Effect of Thermal Treatment on the Texture and Structure of Sol-Gel Derived Carbon Nanotube/Silica Composites

The present work studies the structural and textural evolution of sol-gel derived carbon nanotube(CNT)/silica composites during the process of thermal treatment. The composites were prepared by sol-gel technique, and their structural and textural changes were traced by scanning electron microscopy, Raman spectra, infrared spectra, and thermogravimetric analysis. The results show that doped CNTs have an impact on the structural and textural evolution of CNT/silica composites during the process of thermal treatment and the CNT/silica composites exhibit good thermal stability during the heat treatment process. However, the composites are not densified even after treatment at 1000°C, quite different from the thermal behaviors of pure silica xerogel, due to the existing of guest CNTs.

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Effects of thermal treatment and layers’ number on SnO2 thin films properties prepared by sol-gel technique

Materials Research Express ◽

10.1088/2053-1591/ab1d96 ◽

2019 ◽

Vol 6 (8) ◽

pp. 086422 ◽

Cited By ~ 4

Author(s):

D Haouanoh ◽

R Zaïr TalaIghil ◽

M Toubane ◽

F Bensouici ◽

K Mokeddem

Keyword(s):

Thin Films ◽

Thermal Treatment ◽

Sol Gel ◽

Gel Technique ◽

Sno2 Thin Films

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Defect Induced by Heated Treatment in Silica Fiber Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.304.160 ◽

2011 ◽

Vol 304 ◽

pp. 160-164

Author(s):

Zhong Yin Xiao ◽

Wen Yun Luo ◽

Jian Xiang Wen ◽

Jian Zhong Yin ◽

Ting Yun Wang

Keyword(s):

Thermal Treatment ◽

Treatment Process ◽

Defect Formation ◽

Fiber Material ◽

Nonbridging Oxygen ◽

Pure Silica ◽

Conversion Frequency ◽

Oxygen Hole ◽

Strained Bonds ◽

Hole Centers

In this paper, defect induced by heated treatment in silica is studied. The formation process of defect is analyzed by the thermodynamic model. The results show that defect can be produced by thermal treatment process. The concentration of defect can be affected by many factors. The defect formation induced by heated treatment is related to the initial precursors. To pure silica glass, the precursors mainly come from the strained bonds of network. It can produce centers and nonbridging oxygen hole centers (NBOHCs). These defects are also related to the temperature of heated treatment and the conversion frequency between precursors and defects. The changes of defect concentration with temperature and conversion frequency are also discussed in detail.

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Synthesis of sheathed carbon nanotube tips by the sol–gel technique

Applied Surface Science ◽

10.1016/s0169-4332(03)00891-2 ◽

2004 ◽

Vol 221 (1-4) ◽

pp. 4-9 ◽

Cited By ~ 16

Author(s):

A Brioude ◽

P Vincent ◽

C Journet ◽

J.C Plenet ◽

S.T Purcell

Keyword(s):

Carbon Nanotube ◽

Sol Gel ◽

Gel Technique

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Concentration-dependent properties of amorphous carbon nanotube/silica composites via the sol–gel technique

CrystEngComm ◽

10.1039/c4ce01083c ◽

2014 ◽

Vol 16 (36) ◽

pp. 8570-8575 ◽

Cited By ~ 12

Author(s):

Yusliza Yusof ◽

Mohd Rafie Johan

Keyword(s):

Carbon Nanotube ◽

Amorphous Carbon ◽

Amorphous Silica ◽

Sol Gel ◽

Gel Technique

Amorphous silica coated on the α-CNT surfaces.

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Highly Photoactive Monodidisperse Titania Hollow Nanospheres

Journal of Advanced Oxidation Technologies ◽

10.1515/jaots-2008-0228 ◽

2008 ◽

Vol 11 (2) ◽

Author(s):

Athina Kyrkou ◽

Athanassios I. Kontos ◽

Georgios Papavassiliou ◽

Polycarpos Falaras

Keyword(s):

Thermal Treatment ◽

Sol Gel ◽

Core Shell ◽

Titanium Alkoxide ◽

Hollow Nanospheres ◽

Modified Polymer ◽

Gel Technique

Titania nanospheres were prepared using the sol-gel technique following a core-shell approach based on polystyrene substrates. Thermal treatment of the titanium alkoxide modified polymer core structures resulted to formation of monodisperse TiO

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Carbon nanotube silica glass composites in thin films by the sol–gel technique

