نتایج جستجو برای: mesoporosity
تعداد نتایج: 294 فیلتر نتایج به سال:
We demonstrate the engineered growth of TiO(2) nanotube arrays on flexible carbon fibre sheets. The modification not only enables the textile to absorb ultraviolet light efficiently but also imparts large surface area and mesoporosity to the textile. This flexible nanoarchitecture greatly facilitates the purification of organic wastewater.
We report the photocatalytic activity of iron-grafted mesoporous Pt/TiO2 catalysts, combining properties heterojunction photocatalysts with mesoporosity, for gas-phase production hydrogen from water-ethanol mixtures. GC–MS analysis reveals a preferential ethanol dehydrogenation reaction pathway, resulting in formation acetaldehyde high selectivity versus carbon dioxide, all catalysts investigat...
A simple amphiphilic surfactant containing a mono-quaternary ammonium head group (N-methylpiperidine) is effective in imparting substantial mesoporosity during synthesis of SSZ-13 and ZSM-5 zeolites. Highly mesoporous SSZ-13 prepared in this manner shows greatly improved catalytic performance in the methanol-to-olefins reaction compared to bulk SSZ-13.
The dual template synthesis of zeolite SSZ-13 by use of trimethyl-adamantanammonium hydroxide and a diquaternary-ammonium mesoporogen induces considerable mesoporosity without impeding zeolite microporosity. The strongly improved accessibility of Brønsted sites in mesoporous SSZ-13 increases its stability during application as an acid catalyst in the methanol-to-olefins reaction.
Metal-containing mesoporous starches have been synthesized using a simple and efficient microwave-assisted methodology followed by metal impregnation in the porous gel network. Final materials exhibited surface areas >60 m² g-1, being essentially mesoporous with pore sizes in the 10-15 nm range with some developed inter-particular mesoporosity. These materials characterized by several technique...
In a previous work by the authors (A. Fernández-Pérez el al., Room temperature sintering of polar ZnO nanosheets: I-evidence, 2017, DOI: 10.1039/C7CP02306E), polar ZnO nanosheets were stored at room temperature under different atmospheres and the evolution of their textural and crystal properties during storage was followed. It was found that the specific surface area of the nanosheets drastica...
Paper, a low-cost and flexible substrate made from cellulose fiber, is explored in this study as a platform for fast electrochemical energy storage devices. Conductivity and Li-storage capabilities are introduced to the paper by functionalization with carbon nanotubes (CNTs) and V2O5, respectively. The Li-storage paper cathodes present a remarkably high rate performance due to the high conducti...
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