Robi Dwiputra Satria, - (2024) PENGARUH LAPISAN rGO PADA LaFeO3 YANG DI-DOPING Mn TERHADAP ENERGI ADSORPSI MOLEKUL ETANOL MENGGUNAKAN DENSITY FUNCTIONAL THEORY. S1 thesis, Universitas Pendidikan Indonesia.
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Abstract
LaFeO3 (LFO) telah banyak diaplikasikan sebagai material penyusun sensor gas. Namun, resistansi pada material LFO masih sangat tinggi serta nilai sensitivitas dan selektivitas yang rendah. Doping pada LFO dilakukan untuk meningkatkan sensitivitas dan selektivitas sensor gas. Penambahan lapisan monolayer juga digunakan untuk mendapatkan kepekaan gas-sensing yang lebih baik dan kinerja respon yang cepat. Pada penelitian ini, dilakukan komputasi berbasis Density Functional Theory (DFT) untuk analisis pengaruh lapisan reduced graphene oxide (rGO) pada LFO yang di-doping Mangan (Mn) terhadap energi adsorpsi molekul etanol sebagai material sensor gas etanol. Berdasarkan penelitian ini, diperoleh bahwa adanya doping Mn dan monolayer rGO dapat meningkatkan energi adsorpsi. Energi adsorpsi molekul etanol terhadap sistem LFO yang di-doping Mn tanpa lapisan rGO bernilai -3.93 eV dan setelah adanya penambahan lapisan rGO bernilai -4.35 eV; hal ini menunjukkan eskalasi energi sekitar 10.68%. Dengan terjadinya peningkatan tersebut, proses adsorpsi pada sistem LFO yang di-doping Mn dan dilapisi rGO terhadap molekul etanol menjadi semakin kuat, sehingga menjadi potensial untuk dijadikan sebagai material sensor gas etanol. LaFeO3 (LFO) is a material that has been widely applied as a material for gas sensors. However, the resistance of the LFO material is still very high, also the sensitivity and selectivity values are low. Doping on the LFO is carried out to increase the sensitivity and selectivity of the gas sensor. The addition of a monolayer is also used to obtain better gas-sensing sensitivity and fast response performance. In this research, Density Functional Theory (DFT) based computing was carried out to analyze the effect of the reduced graphene oxide (rGO) layer on Manganese (Mn) doped LFO on the adsorption energy of ethanol molecules as an ethanol gas sensor material. This research found that Mn doping and a monolayer of rGO can increase the adsorption energy. The adsorption energy of ethanol molecules on the Mn-doped LFO system without the rGO layer is -3.93 eV, and after the addition of the rGO layer, it is -4.35 eV; this shows an energy escalation increase of around 10.68%. With this increase, the adsorption process in the Mn-doped and rGO-coated LFO system towards ethanol molecules becomes more robust, so it has the potential to be used as an ethanol gas sensor material.
| Item Type: | Thesis (S1) |
|---|---|
| Additional Information: | ID SINTA Dosen Pembimbing: Endi Suhendi : 5976806 Waslaluddin : 6099556 |
| Uncontrolled Keywords: | density functional theory, etanol, LaFeO3, Mangan, reduced graphene oxide, sensor gas |
| Subjects: | Q Science > QC Physics |
| Divisions: | Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Jurusan Pendidikan Fisika > Program Studi Fisika (non kependidikan) |
| Depositing User: | Robi Dwiputra Satria |
| Date Deposited: | 24 Apr 2024 08:46 |
| Last Modified: | 24 Apr 2024 08:46 |
| URI: | http://repository.upi.edu/id/eprint/116799 |
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