One-Pot Pathway: Fabricating Ordered Hollow Silica Spheres Using Sodium Silicate as the Precursor

2011 ◽  
Vol 64 (12) ◽  
pp. 1541 ◽  
Author(s):  
Weiwei Wu ◽  
Xinhua Yuan ◽  
Shunsheng Cao ◽  
Yi Ge ◽  
Songjun Li ◽  
...  
Keyword(s):  
Sodium Silicate ◽  
Low Cost ◽  
Reaction System ◽  
Silica Spheres ◽  
One Pot ◽  
Hollow Silica ◽  
Hollow Silica Spheres ◽  
Silica Source ◽  
Transmission Electron ◽  
Cationic Monomer

The preparation of hollow silica spheres via the sodium silicate route presents many advantages such as a low-cost silica source, and an environmentally friendly reaction system. Unfortunately, it is extremely hard to prepare the well-defined hollow silica spheres by using sodium silicate as the silica source owing to its rapid, disordered precipitation under the acid catalysis. As a result, we, in this paper, report a facile, economic, one-pot pathway for preparation of the ordered hollow silica spheres by employing a sodium silicate precursor. In this approach, the cationic polystyrene (CPS) templates can be first prepared via emulsifier-free emulsion polymerization by using the cationic monomer vinylbenzyltrimethylammonium chloride, then, the silica shells were attached on the surfaces of CPS particles via electrostatic interaction, finally CPS particles were in situ dissolved and removed by adding toluene to create ordered hollow silica spheres. Some modern techniques and instruments, including the transmission electron microscope, scanning electron microscopy, infrared spectroscopy, thermogravimetric analysis, and Brunauer-Emmett-Teller theory were employed to monitor and characterize the resulting hollow silica spheres.

One-Pot Preparation of Hollow Silica Spheres by Using Thermosensitive Poly(N-isopropylacrylamide) as a Reversible Template

Langmuir ◽  
2009 ◽  
Vol 25 (20) ◽  
pp. 12367-12373 ◽  
Author(s):  
Binyang Du ◽  
Zheng Cao ◽  
Zhenbing Li ◽  
Aixiong Mei ◽  
Xinghong Zhang ◽  
...  
Keyword(s):  
Silica Spheres ◽  
One Pot ◽  
Hollow Silica ◽  
Hollow Silica Spheres

One-pot synthesis of molybdenum oxide nanoparticles encapsulated in hollow silica spheres: an efficient and reusable catalyst for epoxidation of olefins

2017 ◽  
Vol 5 (35) ◽  
pp. 18518-18526 ◽  
Author(s):  
Yasutaka Kuwahara ◽  
Naoyuki Furuichi ◽  
Hiroyuki Seki ◽  
Hiromi Yamashita
Keyword(s):  
Molybdenum Oxide ◽  
Oxide Nanoparticles ◽  
Reusable Catalyst ◽  
Silica Spheres ◽  
Olefin Epoxidation ◽  
One Pot ◽  
Hollow Silica ◽  
Hollow Silica Spheres ◽  
Molybdenum Oxide Nanoparticles ◽  
Epoxidation Of Olefins

A facile one-pot method was developed to synthesize hollow silica spheres encapsulating MoOx nanoparticles, which could act as an efficient and reusable catalyst in olefin epoxidation.

Synthesis and Adsorption Characters of Silica Hollow Spheres

2012 ◽  
Vol 184-185 ◽  
pp. 1276-1279
Author(s):  
Feng Xia Qiao ◽  
Qi Gang Ding ◽  
Zhi Ping Lin
Keyword(s):  
Solid Phase ◽  
Hollow Spheres ◽  
Silica Spheres ◽  
High Adsorption ◽  
Hydrothermal Route ◽  
Hollow Silica ◽  
Adsorption Performance ◽  
Hollow Silica Spheres ◽  
Silica Source ◽  
Chicken Tissue

A kind of ordered meso-sized hollow silica spherical material was prepared by hydrothermal route using monodispersed cross-linked polymethyl polymer spheres as template, metacrylate tetraethyl orthosilicate as a silica source. The calcination was empolyed for the removing of template and generation silica hollow spherical materials with meso-sized pores. The adsorption performance of the obtained hollow silica spheres was investigated and the results indicated that the obtained hollow silica spheres had high adsorption capacity for sulfadimethoxine. They were sucessfully used as the dispersive adsorbent for matrix solid phase dispersive extraction sulfadimethoxine from chicken tissue with satisfactory results.

Sodium silicate route: fabricating high monodisperse hollow silica spheres by a facile method

2011 ◽  
Vol 19 (5) ◽  
pp. 913-919 ◽  
Author(s):  
Weiwei Wu ◽  
Shunsheng Cao ◽  
Xinhua Yuan ◽  
Zhiyuan Zhao ◽  
Long Fang
Keyword(s):  
Sodium Silicate ◽  
Silica Spheres ◽  
Hollow Silica ◽  
Hollow Silica Spheres

Zinc Oxide Nanoparticles-Immobilized Mesoporous Hollow Silica Spheres for Photodegradation of Sodium Dodecylbenzenesulfonate

