نتایج جستجو برای: shape mesoporous ncsm

تعداد نتایج: 200293  

2011
Luciana M Hollanda Gisele CG Cury Rafaella FC Pereira Gracielle A Ferreira Andreza Sousa Edesia MB Sousa Marcelo Lancellotti

BACKGROUND This study aimed the use of mesoporous silica under the naturally transformable Neisseria meningitidis, an important pathogen implicated in the genetic horizontal transfer of DNA causing a escape of the principal vaccination measures worldwide by the capsular switching process. This study verified the effects of mesoporous silica under N. meningitidis transformation specifically unde...

Journal: :Chemical communications 2014
Changlei Chen Sha Li Shaodan Xu Hui Lou Liping Xiao Jie Fan

A thermal and hydrothermal stable mesoporous ceramic acid (mCA) was synthesized by uniform coating of a WZrO(x) layer onto the internal surface of extra-large mesoporous silica (EP-FDU-12). Its ordered mesoporous structure and strong Brönsted acid sites display excellent thermal (1000 °C, air, 5 h) and hydrothermal (water steam, 300 °C, 24 h) stability.

2017
Qing Qu Jian-Hua Zhang Jing Wang Qing-Yu Li Chang-Wei Xu Xihong Lu

Considerable efforts have been devoted recently to design and fabrication of high performance and low cost electrocatalysts for oxygen evolution reaction (OER). However, catalytic activity of current electrocatalysts is usually restricted by high onset potential and limited active sites. Herein, we fabricated three-dimensional (3D) highly ordered mesoporous Pd-Co3O4 composite materials as excel...

Journal: :Journal of Analytical and Applied Pyrolysis 2022

The catalytic fast pyrolysis (CFP) of biomass represents an efficient integrated process to produce deoxygenated stable liquid fuels and valuable chemical products from lignocellulosic biomass. zeolite ZSM-5 is a widely studied catalyst for the CFP process. However, its microporous structure may limit diffusion high molecular weight intermediates active sites. Mesoporous aluminosilicates such a...

2011
Jarian Vernimmen Vera Meynen Pegie Cool

In the last decade, research concerning nanoporous siliceous materials has been focused on mesoporous materials with intrinsic zeolitic features. These materials are thought to be superior, because they are able to combine (i) the enhanced diffusion and accessibility for larger molecules and viscous fluids typical of mesoporous materials with (ii) the remarkable stability, catalytic activity an...

2018
Xiaoyu Li Kang Peng Yewei Dou Jiasheng Chen Yue Zhang Gai An

Wormhole-like mesoporous tin oxide was synthesized via a facile evaporation-induced self-assembly (EISA) method, and the gas-sensing properties were evaluated for different target gases. The effect of calcination temperature on gas-sensing properties of mesoporous tin oxide was investigated. The results demonstrate that the mesoporous tin oxide sensor calcined at 400 °C exhibits remarkable sele...

Journal: :Chemical communications 2015
Tsuneomi Kawasaki Yuko Araki Kunihiko Hatase Kenta Suzuki Arimasa Matsumoto Toshiyuki Yokoi Yoshihiro Kubota Takashi Tatsumi Kenso Soai

Mesoporous silica has been used as a heterogeneous support for catalysts; however, asymmetric induction by the helicity of inorganic mesoporous silica itself has not yet been achieved. P- and M-helical mesoporous silica was found to act as a chiral inorganic trigger for asymmetric autocatalysis to afford (S) and (R)-pyrimidyl alkanol with >99.5% ee, respectively.

Journal: :Chemical communications 2011
Yu-Shen Lin Nardine Abadeer Christy L Haynes

In this work, sub-50 nm pegylated mesoporous silica nanoparticles prepared with hydrothermal treatment are shown to have long-term stability in various media at both room and physiological temperature. Compared to bare mesoporous silica nanoparticles, the highly pegylated mesoporous silica nanoparticles show significantly improved biocompatibility and decreased macrophage uptake, making these n...

2017
Bo Jiang Cuiling Li Ömer Dag Hideki Abe Toshiaki Takei Tsubasa Imai Md. Shahriar A. Hossain Md. Tofazzal Islam Kathleen Wood Joel Henzie Yusuke Yamauchi

Mesoporous noble metals are an emerging class of cutting-edge nanostructured catalysts due to their abundant exposed active sites and highly accessible surfaces. Although various noble metal (e.g. Pt, Pd and Au) structures have been synthesized by hard- and soft-templating methods, mesoporous rhodium (Rh) nanoparticles have never been generated via chemical reduction, in part due to the relativ...

2014
Mohd Faisal Adel A Ismail Farid A Harraz Houcine Bouzid Saleh A Al-Sayari Ali Al-Hajry

We successfully developed a single-step detection and removal unit for Bi(III) ions based on dithizone (DZ) anchored on mesoporous TiO2 with rapid colorometric response and high selectivity for the first time. [(DZ)3-Bi] complex is easily separated and collected by mesoporous TiO2 as adsorbent and preconcentrator without any color change of the produced complex onto the surface of mesoporous Ti...

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