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Open AccessArticle

Characterization of Multimodal Silicas Using TG/DTG/DTA, Q-TG, and DSC Methods

Faculty of Chemistry, Department of Chromatographic Methods, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq.3, 20-031 Lublin, Poland
Institute for Sorption and Problems of Endoecology of NAS of Ukraine, 13 Naumov Str., 03164 Kyiv, Ukraine
Author to whom correspondence should be addressed.
Colloids Interfaces 2019, 3(1), 6;
Received: 10 December 2018 / Revised: 21 December 2018 / Accepted: 22 December 2018 / Published: 28 December 2018
The formation of hierarchical, multimodal porosity materials with controlled shape and size of pores is the essential challenge in materials science. Properties of silica materials depend largely on different features: crystal structure, dispersity, surface composition, and porosity as well as the method of preparation and possible modification. In this paper, multimodal silicas obtained using different additives are presented. A-50 and A-380 aerosils and wide-porous SiO2 milled at 300 rpm were used as the additives in the sol stage at 20 °C, the sol–gel stage followed by hydrothermal modification (HTT) at 200 °C, or in the mechanochemical treatment (MChT) process. The characterizations were made by application of N2 adsorption/desorption, SEM imaging, quasi-isothermal thermogravimetry (Q-TG), dynamic thermogravimetry/derivative thermogravimetry/differential thermal analysis (TG/DTG/DTA), and cryoporometry differential scanning calorimetry (DSC) methods. Results showed that such a one-step preparation method is convenient and makes it possible to obtain multimodal silicas of differentiated porous structures and surface chemistry. View Full-Text
Keywords: SiO2; porous structure; multimodal porosity; Q-TG; cryoporometry DSC SiO2; porous structure; multimodal porosity; Q-TG; cryoporometry DSC
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Charmas, B.; Kucio, K.; Sydorchuk, V.; Khalameida, S.; Zięzio, M.; Nowicka, A. Characterization of Multimodal Silicas Using TG/DTG/DTA, Q-TG, and DSC Methods. Colloids Interfaces 2019, 3, 6.

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