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C.A. Samarahewa Samarahewa
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- Research assistant, Department of Physics University of Peradeniya, Peradeniya Sri Lanka
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Abstract
nCarbon particles fabricated from the core of acacia tree branches were utilized to synthesize CuO/carbon composite films. The gas sensing properties of these films grown on glass substrates using the doctor blade method were measured in 1000 ppm of methanol vapor at the room temperature. All the films were annealed at 75 0C for 1 hour in air. The structure, the optical band gap and the surface morphology of the samples were determined using XRD patterns, UV-Visible spectrums and SEM micrographs, respectively. The XRD findings suggested that a single phase of CuO might crystallise as thin films. The XRD patterns were used to assess the samples’ average crystallite size, strain, and dislocation density. The peaks of carbon were not visible in the XRD patterns of the films with CuO/carbon due to the amorphous nature of carbon. Platelet particles were observed in SEM images of pure carbon samples. Mass ratio between cupric oxide (CuO) and carbon particles was varied to optimize the gas sensitivity. The gas sensitivity of carbon could be enhanced by adding CuO powder. The highest gas sensitivity (1.43) was measured for the film with 90% CuO and 10% carbon particles.
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Keywords: Cupric oxide, carbon, Acacia, gas sensitivity, methanol vapor
n[if 424 equals=”Regular Issue”][This article belongs to International Journal of Membranes(ijm)]
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References
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[1] Tseng RL, Wu FC, Juang RS. Liquid-phase adsorption of dyes and phenols using pinewood-based activated carbons. Carbon. 2003 Jan 1;41(3):487-95.
[2] Dıaz-Dıez MA, Gómez-Serrano V, González CF, Cuerda-Correa EM, Macıas-Garcıa A. Porous texture of activated carbons prepared by phosphoric acid activation of woods. Applied surface science. 2004 Nov 15;238(1-4):309-13.
[3] Wu FC, Tseng RL, Juang RS. Preparation of highly microporous carbons from fir wood by KOH activation for adsorption of dyes and phenols from water. Separation and purification technology. 2005 Dec 1;47(1-2):10-9.
[4 ] Malik PK. Dye removal from wastewater using activated carbon developed from sawdust: adsorption equilibrium and kinetics. Journal of Hazardous Materials. 2004 Sep 10;113(1-3):81-8. [5] Tancredi N, Medero N, Möller F, Píriz J, Plada C, Cordero T. Phenol adsorption onto powdered and granular activated carbon, prepared from Eucalyptus wood. Journal of colloid and interface science. 2004 Nov 15;279(2):357-63.
[6] Wu FC, Tseng RL. Preparation of highly porous carbon from fir wood by KOH etching and CO2 gasification for adsorption of dyes and phenols from water. Journal of Colloid and Interface Science. 2006 Feb 1;294(1):21-30.
[7] Peng S, Cho K. Ab initio study of doped carbon nanotube sensors. Nano letters. 2003 Apr 9;3(4):513-7.
[8] Novoselov KS, Geim AK, Morozov SV, Jiang D, Katsnelson MI, Grigorieva IV, Dubonos S, Firsov AA. Two-dimensional gas of massless Dirac fermions in graphene. nature. 2005 Nov 10;438(7065):197-200.
[9] Hsu WK, Firth S, Redlich P, Terrones M, Terrones H, Zhu YQ, Grobert N, Schilder A, Clark RJ, Kroto HW, Walton DR. Boron-doping effects in carbon nanotubes. Journal of Materials Chemistry. 2000;10(6):1425-9.
[10] Samarasekara P. Hydrogen and methane gas sensors synthesis of multi-walled carbon nanotubes. Chinese Journal of Physics. 2009 Jun 1;47(3):361-9.
[11] Samarasekara P. Gas sensing properties of tungsten oxide thin films in methane and nitric oxide gases. Nitric Oxide. 2009;2:44-50.
[12] Samarasekara P, Gunasinghe MS, Karunarathna PG, Madusanka HT, Fernando CA. Temperature dependence of gas sensitivity of ferric oxide thin films in CO2 gas, acetone, ethanol and methanol vapors. GESJ: Physics. 2019;2(22):3-11.
[13] Rajapaksha RMTD, Samarasekara P, Karunarathna PGDCK, Bandara TMWJ, Fernando CAN. Enhancement of gas sensitivity of ferric oxide thin films by adding activated carbon nanoparticles. Ionic research and engineering journals (IRE) 2021; 4(10): 107-13.
[14] Saleem M, Ali M, Siddiqi Z, Qahtani ASA. Preparation of activated carbon from acacia (Vachelliya seyal) tree branches and application to treat wastewater containing methylene blue dye. Modern. Appl. Sci. 2017; 11(12): 102-8.
[15] Farma R, Wahyuni F, Awitdrus A, Deraman MB. Physical properties analysis of activated carbon from oil parm empty fruit bunch fiber on methylene blue absorption. J. Technomaterial Phys. 2019; 1(1): 69-75.
[16] Girgis BS, Temerk Y, Gadelrab MM, Abdullah ID. X-ray diffraction patterns of activated carbon prepared under various conditions. Carbon Letters 2007; 8(2): 95-100.
[17] Mani GK, Rayappan JBB. A highly selective and wide range ammonia sensor—nanostructured ZnO: Co thin film. Mater. Sci. Eng., B 2015; 191: 41–50.
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| Volume | ||
| [if 424 equals=”Regular Issue”]Issue[/if 424][if 424 equals=”Special Issue”]Special Issue[/if 424] [if 424 equals=”Conference”][/if 424] | ||
| Received | April 9, 2024 | |
| Accepted | May 15, 2024 | |
| Published | May 21, 2024 |
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