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INDONESIA
Indonesian Journal of Chemistry
Published by Universitas Gadjah Mada
ISSN : 14119420     EISSN : 24601578     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Indonesian Journal of Chemistry is an International, peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry including applied chemistry. The journal is accredited by The Ministry of Research, Technology and Higher Education (RISTEKDIKTI) No : 21/E/KPT/2018 (in First Rank) and indexed in Scopus since 2012. Since 2018 (Volume 18), Indonesian Journal of Chemistry publish four issues (numbers) annually (February, May, August and November).
Arjuna Subject : -
Articles 1,956 Documents
 184   185   186   187   188 
Solvent-Free Synthesis of Co-Based Zeolitic Imidazolate Framework (ZIF-9) for the Removal of Congo Red from Water Tran, Khoa Dang; Phan, Hoan Tuan; Nguyen, Chi Thi Kim; Nguyen, Bao Chi; Le, Ha Vu; Nguyen, Khoa Dang
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99141

Abstract

The study presented a green and benign approach via mechanochemistry for rapidly preparing a typical cobalt-based zeolitic imidazolate framework, namely ZIF-9. The structural, morphological and textural properties of the obtained material were confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and nitrogen sorption at 77 K. The prepared material was then employed as an efficient adsorbent to remove Congo red (CR) from the aqueous solution. Intensive experiments were then conducted with the removal of CR to investigate the effect of adsorption conditions, including contacting time, pH value, and initial concentration of organic dye solution. The adsorption process follows the pseudo-second-order kinetic model, indicating that the adsorption of the CR dye is primarily chemical adsorption. The Langmuir model fitted the experimental data with a maximum adsorption quantity of 248.22 mg/g. Besides, the adsorption capacity of prepared ZIF-9 still remained stable after three cycles. This strategy was a simple method compared to conventional methods in terms of reducing the amount of used solvents, energy requirements, and the duration of the synthetic process.
High Potential of Herbal Plant Extracts for Skin Protection from Ultraviolet Radiation Le, Tien Xuan; Dang, Phuong Yen; Tran, Uyen Khanh Nguyen; Nguyen, Nhu Quynh Trung; Tran, Thanh Truc
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99167

Abstract

This research is dedicated to exploring the photoprotective qualities of extracts from 10 different herbal plants to identify natural ultraviolet (UV) filtering agents suitable for use in cosmetics. The study pinpointed specific plant parts that showed promising photoprotective capabilities, including the fruits of Gardenia jasminoides L., the flowers of Chrysanthemum morifolium Ramat., as well as the leaves of Camellia sinensis L. and Moringa oleifera L. Among these, G. jasminoides extracts stood out for their superior photoprotection. Specifically, G. jasminoides led with an impressive in vitro SPF of 40.8 ± 0.2, with C. morifolium, C. sinensis, and M. oleifera trailing closely. Hence, the extracts were added to the base of the lotion cream to evaluate the stability and photoprotective activity. Additionally, even though natural extracts cannot completely replace conventional UV filters, they have substantially decreased the reliance on physical or chemical UV filters. Thus, this study provides a strong foundation for natural antioxidants' status and potential use for UV filtration.                                                                                                    
Development of Chemo-Selective Gas Sensors Based on Molecularly Imprinted Polymer-Quartz Crystal Microbalance for Detection of Bioactive Compounds in Curcuma longa Hardoyono, Fajar
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99285

Abstract

Turmeric contains bioactive compounds that are efficacious for human health. A breakthrough of simpler and lower-cost identification techniques is needed to utilize it. This paper aims to investigate the development of chemo-selective gas sensors for identifying α-curcumene, ar-turmerone, curlone, and β-sesquiphellandrene. Four chemo-selective sensors were created using quartz crystal microbalance (QCM) sensors coated with molecularly imprinted polymers to identify each of those compounds. The polymers were prepared using polyacrylic acid, hydrochloric acid, and pure target compounds (α-curcumene, ar-turmerone, curlone, and β-sesquiphellandrene). The turmeric odor from 10 different samples was exposed to QCM sensors. The changing frequency of QCM sensors due to the mass loading of target compounds on the surface of QCM sensors was recorded to analyze the performance of QCM sensors. The result of the principal component analysis showed that the QCM sensors performed well and could distinguish the turmeric samples at five combinations of the compounds. The turmeric sample classification using backpropagation neural networks reached high accuracies, with 97.04% in training and 98.73% in testing datasets. These findings indicate that the employment of sensory analysis using QCM sensors has the prospect of being a complementary technique for identifying bioactive compounds.
In Silico Investigation of γ-Sitosterol Isolated from the Ethanol Extract of Artocarpus camansi Leaves as a Sunscreen Agent Nasution, Rosnani; Azura, Rafna; Bahi, Muhammad; Maulydia, Nur Balqis; Bastian, Reza Akbar; Hilda, Michelia Mutiara; Marianne, Marianne
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99792