2016 ◽  
Vol 69 (7) ◽  
pp. 790 ◽  
Author(s):  
Parisa Pourdayhimi ◽  
Pei Wen Koh ◽  
Mohamed Mohd Salleh ◽  
Hadi Nur ◽  
Siew Ling Lee
Keyword(s):  
Mesoporous Structure ◽  
Molar Ratio ◽  
Silica Spheres ◽  
Transmission Electron Microscopy Analysis ◽  
Sodium Dodecylbenzenesulfonate ◽  
Hollow Silica ◽  
Hollow Silica Spheres ◽  
Transmission Electron ◽  
Electron Microscopy Analysis ◽  
Adsorption Desorption

ZnO-Immobilized mesoporous hollow silica spheres (ZnO/xMHSS; x = 15, 30, 50 molar ratio of Zn/Si) were synthesized and examined as photocatalysts toward the degradation of sodium dodecylbenzenesulfonate (SDBS). The hollow structures of MHSS and ZnO-immobilized MHSS composite were evidenced by transmission electron microscopy analysis. X-ray diffraction results confirmed the presence of ZnO and a mesoporous structure in the synthesized materials. N2 adsorption–desorption analysis also depicted the formation of a mesoporous structure and the increased surface area for the ZnO/xMHSS materials. Fourier transform infrared spectroscopy analysis revealed the formation of Si–O–Zn bonds due to interaction between ZnO and MHSS. The photocatalytic testing results indicated that all the ZnO/xMHSS materials showed improved efficiencies of 10–21 % toward the photodegradation of SDBS when compared with bare ZnO. Among the prepared materials, ZnO/15MHSS was the best photocatalyst, which photodegraded 68 % SDBS after 1 h reaction. The kinetic study demonstrated that the photocatalytic reaction followed the second-order model.

Preparation and Characterization of Hollow Silica Nanospheres

2011 ◽  
Vol 393-395 ◽  
pp. 240-243 ◽  
Author(s):  
Li Li Feng ◽  
Wei Zhao ◽  
Jing Jing Tong ◽  
Guan Hua Yue
Keyword(s):  
Electron Microscopy ◽  
Nitrogen Adsorption ◽  
Silica Shell ◽  
Silica Spheres ◽  
Silica Nanospheres ◽  
Hollow Silica ◽  
Hollow Silica Spheres ◽  
Transmission Electron ◽  
Hollow Silica Nanospheres

Monodisperse hollow silica nanospheres were prepared using functionalized polystyrene (PS) as a template and characterized by transmission electron microscopy (TEM), nitrogen adsorption and thermo gravimetry (TG) techniques. The effect of ammonia amount on hollow silica spheres was explored. It is found that the ammonia amount is important to the fabrication of hollow silica nanospheres. The roughness and thickness of the silica shell increased with the increase of ammonia amount. When ammonia amount reached 20 ml, the product hadn’t been hollow structural. The TGA curves and the BET results of the samples supplied a proof for the formation mechanism of the hollow silica spheres.

Effect of hollow silica spheres on water vapor permeability of polyacrylate film

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 11485-11493 ◽  
Author(s):  
Yan Bao ◽  
Chunhua Shi ◽  
Yongqiang Yang ◽  
Jianzhong Ma ◽  
Risong Sha
Keyword(s):  
Electron Microscopy ◽  
Shell Thickness ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Silica Spheres ◽  
X Ray Diffraction ◽  
Hollow Silica ◽  
X Ray ◽  
Hollow Silica Spheres ◽  
Transmission Electron

Hollow silica spheres with different hollow size and shell thickness were synthesized via a template method using PS spheres as templates and characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction and Brunauer–Emmett–Teller analysis.

A Simple and Low-Cost Method for the Preparation of Monodisperse Hollow Silica Spheres

2008 ◽  
Vol 112 (31) ◽  
pp. 11623-11629 ◽  
Author(s):  
Hua Zou ◽  
Shishan Wu ◽  
Qianping Ran ◽  
Jian Shen
Keyword(s):  
Low Cost ◽  
Silica Spheres ◽  
Hollow Silica ◽  
Hollow Silica Spheres

scholarly journals Solvothermal Synthesis of Mn3O4Nanoparticle/Graphene Sheet Composites and Their Supercapacitive Properties

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Y. F. Liu ◽  
G. H. Yuan ◽  
Z. H. Jiang ◽  
Z. P. Yao
Keyword(s):  
Electron Microscopy ◽  
Graphene Sheet ◽  
Low Cost ◽  
High Specific Capacitance ◽  
Ethanol Solution ◽  
Diffraction Field ◽  
Electrochemical Performances ◽  
One Pot ◽  
Long Term Stability ◽  
Transmission Electron

Mn3O4nanoparticle/graphene sheet (GM) composites were synthesized via a one-pot and low-cost solvothermal process in an ethanol solution. The as-prepared materials were characterized by X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. Results showed that the nanosized Mn3O4particles had tetragonal hausmannite structure and were successfully loaded on the graphene sheets. Moreover, the electrochemical performances of GM composites produced by different mass percents of Mn2+/graphite oxide (GO) were evaluated by means of cyclic voltammetry and galvanostatic charge-discharge studies. The composite prepared with Mn2+/GO mass percent of 10 : 90 showed a high specific capacitance of 245 F/g at 5 mV/s in the 6 M KOH solution and better long-term stability along with 81% of its initial capacitance after 1200 cycles at 0.5 A/g.

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