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Acta Chimica Asiana
Published by Universitas Mataram
ISSN : 2550049x     EISSN : 25500503     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Acta Chimica Asiana (online ISSN 2550-0503, print ISSN 2550-049x) is a peer-reviewed, open access journal that publishes high-quality original research articles as well as review articles and short communication in all areas of Chemistry, including Chemical Education and Chemical Engineering. The editors welcome original contributions that have not been published and are not under consideration elsewhere. This journal is published by the Himpunan Kimia Indonesia Cabang Nusa Tenggara (Indonesian Chemical Society, Nusa Tenggara Division). All papers published free of charge
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 70 Documents
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Synthesis Of Paramagnetic Merkapto Silica Hybrid From Rice Husk Ash For Ag(I) Adsorben Saral Dwi Miftiyati; Saprini Hamdiani; Made Ganesh Darmayanti
Acta Chimica Asiana Vol. 1 No. 2 (2018)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v1i2.19

Abstract

A study has been conducted on the synthesis of paramagnetic mercapto silica hybrids as metal adsorbent of Ag(I). The aim of this study was to synthesis paramagnetic mercapto silica hybrid from rice husk ash waste, knowing the characteristics of paramagnetic mercapto silica hybrid from rice husk ash waste, and to determine the effect of pH, metal ions concentration, and the contact time on the value of adsorption capacity (Q). Based on the results of the study, it was found that paramagnetic mercapto silica hybrids can be synthesized from the rice husk ash waste. Characterization using FTIR spectroscopy showed that silanol (Si-OH), siloxan (Si-O-Si), -SH, and Fe-OH functional groups, and characterization of paramagnetic mercapto silica hybrid structures using XRD to show crystalline compounds with a position value of 2θ = 35.4 which showed that the magnetite material of Fe3O4 was coated by silica. Paramagnetic mercapto silica hybrids from rice husk waste can be used as adsorbent of Ag (I) metal at optimum conditions of pH 3, contact time of 120 minutes, and adsorption capacity of 392.01 mg/g. The suitable isotherm model is the Freundlich isotherm model which means the absorption of metal Ag (I) occurs physically, while adsorption of kinetics followed the pseudo II order kinetic model with a value of k = 3.01 g.mg-1 minute-1.
Green synthesis, characterization, and electrochemical behavior of gold nanoparticles on boron-doped diamond electrode Wiyogo Prio Wicaksono; Aushofin Hamidah
Acta Chimica Asiana Vol. 1 No. 1 (2018)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (550.057 KB) | DOI: 10.29303/aca.v1i1.1

Abstract

Gold nanoparticles (AuNPs) have been successfully synthesized through a single-step bioreduction method using Piper betle leaf extract (PBLE) as a green reducing and stabilizing agent. Their formation was confirmed by UV-Visible spectroscopy, resulted in a characteristic Surface Plasmon Resonance (SPR) peak at 545 nm, whereas there is no peak observed in the extract. By using Particle Size Analyzer (PSA), it has been characterized that they have a ~100 nm diameter. For characterizing electrochemical behavior, the cyclic voltammetry technique was applied in a various range of electrolyte condition (HCl 0.1M, NaCl 0.1M, phosphate buffer 0.1M pH 7, and NaOH 0.1M). The best oxidation and reduction peak of the AuNPs were obtained in HCl at 0.93 V and 0.68 V, respectively. This green synthesized AuNPs could be applied as a label in immunochromatographic strip tests for various sensing applications.
Synthesis Of Mesoporiic Silica From Rice Husk Ash For Pinostrobin Based Drug Delivery Rifia Wulandari; Saprini Hamdiani; Nurul Ismillayli
Acta Chimica Asiana Vol. 2 No. 1 (2019)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v2i1.20

Abstract

A study has been conducted on the synthesis of mesoporous silica as introductory material pinostrobin anticancer compounds. The aim of this study was to synthesis paramagnetic mesoporous silica from rice husk ash waste; knowing the characteristics of silica gel and mesoporous silica from rice husk and the value of adsorption capacity (Q). Based on the results of the study, it was found that mesoporous silica can be synthesized from the rice husk ash waste. Characterization using FTIR produces silanol (Si-OH), and siloxan (Si-O-Si). The use of 30% w/w tartaric acid as a template doesn’t change the functional groups of silica. The optimum conditions of adsorption of pinostrobin compounds by mesoporous silica at the adsorption capacity of 7.049 mg/g. In simulated intestinal fluids (pH 7.4),pinostrobin is released slowly at every hour, then slightly increases at the 10th hour and continues to increase again slowly so that the pinostrobin compound is completely released at 12 hours.
Corrosion Inhibition Efficiency Of Nicotine Based On Quantum Chemical Study Yayuk Wirayani; Maria Ulfa; Yahmin Yahmin
Acta Chimica Asiana Vol. 1 No. 2 (2018)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v1i2.29

