title: Chromate adsorption mechanism on nanodiamond-derived onion-like carbon.
abstract: The onion-like carbon (OLC) was prepared as adsorbent and tested for the removal of chromate ions from aqueous solutions. The OLC was thermally derived from nanodiamond by vacuum annealing at 1000-2000°C. An investigation was conducted the chromate adsorption mechanism of OLC, by analysing the temperature-dependent evolution of the various oxygen-carbon bonds and the chemisorbed water by X-ray photo electron spectroscopy, as well as by the first principle calculation of the bond energies for relevant bond configurations. The present work demonstrated the importance of the carbon-oxygen bond type and carbon dangling bonds for chromate adsorption, as well as for other anionic heavy metals adsorbed from wastewater and sewage.
authors: Center for Electronic Materials, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea, Republic of Korea.
authors: Young-Jin
authors: YJ
authors: Ko
authors: Computational Science Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea, Republic of Korea.
authors: Keunsu
authors: K
authors: Choi
authors: Department of Earth and Environmental Sciences, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea, Republic of Korea.
authors: Soonjae
authors: S
authors: Lee
authors: Center for Electronic Materials, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea, Republic of Korea; Department of Materials Science and Engineering, Yonsei University, 262 Seongsanno, Seodaemun-Gu, Seoul 120-749, Republic of Korea, Republic of Korea.
authors: Jung-Min
authors: JM
authors: Cho
authors: Department of Materials Science and Engineering, Yonsei University, 262 Seongsanno, Seodaemun-Gu, Seoul 120-749, Republic of Korea, Republic of Korea.
authors: Heon-Jin
authors: HJ
authors: Choi
authors: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea, Republic of Korea.
authors: Seok Won
authors: SW
authors: Hong
authors: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea, Republic of Korea; Department of Energy and Environmental Engineering, University of Science and Technology (UST), Daejeon 305-350, Republic of Korea, Republic of Korea. Electronic address: plead36@kist.re.kr.
authors: Jae-Woo
authors: JW
authors: Choi
authors: Computational Science Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea, Republic of Korea. Electronic address: mizuseki@kist.re.kr.
authors: Hiroshi
authors: H
authors: Mizuseki
authors: Center for Electronic Materials, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea, Republic of Korea. Electronic address: wsleemk@gmail.com.
authors: Wook-Seong
authors: WS
authors: Lee
keywords: Adsorption; Chromate; Dangling bond; Hydroxyl functional group; Onion-like carbon