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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 25 Documents
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Search results for , issue "Vol 22, No 2 (2022)" : 25 Documents clear
Preparation of Iron-Doped SiO2/TiO2 Using Silica from Sugarcane Bagasse Ash for Visible Light Degradation of Congo Red Nawwal Hikmah; Dewi Agustiningsih; Nuryono Nuryono; Eko Sri Kunarti
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69501

Abstract

Iron(III)-doped SiO2/TiO2 composite (SiO2/TiO2-Fe) has been prepared from sugarcane bagasse ash for photocatalytic degradation of Congo Red. This research was initiated by preparing SiO2 from sugarcane bagasse ash through a sol-gel method. The SiO2/TiO2-Fe was obtained by mixing SiO2 gel with TiO2-Fe sol which was produced with titanium tetraisopropoxide (TTIP) as precursor and FeCl3·H2O as the dopant source. Dopant concentration was varied by 0, 1, 3, 5, 7% (w/w). The prepared materials were characterized by FT-IR, XRD, SR-UV, XRF, SAA, and SEM-EDX. The photocatalytic activity was evaluated for Congo Red degradation in a closed reactor under visible light illumination. The degradation yield was determined by the UV-Visible spectrophotometry method. Results showed that SiO2 was successfully extracted from bagasse ash with a silica content of 90.87%. The SiO2/TiO2-Fe composite was successfully prepared with the bandgap energy value (Eg) decreasing as the dopant concentration increased. The optimum Eg of 2.63 eV was obtained at the concentration of Fe was 5%. Under that condition, the SiO2/TiO2-Fe photocatalyst degraded Congo Red solution by 98.18 % under visible light at pH 3 with a mass of 30 mg for 90 min. The SiO2/TiO2-Fe composite is expected to be a photocatalyst material candidate for dye wastewater treatment.
Manufacture of Activated Carbon Adsorbents from Jackfruit Waste for Removal of Heavy Metals and Dyes from Wastewater: A Review Kim Ngan Thi Tran; Bich Ngoc Hoang; Kim Oanh Thi Nguyen; Hong Tham Thi Nguyen; Sy Chi Phung; Huong Tra Do; Cam Quyen Thi Ngo
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69538

Abstract

: Jackfruit is a fruit tree species distributed mainly in Southeast Asia and Brazil. The pulp and skin of jackfruit are widely used in various fields such as food, medicine, and interior decoration. However, the jackfruit processing into edible and usable products generates a large quantity of agricultural waste. In this review, we focused on summarizing the environmental applications of jackfruit waste in wastewater treatment. Specifically, the potential and application of activated carbon synthesized from jackfruit waste were assessed concerning the adsorption of organic dyes and metals from wastewater. In practical water treatment applications, the adsorption kinetic and isothermal models have been evaluated for activated carbon's suitability and adsorption capacity. This study acts as the basis for further development of the by-product materials to environmental treatment application and to reduce the negative impact of agricultural by-products on the environment.
Synthesis, Characterization, and Theoretical Study of Some New Organotellurium Compounds Derived from Camphor Nuha Hussain Al-Saadawy
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69805

Abstract

The present work describes the synthesis of a variety of organotellurium compounds. The first part describes the synthesis of a new series of organotellurium compounds containing azomethine groups. Reaction of (E)-(4-((1,7,7-trimethyl bicyclo[2.2.1]heptan-2-ylidene)amino)phenyl)mercury(II)chloride and (E)-(5-methyl-2-((1,7,7-trimethylbicyclo[2.2.1]heptan-2-ylidene)amino)phenyl) mercury(II)chloride with tellurium tetrabromide in 2:1 mole ratio yielded the tellurated Schiff bases Ar2TeBr2 (where Ar = 1-(C9H16C=N)C=N)C6H4 and 1-(C9H16C=N)C=N)-4-CH3C6H3) respectively. Reduction of organyl tellurium dibromide Ar2TeBr2 by hydrazine hydrate obtained the corresponding tellurides (i.e., Ar2Te) in good yields. Characterization of the prepared compounds was carried out using infrared spectrum (FT-IR), proton nuclear magnetic resonance spectrum (1H-NMR), and elemental analysis (CHN). The molecular structure of the organotellurium compounds was investigated using the density functional theory with hybrid functional (B3LYP), and the basis set 6-31G Geometrical structure, HOMO surfaces, LUMO surfaces, and energy gap have been produced throughout the geometry optimization. The molecular geometry and contours for the organotellurium compounds were investigated throughout the geometrical optimization. The donor and acceptor properties have been studied by comparing organotellurium compounds' highest occupied molecular orbital energies (HOMO). The present study aims to prepare organotellurium compounds derived from aniline, p-toluidine, and camphor and their derivatives using tellurated Schiff bases.
Sequential Microwave-Ultrasound Assisted Extraction of Flavonoid from Moringa oleifera: Product Characteristic, Antioxidant and Antibacterial Activity Aji Prasetyaningrum; Bakti Jos; Ratnawati Ratnawati; Nur Rokhati; Teguh Riyanto; Gian Restu Prinanda
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.65252

