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Communications in Science and Technology
Published by Komunitas Ilmuwan dan Profesional Muslim Indonesia
ISSN : 25029258     EISSN : 25029266     DOI : -
Core Subject : Engineering,
Engineering
Communication in Science and Technology [p-ISSN 2502-9258 | e-ISSN 2502-9266] is an international open access journal devoted to various disciplines including social science, natural science, medicine, technology and engineering. CST publishes research articles, reviews and letters in all areas of aforementioned disciplines. The journal aims to provide comprehensive source of information on recent developments in the field. The emphasis will be on publishing quality articles rapidly and making them freely available to researchers worldwide. All articles will be indexed by Google Scholar, DOAJ, PubMed, Google Metric, Ebsco and also to be indexed by Scopus and Thomson Reuters in the near future therefore providing the maximum exposure to the articles. The journal will be important reading for scientists and researchers who wish to keep up with the latest developments in the field.
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Articles 25 Documents
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Search results for , issue "Vol 10 No 1 (2025)" : 25 Documents clear
Biosynthesis of sulfur and selenium co-doped ZnO nanoparticles for the enhanced photocatalytic treatment of industrial wastewater Sulistyo Rini, Ari; Sitorus, Afrida Helena; Rati, Yolanda; Taer, Erman; Usman, Zulkarnain; Jasril; Umar, Akrajas Ali
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1539

Abstract

Although ZnO photocatalysts show potential for wastewater treatment, their low efficiency limits the commercialization. To address this problem, we investigated the effect of co-doping ZnO with selenium (4%, fixed) and sulfur (0.5, 1, and 1.5 wt%). The catalysts were synthesized using Matoa leaf extract and zinc nitrate hexahydrate while being subjected to 540 W microwave irradiation. UV-Vis analysis revealed absorption peaks at 340-398 nm with sulfur doping increasing the band gap. XRD confirmed the preservation of the hexagonal wurtzite structure, while FESEM images showed a morphological transformation from nanoflowers to petal flakes with increasing sulfur content. EDX analysis confirmed the presence of S, Se, Zn, and O, while FTIR analysis identified OH groups from the extract in the nanoparticles. BET surface area was found to progressively reduced from 24.58 to 16.86 m²/g with sulfur doping. The co-doped catalyst with 0.5 wt% sulfur (0.5S(4Se-ZnO)) demonstrated the highest degradation of 4-nitrophenol at 99.69%, indicating its applicability in industrial wastewater treatment. These findings indicate that the Se/S co-doped ZnO, prepared via a green synthesis route, holds a strong promise as an efficient and practical photocatalyst for addressing environmental pollution in a sustainable and economical manner.
Rotating speed and magnetic pole dependency assisted on copper deposition onto aluminum alloy substrate for bacterial eradication application Basori, Basori; Ruliyanta; Ajiriyanto, Maman Kartaman; Kriswarini, Rosika; Hardiyanti, Heri; Rosyidan, Cahaya; Yudanto, Sigit Dwi; Situmorang, Evi Ulina Margaretha; Edbert, Daniel; Nanto, Dwi; Susetyo, Ferry Budhi
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1547

