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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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Synthesis and Characterization of Nanocube Cu2O Thin Film at Room Temperature for Methylene Blue Photodegradation Application Muhamad Athariq; Muhammad Raihan Rauf; Ikhfa Wiqoy Khairany; Intan Fadia Adani; Mega Gladiani Sutrisno
Chemistry and Materials Vol. 2 No. 3 (2023)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v2i3.65

Abstract

Methylene Blue is a synthetic dye with a complex structure thus making it hard to decompose naturally. Among the decomposition methods of synthetic dyes is photodegradation using a semiconductor material. In this study, Cu2O semiconductor nanoparticle has been synthesized on the surface of conductive substrate indium tin oxide using the electrodeposition method at room temperature. The X-ray diffractometer analysis provides information on the presence of Cu2O in the sample and the shape of the Cu2O crystal system which is a nanocube. Scanning electron microscopy with energy-dispersive X-ray spectroscopy provides distribution mapping information based on the morphology and atomic composition of the sample. Impedance measured a maximum resistance to charge transfer value of 2500 Ω. Photodegradation test towards methylene blue achieved a percent of degradation was 62.00% for 120 minutes under visible light irradiation with initial and final absorbance values of 1.56351 abs and 0.896875 abs respectively.
Enhancing Antioxidant Activity of Curcumin Using ZnO Nanoparticles Synthesized by Electrodeposition Method Nisrina Fitri Nur Syamsi fitri; Alsifa Andita Putri; Rachmaniah Nurul Imani; Suci Putriyaningsih; Devia Alventiana Sipayung; Anis Sakinah
Chemistry and Materials Vol. 2 No. 3 (2023)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v2i3.68

Abstract

The objective of this study was to fabricate zinc oxide (ZnO) nanoparticles through the utilization of the electrodeposition technique, to employ them as a supportive medium for enhancing the antioxidant properties of curcumin. The study involved the synthesis of ZnO nanoparticles, which were subsequently subjected to characterization using X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). Additionally, the antioxidant activity of the synthesized nanoparticles was assessed through the use of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. In XRD analysis, a notable peak denoted by an asterisk (*) is observed at specific angles of 2θ: 25.84°, 31.63°, 34.21°, and 36.12°, with corresponding index values (h, k, l) of (220), (100), (002), and (101), respectively. This peak is indicative of the degree of crystallinity exhibited by ZnO nanoparticles. The SEM data indicates that the particles generated possess a rod-like morphology, exhibiting a range of sizes. The Nyquist plots exhibit a semicircular arc pattern at low frequencies, as indicated by the findings from the EIS test. The data obtained from antioxidant assays indicated that ZnO-curcumin achieved an inhibition level of 47.09%, while curcumin alone showed a significantly lower inhibition percentage of 4.93%.
Synthesis of Modified Polyvinyl Pyrrolidone (PVP) Silver Nanoparticles Using Soursop (Annona muricata Linn) Leaf Extract and Its Application as a Heavy Metal Colorimetric Sensor Yussi Pratiwi; Rizky Amelia; Yusmaniar
Chemistry and Materials Vol. 3 No. 1 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i1.66

Abstract

This study aims to analyze the characteristics and performance of silver nanoparticles (AgNP) synthesized using soursop leaf extract bioreductor modified with the addition of polyvinyl pyrrolidone (PVP) stabilizer as a colorimetric sensor for heavy metal ions. The synthesis of silver nanoparticles was carried out by reducing AgNO3 using soursop leaf extract (Annona muricata Linn) bioreductor modified with the addition of PVP as stabilizer. The results showed that the optimum synthesis volume ratio of AgNP synthesis was 0.7 mL of soursop leaf extract: 10 mL AgNO3 with the addition of 3% PVP stabilizer. The formation of AgNP was characterized by a change in the color of the solution from yellow to brownish with a surface plasmon resonance peak at a maximum wavelength of 438 nm. Fourier-transform infrared spectroscopy studies showed hydroxyl groups (-OH) and carbonyl groups (C=O) play a role in the reduction process of silver ions. Particle size analysis results demonstrated an average particle size of 71.5 nm with a polydispersity index value of 0.364. The results of the colorimetric analysis showed that the synthesized AgNPs proved to be highly selective towards Cu metal ions.
Square-Wave Pulse Deposition of Pt Nanoparticles for Ethanol Electrooxidation Syafei, Devi Indrawati; Syafei, Hilman
Chemistry and Materials Vol. 3 No. 1 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i1.70

