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Chemistry and Materials
ISSN : 2828271X     EISSN : 28282310     DOI : https://doi.org/10.56425/cma
Core Subject : Science,
Chemistry and Materials is a peer-reviewed journal published by The Center for Science Innovation (Pusat Inovasi Sains). The journal covers all aspects of Chemistry and Materials including synthesis, characterization, and applications. Theoretical and computational studies are also welcome.
Articles 12 Documents
Effect of Temperature and Feeding Time in Zero-Valent Iron (ZVI) Synthesis with Polyphenol Extracts of Kepok Banana Peels Yusmaniar Yusmaniar; Affif Alfiansyah; Mega Sutrisno
Chemistry and Materials Vol. 1 No. 1 (2022)
Publisher : Pusat Inovasi Sains

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Abstract

In this research, zero-valent iron (ZVI) was synthesized from kepok banana peels extracts as reducing agent. The fourier transform infrared spectrum showed a clear peak at a wavenumber of 600 cm-1 that could be assigned to Fe-O bond. XRD measurement results prove that ZVI has been successfully formed. The resulting ZVI particles are spherical granules with heterogeneous sizes and close together or agglomerating. Based on the results, it was found that the optimum ratio between FeSO4 and polyphenols for ZVI preparation is 4 : 1. Based on the particle size distribution analysis, it was shown that the optimum feeding temperature and time for ZVI synthesis were 25 oC and 30 minutes, respectively.
Preparation of Polyaniline/Polypyrrole Thin Films as Electrode in Salt Water Dechlorination Maryanti; Yusmaniar
Chemistry and Materials Vol. 1 No. 1 (2022)
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Abstract

Chlorine is a chemical element that is widely used in daily life that require for dechlorination process to prevent the environment. One method that can be used to treat chlorine waste is through dechlorination. During the dechlorination process, electrodes that chemically stable properties are used. This study aims to test the dechlorination of polyaniline (PANI), polypyrrole (PPy), and various compositions of PANI/PPy composite. FTIR shows related functional groups found in PANI, PPy, and PANI/PPy. XRD shows that the PANI formed was in the semicrystalline phase, while PPy was in the amorphous phase. The conductivity test shows that the PANI sample has the highest conductancy value compared to the PPy or PANI/PPy samples. PANI/PPy with composition ratio of 75/25 had the highest difference in conductance values compared to other composites. The highest dechlorination efficiency value occurred in PANI at a voltage of 1.8 V, which was 1.9%. Meanwhile, in PANI/PPy composite, the highest dechlorination efficiency value came from PANI/PPy 75/25, which was 0.97%.
Electrodeposition of PANI-NiO as Electrode for Deionization K+ and Cl- Annisa Auliya; Raka Deswara; Maria Paristiowati; Setia Budi
Chemistry and Materials Vol. 1 No. 1 (2022)
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Abstract

This study aims to synthesize thin film of polyaniline-nickel oxide (PANI-NiO) as an electrode in capacitive deionization (CDI) technology. Thin film PANI-NiO were synthesized by electrodeposition method with different applied potentials. The FTIR spectrum and XRD pattern confirmed that PANI-NiO has been successfully synthesized. Based on the SEM-EDX data, PANI-NiO has a tightly stacked granular morphology, which consist of Fe, Cr, S, Ni, O, and C elements. Based on experimental results, the highest capacitance come from PANI-NiO 1.25 V with a value of 475.24 F/g. PANI-NiO 1.25 V also has a small resistance, which is 13.55 Ω. Salt reduction efficiency test for PANI-NiO 1.25 V also shows the highest salt reduction efficiency compared to other electrodes. Owing to its high capacitance, low charge transfer resistance, and high salt reduction capacity, the PANI-NiO prepared at 1.25 V might be a potential material to be developed for the electrolyte deionization application.
The Effects of Aniline Concentration and Deposition Time on Polyaniline Conductance as Substrate in Fe/Ni Electrodeposition Mega Sutrisno; Maria Paristiowati; Nailah Fauziyyah
Chemistry and Materials Vol. 1 No. 1 (2022)
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Abstract

