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Chemistry and Materials
Published by The Center for Science Innovation
ISSN : 2828271X     EISSN : 28282310     DOI : https://doi.org/10.56425/cma
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Chemistry Materials Science & Nanotechnology
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.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 52 Documents
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Antioxidant Activity of AuPt Nanoparticle with Square-Wave Pulse Deposition Method Syafei, Devi Indrawati
Chemistry and Materials Vol. 3 No. 2 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i2.79

Abstract

Gold nanoparticles and platinum nanoparticles are considered to be effective antioxidants due to their ability in inhibiting free radicals. In this research, AuPt nanoparticles were synthesized using a square wave pulse deposition method by varying the lower potential (EL). The XRD results stated that AuPt nanoparticles had formed on the FTO substrate. The shape of AuPt nanoparticles is an irregular sphere in SEM-EDX characterization. EDX characterization also concluded that AuPt nanoparticles had formed on the FTO substrate. Antioxidant testing using the DPPH test resulted the largest inhibition value for AuPt NPs, with a lower potential of -0.6 V and the inhibition activity of 77.17%.
Synthesis Dithizone-Immobilized In Polivinyl Chloride Membranes For Copper Detection in Water Pratiwi, Yussi; Febrian, Yogi; Klaudia, Angelina
Chemistry and Materials Vol. 3 No. 2 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i2.80

Abstract

A simple, cost-effective, and environmentally friendly analytical method is needed to determine Cu (II) levels in water. Many methods have been developed by immobilizing dithizone in a polyvinyl chloride (PVC) matrix with dioctyl phthalate (DOP) as a plasticizer in a tetrahydrofuran (THF) solvent. However, the optimal composition of PVC, DOP, and THF has not been determined. The purposes of this study were to determine the optimal composition of dithizone, PVC, and DOP for the sensor membranes, evaluate the performance of the chemical sensors in detecting Cu (II) ions, and measure the copper content in conventional drinking water. The research began with the fabrication of sensor membranes, followed by absorbance testing, and concluded with method validation through characterization. Adsorption of Cu (II) caused the membrane colour to change from yellow to reddish orange, with maximum absorbance observed at 427 nm. The sensor membrane exhibited the best response to Cu (II) ions at pH 2.8. A linear calibration curve for Cu (II) was obtained in the concentration range of 0-0.6 ppm, with an R² value of 0.9924. The limit of detection was 1.9881 x 10⁻³ mg L⁻¹, and the limit of quantification was 6.0245 x 10⁻³ mg L⁻¹. The molar absorptivity was 9.4831 x 10⁴ L mol⁻¹ cm⁻¹. The proposed sensor membrane was used to measure Cu (II) in drinking water employing the internal standard addition method, with observed recoveries ranging from 98.63% to 100.29%. The copper levels in the drinking water samples tested in this study did not exceed the drinking water quality standards set by PERMENKES RI number 492/PER/IV/2010.
Decorating Cu2O with Copper Metal (Cu) through Facile Electrochemical Deposition for Methylene Blue Degradation Noureen Zahra, Shyla; Firgie Wulandari; Muhammad Raihan Rauf; Arum, Ayuningsih
Chemistry and Materials Vol. 3 No. 3 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i3.81

Abstract

A cuprous oxide (Cu2O) thin film was decorated with copper metal (Cu) using a simple electrochemical deposition method on a substrate of indium tin oxide at a potential of -0.3 V vs. Ag/AgCl and a temperature of 60 °C. This study aimed to investigate the role of Cu as a co-catalyst. The structure, phase, and morphology of Cu2O/Cu were characterized by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy, respectively. The electrocatalytic performance of Cu2O/Cu was recorded using linear sweep voltammetry and electrochemical impedance spectroscopy techniques. The X-ray diffraction and scanning electron micrograph show that Cu was successfully deposited covering Cu2O. The current density of Cu2O/Cu increased by 2.70 mA/cm2 confirming the lower charge current resistance of 2.48 kΩ. The Cu-decorated Cu2O demonstrated an improved photocatalytic activity, as shown by increased MB degradation from 46.33% to 50.87%. It was believed from characterizations that Cu deposition leads to more dense carriers and charge transfer, hence higher photocatalytic activity towards MB degradation than bare Cu2O thin film.
Electrodeposition of Thin Film Cu-Zn-Sn Alloy for Water Splitting Application Widakusuma, Reinardo Ramawijaya; Fathir Azzaki Iradata; Mokhamad Ali Rizqi Maulana; Ikhwan Nur Rahman
Chemistry and Materials Vol. 3 No. 3 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i3.82