Abstract

Moringa oleifera leaves contain secondary metabolites in flavonoid compounds known to prevent several diseases. Therefore, appropriate extraction methods are required to produce extracts with a high yield of flavonoids from Moringa. In this study, the extraction from Moringa leaves was carried out using the sequential microwave/ultrasound-assisted extraction (MUAE) method compared with sequential ultrasound/microwave (UMAE), microwave (MAE), ultrasound (UAE), and maceration (ME). The effects of the time, temperature, and percentage of ethanol were studied on total flavonoid content using AlCl3 colorimetric assay. The extracts were analyzed by Scanning Electron Microscopy (SEM), Fourier Transforms Infrared Spectrophotometry (FTIR), and High-Performance Liquid Chromatography (HPLC). The antioxidant and antibacterial activities were tested using DPPH-scavenging and disc diffusion methods. The results of SEM surface analysis on various extraction methods show differences on each surface. The FTIR spectrum showed the presence of flavonoid O–H at 3200 cm–1, C=O at 1621 cm–1, and C–O at 1019 cm–1. In the results of HPLC, MUAE extracts 16.70 mg/ 100 g flavonoid quercetin at the retention time of 4.5 min, with the highest total flavonoids (2.89 mg QE/g), the highest antioxidant activity (IC50 72.31 µg/mL), and highest antibacterial activity (S. aureus 7 mm, E. coli 2 mm).
Fabrication of Alginate-Based Electrospun Nanofibers for Carbon Dioxide Removal Adhitasari Suratman; Desi Nur Astuti; Ryan Jonathan; Agus Kuncaka; Yusril Yusuf
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.67349

Abstract

A fabrication of eco-friendly and low-cost adsorbent materials is reported for CO2 removal. Alginate nanofibers (NFs) adsorbents were prepared by incorporating poly(vinyl alcohol) (PVA) into alginate solutions via electrospinning technique from alginate biopolymers. Smooth-surfaced Alg/PVA NFs were obtained with a specific surface area of 9.197 m2 g–1. Zeolite (Z) was impregnated into polymer solutions to enhance the properties and performances of alginate nanofibers. Alg/PVA/Z NFs appeared to be rougher with a specific surface area of 25.998 m2 g–1. Both adsorbents offered great potential for CO2 adsorbent in the future. The adsorption isotherms of Alg/PVA NFs followed the Langmuir model with optimum CO2 adsorption capacity of 3.286 mmol g–1 and  Alg/PVA/Z NFs followed Dubinin-Radushkevich model with optimum CO2 adsorption capacity of 10.710 mmol g–1.
Bioactive Compound Profile and Biological Modeling Reveals the Potential Role of Purified Methanolic Extract of Sweet Flag (Acorus calamus L.) in Inhibiting the Dengue Virus (DENV) NS3 Protease-Helicase Yuli Arif Tribudi; Ayu Tri Agustin; Dian Eka Setyaningtyas; Dwi Gusmalawati
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68317

Abstract

Dengue fever is an infectious disease caused by the dengue virus, and there is no yet effective drug to treat this disease successfully. Our study aimed to identify the bioactive compounds of Acorus calamus L. and its potential role in inhibiting dengue virus NS3 protease-helicase. Liquid Chromatography-Mass Spectrometry analyzed phytochemical constituents. Drug-likeness of the predominant compound methanol extract of Acorus calamus L. was investigated through the SWISS ADME server. Complex molecular interactions were investigated by Hex 8.0 docking program and Discovery studio 2016. Our study revealed that the five largest phytochemicals in the extract were acoric acid, acorone, acoradin, acoronene, and calamendiol. All predominant compounds are potent to be developed as drug candidates. Molecular docking results showed that the five compounds bind to the Arg599, Pro291, Lys388, Pro431, and His487 of the dengue virus NS3 protease-helicase, the ligand-binding site that plays an essential role in viral replication. The ligand-protein binding pattern exhibited hydrogen and hydrophobic interactions. The interaction of the acoradin-NS3 protease-helicase complex had the lowest binding energy of -299.7 kcal/mol. In summary, we conclude that Acorus calamus L. extract may have prospects as a drug for dengue virus infection.
Effect of Physicochemical Process Variables on Natural Indigo Dye Production from Strobilanthes cusia Leaves by Response Surface Methodology Edia Rahayuningsih; Wachid Siti Fatimah; Mukmin Sapto Pamungkas; Taranipa Marfitania
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68335