Abstract

The effect of substituents, electron donor groups (NH2, OH, CH2OH and CH3) and electron withdrawal groups (NO2, COOH, and Cl), to the efficiency of corrosion inhibition of nicotine has been studied using theoretical studies. The effect of substituents toward the efficiency of corrosion inhibition of nicotine based on quantum parameters (EHOMO, ELUMO, Egap, I, χ, dan ΔN). The efficiency of corrosion inhibition based on quantum parameters is NH2 > OH > CH2OH > CH3 > BN > Cl > COOH > NO2. The addition of electron donor group NH2 has the highest inhibitory efficiency of 99.79 %. In contrast, the presence of electron withdrawal group NO2 has the opposite effect.
Indonesian Modified Clay for Dye Waste Treatment Iwan Sumarlan; Is Fatimah; Karna Wijaya
Acta Chimica Asiana Vol. 3 No. 1 (2020)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.156 KB) | DOI: 10.29303/aca.v3i1.11

Abstract

Synthesis and Characterization of TiO2 Coated on Clay Pillared Alumina (PILC) for Methyl Orange Photodegradation Under UV Illumination. The synthesis included both pillarization the clay with alumina and TiO2 coated on PILC using impregnation method. Some characterizations also were employed to this research such as X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), N2 Adsorption Isotherm and UV-Visible Diffuse Reflectance (DR UV). The photocatalyst was then used to decompose waste dye, methyl orange (MO). Among three photocatalysts that were successfully synthesized, PILC Ti 1.0% had the highest activity to decompose the waste dye.
Theoretical Study of the Substituent and Nitrogen Number Effects on the Uranium Binding Selectivity of Crown Ethers Saprizal Hadisaputra; Agus Abhi Purwoko; Ria Armunanto; Harno Dwi Pranowo
Acta Chimica Asiana Vol. 3 No. 1 (2020)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.454 KB) | DOI: 10.29303/aca.v3i1.30

Abstract

The compounds, [UO2(dibenzo-18-crown-6)]2+ and [UO2(18-crown-6)]2+, as well as their related complexes: numerous disubstituted dibenzo-18-crown-6 and azacrown complexes are studied using density functional theory (DFT). Quasi-relativistic effective core potentials developed in the Stuttgart and Dresden groups was used together with the accompanying basis set for uranium and DZP basis set was used for crown ether atoms. The effects of substituent and nitrogen number on the binding selectivity were discussed in term of the structural parameter, atomic charge and interaction energy, thermodynamic parameters, and charge transfer. The electron donating substituents increase the capability of dibenzo-18-crown-6 toward UO22+ ion. In contrast, the electron withdrawing substituents have the opposite effect. It clearly shows that UO22+ prefers N donor recognition. For the systems involved, the result shows that the hexaaza-18-crown-6 exhibits the largest metal interaction capability to UO22+ ion. The calculated results are in a good agreement with the experimental values.
Quantitative Analysis Of Fˉ Ion Recognition By A New Chemosensor from Flavon Group R Rahmawati; Syarifa Wahidah Al-Idrus; Baiq Nila Sari; Bambang Purwono; Sabirin Matsjeh
Acta Chimica Asiana Vol. 3 No. 1 (2020)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (522.901 KB) | DOI: 10.29303/aca.v3i1.17

Abstract

A new chemosensor S8 compound from the flavon group that has been successfully synthesized. Test its ability as a chemosensor for F- anion, providing positive results that it can recognize F- anion with response to an increase in fluorescent solution. Titration of S8 solution in DMSO solvents was carried out with F- anion at various concentrations and then measurements were made on fluorometry instruments. The fluorescent titration emission spectrum shows that the S8-Fˉ host-guest interaction quantitatively in the form of LOD and kass. LOD and Kass values are 6.43 × 10ˉ4 M and 2 × 106 Mˉ1, respectively.
Green Synthesis of Carbon Nanotubes from Coconut Shell Waste for the Adsorption of Pb(II) Ions Yusuf Zaim Hakim; Yoki Yulizar; Adi Nurcahyo; Magun Surya
Acta Chimica Asiana Vol. 1 No. 1 (2018)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.683 KB) | DOI: 10.29303/aca.v1i1.2

