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The effect of high power ultrasound on an aqueous suspension of graphite
Open accessAbstract
Ultrasound treatment was used to study the decrease of the granulometry of graphite, due to the cavitation, which allows the erosion by separating grains. At a smaller scale, cavitation bubble implosion tears apart graphite sheets as shown by HRTEM, while HO(*) and H(*) radicals produced from water sonolysis, generate oxidative and reductive reactions on these sheet fragments. Such reactions form smaller species, e.g. dissolved organic matter. The methodology proposed is very sensitive to unambiguously identifying the in situ composition of organic compounds in water. The use of the atmospheric pressure chemical ionization (APCI) Fourier transform mass spectrometry (FTMS) technique minimizes the perturbation of the organic composition and does not require chemical treatment for analysis. The structural features observed in the narrow range (m/z<300) were mainly aromatic compounds (phenol, benzene, toluene, xylene, benzenediazonium, etc.), C(4)-C(6) alkenes and C(2)-C(10) carboxylic acids. Synthesis of small compounds from graphite sonication has never been reported and will probably be helpful to understand the mechanisms involved in high energy radical reactions.
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Ultrasound treatment opens up clogged pores, cleans the surface, and facilitates the leaching of ash content of biochar, resulting in increased surface area and porosity.
“In addition to exfoliation of graphitic structure, ultrasound treatment opens up the clogged pores, cleans the surface, and facilitates the leaching of ash content of biochar, resulting in increased surface area and porosity (Guittonneau et al., 2010).”
From Effect of Pyrolysis Temperature on PhysicoChemical Properties and Acoustic-Based Amination of Biochar for Efficient CO2 Adsorption (2020) · cites this paper as Guittonneau et al., 2010
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References 37 · Cited by 45
Metadata
- Authors
- Guittonneau, F., Abdelouas, A., Grambow, B., & Huclier, S.
- Affiliations
- Laboratoire de Physique Subatomique et des Technologies Associées (FR)
- Corresponding author
- Guittonneau, Fabrice
- Venue
- Ultrasonics Sonochemistry
- Publisher
- Elsevier BV
- Published
- 2010-02
- Volume
- 17
- Issue
- 2
- Pages
- 391-398
- ISSN
- 1350-4177 (ISSN-L)
- OpenAlex
- W2037672428
- Cited by
- 45
- References
- 37
- Citations by year
- 2025: 2 · 2024: 4 · 2023: 3 · 2022: 4 · 2021: 4 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 5 · 2015: 3 · 2014: 6 · 2013: 2 · 2012: 2
- FWCI
- 0.81
- Type
- journal article
- Language
- en
- Open access
- green
- in2p3.hal.science
- Licence
- Locations
- Ultrasonics Sonochemistry (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion, other-oa)
- Topics
- Physical Sciences › Physics and Astronomy › Acoustics and Ultrasonics › Ultrasound and Cavitation Phenomena
- Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
- Physical Sciences › Chemical Engineering › Filtration and Separation › Minerals Flotation and Separation Techniques
- Keywords
- high-intensity ultrasound, graphite, sonolysis, cavitation, bubble implosion, dissolved organic matter, atmospheric pressure chemical ionization, Fourier transform mass spectrometry, aromatic compounds, carboxylic acids, alkenes
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