Abstract Nanocasting is a powerful method for creating materials that are more difficult to synthesize by conventional processes. We summarize recent developments in the synthesis of various structured porous solids, covering silica, carbon, and other nonsiliceous solids created nanocasting pathway. Structure replication on nanometer length scale allows materials' properties be manipulated controlled manner, such as tunable composition, controllable structure morphology, specific...

A polymer gel derived from resorcinol and formaldehyde can be prepared in around 5 min using lysine as polymerization catalyst nitrogen source. After pyrolysis of this gel, a new type nitrogen-containing carbon monolith was obtained (see figure), which exhibits the highest CO2-adsorption capacity to date up 3.13 mmol g−1 at room temperature.

Porous carbon monoliths with defined multilength scale pore structures, a nitrogen-containing framework, and high mechanical strength were synthesized through self-assembly of poly(benzoxazine-co-resol) carbonization process. Importantly, this synthesis can be easily scaled up to prepare identical structures. By controlling the reaction conditions, porous exhibit fully interconnected macroporosity mesoporosity cubic Im3m symmetry withstand press pressure 15.6 MPa. The use amines in results...

Magnetic, highly porous ordered carbon of the CMK-3 and CMK-5 type with pure or carbon–nitrogen framework were nanoengineered by a sequence bulk manipulation steps. The materials can be used as efficient magnetic adsorbents (see picture) catalysts, but applications going far beyond these envisaged.

In heterogeneous catalysis, supports play a crucial role in modulating the geometric and electronic structure of active metal phase for optimizing catalytic performance. A γ-Al2O3 nanosheet that contains 27% pentacoordinate Al(3+) sites can nicely disperse stabilize raft-like Pt-Sn clusters as result strong interactions between support. Consequently, there are Pt Sn atoms, resulting an increase electron density sites. When used propane dehydrogenation reaction, this catalyst displayed...

Dopamine is an excellent and flexible agent for surface coating of inorganic nanoparticles contains unusually high concentrations amine groups. In this study, we demonstrate that through a controlled thin layer polydopamine on the α-Fe(2)O(3) in dopamine aqueous solution, followed by subsequent carbonization, N-doped carbon-encapsulated magnetite has been synthesized shows electrochemical performance as anode material lithium-ion batteries. Due to strong binding affinity iron oxide...

Abstract Novel multifunctional composites composed of highly dispersed nanosized Fe 2 O 3 particles, a tubular mesoporous carbon host, and conductive polypyrrole (PPy) sealing layer are hierarchically assembled via two facile processes, including bottom‐up introduction nanoparticles in carbons, followed by situ surface with the PPy coating. particles well‐dispersed within matrix is spatially selectively coated onto external pore entrances @C composite, thereby bridging composite together...

Abstract Hard carbon attracts considerable attention as an anode material for sodium‐ion batteries; however, their poor rate capability and low realistic capacity have motivated intense research effort toward exploiting nanostructured carbons in order to boost comprehensive performance. Ultramicropores are considered essential attaining high‐rate well initial Coulombic efficiency by allowing the rapid diffusion of Na + inhibiting contact electrolyte with inner surfaces. Herein, hard...

The durability of electrode materials is a limiting parameter for many electrochemical energy conversion systems. In particular, electrocatalysts the essential oxygen reduction reaction (ORR) present some most challenging instability issues shortening their practical lifetime. Here, we report mesostructured graphitic carbon support, Hollow Graphitic Spheres (HGS) with specific surface area exceeding 1000 m(2) g(-1) and precisely controlled pore structure, that was specifically developed to...

Uniform and highly dispersed γ-Fe2O3 nanoparticles with a diameter of ∼6 nm supported on CMK-5 carbons C/SBA-15 composites were prepared via simple impregnation thermal treatment. The nanostructures these materials characterized by XRD, Mössbauer spectroscopy, XPS, SEM, TEM, nitrogen sorption. Due to the confinement effect mesoporous ordered matrices, fully immobilized within channels supports. Even at high Fe-loadings (up about 12 wt %) carbon no iron species detected external surface...