Abstract

The recovery process of indigoid compounds involves enzymatic hydrolysis of indigo precursors continued by oxidation reaction to synthesize indigo pigment. The purpose of this research was to evaluate the effect of physicochemical process variables, i.e., temperature, time, and pH aeration, on indigo yield from Strobilanthes cusia leaves. Small leaf pieces were immersed in distilled water and heated at temperatures (40, 50, and 60 °C) and duration (1, 2, and 3 h). The extract was aerated at different pHs (8, 10, and 12) to form the indigo product. The indigo concentration was quantified through a visible spectrophotometer and high-performance liquid chromatography (HPLC). The optimized condition for indigo production was studied using response surface methodology (RSM). Temperature, time, and interaction between temperature and time significantly affected the indigo yield. The optimized conditions for extraction of indigo dyes were determined to be at 60 °C for 1 h and pH 8 for maximizing the indigo yield. On that condition, the indigo concentration quantified by HPLC was 1.15% (w/v) which was lower than that by the spectrophotometry. By spectrophotometric analysis, the actual indigo content of 1.68% (w/v) on that optimum condition was close to the predicted indigo content of 1.77% (w/v) using RSM.
Metabolite Profiling of Ebony (Diospyros celebica Bakh) Leaves and Wood Extracts Using LC-MS/MS Dien Atin Boritnaban; Alfi Hudatul Karomah; Dewi Anggraini Septaningsih; Muhammad Majiidu; Fifi Gus Dwiyanti; Iskandar Zulkarnaen Siregar; Mohamad Rafi
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68529

Abstract

Ebony (Diospyros celebica Bakh) is an endemic forest tree species found in Sulawesi whose basic information on its metabolite profile is still lacking. The objective of this research was to separate and identify putatively metabolite present in the leaves and wood of ebony across Sulawesi. Separation and identification of ebony metabolites were carried out using UHPLC-Q-Orbitrap HRMS analysis. Using ultrasonication with ethanol as the extracting solvent, we used powdered ebony leaves and wood. The results showed that the metabolites contained in the leaves and wood of ebony were 59 metabolites. About 14 compounds were found in the leaves and wood, 21 compounds in the wood, and 24 compounds in the leaves. The identified metabolites are flavonoids, terpenoids, amino aldehydes, alkaloids, quinones, steroids, amino acids, fatty acids, and saccharides. Clustering of ebony using principal component analysis obtained leaves and wood groups using peak area of known compounds as the variable.
Selecting Suitable Functionals and Basis Sets on the Study Structural and Adsorption of Urea-Kaolinite System Using Cluster Method Nur Najwa-Alyani Mohd Nabil; Lee Sin Ang
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68599

Abstract

Kaolinite is an essential mineral with numerous applications across many sectors. One of them is in the agricultural industry, in which it is a crucial component in the method of controlled-release fertilizer. This manuscript reports the use of different functionals and basis sets on the structural and electronic properties of kaolinite's surface, intending to find reliable methods among those tested. Four different functionals, B3LYP, CAM-B3LYP, M06-2X, TPSSTPSS, complemented with various basis sets, were used in this study. The results show that TPSSTPSS complement with 6-311G** provides good agreement with previous research and experimental results among different functionals and basis sets used. The quantitative analysis was done to optimize the kaolinite molecule. Selected extrema points were used to place the urea molecule for the interaction of urea-kaolinite studies. The urea's interaction with kaolinite was reported at a different interaction site in the gas phase and different orientations of the urea molecule. Urea molecule was optimized above the Al–O and Si–O surfaces with their energy difference calculated. Our results showed that both surfaces act as promising adsorbents among the different orientations of the urea on both the Al–O and Si–O surfaces. However, Al–O, and Si–O had another preferable interaction site to the urea molecules.
Silicon Carbide/Polysilazane Composite: Effect of Temperature on the Densification, Phase, and Microstructure Evolution Fiqhi Fauzi; Alfian Noviyanto; Pipit Fitriani; Amirudin Wibowo; Toto Sudiro; Didik Aryanto; Nurul Taufiqu Rochman
Indonesian Journal of Chemistry Vol 22, No 2 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.69118

Abstract

This paper reports a route to suppress the grain growth in silicon carbide (SiC) during its sintering by combining it with polysilazane (PSZ). SiC was mixed with PSZ in a 1:1 weight ratio and sintered at 1600, 1700, and 1800 °C in a hot-pressing furnace. A satisfactory density was obtained at sintering temperatures > 1600 °C. The grain sizes of the SiC/PSZ composites sintered at 1700 and 1800 °C were 112 and 125 nm, respectively. The grain shape of the SiC/PSZ composite sintered at 1700 °C was circular and mainly similar to the initial shape of the SiC powder. Grain shape accommodation was observed at a sintering temperature of 1800 °C. It is suggested that different sample shapes were affected by different liquid phase formations. Silicon oxynitride (Si2N2O) was formed and played an important role in densification and microstructure generation.

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