Abstract

An energy transition to renewable energy sources is necessary due to the scarcity of fossil fuels and their detrimental effects on the environment. Water splitting process is one of the practical and effective way that does not occur spontaneously. This study investigates catalytic activity of Cu-Zn-Sn (CZT) photocatalyst in hydrogen evolution and oxygen evolution reaction. The CZT deposited with varied electrolyte’s pH of 6 and 9 on indium tin oxide substrate at the room temperature for 600 seconds. According to the X-ray diffraction patterns, there were Cu6Sn5, Cu5Zn8, and Sn metal phases with monoclinic, cubic, and cubic crystal systems. The scanning electron microscopy technique results of all CZT alloy sample showed a dense, non-uniform, and polycrystalline surface structure. The CZT alloys were found to have an average particle size of 0.35 μm. CZT alloys can produce a photocurrent density of 0.19 mA/cm² at a potential of 1.29 V vs RHE. the charge transfer resistance of CZT synthesized at pH 6 is lower (21.48 Ω) compared to pH 9 (28.36 Ω). The Tafel slope of HER for pH 9 CZT was -133 mV/dec, which was lower than that of pH 6 CZT (-88 mV/dec), indicating faster H2 production and corrosion resistance on pH 9 CZT.
Synthesis of Copper(I) Oxide Thin Film Through Potentiostatic Electrodeposition as an Antioxidant Film Muhammad Adya Raihan; Shirly Harissyah Alfiani; Sabrina Putri Chaerani; Rachmaniah Nurul Imani; Alsifa Andita Putri
Chemistry and Materials Vol. 3 No. 3 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i3.83

Abstract

Research on metal-based nanoparticles, such as silver, gold, and copper(I) oxide (Cu2O), has drawn considerable attention due to their potential applications in catalysis, antioxidants, antimicrobials, and anticancer fields. In this study, we successfully deposited Cu2O antioxidant films on indium tin oxide substrates through potentiostatic electrodeposition. The X-ray diffraction characterization revealed distinct peaks at 2θ value of 36.32°, 42.21°, and 61.30°, indicating the crystal structure of Cu2O thin film. The scanning electron microscopy image showed the three-sided pyramid morphology of Cu2O particles with average size of 316.18 nm. The energy dispersive X-ray spectrum confirmed the purity of the thin film, which is composed only of Cu and O elements without any impurities. The photoelectrochemical showed that the deposited Cu2O has a maximum photocurrent density of 8.37 mA/cm² under visible light irradiation and 1.40 mA/cm² without irradiation. In addition, this study also found that the highest inhibition values of DPPH (2,2-diphenyl-1-picrylhydrazyl) radicals were observed when ascorbic acid was added.
Additive-free Electrodeposition of SnCoNi Trimetallic Catalysts for Ethanol Electrooxidation Salsabila, Qori'atun Ni'mah; Fabian Glorious Kenaya; Muhammad Fathar Aulia; Muhammad Athariq
Chemistry and Materials Vol. 3 No. 3 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i3.84

Abstract

SnCoNi catalysts were synthesized via electrodeposition, with and without citric acid, to assess their ethanol electrooxidation performance. The additive-free catalyst exhibited superior properties, including lower charge transfer resistance and a smaller Tafel slope compared to the citric acid-modified catalyst. Chronoamperometry testing further revealed better electrochemical stability for the additive-free catalyst, with less current loss over time. Cyclic voltammetry confirmed the enhanced ethanol oxidation activity with a relatively high current density. The improved performance is attributed to better mass transport, active site exposure, and the synergistic effects of Sn, Co, and Ni in the additive-free catalyst, making it more efficient for ethanol electrooxidation. These findings suggest that the additive-free catalyst exhibits more favorable properties for ethanol electrooxidation compared to its citric acid-modified counterpart.
The Effect of Saccharin on SnNi Alloy: the Electrodeposition and its Electrocatalytic Activity in Ethanol Oxidation Reaction Mulmeyda, Rinda; Abdul Ghofur Sidik; Chika Shafa Maura; Abdul Asywalul Fazri
Chemistry and Materials Vol. 3 No. 3 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i3.85

