نتایج جستجو برای: mesoporous structure

تعداد نتایج: 1576810  

2017
Ping Zhao Min-Chao Liu Hui-Chao Lin Xiang-Yu Sun Yan-Yu Li Si-Qi Yan

In the past decade, mesoporous silica nanoparticles (MSNs) have attracted increasing attention for their potential biomedical applications. With their tailored mesoporous structure and high surface area, MSNs as drug delivery systems (DDSs) show significant advantages over traditional drug nanocarriers. MSNs have the characteristics of large specific surface area and large pore volume, easy to ...

2012
B. R. Yates B. L. Darby R. G. Elliman K. S. Jones

Related Articles Thermally induced Ostwald ripening of mesoporous Ge nanostructures J. Appl. Phys. 113, 023517 (2013) From circular to triangular alumina nanopore arrays via simple replication Appl. Phys. Lett. 102, 021601 (2013) Mesoporous germanium morphology transformation for lift-off process and substrate re-use Appl. Phys. Lett. 102, 011915 (2013) A proposed 2D framework for estimation of...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2004
Hui Wang Jian-Jun Miao Jian-Min Zhu Hong-Min Ma Jun-Jie Zhu Hong-Yuan Chen

A facile and efficient approach for the fabrication of mesoporous spherical aggregates of anatase nanocrystals is reported in this paper. Cetyltrimethylammonium bromide was used as the structure-directing agent, and the interaction between cyclohexane microdroplets and the cetyltrimethylammonium bromide self-assemblies led to the assembly of 4-5-nm-sized anatase nanocrystals into spherical aggr...

Journal: :Chemical communications 2009
Shao-Wei Bian Zhuo Ma Le-Sheng Zhang Fang Niu Wei-Guo Song

Silica nanotubes with mesoporous walls of 30 nm thickness and various internal morphologies are produced using hard/soft dual templates; this hierarchical pore structure shows faster mass transportation in catalysis.

Journal: :Chemical communications 2015
Kyung Joo Lee Young Jin Sa Hu Young Jeong Christopher W Bielawski Sang Hoon Joo Hoi Ri Moon

3D mesoporous graphene (mesoG) was synthesized from [Ni2(EDTA)] (EDTA = ethylenediaminetetraacetate). The material is comprised of interconnected 4 nm-sized hollow carbon shells composed of 3-4 layers of graphene and exhibits high bifunctional electrocatalytic activity as well as high durability for use in oxygen evolution and reduction reactions.

Journal: :Chemical communications 2012
Eun-Young Jeong Cheang-Rae Lim Hailian Jin Sang-Eon Park

trans-1,2-Diaminocyclohexane functionalized mesoporous silica was applied as an ideal catalyst for asymmetric Michael addition of various nitroalkane derivatives. Short channels and plugs in the pore structure offered chiral enhancement in Michael addition.

Alireza J. Gholinezhad Leila Torkian

Mesoporous carbon (CMK-3) modified with Fe3O4 nanoparticles has been successfully synthesized and characterized by powder X-ray diffraction (XRD), N2 adsorption-desorption, scanning electron microscope (SEM) and transmission electron microscopy (TEM).The results depict that the synthesized Fe-CMK-3 preserved the ordered mesoporous structure of CMK-3, and magnetic species were dispersed insi...

In this study, Santa Barbara Amorphous (SBA-15) mesoporous silica has been functionalized with aminopropyl groups that were converted to propargyl-bearing moieties through the reaction with propargyl bromide. The material then underwent an efficient Cu(I)-catalyzed azide alkyne click reaction with sodium azide in order to obtain the corresponding triazole products. The covalent modification of ...

Journal: :Journal of nanoscience and nanotechnology 2010
Nongyue He Yan Deng Lijian Xu Zhiyang Li Xiaolong Li

Silicotungstenic acid (STA)-containing mesoporous materials were directly synthesized in a nonaqueous medium by sol-gel method. X-ray powder diffraction showed that both as-synthesized and calcined materials possess mesoporous structure. STA contents in extraction solutions were analyzed with inductively coupled plasma. When STA/silica ratio changed from 1:100 to 1:4, the immobilization of STA ...

2014
Spencer W. Robbins Hiroaki Sai Francis J. DiSalvo Sol M. Gruner Ulrich Wiesner

Mesoporous transition metal nitrides are interesting materials for energy conversion and storage applications due to their conductivity and durability. We present ordered mixed titanium-niobium (8:2, 1:1) nitrides with gyroidal network structures synthesized from triblock terpolymer structure-directed mixed oxides. The materials retain both macroscopic integrity and mesoscale ordering despite h...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید