Formation of graphene oxide from carbon rods of zinc-carbon battery wastes by audiosonic sonication assisted by commercial detergent

Dwandaru, Wipsar Sunu Brams; Parwati, Lia Desi; Wisnuwijaya, Rhyko Irawan

doi:10.1016/j.npe.2019.03.001

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…Audiosonic waves are common waves which the human ear immediately perceives (Hendrawan et al, 2020). Hearing levels are not sensitized due to unaccustomed hearing levels at birth, but the sensitivity level of human hearing decreases as humans get older (Dwandaru et al, 2019). Audiosonic waves would not be heard normally after humans are at an older age ("Audiosonic Sounds the All Clear," 2001).…”

Section: Resultsmentioning

confidence: 99%

Educational Music and Sounds Through the Lens of Theodor Adorno and Immanuel Kant

Saputra,

Fransiska,

Dina

et al. 2023

J. Neosantara Hybrid Learning

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Background research is based on the assumption that music is likened to mirrors, languages, sound reflections, rhythms, harmonies and melodies. Harmonization was later adopted by education, especially music education worldwide. Music's reflection through education would not be separated from the music education's foundation, which is called philosophy. Thus, researchers subsequently highlighted philosophical foundations of music itself upon encountering education globally. Moreover, research in Indonesia rarely examines philosophical impulses with music (which is connected to sound and voice). Systematically thinking, radical to the roots in search of wisdom on sound (which comes from the vibration of the universe) and sound (which comes from living beings) in music became the aim of this research. Qualitative research method used here is bibliographic research by looking for secondary sources of previous research to establish relationships between Immanuel Kant and Theodor Adorno's ideas. Both philosophers' thoughts on sound and voice are explored through previous research or authors have discussed them in quantitative studies. The authors discuss it through quantitative research. Results show that both sound and voice based on Kant and Adorno both lead to a diversity of expressions without needing a categorical supplement

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Section: Resultsmentioning

confidence: 99%

Educational Music and Sounds Through the Lens of Theodor Adorno and Immanuel Kant

Saputra,

Fransiska,

Dina

et al. 2023

J. Neosantara Hybrid Learning

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“…Here, we applied the graphene doping strategy to further adjust the temperature sensitivity of PEDOT: PSS nanowires. Since the mixtures are required to be dispersed in aqueous solution for capillary filling, the oxidation form of graphene (GO) was used, which contains many oxygen-containing functional groups, such as hydroxyl, epoxide and carboxyl groups and ensures its good solubility in aqueous solution (Wang et al, 2009;Chen and Li, 2012;Lee et al, 2012;Dwandaru et al, 2019). The doped mixtures were characterized by FT-IR (Figure S2 in Supporting Information), the mixtures have the same characteristics as PEDOT: PSS and contain the specific bands of GO, which proves that the two materials have been fully mixed and the chemical structures of PEDOT: PSS and GO are well-maintained.…”

Section: Doping Effectmentioning

confidence: 99%

Simultaneously Optimize the Response Speed and Sensitivity of Low Dimension Conductive Polymers for Epidermal Temperature Sensing Applications

Tang

Zhang

et al. 2020

Front. Chem.

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Low dimension poly(3,4-ethylenedioxythiophene) poly (styrenesulfonate) (PEDOT: PSS) has been applied as resistor-type devices for temperature sensing applications. However, their response speed and thermal sensitivity is still not good enough for practical application. In this work, we proposed a new strategy to improve the thermal sensing performance of PEDOT: PSS by combined micro/nano confinement and materials doping. The dimension effect is carefully studied by fabricating different sized micro/nanowires through a low-cost printing approach. It was found that response speed can be regulated by adjusting the surface/volume (S/V) ratio of PEDOT: PSS. The fastest response (<3.5 s) was achieved by using nanowires with a maximum S/V ratio. Besides, by doping PEDOT: PSS nanowires with Graphene oxide (GO), its thermo-sensitivity can be maximized at specific doping ratio. The optimized nanowires-based temperature sensor was further integrated as a flexible epidermal electronic system (FEES) by connecting with wireless communication components. Benefited by its flexibility, fast and sensitive response, the FEES was demonstrated as a facile tool for different mobile healthcare applications.

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“…More specifically, GO synthesis using X-ray irradiation and audio sonication exposure methods have also been conducted [9,10]. X-ray irradiation upon (pure) water is called radiolysis [11], whereas the audio sonication method uses sound wave in audio frequency range i.e.…”

Section: Introductionmentioning

confidence: 99%

Graphite Exfoliation using MnO2 Paste via Sonication in Irradiated Water for Volumetric-Shrinkage Resistant Sponge

et al. 2022

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Graphite exfoliation has been the main mechanism to produce graphene material and its derivatives, such as graphene oxide (GO) and reduced GO (rGO). This study was aimed to exfoliate graphite using MnO2 paste in Zinc-Carbon (ZnC) battery wastes via audio sonication in X-ray irradiated water. The exfoliated graphite (EG) sample was then characterized using UV-Vis spectrophotometry, FTIR spectroscopy, XRD, and SEM. The EG sample was utilized as an additive for producing sponge with heat-induced volumetric-shrinkage resistance property. The irradiated water was obtained by exposing X-ray radiation upon distilled water. The graphite and K2MnO4 were mixed in the irradiated water followed by audio sonication accompanied by stirring and heating. The K2MnO4 was obtained from the MnO2 paste added with KOH. The UV-Vis results showed a shouldering peak at 271 nm indicating that the graphite was succesfully exfoliated. The FTIR test showed the presence of hydroxyl, C-O, CO2, N-O, and C=C functional groups. The XRD showed a peak at 12° for the EG sample similar to the XRD peak of GO. The SEM images showed layers of graphene flakes. The threshold temperature values of the sponge, sponge with EG (sponge+EG), and sponge with graphite (sponge+graphite) were 399.20, 271.03, and 414.82 °C, respectively. The sponge+EG underwent less volume shrinkage compared to ordinary sponge and sponge+graphite, which confirms its volume shrinkage resistant upon heating. HIGHLIGHTS We have exfoliated graphite using MnO2 paste obtained from ZnC battery wastes via audio sonication in X-ray irradiated water The UV-Vis characterization of the exfoliated graphite shows a shouldering peak at 271 nm. The FTIR test shows the presence of hydroxyl, C-O, CO2, N-O, and C=C functional groups. The XRD diffractogram shows a peak at 12° of an amorphous material. Finally, the SEM image shows layers of graphene flakes The exfoliated graphite is used as an additive to produce a volume-shrinkage resistant sponge, which underwent less volume shrinkage compared to ordinary sponge and sponge with graphite GRAPHICAL ABSTRACT

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Formation of graphene oxide from carbon rods of zinc-carbon battery wastes by audiosonic sonication assisted by commercial detergent

Cited by 12 publications

References 23 publications

Educational Music and Sounds Through the Lens of Theodor Adorno and Immanuel Kant

Educational Music and Sounds Through the Lens of Theodor Adorno and Immanuel Kant

Simultaneously Optimize the Response Speed and Sensitivity of Low Dimension Conductive Polymers for Epidermal Temperature Sensing Applications

Graphite Exfoliation using MnO2 Paste via Sonication in Irradiated Water for Volumetric-Shrinkage Resistant Sponge

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