Abstract

Platinum (Pt) is often used as an electrocatalyst in the electrooxidation of ethanol. There have been many attempts to improve the catalytic properties of platinum-based catalysts to achieve satisfactory results. The solutions are manipulating the size and shape of Pt. In this study, Pt will be deposited using the square wave pulse deposition method at upper potential variations. The Pt samples were characterized by scanning electron microscopy (SEM), X-ray diffraction, energy dispersive X-ray, and electrochemical impedance spectroscopy. The results of SEM show that the morphology of Pt at potentials of 0.3 V, 0.5 V, and 1.0 V produces a dendritic nanothorn morphology, while 1.25 V and 1.50 V produce a nanoleaf morphology. The lowest charge transfer resistance value is at Pt1.0V with the smallest size. The highest yield of ethanol electrooxidation was at Pt1.0V reaching 8.82 mA/cm2.
Preparation of Liquid Soap Utilising Used Cooking Oil with Aloe Vera as an Antibacterial Agent Sukro Muhab; Zahra, Shyla Noureen; Revita Nurul Rafah; Vinka Juniaty Lestari; Nurhalizah; Fabian Glorious Kenaya; Abdul Asywalul Fazri; Tri Handayani Kurniati
Chemistry and Materials Vol. 3 No. 1 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i1.71

Abstract

Waste cooking oil has been repurposed in the preparation of liquid hand soap, enriched with Aloe vera extract as an antibacterial agent. To ensure the safety and efficacy of the product in bacterial inhibition, comprehensive testing of physical quality and antibacterial activity has been undertaken on the produced liquid soap. The test results affirm that the soap product complies with the Indonesian National Standard for free alkali content, acidity level (pH), foam height, foam stability, and water content. Notably, the soap exhibits a free alkali content of 0.01873%, a pH of 10, a foam height of 65 mm, and a foam stability value of 84.61%. The water content in the soap is measured at 40%. These results collectively position the soap within the criteria for high-quality soap. In the antibacterial effectiveness test against Staphylococcus aureus and Escherichia coli bacteria, the addition of Aloe vera has markedly expanded the inhibitory zone, demonstrating a significant enhancement in antibacterial activity. In light of the above, this study aims to address environmental pollution and health risks associated with improper disposal of waste cooking oil. Moreover, the addition of antibacterial Aloe vera presents an economically valuable solution by repurposing waste cooking oil into a useful product.
The The Effect of Electrodeposition Voltage on the Antioxidant Activity of Gold Nanoparticles Suliasih, Babay Asih; Sakinah, Anis; Marissa Angelina
Chemistry and Materials Vol. 3 No. 1 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i1.72

Abstract

Gold nanoparticles (AuNPs) are well known as free radical scavengers, which may induce cell damage, triggering degenerative diseases and premature aging. This research aims to assess the antioxidant activity of AuNPs synthesized via the electrodeposition method, employing cyclic voltammetry on a Fluorine-doped Tin Oxide (FTO) substrate. By varying the initial voltage, the resulting AuNPs exhibit  variations in both particle size and number. In this study, AuNPs demonstrated promising antioxidant potential, particularly at an initial voltage of -1 V, as evidenced by their ability to respond to DPPH radicals, yielding a percent inhibition of up to 36.80%.
Synthesis of AuPt Bimetal and its Catalytic Properties in Ethanol Electrooxidation Reaction Chika Shafa Maura; Mila Alawiyah; Sukro Muhab
Chemistry and Materials Vol. 3 No. 1 (2024)
Publisher : Pusat Inovasi Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56425/cma.v3i1.73

