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All Journal VALENSI Cerdika: Jurnal Ilmiah Indonesia Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Sains Materi Indonesia
Siti Nurbayti
Program Studi Kimia Fakultas Sains dan Teknologi Universitas Islam Negeri Syarif Hidayatullah Jakarta
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Public Health Social Sciences

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Sonochemical Assisted Synthesis of Cr-PTC Metal Organic Framework, ZnO, and Fe3O4 Composite and Their Photocatalytic Activity in Methylene Blue Degradation Nurbayti, Siti; Adawiah, Adawiah; Bale, Uly Fitria; Fadhilla, Rizka; Ramadhan, Fitri Nur; Zulys, Agustino; Sukandar, Dede; Saridewi, Nanda; Tulhusna, Latifah
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 2 Year 2024 (August 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20156

Abstract

Methylene blue pollutants can be treated by photocatalytic methods using metal oxide-based semiconductor materials and metal organic framework (MOF). These two materials are often coupled into a composite to improve their physicochemical properties and catalytic activity. This research focuses on the synthesis of composites based on Cr-PTC MOF, ZnO, and Fe3O4 by the sonochemical method. The obtained composites were characterized and tested for catalytic activity in methylene blue pollutant degradation in an aqueous system under acidic conditions (pH = 5). Our investigation shows that the Cr-PTC@Fe3O4 composite possesses the lowest band gap energy of 1.86 eV and achieves the highest photocatalytic activity in methylene blue degradation at solution pH = 5, with a percent degradation of 84.36%. The sonochemical incorporation of Fe3O4 and Cr-PTC MOF is able to fabricate materials in a short time with better photocatalytic activity in degrading methylene blue than the single materials. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Comparison of Maceration and Soxhletation Methods on the Antioxidant Activity of the Bouea macrophylla Griff Plant Rudiana, Tarso; Nurbayti, Siti; Ashari, Tiara Hadi; Zhorif, Sherina Arestia; Suryani, Nani
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 2, November 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i2.35239

Abstract

The impact of extraction methods on the potency of plant extracts is crucial. Bouea macrophylla Griff., a tropical fruit plant rich in phenolic and flavonoid compounds, exhibits strong antioxidant activity. This study aimed to evaluate the effect of maceration and soxhletation extraction techniques on B. macrophylla plants on antioxidant activity in vitro using the method of inhibiting DPPH radical compounds. Ethyl acetate and ethanol solvents were utilized to macerate and soxhlet all parts of the plant. Subsequently, each extract was subjected to quantitative analysis for antioxidant activity, total phenolic, and flavonoid content through UV-Vis spectrophotometry. Quantitative analysis revealed substantial antioxidant activity and notable levels of total phenolic and flavonoid content across all plant parts. The result indicated that although both maceration and soxhletation showed a significant impact on yield (p=0.009) and total flavonoids (p=0.038), significant differences in antioxidant activity (p=0.409) or total phenolics (p=0.874) within the plant extracts of B. macrophylla were not observed at a significance level of 5%.
Natural Zeolite as Mo and MoP Catalysts Support for Catalytic Deoxygenation of Jatropha Oil Aziz, Isalmi; Farhan, Muhammad; Saridewi, Nanda; Azizah, