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Journal of Nanomaterials
Volume 2014, Article ID 580347, 8 pages
http://dx.doi.org/10.1155/2014/580347
Research Article

Pore Characteristics and Hydrothermal Stability of Mesoporous Silica: Role of Oleic Acid

1Department of Mineral Resources and Energy Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
2R&D Team, Institute of Mine Reclamation Corporation, Coal Center, 30 Chungjin-dong, Jongno-gu, Seoul 110-727, Republic of Korea

Received 27 April 2014; Accepted 23 June 2014; Published 6 July 2014

Academic Editor: Donglu Shi

Copyright © 2014 Junhyun Choi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Silicate mesoporous materials were synthesized with nonionic surfactant and their surfaces were modified by oleic acid adsorption. Infrared spectrometer, nitrogen adsorption-desorption isotherm, scanning electron microscopy, and thermogravimetric analyses were used to investigate the structure of oleic acid modified mesoporous material. The effects of heat treatment at various temperatures on oleic acid modified materials were also studied. Oleic acids on silica surfaces were found to be bonded chemically and/or physically and be capable of enduring up to . The adsorbed oleic acid improved the hydrothermal stability of mesoporous silica and assisted mesopore structure to grow more in hydrothermal treatment process by preventing the approach of water.