نتایج جستجو برای: mesoporosity

تعداد نتایج: 294  

Journal: :Chemical communications 2010
Peng Chen Li Gu Xiudong Xue Mingjuan Li Xuebo Cao

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.

Journal: :Chemical Engineering Journal 2022

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...

Journal: :Chemical communications 2014
Xiaochun Zhu Roderigh Rohling Georgy Filonenko Brahim Mezari Jan P Hofmann Shunsuke Asahina Emiel J M Hensen

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.

Journal: :Chemical communications 2012
Leilei Wu Volkan Degirmenci Pieter C M M Magusin Bartłomiej M Szyja Emiel J M Hensen

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.

2013
Manuel Ojeda Vitaliy Budarin Peter S. Shuttleworth James H. Clark Antonio Pineda Alina M. Balu Antonio A. Romero Rafael Luque

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...

Journal: :Physical chemistry chemical physics : PCCP 2017
Amparo Fernández-Pérez Verónica Rodríguez-Casado Teresa Valdés-Solís Gregorio Marbán

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...

2013
Xinyi Chen Hongli Zhu Chanyuan Liu Yu-Chen Chen Nicholas Weadock Gary Rubloff Liangbing Hu

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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