The research aims to determine the influence of aniline concentration and deposition time on the characteristics of polyaniline prepared using potentiostatic and galvanostatic electrodeposition methods. FTIR characterization data shows the typical peak of polyaniline in the form of the presence of a quinoid functional group at a wavenumber of 1596.16 cm-1. The typical diffraction pattern of polyaniline using XRD was detected at peaks of 2θ 21.1007o and 23.5995o. Polyaniline formed using SEM has a surface morphology that grows in a stacked and irregular manner and has a high conductance value so that it can be used as a substrate in Fe/Ni electrodeposition. The results of the Fe/Ni electrodeposition process when viewed using SEM cause the polyaniline surface morphology to be covered by a Fe/Ni alloy by having an elemental composition from the EDS test data, are iron (Fe) 68.15% and nickel (Ni) 24.83%. Fe/Ni levels from AAS data attached to PANI(pot)-Fe/Ni are 1.1912 ppm and 0.8288 ppm; in PANI(gal)-Fe/Ni are 1.2219 ppm and 0.8392 ppm.
Synthesis and Characterization of High Conductivity Polyaniline Prepared at Room Temperature Setia Budi; Eka Puspa Rini; Maria Paristiowati; Agung Imaduddin; Devi Syafei
Chemistry and Materials Vol. 1 No. 1 (2022)
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Abstract

In this study, polyaniline was successfully synthesized using an oxidative polymerization method at room temperature. The polymerizations were carried out with and without stirring process under ultraviolet (UV) irradiation. The polyaniline was characterized by FTIR, XRD, SEM, SAA, and Four Point Probe. It is found that UV irradiation and stirring could increase the surface area and conductivity of polyaniline. The surface area obtained for stirred and unstirred polymerization were 37.9 m2/g and 29.0 m2/g, respectively. Moreover, conductivity values for stirred and unstirred polymerization were found as 1.22 S/cm and 1.08 S/cm respectively. This result shows that polyaniline synthesized by stirring treatment obtained uniform morphology, smaller size, greater crystallinity, higher BET surface area, and higher conductivity than that that of without stirring.
Review: Potensi dan Masalah dalam Pengembangan Kemandirian Bahan Baku Obat Tradisional di Indonesia Babay Asih Suliasih; Abdul Mun'im
Chemistry and Materials Vol. 1 No. 1 (2022)
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Abstract

Penggunaan herbal untuk tujuan kesehatan sudah banyak dilakukan sejak beribu tahun yang lampau, jauh sebelum ditemukannya obat kimia sintetis. Indonesia merupakan salah satu negara di dunia yang terkenal memiliki keanekaragaman hayati yang besar di mana memiliki sekitar 30.000 jenis tanaman yang merupakan 75% dari jumlah tanaman di dunia sehingga Indonesia dikenal dengan mega-center keanekaragaman hayati dunia. Dengan demikian, Indonesia memiliki potensi yang sangat besar dalam industri obat tradisional yang dapat bersaing di tingkat dunia. Namun dalam pengembangan bahan baku tradisional dan produksi obat tradisional terdapat beberapa masalah yang dapat menghambat pertumbuhan industri obat tradisional, di antaranya bahan baku herbal yang tidak memenuhi syarat, iklim usaha yang kurang kondusif, teknologi rancang bangun untuk produksi bahan baku ekstrak yang masih sangat kurang, ketersediaan laboratorium pihak ketiga yang tidak merata di wilayah Indonesia sehingga menyulitkan industri menengah dan kecil yang mengalami keterbatasan fasilitas untuk pengujian produk, belum masuknya obat tradisional dalam program JKN, dan kurangnya bukti empiris dari tanaman yang berpotensi sebagai bahan baku obat tradisional. Untuk mengatasi masalah ini, perlu dukungan yang intensif dan sinergi dari pemerintah dan badan legislatif yang dapat mengeluarkan kebijakan-kebijakan untuk mempercepat perkembangan Industri Obat Tradisional. Selain itu, kerja sama yang baik dengan para pelaku usaha, akademisi, dan organisasi kemasyarakatan juga diperlukan dalam mewujudkan kemandirian bahan baku obat tradisional.
The Effects of Deposition Time on Phase and Structure of FeCoNi Films Muhamad Mulyadi; Afrizal
Chemistry and Materials Vol. 1 No. 2 (2022)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1115.278 KB) | DOI: 10.56425/cma.v1i2.23

