is less understood. [38][39][40][41][42][43][44][45][46][47] A series of silica materials with different morphologies, including two/three-dimensional ordered mesoporous silica monoliths, 48,49 dual-mesoporous silica monoliths, 50 63 pathways, the formation mechanism of MCNs is less understood.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of mesoporous carbon nanoparticles with large and tunable pore sizes

Liu

et al. 2015

Nanoscale

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Mesoporous carbon nanoparticles (MCNs) with large and adjustable pores have been synthesized by using poly(ethylene oxide)-b-polystyrene (PEO-b-PS) as a template and resorcinol-formaldehyde (RF) as a carbon precursor. The resulting MCNs possess small diameters (100-126 nm) and high BET surface areas (up to 646 m(2) g(-1)). By using home-designed block copolymers, the pore size of MCNs can be tuned in the range of 13-32 nm. Importantly, the pore size of 32 nm is the largest among the MCNs prepared by the soft-templating route. The formation mechanism and structure evolution of MCNs were studied by TEM and DLS measurements, based on which a soft-templating/sphere packing mechanism was proposed. Because of the large pores and small particle sizes, the resulting MCNs were excellent nano-carriers to deliver biomolecules into cancer cells. MCNs were further demonstrated with negligible toxicity. It is anticipated that this carbon material with large pores and small particle sizes may have excellent potential in drug/gene delivery.

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A Shear Stress Regulated Assembly Route to Silica Nanotubes and Their Closely Packed Hollow Mesostructures

Cited by 30 publications

References 32 publications

Fabrication and characterization of silica nanotubes with controlled dimensions

Fabrication and characterization of silica nanotubes with controlled dimensions

Tailoring the Porous Structure of Mono‐dispersed Hierarchically Nitrogen‐doped Carbon Spheres for Highly Efficient Oxygen Reduction Reaction

Synthesis of mesoporous carbon nanoparticles with large and tunable pore sizes

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