Mechanisms of Heterogeneous Processes in the System SiO2+ CH4: I. Methane Chemisorption on a Reactive Silica Surface

AbstractCarbon nanotubes (CNT) are interesting candidates for the reinforcement in robust composites and for conducting fillers in polymers due to their fascinating electronic and mechanical properties. For the first time, we report the incorporation of multi walled carbon nanotubes (MWNTs) into silica-glass surfaces by means of partial surface-melting caused by a continuous wave Nd:YAG laser. MWNTs were detected being well incorporated in the silica-surface. The composites are characterized using scanning electron microscopy (SEM) and Raman-spectroscopy. A model for the composite-formation is proposed based on heatabsorption by MWNTs and a partial melting of the silica-surface.

Download Full-text

Reactivity of Single Transition Metal Atoms on a Hydroxylated Amorphous Silica Surface: A Periodic Conceptual DFT Investigation.

Chemistry - A European Journal ◽

10.1002/chem.202004660 ◽

2020 ◽

Author(s):

Xavier Deraet ◽

Jan Turek ◽

Mercedes Alonso ◽

Frederik Tielens ◽

Stefaan Cottenier ◽

...

Keyword(s):

Transition Metal ◽

Amorphous Silica ◽

Silica Surface ◽

Conceptual Dft ◽

Metal Atoms ◽

Transition Metal Atoms ◽

Single Transition

Download Full-text

A recycling strategy of ion beam removal and recoating of sol-gel film on fused silica surface

Optik ◽

10.1016/j.ijleo.2021.167259 ◽

2021 ◽

pp. 167259

Author(s):

Wenfeng Sun ◽

Xia Xiang ◽

Bo Li ◽

Xiang Dong ◽

Xiaolong Jiang ◽

...

Keyword(s):

Silica Surface ◽

Ion Beam ◽

Sol Gel ◽

Fused Silica ◽

Gel Film

Download Full-text

Pyrolysis and Oxidation of PAN in Dry Air. Thermoanalytical Methods

Materials Science ◽

10.5755/j01.ms.17.1.246 ◽

1970 ◽

Vol 17 (1) ◽

pp. 38-42

Author(s):

Anna BIEDUNKIEWICZ ◽

Pawel FIGIEL ◽

Marta SABARA

Keyword(s):

Temperature Increase ◽

Heating Rates ◽

Linear Change ◽

Dry Air ◽

Isothermal Conditions ◽

Gaseous Products ◽

Heterogeneous Processes ◽

Temperature Ranges ◽

Higher Temperature ◽

Kinetics Of

The results of investigations on pyrolysis and oxidation of pure polyacrylonitrile (PAN) and its mixture with N,N-dimethylformamide (DMF) under non-isothermal conditions at linear change of samples temperature in time are presented. In each case process proceeded in different way. During pyrolysis of pure PAN the material containing mainly the product after PAN cyclization was obtained, while pyrolysis of PAN+DMF mixture gave the product after cyclization and stabilization. Under conditions of measurements, in both temperature ranges, series of gaseous products were formed.For the PAN-DMF system measurements at different samples heating rates were performed. The obtained results were in accordance with the kinetics of heterogeneous processes theory. The process rates in stages increased along with the temperature increase, and TG, DTG and HF function curves were shifted into higher temperature range. This means that the process of pyrolysis and oxidation of PAN in dry air can be carried out in a controlled way.http://dx.doi.org/10.5755/j01.ms.17.1.246

Download Full-text

HIGH PURITY REACTIVE SILICA

Chemical & Engineering News ◽

10.1021/cen-v029n053.p5503 ◽

1951 ◽

Vol 29 (53) ◽

pp. 5503

Keyword(s):

High Purity ◽

Reactive Silica

Download Full-text

Interaction of water-insoluble quaternary ammonium salts with the hydrated silica surface

Theoretical and Experimental Chemistry ◽

10.1007/bf01374127 ◽

1996 ◽

Vol 32 (6) ◽

pp. 331-334

Author(s):

V. V. Turov ◽

O. A. Zaporozhets ◽

O. Yu. Nadzhafova ◽

V. V. Sukhan

Keyword(s):

Quaternary Ammonium ◽

Silica Surface ◽

Quaternary Ammonium Salts ◽

Ammonium Salts ◽

Hydrated Silica

Download Full-text

ChemInform Abstract: Dispersion and Fixation of 12-Tungstophosphate Anion on a Silica Surface Modified with Silane Agents Having an Amine Group and Their Catalytic Properties.

ChemInform ◽

10.1002/chin.199413020 ◽

2010 ◽

Vol 25 (13) ◽

pp. no-no

Author(s):

M. KAMADA ◽

H. NISHIJIMA ◽

Y. KERA

Keyword(s):

Silica Surface ◽

Catalytic Properties ◽

Amine Group ◽

Surface Modified

Download Full-text

Nano-Welding of Multi-Walled Carbon Nanotubes on Silicon and Silica Surface by Laser Irradiation

Nanomaterials ◽

10.3390/nano6030036 ◽

2016 ◽

Vol 6 (3) ◽

pp. 36 ◽

Cited By ~ 12

Author(s):

Yanping Yuan ◽

Jimin Chen

Keyword(s):

Carbon Nanotubes ◽

Laser Irradiation ◽

Silica Surface ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

Download Full-text

The Gas-Solid-Phase 2,5-Dioxopiperazine Synthesis. Cyclization of Vaporous Dipeptides on Silica Surface

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19940461 ◽

1994 ◽

Vol 59 (2) ◽

pp. 461-466 ◽

Cited By ~ 12

Author(s):

Vladimir A. Basiuk ◽

Taras Yu. Gromovoy

Keyword(s):

Silica Surface ◽

Solid Phase ◽

Phase Method ◽

Solid Phase Method

The "gas solid-phase" method is used for the preparation of both symmetric and asymmetric 2,5-dioxopiperazines via cyclization of vaporous linear dipeptides in the presence of silica.

Download Full-text