Abstract

The activity test of sunscreen lotion from the ethanolic extract of Artocarpus camansi leaves was carried out. The activity of sunscreen lotion as sun protecting factor (SPF) is ranging from 28.716 ± 0.1557 to 29.740 ± 0.1360, while the SPF of pure compound is 28.483 ± 0.1422. The type of lotion is water in oil (w/o) with viscosity and pH values in the range of 3057.1–5001.1 cP and 6.86–7.89, respectively. The viscosity and pH values obtained were following the standard SNI 16-4399-1996. The value of dispersion is in the range of 4.60–6.90 cm, while the value of adhesion is in the range of 14.55–25.03 s. The pure compound is thought to be γ-sitosterol by analysis of its molecular weight similarity and positive ion fragment m/z with a melting point of 147 °C. From the molecular docking, it is known that γ-sitosterol has the highest binding affinity value of −7.4 and −8.2 kcal/mol to human neutrophile collagenase (PDB ID: 1BZS) and fibroblast collagenase-1 (PDB ID: 966C), respectively. The presence of active compounds in the ethanolic extract of A. camansi lotion can support the activity of the SPF so that it can be used as a sunscreen formula. 
Enhanced Photocatalytic Activity and Magnetic Properties of CoFe2O4/TiO2-Ag/S for Visible Light-Driven Photodegradation of Methylene Blue Kunarti, Eko Sri; Agustiningsih, Dewi; Pambudi, Fajar Inggit; Syoufian, Akhmad; Santosa, Sri Juari
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.100142

Abstract

Environmental concerns drive the need for effective photocatalysts that can operate under visible light to degrade organic pollutants in wastewater. This study investigated TiO2-based photocatalyst doped with Ag and S to enhance its visible-light response, modified further with CoFe2O4 to introduce magnetic properties, resulting in a composite, CoFe2O4/TiO2-Ag/S. The synthesis was carried out by using cobalt nitrate hexahydrate and ferric nitrate nonahydrate for CoFe2O4 precursor, titanium tetraisopropoxide for TiO2 precursor, and silver nitrate with thiourea for Ag and S dopants. Results from characterization analyses, including FTIR, XRD, UV-vis, SEM-EDX, TEM, and VSM, confirmed the composite structure, with magnetic properties reflected in saturation magnetization of 10.69 emu g−1 and an extended UV-vis absorption edge indicating improved visible light activity. Photocatalytic tests for methylene blue degradation showed the highest performance (92%) with a 1:1 Ag:S ratio under visible light at pH 10 over 120 min, using 20 mg of catalyst in 5 ppm solution. Additionally, the composite demonstrated strong stability, retaining efficiency across six cycles of reuse.
Modification of Chitosan-Coated Magnetic Material with Glycidyl-trimethylammonium Chloride for Cr(VI) Adsorption Kamilia, Salwa; Mukhayani, Feri; Sutarno, Sutarno; Nuryono, Nuryono
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.100749

Abstract

Modification of chitosan-coated magnetic material with quaternary ammonium chloride as adsorbent for Cr(VI) anions has been studied. The works included magnetic material (MM) separation from iron sand, magnetic material-chitosan (MM/Chit) synthesis, and attachment of quaternary ammonium groups from glycidyl trimethyl ammonium chloride (GTMAC) on MM/Chit to produce MM/Chit/GTMAC with various mass ratios. Products were characterized with FTIR, XRD, SEM-EDX, and VSM. Adsorption studies were carried out in a batch system with pH, time, and initial Cr(VI) concentration variations. The unadsorbed Cr(VI) was analyzed with AAS, and the adsorbed Cr(VI) was calculated from the difference between initial and unadsorbed concentrations of Cr(VI). The results showed that MM/Chit/GTMAC was successfully synthesized, and adding GTMAC increased the stability of MM/Chit and shifted the optimum pH for Cr(VI) adsorption from 3.0 to 4.0. The study of kinetics and adsorption isotherm showed that the adsorption of Cr(VI) anion on the adsorbent MM/Chit/GTMAC (with the mass ratio of Chit to GTMAC 1:6) follows the pseudo-second-order kinetic model with the adsorption rate constant of 5.3 × 10−3 g mg−1 min−1 and Langmuir isotherms with the adsorption maximum capacity of 104.17 mg g−1, which has a potential to be applied for removing Cr(VI) from polluted wastewater.
Metal Oxide for Fast Adsorption System in the Methylene Blue Removal Ulfa, Maria; Oktaviani, Sukmaningrum Latifah; Mulyani, Bakti; Sholeha, Novia Amalia
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.92617