Abstract

Copper (Cu) is widely used in many sectors, such as drinking water piping, heat exchangers, and medical equipment. The present research conducted an electrodeposition of Cu over an aluminum (Al) alloy substrate under the influence of various magnetic poles and rotating speeds. In the present study, a number of investigations, including deposition rate, current efficiency, coating thickness, surface morphology and phase, crystallographic orientation, antibacterial activity, electrochemical behavior, and hardness test were conducted. Increasing the rotation speed promoted to enhanced deposition rate and current efficiency for both magnetic poles influence. An increase in the deposition rate from 12.83 to 13.67 µm/h led to the increasing thickness, a change in surface morphology near the spheroidal, becoming a faceted structure. Presenting and rising in the rotation of a magnetic field led to a reduced surface roughness and crystallite size of Cu film for both magnetic poles influence. The Cu film made without spinning magnetic had a characteristic of highest bacterial inhibition zone around 2.50 ±0.56 cm². The CuRN50 sample had the lowest corrosion rate at around 0.055 mmpy, while the CuRS100 sample had the highest hardness value at approximately 80.72 HV for having the lowest crystallite size. Cu coated onto Al alloy could enhance its properties, such as being antimicrobial, being resistant against corrosion and having the hardness value.
Cobalt-nickel supported on desilicated HZSM-5 for the conversion of Reutealis trisperma (blanco) airy shaw oil to liquid hydrocarbon products Marlinda, Lenny; Rahmi; Aziz, Abdul; Roesyadi, Achmad; Hari Prajitno, Danawati; Mirzayanti, Yustia Wulandari; Al-Muttaqii, Muhammad
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1570

Abstract

Desilication/alkaline treatment and metal impregnation were used to create the HZSM-5 catalyst supported by Co-Ni. These catalysts' isotherm patterns combined type I and type IV isotherms. This isotherm pattern showed a hysteresis loop at comparatively higher pressures. The pore size distribution of the mesoporous HZSM-5 catalysts was situated between 6 and 12 nm in size. Its use in the hydrocracking of Reutealis trisperma (Blanco) airy shaw oil (RTO) to produce biofuel was investigated. The results of the catalytic test showed that the hydrocarbon makeup of the biofuel was comparable to that of fuel. In comparison to HZSM-5, the mesoporous Co-Ni/HZSM-5 catalyst enhanced n-paraffin by 46.32 area% and aromatic by 34.18 area% in the hydrocracking of RTO.
Synergetic effect of ZnO/NiO nanocomposite on the enhancement of photocatalytic degradation efficiency of dyes molecules Iasya, Yurin Karunia Apsha Albaina; Khoerunnisa, Fitri; Dwi, Sadina Sahitya; Putri, Restiani Alia; Nurhayati, Mita; Arrozi , Ubed Sonai Fahruddin; Permana, Yessi; Handayani, Murni; Astuti, Wijayanti Dwi; Da, Oh Wen; Irnanda, Istifhamy
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1583

Abstract

The discharge of organic dyes into water systems poses severe risks to human health and aquatic ecosystems. A remarkable technique that is increasingly recognized for dyes degradation is photocatalysis. This work aims to investigate the role of zinc oxide/nickel oxide (ZnO/NiO) nanocomposites in enhancing photocatalytic degradation efficiency of dyes molecules. The nanocomposites were prepared using a simple ultrasonication technique and analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The XRD pattern of the ZnO/NiO nanocomposites exhibited characteristic peaks aligned with the ZnO and NiO phases, referring to JCPDS standards. The SEM images of nanocomposites featured the rod and irregular flake-like structures with the average size of 80 nm. The nanocomposites showed the highest dye photodegradation efficiency (RB 93.65% and MO 94.82%) in view of a larger semicircular diameter and lowest band gap energy as verified by Nyquist plot and DFT calculation. These results emphasized the synergistic effect of ZnO/NiO nanocomposites in promoting dye photocatalytic degradation.
Formation and stability investigation of meso-hydroxy diacyl-dipyrromethane Ferryansyah, Mohammad Akbar; Santria, Anas; Ishikawa, Naoto; Firmansyah, Dikhi
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1593