We report engineered hollow core–shell interlinked carbon spheres that consist of a mesoporous shell, void, and an anchored core are expected to be ideal sulfur hosts for overcoming the shortage Li–S batteries. The were obtained through solution synthesis polymer followed by pyrolysis process occurred in hermetical silica shell. During pyrolysis, sphere was transformed into carbonaceous volatiles self-deposited on shell due blocking effect gravitational force natural driving lowering surface...

On the basis of benzoxazine chemistry, we have established a new way to synthesize highly uniform carbon nanospheres with precisely tailored sizes and high monodispersity. Using monomers including resorcinol, formaldehyde, 1,6-diaminohexane, in presence Pluronic F127 surfactant, polymer are first synthesized under programmed reaction temperatures. Subsequently, they pseudomorphically uniformly converted yield, due excellent thermal stability such polybenzoxazine-based polymers. The...

We report an efficient, highly selective, and low temperature graphene-catalyzed reaction process for one-step oxidation of benzene to phenol with hydrogen peroxide as the oxidant. The chemically converted graphene (CCG) from small graphite was used catalyst. conversion reaches 18%, being sole product. catalyst reusable very stable. By XPS, C K-edge X-ray absorption spectra, benzene-TPD, kinetic measurements, it concluded that moderate H2O2 activation rate, good adsorption ability, balanced...

Hierarchically porous carbons with variable pore sizes at multi-length-scale, a nitrogen and boron co-doped local graphitized framework, high mechanical strength were synthesized through the self-assembly of poly(benzoxazine-co-resol) ionic liquid C16mimBF4 carbonization process. In this synthesis, acts both as structure directing agent heteroatom precursor. The obtained have specific surface area lower than 376 m2 g−1 thus skeleton density. With such doped structures fully interconnected...

Abstract Oxidative dehydrogenation of propane to olefins is a promising alternative route industrialized direct dehydrogenation, but encounters the difficulty in selectivity control for because overoxidation reactions that produce substantial amount undesired CO 2 . Here we report edge‐hydroxylated boron nitride, metal‐free catalyst, efficiently catalyzed propylene with superior (80.2 %) only negligible formation (0.5 at given conversion 20.6 %. Remarkable stability was evidenced by...

Under evolutionary pressure from chemotherapy, cancer cells develop resistance characteristics such as a low redox state, which eventually leads to treatment failures. An attractive option for combatting is producing high concentration of produced free radicals in situ. Here, we report the production and use dispersible hollow carbon nanospheres (HCSs) novel platform delivering drug doxorubicine (DOX) generating additional cellular reactive oxygen species using near-infrared laser...

Analogous to the synthesis of CMK-3, ordered mesoporous carbons (OMC) containing nitrogen groups were synthesized using silica SBA-15 as a template, polyacrylonitrile (PAN) carbon source, and 2,2'-azobisisobutyronitrile an initiator. Before carbonization, PAN/SBA-15 composites treated in air at low temperature stabilize PAN increase yield. After carbonization removal PAN-based OMC can be obtained. Samples characterized by XRD, TEM, adsorption, elemental analysis. The results show that pore...

Abstract Dieser Aufsatz beschreibt die Synthese, Stabilisierung, Funktionalisierung und Anwendung magnetischer Nanopartikel sowie magnetischen Eigenschaften nanostrukturierter Systeme. Fortschritte hinsichtlich der Größen‐ Formkontrolle wurden durch Methoden wie Mitfällung, thermische Zersetzung und/oder Reduktion, micellare Synthesestrategien Hydrothermalsynthese erzielt. Entscheidend ist immer noch Schutz gegen Korrosion, weshalb ein Schwerpunkt auf geeignete Schutzstrategien gelegt wird –...

Mesoporous magnesium oxide has been prepared through a hard-templating pathway using mesoporous carbon aerogel as template and nitrate solution MgO precursor. The used can be synthesized by drying resorcinol/formaldehyde polymer under ambient pressure conditions instead of the usually employed supercritical method. After removal simple combustion at 600 °C for 8 h in air, obtained primary particles have close to spherical shapes, which are connected form three-dimensional network structure....

Ordered mesoporous carbon , named as NCC‐1, has been synthesized via a nanocasting process using SBA‐15 the template and diluted furfuryl alcohol solution source. NCC‐1 shows bimodal pore size distribution (see Figure) in mesopore range high volume up to 3.2 cm 3 g –1 . Since systems are independently generated at different stages during synthesis, they can also be modified independently.