Optical Materials ◽

10.1016/j.optmat.2005.03.002 ◽

2006 ◽

Vol 28 (3) ◽

pp. 167-171 ◽

Cited By ~ 30

Author(s):

L. Berguiga ◽

J. Bellessa ◽

F. Vocanson ◽

E. Bernstein ◽

J.C. Plenet

Keyword(s):

Thin Films ◽

Carbon Nanotube ◽

Silica Glass ◽

Sol Gel ◽

Glass Composites ◽

Gel Technique

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Ionic-liquid-mediated poly(dimethylsiloxane)- grafted carbon nanotube fiber prepared by the sol-gel technique for the head space solid-phase microextraction of methyl tert -butyl ether using GC

Journal of Separation Science ◽

10.1002/jssc.201300796 ◽

2013 ◽

Vol 37 (1-2) ◽

pp. 127-134 ◽

Cited By ~ 14

Author(s):

Hossein Vatani ◽

Ali Sarafraz Yazdi

Keyword(s):

Ionic Liquid ◽

Carbon Nanotube ◽

Solid Phase Microextraction ◽

Solid Phase ◽

Sol Gel ◽

Methyl Tert Butyl Ether ◽

Butyl Ether ◽

Tert Butyl ◽

Carbon Nanotube Fiber ◽

Gel Technique

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Synthesis and textural evolution of mesoporous Si3N4 aerogel with high specific surface area and excellent thermal insulation property via the urea assisted sol-gel technique

Chemical Engineering Journal ◽

10.1016/j.cej.2019.122880 ◽

2020 ◽

Vol 382 ◽

pp. 122880 ◽

Cited By ~ 4

Author(s):

Jie Ding ◽

Xiaodong Wu ◽

Xiaodong Shen ◽

Sheng Cui ◽

Ya Zhong ◽

...

Keyword(s):

Specific Surface ◽

Surface Area ◽

Thermal Insulation ◽

Specific Surface Area ◽

Sol Gel ◽

High Specific Surface Area ◽

Insulation Property ◽

Textural Evolution ◽

Gel Technique ◽

Thermal Insulation Property

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Carbon nanotube-coated solid-phase microextraction metal fiber based on sol–gel technique

Journal of Chromatography A ◽

10.1016/j.chroma.2009.03.076 ◽

2009 ◽

Vol 1216 (22) ◽

pp. 4641-4647 ◽

Cited By ~ 98

Author(s):

Ruifen Jiang ◽

Fang Zhu ◽

Tiangang Luan ◽

Yexiang Tong ◽

Hong Liu ◽

...

Keyword(s):

Carbon Nanotube ◽

Solid Phase Microextraction ◽

Solid Phase ◽

Sol Gel ◽

Metal Fiber ◽

Gel Technique

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Preparation of Maghemite-Silica Nanocomposites Using Sol-Gel Technique

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.2140 ◽

2010 ◽

Vol 97-101 ◽

pp. 2140-2143 ◽

Cited By ~ 3

Author(s):

Bee Chin Ang ◽

Iskandar Idris Yaacob

Keyword(s):

Crystallite Size ◽

Sol Gel ◽

Weight Ratio ◽

Spherical Shape ◽

Average Crystallite Size ◽

Silica Matrix ◽

Silica Xerogel ◽

Maghemite Nanoparticles ◽

Silica Nanocomposites ◽

Gel Technique

Superparamagnetic maghemite nanoparticles were successfully produced using Massart’s procedure. Nanocomposites consisting of the synthesized maghemite nanoparticles and silica were produced by dispersing the as-synthesized maghemite nanoparticles into the silica xerogel, which was prepared by sol-gel technique. The system was then heated for 3 days at 140oC. A variety of weight ratios of Fe2O3/SiO2 was investigated. The nanocomposites were characterized using TGA, XRD, TEM and AGM. TGA thermogram showed one significant weight loss at around 250oC. It was caused by dehydration and evaporation of solvent from sol-gel process. XRD showed that the dispersed particles were still maghemite. TEM micrographs showed that the maghemite nanoparticles were in spherical shape and they were homogeneously incorporated in the silica matrix. The values of magnetization at 10kOe applied field were in the range of 1.79emu/g to 9.53emu/g depending of the Fe2O3/SiO2 ratio. Reduction of average crystallite size of dispersed maghemite particles was observed after encapsulation process. Increasing weight ratio of Fe2O3/SiO2 caused increase of the average crystallite size of maghemite nanoparticles.

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