Abstract

The oxidation of dipyrromethane by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) generally produces dipyrrin, but in the presence of trace water, a meso-hydroxy dipyrromethane can be formed. To investigate this unusual product, we then studied meso-hydroxy bis(p-anisoyl)-p-fluorophenyl dipyrromethane (3) obtained from the oxidation of bis(p-anisoyl)-p-fluorophenyl dipyrromethane (2). Spectroscopic studies (1H-NMR, UV-Vis, and fluorescence), mass spectrometry, and computational analyses were performed to investigate this mechanism. Zinc complexation of compound 3 altered the 1H-NMR spectrum and shifted the absorption peak from 325 nm to 567 nm with “turn-on” fluorescence. Thermochemical studies have indicated that the formation of meso-hydroxy requires energy higher than dipyrrin. This study suggests that the electronic properties of meso-aryl and acyl groups are the key factors for the nucleophilic attack of water on cationic dipyrromethane intermediate. These results further improve the understanding of dipyrromethane oxidation pathways, which is crucial for the design and synthesis of dipyrrin-chemosensors.
Evaluating the effectiveness of facial actions features for the early detection of driver drowsiness in driving safety monitoring system Rahmawati, Yenny; Woraratpanya, Kuntpong; Ardiyanto, Igi; Adi Nugroho, Hanung
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1594

Abstract

Traffic accidents caused by drowsiness continue to pose a serious threat to road safety. Many of these accidents can be prevented by alerting drivers when they begin to feel sleepy. This research introduces a non-invasive system for detecting driver drowsiness based on visual features extracted from videos captured by a dashboard-mounted camera. The proposed system utilizes facial landmark points and a facial mesh detector to identify key areas where the mouth aspect ratio, eye aspect ratio, and head pose are analyzed. These features are then fed into three different classification models: 1D-CNN, LSTM, and BiLSTM. The system’s performance was evaluated by comparing the use of these features as indicators of driver drowsiness. The results show that combining all three facial features is more effective in detecting drowsiness than using one or two features alone. The detection accuracy reached 0.99 across all tested models.
Kinetic study of bioactive compound extraction from cacao shell waste by conventional and deep eutectic solvent Irsal, Muh.; Kusumastuti, Yuni; Ariyanto, Teguh; Putri, Nur Rofiqoh Eviana
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1606

Abstract

Cacao shells contain bioactive compounds such as phenolic acids and flavonoids. This study investigated the potential of bioactive compound extraction in cacao shells using conventional and green solvents like deep eutectic solvent (DES) (choline chloride: lactic acid). Specifically, it investigated the extraction kinetic models and parameters, which are critical to scale up the extraction process. The extraction of cacao shell was conducted using various conventional solvents (ethanol, methanol, n-hexane, and water) and DES (100 % and 70%) in which the result showed that DES 100% had the highest total phenolic content of 337.92?±?9.55 mg GAE/g dry weight. Meanwhile, pseudo-second order and Peleg’s model provided the best fit for the experimental data with higher R2 values. DES 70% showed a higher total flavonoid content of 76.51?±?1.59 mg RE/g dry weight. FT-IR and Raman spectroscopy confirmed the presence of bioactive compounds in DES-based extracts, which revealed characteristic vibrational bands associated with polyphenolic structures. These include bands corresponding to hydroxyl (–OH), carbonyl (C=O), and aromatic C=C stretching—functional groups commonly found in quercetin and other bioactive compounds.
Effect of ratio Pluronic P123 and gelatin on titania as a catalyst in methylene blue degradation Ulfa, Maria; Pangestuti, Indriyani
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1614

