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All Journal Jurnal Kartika Kimia al Kimiya : Jurnal Ilmu Kimia dan Terapan
Tety Sudiarti
Jurusan Kimia, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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Characteristics of Cellulose Acetate Composite Membranes (Ca/Cs, Ca/Pva, Ca/Peg) As Cu(Ii) Metal Ion Filtration Membranes Amalia, Vina; Sudiarti, Tety; Mufidah, Rafa; Yuliarti, Yuliarti; Nisrin, Yusrina; Rohmatulloh, Yusuf
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 11, No 1 (2024): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v11i1.34722

Abstract

Industrial development in Indonesia has caused increased pollution, including water pollution by heavy metals, one of which is the metal ion Cu(II). Cellulose acetate composite membranes have been widely used to overcome the problem of Cu(II) metal ion content in water, however, studies on the performance of cellulose acetate membranes with various types of chitosan, polyvinyl alcohol (PVA) and polyethylene glycol (PEG) composites have not been widely reported. This research aims to analyze the characteristics of cellulose acetate composite membranes with chitosan, PEG, and PVA using FTIR and SEM and to determine the performance of these cellulose acetate composite membranes in filtering Cu(II) metal from the resulting rejection values. The membrane was made using the phase inversion method and the composite membrane was made using the dip-coating method. The results of characterization using FTIR showed that there were no new peaks in all cellulose acetate composites, so there were only physical interactions in the composites. SEM analysis shows that the surface of the composite membrane is more irregular and the porosity increases. The performance of the composite membrane in filtering Cu(II) metal is better than the pure cellulose acetate membrane.
Density Functional Theory Investigation of NO2 Gas Adsorption Properties on X12Y12 Nanocages (X= B, In and Y = As, P) Ivansyah, Atthar Luqman; Yustiarini, Riska Cindi; Nasir, Jamal Abdul; Sudiarti, Tety
Jurnal Kartika Kimia Vol 8 No 1 (2025): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i1.935

Abstract

This study investigates the structural, electronic, and physical properties of X12Y12 (X = B, In, and Y = As, P) fullerene-like cages for NO2 adsorption. We employ Density Functional Theory (DFT) calculations with B3LYP methods, LANL2DZ basis set, and D4 dispersion correction to explore these properties, including ionization potential and electronic affinity linked to HOMO-LUMO gap energy. Moreover, this study explores global reactivity indices such as chemical potential, ionization potential, hardness, and softness. It also examines electronic properties, such as density of states (DOS), natural bond orbital (NBO), and electrostatic potential (ESP), along with chemical interactions like IGMH and AIMD, within the system. The findings demonstrate that the B12As12 nanocage exhibits high sensitivity to NO2 molecules, as evidenced by the bond interaction and adsorption energy of -273.33 kJ/mol, supported by UV-vis and IRI graphics, with the order of systems from the lowest to the highest adsorption energy toward NO2 : B12P12-NO2 < In12As12-NO2 < In12P12-NO2 < B12As12-NO2. AIMD simulations indicate that all nanocages can effectively adsorb NO2 within varying lengths by 1000 fs. This suggests the potential for high NO2 gas adsorption by the B12As12 nanocage. Further investigation is required to assess the potential of other nanocages.
Co-Authors Atthar Luqman Ivansyah M. Jamal Abdul Nasir Mufidah, Rafa Nisrin, Yusrina Rohmatulloh, Yusuf Vina Amalia, Vina Yuliarti Yuliarti Yustiarini, Riska Cindi