Abstract

AuPt Bimetal has been successfully synthesized by electrodeposition method with potentiostat technique. By varying the concentration of Au ions in the solution they are able to control the morphology and composition of the synthesized sample. The morphology obtained from the AuPt synthesis is cauliflower. The effect of Au ion concentration in solution on the catalytic performance of AuPt, the greater the Au concentration, the greater the current density in the electrooxidation reaction. In addition, the concentration of Au ions in the solution affects the results of the deposition of Au and Pt elements. In the study of AuPt nanocatalysts with a 0.4 mM Au ion concentration in an electrolyte solution, it was shown to have good catalytic activity in the ethanol electrooxidation reaction, with the resulting current densities and If/Ib of 10.1 mA/cm2 and 43.53 mA/cm2, respectively. This is an implication of many Au compositions which are known to have the ability to absorb and oxidize CO to encourage an increase in current density and increase its catalytic activity.
Square Wave Pulse Deposition of Gold Nanoparticles for Ethanol EOR Performance and Its Electrochemical Properties Investigation Mahmud, Amir; Tri Goutomo, Bimo
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.v3i2.75

Abstract

In this study, gold nanoparticles (Au NPs) were successfully synthesized using square wave pulse deposition. The synthesis process involved applying a lower potential of -0.1 V and an upper potential of 0 V for 25 minutes. Characterization of the synthesized Au NPs was conducted using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). The XRD analysis confirmed the formation of the Au phase on the FTO substrate. The SEM images revealed a nanopyramid-like morphology, with an average particle size ranging from 20 to 200 nm. The EIS measurements indicated low resistance values for the Au NPs. During the CV test for ethanol electrooxidation, a stable electric current of 4.28 mA/cm² was achieved, demonstrating good stability in the electrochemical process.
Utilization of Used Cooking Oil in Making Liquid Soap with the Addition of Water Hyacinth (Eichhornia crassipes) Leaf Extract as an Antibacterial Nababan, Bella Pricilya; Mulmeyda, Rinda; Insyani, Navisya Putri
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.v3i2.76

Abstract

The frequent disposal of used cooking oil into waterways, along with the proliferation of water hyacinth plants that become invasive in water bodies, contributes to environmental pollution and compromises ecosystem health. One of the effective solutions against various diseases is thorough handwashing with antibacterial soap to eliminate germs and dirt. Therefore, this study aims to investigate the impact of water hyacinth leaf extract addition on the antibacterial activity of cooking oil-based liquid soap. The research employs an experimental approach. Results from pH testing indicate that all liquid soap formulations produced meet the criteria for high-quality liquid soap. Among the variations tested, the formula containing 5% water hyacinth extract exhibited the best foam stability. Regarding antibacterial efficiency, the results suggest that all three samples exhibited weak inhibition of bacterial growth. However, the formula with 10% water hyacinth concentration showed the highest average inhibition zone of 3.46 mm.
Utilization of Plantain Peel (Musa sapientum) and Sweet Potato Starch (Ipomea batatas) Waste in Combination with Glycerol Addition to Produce Biodegradable Plastic Shafa Maura, Chika; Athariq, Muhamad; Mulmeyda, Rinda
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.v3i2.77

Abstract

Starch is a natural polymer derived from plants, known for its biodegradability, environmental friendliness, wide availability, and affordability. Glycerol, with its low molecular weight, serves as an effective plasticizer. Its addition enhances the physical and mechanical properties of plastics and provides protection against microbial degradation. This study aims to investigate the impact of glycerol addition on the mechanical properties of biodegradable plastics made from sweet potato starch and plantain peel waste. The research is an experimental to achieve this goal. The results indicated that all samples achieved 100% degradation, with elongation percentages ranging from 93.59% to 137.56%. The sample containing 10 grams of sweet potato starch and 5 grams of banana peel starch exhibited the lowest water absorption percentage at 73.43%. Additionally, the bioplastic sample consisting of 5 grams each of sweet potato starch and banana peel starch showed the highest thickness at 0.36 mm, meeting the established SNI standards. In conclusion, the mechanical properties, biodegradability, and transparency of bioplastics are influenced by variations in sweet potato starch and plantain peel starch composition, as well as by the addition of glycerol.

Page 4 of 6 | Total Record : 52

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