Abstract

This study explores the influence of the gelatin-to-Pluronic P123 molar ratio on the synthesis, structural properties, and photocatalytic performance of titania for methylene blue degradation. Gelatin, employed as a biotemplate alongside Pluronic P123, effectively modulates the physicochemical characteristics of titania. As the gelatin content increases, significant changes are observed in oxygen incorporation, pore morphology, and crystallinity. Energy-dispersive X-ray spectroscopy (EDX) reveals a progressive increase in surface oxygen content from 10% (T-Gl) to 29% (T-Gh), indicating strong interactions between gelatin’s NH? groups and titanium species. FTIR analysis confirms enhanced Ti–O–Ti bonding, with peak transmittance intensities reaching 79.857% in T-Gh. Nitrogen adsorption-desorption measurements verify mesoporosity across all samples, with pore diameters ranging from 12.4 nm to 14.8 nm and surface areas from 27.69 to 31.67 m²/g. Crystallite sizes, determined by XRD, range between 4.27 nm and 8.56 nm, while the crystallinity varies from 45.81% to 54.55%. Despite having a lower surface area, T-Gm exhibits excellent photocatalytic efficiency (90.23%) due to favorable pore and crystallite characteristics. T-Gh demonstrates the highest performance (92.90%), attributed to its oxygen-rich surface, moderate crystallinity, and balanced mesoporous framework that enhances charge separation and dye adsorption. These findings underscore the critical role of gelatin-to-P123 ratio control in tailoring structural and surface functionalities of titania, thereby offering a sustainable strategy for designing efficient photocatalysts for environmental remediation. The developed biotemplated synthesis approach not only enhances photocatalytic performance but also promotes the use of eco-friendly and cost-effective materials, making it highly beneficial for scalable applications in wastewater treatment.
Biochar supported photocatalyst (mangrove biochar-TiO2) for organic pollutants removal via synergetic adsorption-photocatalytic process Azizah, Nadya Ummi; Ariyanti, Dessy; Lesdantina, Dina; Saputra, Erwan Adi; Srivastava, Vimal Chandra
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1619

Abstract

Access to clean water remains a global challenge, which is made worse by the contamination of chemical dyes. The recent innovations of wastewater treatment have been introduced, such as combined biochar with TiO2 photocatalyst. This study proposed to degrade mainly organic pollutants from dyed wastewater using adsorption-photocatalytic of biochar-supported photocatalyst TiO2 (BSP). Mangroves were converted into biochar via hydrothermal carbonization process and combined with TiO2 by a sol-gel method. The composite was then characterized by SEM-EDX, FTIR, and XRD. The degradation performance of the BSPs was optimized with the addition of Titanium (IV) Isopropoxide (TTIP) solution in biochar for 15-25 mL, solution photocatalyst dosage 0.5–1 g/L, initial dyed water concentration at 10 ppm, pH 5.2, and UV-irradiation time from 30 to 240 min in a photocatalytic reactor. The phenomenon of organic pollutants removal was observed based upon the mechanism and dominance of the process and the degradation reaction rate of organic pollutants in dyed wastewater. Methylene blue used as a model dye was degraded 100% through the adsorption-photocatalysis process using BSP. The highest effective degradation performance was found in BSP 20 that had a functional group area of 4.39923 m²/g, a catalyst loading of 0.5 g/L, and the highest degradation rate at k = 0.021 min?¹. In subsequent development, the synergistic interaction between biochar and TiO2 presents a promising avenue for the development of advanced wastewater treatment systems targeting the removal of organic pollutants, particularly in textile industry.
Optimizing ground control points for UAV photogrammetry: A case study in slope stability mapping Ridha, Muhammad Hafizhir; Arifin, Yulian Firmana; Abdi, Ari Surya
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1627

Abstract

This study investigated the effect of Ground Control Point (GCP) distribution on the accuracy of UAV-based slope mapping and stability analysis. Three GCP configurations—top-only, vertical, and diagonal—were tested. Accuracy was evaluated using UAV photogrammetry and compared to GPS geodetic data. The vertical GCP setup produced the highest accuracy, reducing total RMSE by 89.6% (from 52.93 mm to 5.50 mm). The diagonal configuration, while being slightly less accurate (61.26 mm RMSE), improved spatial coverage. Slope stability analysis using the finite element method (FEM) confirmed the reliability of the vertical setup for slope assessment. These results demonstrated that optimizing GCP layout could significantly improve model precision while reducing fieldwork. This work contributes to efficient and accurate slope monitoring with fewer GCPs, making it suitable for large-scale geotechnical applications. Future research will focus on applying these configurations to vegetated and more complex terrains and integrating automation for broader and scalable implementation.

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