Abstract

Rapid adsorption systems utilizing metal oxide-based materials represent a promising technology to address adsorption challenges, particularly for the effective removal of methylene blue (MB). These systems enhance the continuous MB elimination process by leveraging metal oxide (MO)-based adsorbents with high accessibility and optimized adsorption conditions. The preparation process involves selecting metal oxides with high surface area and strong adsorbate affinity, ensuring efficient interaction with MB. Process parameters such as adsorbent dosage, contact time, temperature, pH, initial concentration, waste volume, and pressure are modified to develop a rapid and sustainable system for MB removal. This configuration enables efficient application in water treatment, achieving faster and more effective MB degradation. Moreover, the scalability of MO-based adsorbents ensures low-cost production and broad applicability, further supporting sustainable waste management. This review critically evaluates experimental findings from various studies on MO-based materials in rapid adsorption systems, highlighting their potential for large-scale implementation in wastewater treatment to mitigate environmental pollution.
Characterization of Zn-Doped MgTiO3 Powders Synthesized by Dissolved Metals Mixing Method Musyarofah, Musyarofah; Tanaka, Isao; Mohamed, Zakiah; Poo-arporn, Yingyot; Ernawati, Lusi; Yudoyono, Gatut; Prayitno, Budi
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.95879

Abstract

Zn-doped magnesium titanate powders with different Zn compositions, x = 0 to 1, were synthesized using the dissolved metals mixing method. The roles of calcination temperature and dopant Zn composition on powder morphology, phase composition, crystallite size, crystalline cell volume, and local environment were investigated through scanning electron microscope (SEM) observation, Rietveld analysis of powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and X-ray absorption spectroscopy (XAS) for Ti K-edge X-ray absorption near edge structures (XANES). We found that the geikielite solid solutions were formed during the pre-calcination at 400 °C for 1 h. Results show spherical particles (~1 µm) with minimal size variation across calcination temperatures (600–800 °C) and Zn compositions, though some agglomeration occurs. After calcination at 600 °C for 4 h, the crystalline cell volume of geikielite was proportional to the Zn composition, implying the formation of the solid solution in the range of Zn composition up to the level close to x = 1. This successful synthesis of the Zn-doped magnesium titanate nanocrystals at temperatures much lower than those required by the solid-state reaction method was thereby well demonstrated.
Enhanced UV Resistance of Poly(methyl methacrylate) Through Schiff Base and Metal Oxide Nanoparticle Incorporation Hussein, Ahmed; Yousif, Emad; Rasheed, Malath; Ahmed, Dina; Bufaroosha, Muna; Kadhom, Mohammed
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97173

Abstract

In this work, a novel poly(methyl methacrylate) (PMMA) material was prepared by incorporating Schiff base and metal oxide nanoparticles (NPs). Hence, different polymer derivatives were produced, and their resistance to light degradation was improved. PMMA was subjected to chemical modification, first by reacting PMMA with an excess of ethylene diamine to reduce the occurrence of cross-linking. Second, it underwent a reaction with the amino group of 4-methoxybenzaldehyde to produce Schiff base molecules. These molecules were subsequently infused with various metal oxide NPs, namely: TiO2, CuO, Cr2O3, Co2O3, and NiO to work as photostabilizers and prepare modified PMMA films. The synthesized polymers were analyzed using Fourier transform infrared (FTIR) and NMR spectroscopy to confirm their structures and determine the extent of structural alterations. FTIR and weight loss measurements assessed modified PMMA's UV stabilization. The effectiveness of functional groups was assessed by monitoring their growth. Additional analyses were done included atomic force microscopy (AFM), scanning electron microscopy (SEM), and microscopic imaging. Unmodified PMMA performed worse than Schiff base polymers. The modified PMMA photodegraded less than the blank films after 300 h of UV exposure. The unit's strong internal conjugation absorbs UV light, which improves performance.
Development of Graphene Oxide-Based Antibacterial Agents via ZnO/Eugenol Modification: Experimental and Computational Analysis Triatmaja, Karisma; Kunarti, Eko Sri; Suyanta, Suyanta; Widiakongko, Priyagung Dhemi
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97866

Abstract

The development of new antibacterial agents is proposed to solve the problem of drug-resistant bacterial strains caused by antibiotic misuse. The aim of this study was to improve the antibacterial activity by modifying graphene oxide (GO) using ZnO/eugenol and analyzing the interaction computationally. The study was started with GO synthesis using the modified Hummer method, followed by the dispersion of ZnO/eugenol through the mechanochemical method to GO to form GO/ZnO/eugenol composite. The composite was characterized using XRD, FTIR, UV-vis, SEM, and TEM. Results showed that the sonochemical method successfully prepared the GO/ZnO/eugenol composite. This material has better antibacterial E. coli activity than GO, with an inhibition zone of 11.5 mm in diameter, while pure GO showed no inhibition zone. MIC test presented that GO/ZnO/eugenol composite with 25 mg/mL suspension effectively prevented bacterial colony growth, while GO could only inhibit with 50 mg/mL suspension. Additionally, computational analysis through molecular docking suggested that the GO/ZnO/eugenol mechanism of action involves interference with DNA replication by hydrogenously interacting with the active site of DNA gyrase of E. coli bacteria. These findings highlight the potential of GO/ZnO/eugenol as a promising antibacterial agent for combating drug-resistant bacterial strains.

Page 186 of 196 | Total Record : 1956

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