Tetraethyl orthosilicate

SYNTHESIS OF TS 1 ZEOLITE ⅰ . 29 Si and 1H High Resolution NMR Investigation on the Hydrolysis of Tetraethyl Orthosilicate

TS-1分子筛的合成Ⅰ.~（29）Si和~1HNMR研究正硅酸乙酯的水解

The composite silica microsphere was obtained through the polymerization of urea and formaldehyde occurred in the silica sol that prepared from the hydrolyzation of tetraethyl orthosilicate .

以甲醛与尿素作为单体在正硅酸乙酯水解所得的氧化硅溶胶中进行聚合反应制得了有机&无机二氧化硅复合微球。

Preparation of Silica Films from Tetraethyl Orthosilicate Sol-Gel Process Catalyzed with Acid

酸催化正硅酸乙脂溶胶-凝胶二氧化硅薄膜的制备

The new systems are compared with the traditional vulcanizing system of Tetraethyl orthosilicate / Dibutyltin dilaurate .

并和传统的正硅酸乙酯/二月桂酸二丁基锡（T&12）硫化体系进行了比较。

Tetraethyl Orthosilicate were chosen as precursors for SiO2 sol .

采用金属醇盐正硅酸乙脂为先驱体配制Si02溶胶。

Different thickness of SiO2-encapsulating layer was fabricated by the hydrolysis of tetraethyl orthosilicate in isopropanol solution .

再通过正硅酸乙酯在异丙醇溶液中水解包覆了不同厚度的Si02层。

The influence of H_2O , catalyst , solvent and composition of Cu-containing tetraethyl orthosilicate on the sol-gel process was discussed .

研究了水量、催化剂浓度、溶剂量及含铜硅酸乙酯的组成对溶胶-凝胶过程的影响。

On such basis , a new porous structured heteropoly acid catalyst is obtained by salt-gel reaction , using tetraethyl orthosilicate as the silicon source .

在此基础上，以正硅酸乙酯为硅源，利用盐&凝胶法得到一种新型介孔结构的杂多酸催化剂。

The cholesterol esterase and its oxidase were respectively immobilized onto sol-gel ( tetraethyl orthosilicate ) and then an enzymatic reaction column was prepared .

采用溶胶凝胶技术分别固定了胆固醇脂酶和胆固醇氧化酶，制成固定化酶柱；

Polyimide and polyimide / SiO2 hybrid membranes were prepared via sol-gel process while Tetraethyl orthosilicate ( TEOS ) was added as inorganic precursor .

以正硅酸乙酯为无机前驱体，采用溶胶-凝胶法制备了聚酰亚胺／SiO2无机杂化膜。

In this study , mesoporous CDs / silica composites were prepared through co-hydrolysis of organosilane-functionalized carbon dots and tetraethyl orthosilicate .

本论文采用简单的共水解方法，利用硅烷化碳点和正硅酸乙酯为前驱物，制备了碳点／二氧化硅介孔复合材料。

Nano-silica was prepared by the sol-gel method with the hydrolysis and condensation of tetraethyl orthosilicate ( TEOS ), and incorporated ammonia chloride ( NH_4Cl ) as cationic surfactant .

采用溶胶-凝胶技术，利用正硅酸乙酯的水解和缩合反应，用NH4Cl作为阳离子表面活性剂，在短时间内制备了纳米SiO2粉末。

Activity of the catalyst was significantly improved after being treated with tetraethyl orthosilicate ( TEOS ), which made it more lipophilic , with benzene yield of up to 25.6 % at 600 ℃ .

催化剂进一步用正硅酸乙酯处理后，其表面变得更亲油，脱氢活性明显改善，600℃时，环已烷脱氢产物苯的收率可达25.6%。

The main work is as follows : Mesoporous SiO2 was synthesized in acidic condition using CTAB as template and tetraethyl orthosilicate ( TEOS ) as inorganic precursor , which characterized by scanning electron microscopy and infrared spectrometry .

本论文主要工作如下：1、以CTAB为模板分子，正硅酸乙酯（TEOS）为硅源，在酸性条件下合成出介孔SiO2，利用扫描电镜和红外光谱进行了表征。

Cu-rich Cu / SiO_2 nanocomposite aerogels , in which mass fraction of Cu could reach as high as 66 % , were firstly prepared by sol-gel process of Cu-containing tetraethyl orthosilicate ( CuTEOS ) .

采用含铜硅酸乙酯（CuTEOS）进行溶胶-凝胶反应来制备高Cu含量的Cu/SiO2纳米复合气凝胶，复合气凝胶中的Cu含量可在小于66%（质量分数）的范围内调节。

Single-walled carbon nanotubes ( SWNTs ) were continuously synthesized by floating pyrolysis method in the temperature range of 850-1160 ℃ by using tetraethyl orthosilicate ( TEOS ) as raw material , ferrocene as the precursor of Fe particles .

以正硅酸乙酯（TEOS）为前驱体，二茂铁为催化剂前驱体，利用气相流动催化热解法在850～1160℃连续合成了单壁碳纳米管（SWNTS）。

Nanometer silica ( average particle size 60 ~ 100 nm ) has been prepared by hydrolysis and condensation of tetraethyl orthosilicate , and then incorporated with proper amount of surfactant , cetyltrimethyl ammonium bromide ( CTAB ) .

通过原硅酸四乙酯的水解和缩合，并加入适量的表面活性剂十六烷基三甲基溴化铵（CTAB），制得了纳米二氧化硅（平均粒径60～100nm）。

The SiO2 / TiO2 composite nanoparticle materials were prepared by the hydrolysis of tetrabutyl titanate and tetraethyl orthosilicate . On this basis dispersing such nanoparticles into the aliphatic polyurethane to prepare a novel polyurethane-SiO2 / TiO2 composite coatings .

本文采用溶胶-凝胶法，用钛酸四丁酯与正硅酸乙酯制备了纳米级SiO2／TiO2复合微粒，将其分散在聚醚型水性聚氨酯中，制备了新型水性聚氨酯-SiO2／TiO2复合涂料。

Three-dimensional ordered macroporous ( 3DOM ) SiW_ ( 12 ) / SiO_2 hybrid materials were synthesized by using Keggin-type heteropolyacid SiW_ ( 12 ) and tetraethyl orthosilicate ( TEOS ) as raw materials and polystyrene colloidal crystal assembled by sedimentation as template .

用自然沉降法组装成规则排列的聚苯乙烯胶晶，并以此作为模板剂，用Keggin结构的杂多酸SiW12和正硅酸乙酯组成溶胶作为先驱物，成功制备了三维有序大孔（3DOM）SiW12/SiO2杂化材料。

Low density silica is prepared by Sol - Gel polymerization of tetraethyl - orthosilicate ( TEOS ) .

用正硅酸乙酯为原料，采用Sol－Gel法进行了制备低密度二氧化硅材料的研究。