Open Access Nano Express

Indoor formaldehyde removal over CMK-3

Hyung Bum An1, Mi Jin Yu1, Ji Man Kim2, Mingshi Jin2, Jong-Ki Jeon3, Sung Hoon Park4, Seung-Soo Kim5 and Young-Kwon Park16*

Author affiliations

1 Graduate School of Energy and Environmental System Engineering, University of Seoul, Seoul 130-743, South Korea

2 Department of Chemistry, BK21 School of Chemical Materials Science and Department of Energy Science, Sungkyunkwan University, Suwon 440-746, South Korea

3 Department of Chemical Engineering, Kongju National University, Cheonan 331-717, South Korea

4 Department of Environmental Engineering, Sunchon National University, Suncheon 540-742, South Korea

5 Department of Chemical Engineering, Kangwon National University, Samcheok 245-711, South Korea

6 School of Environmental Engineering, University of Seoul, Seoul 130-743, South Korea

For all author emails, please log on.

Citation and License

Nanoscale Research Letters 2012, 7:7  doi:10.1186/1556-276X-7-7

Published: 5 January 2012

Abstract

The removal of formaldehyde at low concentrations is important in indoor air pollution research. In this study, mesoporous carbon with a large specific surface area was used for the adsorption of low-concentration indoor formaldehyde. A mesoporous carbon material, CMK-3, was synthesized using the nano-replication method. SBA-15 was used as a mesoporous template. The surface of CMK-3 was activated using a 2N H2SO4 solution and NH3 gas to prepare CMK-3-H2SO4 and CMK-3-NH3, respectively. The activated samples were characterized by N2 adsorption-desorption, X-ray diffraction, and X-ray photoelectron spectroscopy. The formaldehyde adsorption performance of the mesoporous carbons was in the order of CMK-3-NH3 > CMK-3-H2SO4 > CMK-3. The difference in the adsorption performance was explained by oxygen and nitrogen functional groups formed during the activation process and by the specific surface area and pore structure of mesoporous carbon.

Keywords:
low-concentration formaldehyde; mesoporous carbon; sulfuric acid; ammonia; activation; adsorption