Abstract

This study aims to determine the effects of deposition time on the phase and structure of FeCoNi. FeCoNi was prepared by electrodeposition method at room temperature. X-ray diffraction measurement shows the formation of a single phase of FeCoNi at 5 and 10 minutes of deposition, while at 20, 35, and 50 minutes, a new phase was formed, namely CoNi. The obtained FeCoNi and CoNi show a crystal plane at 2θ = 44.05° (111); 51.33° (002); and 75.59° (022) in all different deposition times, indicating the face centered cubic crystal structure. The effect of deposition time on the chemicals composition shows an anomalous co-deposition because Fe has a larger ratio than Co and Ni. The deposition rate and the value of current efficiency were found to be optimum at FeCoNi synthesized for 20 minutes, namely 0.00214 mg/cm2s and 97.00%.
Synthesis and Characterization of Zero Valent Iron Prepared Using Green Synthesis Method Devi Indrawati Syafei; Sahid Hidayat; Yusmaniar
Chemistry and Materials Vol. 1 No. 2 (2022)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (977.551 KB) | DOI: 10.56425/cma.v1i2.24

Abstract

This research was conducted to develop a green synthesis method for zero valent iron (ZVI) preparation. The ZVI was synthesized by reacting FeCl2 with polyphenols extracted from kepok banana peels. This polyphenol extraction process was carried out using three different solvents, namely: water, chloroform, and ethyl acetate. Gas chromatography mass spectroscopy test showed three main phenolic compounds contained in the banana peel extract, namely: 2-methoxy-4-vinylphenol, 4-methoxy-2-vinylphenol, and 2-methoxy-5-vinylphenol. The optimum composition of FeCl2 and polyphenol was 3:2. Fourier transform infra red spectroscopy data confirmed that the synthesized ZVI contains organic compounds having –OH and C=O groups which are assumed to be capping agents that can maintain stability. This has also been supported by the results of the energy dispersive X-ray analysis where there are carbon atoms (C) and oxygen atoms (O) in ZVI. The ZVI particle size was uneven and form a compact solid. The largest particle size distribution of ZVI is in the range of 234.49 nm - 407.49 nm with the average size of ZVI beings 616.26 nm. The results of the XRD analysis have also confirmed the formation of a simple cubic ZVI with fine crystallite size of ca 26.64 nm.
The Effect of Temperature and pH on FeCoNi Film Electrodeposition Ananda Ico Novtiar Turmiasaputri; Erfan Handoko; Setia Budi
Chemistry and Materials Vol. 1 No. 2 (2022)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1168.678 KB) | DOI: 10.56425/cma.v1i2.25

Abstract

This paper reports the effect of temperature and electrolyte pH on the electrodeposition of FeCoNi film. The FeCoNi electrodeposition was carried out from sulfate solution using the potentiostatic technique. The higher temperature increased deposition rate, thickness of the deposit, and size of the FeCoNi crystallites. The obtained FeCoNi films were characterized by X-ray diffractometer (XRD) and energy dispersive X-Ray (EDX). XRD analysis confirmed typical diffraction patterns of awaruite phase. EDX evaluation indicated that the relative weight increases in pH from 2.5 to 4, the composition of wt% Fe deposited increased from 39.2% to 47.9%, while wt% Co and wt% Ni decreased from 36.2% to 33.5 % and 24.6% to 18.6%.
The Effect of Tertiary Butylhydroquinone Antioxidant on The Stability of Rubber Seed Biodiesel Salma Fitri Annisa; Zulmanelis Darwis; Tritiyatma Hadinugrahaningsih
Chemistry and Materials Vol. 1 No. 2 (2022)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (942.775 KB) | DOI: 10.56425/cma.v1i2.26

Abstract

This study aims to determine the effect of the addition of tertiary butylhydroquinone (TBHQ) antioxidants on the quality of biodiesel. Rubber seed biodiesel is synthesized through esterification and transesterification reactions, then biodiesel is characterized by different stages of adding TBHQ antioxidants before the esterification reaction and after the transesterification reaction. The usage of TBHQ antioxidants at the various stages of adding the process greatly affects the quality of biodiesel. The results showed that the addition of TBHQ 1000 ppm after transesterification was the most effective in slowing oxidative degradation by showing the lowest characteristics (acid number 0.64 mg KOH/g and peroxide value 33.91 meq O2/kg) for 3 weeks. All rubber seed biodiesel samples had kinematic density and viscosity according to the Indonesian National Standard (SNI) for 3 weeks except for the acid number only lasted 0 weeks.

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