Abstract

Numerous complex methods have been developed for the preparation of carbon nanotubes (CNT) such as laser vaporization, arc discharge, pyrolysis, and chemical vapour deposition (CVD). In this study, an environmentally friendly and convenient method called one-step water assisted (quenching) synthesis method was conducted from graphite flakes, which were taken from coconut shell wastes to produce carbon nanotubes. Chemical and physical structure of the carbon nanotubes were characterized by FTIR (Fourier Transform Infrared), Scanning Electron Microscope (SEM), and Transmission Electron Microscopy (TEM). Adsorption performance of heavy metals Pb(II) ions by CNTs has been evaluated using the stirring method, and the concentration of Pb(II) ions has been determined using Atomic Absorption Spectroscopy (AAS). The adsorption conditions such as pH and contact time have been obtained. The results showed that carbon nanotubes were a bit successfully formed, in which the tubes distribution are scattered irregularly. The average tube diameter was 123 nm. During the adsorption test, it was found that the adsorption was proportional to the contact time, in which the optimum contact time was 20 minutes. The optimum pH of Pb(II) ions absorption was 5 where the potential for Pb(II) ions absorption was 120 %. The results indicate the true potential of this green chemistry based method, and it opens the chance for possibility to produce carbon nanotubes at a larger scale.
Thermodynamics and Kinetics of Adoption of Ag (I) on Paramagnetic Silica Rice Husk Ash Surface Wardian Antoni; Saprini Hamdiani; Siti Raudhatul Kamali
Acta Chimica Asiana Vol. 2 No. 1 (2019)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v2i1.32

Abstract

Synthesis of paramagnetic silica from rice husk ash has been carried out as an adsorbent for heavy metal Ag (I). This study tried to synthesis and characterized the thermodynamics and kinetics behaviour of paramagnetic silica from the husk ash as metal adsorbent Ag (I). Determination of optimal conditions for adsorption of metal ions Ag (I) is carried out by varying the pH, concentration, and contact time of the adsorbent. The results showed that the optimum pH was at pH 3, optimal concentration Ag(I) of 350 ppm and optimal contact time of 90 minutes. At optimal conditions, paramagnetic silica adsorption capacity for metal ion Ag (I) is 323.62 mg/g. The isotherm model that is suitable for paramagnetic silica is the Freundlich isotherm model. The kinetic model that is suitable for paramagnetic silica is the Pseudo Order 2 kinetic model.
Effect of Bongi Me’e Liquid Soap Toward Staphylococcus Epidermidis Farid Wajdi; Suhratul Aini; Fitria Aprillah Nardi; Desy Komalasari
Acta Chimica Asiana Vol. 2 No. 1 (2019)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (513.527 KB) | DOI: 10.29303/aca.v2i1.9

Abstract

Acne or commonly referred as Acne Vulgaris is a chronic skin disease due to abnormalities of sebum production in sebaceous glands caused by Staphylococcus epidermis bacteria. Acne treatment is usually done by using antibiotics, both topical and oral like Clindamycin 1%. However, the long-term use of antibiotics might lead to resistant of Propionibacterium acne strains or immune to Clindamycin 1%. People in Bima, particulary in Wawo district have local wisdom, that is facial using Bongi Me’e which is a traditional scrubs made of rice, tamarind, and temu giring extract that officacious as antibacterial. The purpose of this study was to determine the effectiveness of Bongi Me’e liquid soap as the antibacterial against Staphylococcus epidermis. In this research, four soap formulas were formulated and tested using well diffusion method. Formula 1 (4 ml rice extract, 3 ml temu giring extract and 2 ml tamarind extract). Formula 2 ( 2 ml rice extract, 3 ml temu giring extract and 4 ml tamarind extract). Formula 3 (2 ml rice extract, 4 ml temu giring extract, and 3 ml tamarind extract). Formula 4 (4 ml rice extract, 2 ml temu giring extract, and 3 ml tamarind extract). The inhibitory zone test indicated that the highest diameter of inhibition zone obtained in the formula 1 of 29,3 mm, followed by the formula 2 of 28 mm, formula 4 of 26,6 mm, and formula 3 that has smallest inhibitory zone by 25 mm. So, the antibacterial Bongi Me’e liquid soap was effective to inhibit acne-cause bacteria Staphylococcus epidermis

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