Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after Carbonization
Microalgae is a promising next-generational energy. In this research, we focus on oil-extracted Botryococcus braunii residues collected by adding polysilicato-iron (PSI) as a flocculant followed by carbonization under argon atmosphere. We conducted carbonization at various temperatures as a first at...
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MDPI AG
2018-02-01
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| Online Access: | http://www.mdpi.com/2311-5629/4/1/10 |
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| author | Aohan Wang Mikihide Demura Makoto M. Watanabe Kotaro Ohara Takanari Kashiwagi Kazuo Kadowaki Eiji Kita Jiuchao Dong Hiromasa Goto |
| author_facet | Aohan Wang Mikihide Demura Makoto M. Watanabe Kotaro Ohara Takanari Kashiwagi Kazuo Kadowaki Eiji Kita Jiuchao Dong Hiromasa Goto |
| author_sort | Aohan Wang |
| collection | DOAJ |
| description | Microalgae is a promising next-generational energy. In this research, we focus on oil-extracted Botryococcus braunii residues collected by adding polysilicato-iron (PSI) as a flocculant followed by carbonization under argon atmosphere. We conducted carbonization at various temperatures as a first attempt to reveal the fundamental properties of the carbonization process of the microbes. The carbons thus obtained by heat treatment at 900 °C present a unique magnetic behavior due to reduced magnetite (Fe3O4) inclusion, which is produced from polysilicato iron (Fe2O3) during the heating process. Experimental results suggest that this carbonic material can be applied as a heavy metal-capturing carbon and magnetic porous substrate catalyst. The effective use of the waste may open a new avenue for an energy-microbiology-materials system. |
| first_indexed | 2024-12-12T07:55:14Z |
| format | Article |
| id | doaj.art-7db1eace135f4e8c954d89a17ab84125 |
| institution | Directory Open Access Journal |
| issn | 2311-5629 |
| language | English |
| last_indexed | 2024-12-12T07:55:14Z |
| publishDate | 2018-02-01 |
| publisher | MDPI AG |
| record_format | Article |
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| spelling | doaj.art-7db1eace135f4e8c954d89a17ab841252022-12-22T00:32:20ZengMDPI AGC2311-56292018-02-01411010.3390/c4010010c4010010Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after CarbonizationAohan Wang0Mikihide Demura1Makoto M. Watanabe2Kotaro Ohara3Takanari Kashiwagi4Kazuo Kadowaki5Eiji Kita6Jiuchao Dong7Hiromasa Goto8Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, JapanAlgae Biomass and Energy System R & D Center (ABES), University of Tsukuba, Tsukuba, Ibaraki 305-8572, JapanAlgae Biomass and Energy System R & D Center (ABES), University of Tsukuba, Tsukuba, Ibaraki 305-8572, JapanDivision of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, JapanDivision of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, JapanDivision of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, JapanDivision of Applied Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, JapanDivision of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, JapanDivision of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, JapanMicroalgae is a promising next-generational energy. In this research, we focus on oil-extracted Botryococcus braunii residues collected by adding polysilicato-iron (PSI) as a flocculant followed by carbonization under argon atmosphere. We conducted carbonization at various temperatures as a first attempt to reveal the fundamental properties of the carbonization process of the microbes. The carbons thus obtained by heat treatment at 900 °C present a unique magnetic behavior due to reduced magnetite (Fe3O4) inclusion, which is produced from polysilicato iron (Fe2O3) during the heating process. Experimental results suggest that this carbonic material can be applied as a heavy metal-capturing carbon and magnetic porous substrate catalyst. The effective use of the waste may open a new avenue for an energy-microbiology-materials system.http://www.mdpi.com/2311-5629/4/1/10Botryococcus braunii residuescarbonizationmagnetismporous structuresuperconducting quantum interference device (SQUID)57Fe Mössbauerpolysilicato-ironFe3O4flocculant |
| spellingShingle | Aohan Wang Mikihide Demura Makoto M. Watanabe Kotaro Ohara Takanari Kashiwagi Kazuo Kadowaki Eiji Kita Jiuchao Dong Hiromasa Goto Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after Carbonization C Botryococcus braunii residues carbonization magnetism porous structure superconducting quantum interference device (SQUID) 57Fe Mössbauer polysilicato-iron Fe3O4 flocculant |
| title | Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after Carbonization |
| title_full | Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after Carbonization |
| title_fullStr | Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after Carbonization |
| title_full_unstemmed | Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after Carbonization |
| title_short | Surface Observation and Magnetism of Oil-Extracted Botryococcus braunii Residues before and after Carbonization |
| title_sort | surface observation and magnetism of oil extracted botryococcus braunii residues before and after carbonization |
| topic | Botryococcus braunii residues carbonization magnetism porous structure superconducting quantum interference device (SQUID) 57Fe Mössbauer polysilicato-iron Fe3O4 flocculant |
| url | http://www.mdpi.com/2311-5629/4/1/10 |
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