Abstract

The development of Direct Ethanol Fuel Cell (DEFC) has attracted much attention, as alternative energy sources due to its various advantages. However, among its various advantages, DEFC has several problems, such as the kinetics of the ethanol oxidation reaction. Transition metal-based catalysts such as nickel and tin are considered as potential catalysts for DEFC due to their oxophilic properties that can improve catalytic activity. In this study, the effect of saccharin on SnNi bimetallic alloy catalyst synthesized by electrodeposition method on copper wire substrate was investigated. SnNi samples were characterized by several techniques, including X-ray diffraction, Scanning electron microscopy, and energi dispersive X-ray spectrocopy. Saccharin addition had a significant effect on the morphology, crystallite size, and composition of the catalyst. The presence of saccharin causes the formation of more uniform particles and has a smaller size. The sample with the addition of saccharin had a smaller charge transfer resistance value 4.82 Ω, lower tafel slope by 115 mV/dec, and show higher jf/jb ratio by 0.55.  Furthermore, as the current density decreases, the SnNi catalyst with saccharin has a slow decrease rate and higher stability than the SnNi catalyst without saccharin.
Effect of Mass and Contact Time of Coffee Grounds in Nickel Metal Ion Adsorption on Liquid Waste of Chemistry Laboratory Trinanda, Inez; Yussi Pratiwi; Tritiyatma Hadinugrahaningsih
Chemistry and Materials Vol. 4 No. 1 (2025)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v4i1.86

Abstract

Based on Indonesian Government Regulation PP No. 22 of 2021 concerning the implementation of environmental protection and management, the quality standard for nickel in waters is 0.05 mg/L. Nickel waste is very harmful to aquatic and terrestrial ecosystems and poses risks to human health. In this study, nickel waste was treated with coffee grounds using the adsorption method. The purpose of this study was to determine the effect of variations in the mass of coffee grounds and contact time on the adsorption of nickel metal in the liquid waste generated by the UNJ Chemistry laboratory. Coffee grounds are activated with NaOH 0.01 M to increase their adsorption ability. Two tests were conducted, namely, the variation of adsorbent mass and the variation of contact time. Based on the results of testing the variation of adsorbent mass and contact time, the highest percentage of removal was obtained at 91.70% at a mass of 0.05 g with a contact time of 15 minutes. The lowest percentage of removal was 39.56% in a mass of 1.5 g with a contact time of 90 minutes. This research provides a novel approach to heavy metal waste treatment especially nickel metal ion, which can be adapted to enhance waste treatment technologies in the future.
The effect of Phase Composition on the Photocatalytic Activity of Cu₂O/CuO/Cu Composites for Methylene Blue Photodegradation Rizqi Maulana, Mokhamad Ali; Aisyaturridha; Bimo TriGoutomo; Amir Mahmud
Chemistry and Materials Vol. 4 No. 1 (2025)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v4i1.87

Abstract

This study investigates the influence of phase composition on Cu₂O/CuO/Cu composites for the degradation methylene blue (MB) under visible light irradiation. Two types of composites, Cu₂O-rich and Cu₂O-poor, were successfully synthesized through electrodeposition method. The results showed that the Cu₂O-rich composite exhibited photocatalytic activity, as indicated by a maximum photocurrent of 13 mA/cm² and the highest optimized MB photodegradation efficiency. This enhanced performance is due to the high Cu₂O phase content, which generates a higher photocurrent density, thereby accelerating the redox reaction in the MB degradation.
PtSnNi Trimetallic and Their Catalytic Activities in Ethanol Electrooxidation Syafei, Hilman; Raudhatul Hadawiyah; Mulya Muhammad Nur
Chemistry and Materials Vol. 4 No. 1 (2025)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v4i1.90

Abstract

The declining availability of fossil fuels and their environmental impacts have driven the search for cleaner, renewable energy alternatives, such as direct ethanol fuel cells (DEFCs). However, the widespread application of DEFCs faces challenges due to the complex kinetics of ethanol electrooxidation, necessitating the development of effective catalysts. Platinum (Pt) is widely regarded as the most effective catalyst for this process. However, its use is hindered by high costs and susceptibility to poisoning by intermediates formed during the ethanol electrooxidation reaction. To address these issues, the addition of Sn and Ni to the Pt catalyst is expected to enhance its performance. In this study, PtSnNi trimetallics were synthesized using the electrodeposition method. The samples were then characterized using scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX) and electrochemical tests to evaluate their catalytic activity and stability. The SEM image reveals that PtSnNi2 has the smallest particle size compared to other PtSnNi samples. Additionally, the results indicate that PtSnNi2, with a composition of 73% Pt, 26% Sn, and 1% Ni, exhibits the optimal electrolyte concentration, leading to the highest catalytic activity and stability. This is evidenced by the lowest Rct, lowest Ib/If ratio, and highest current density in the ethanol oxidation reaction.

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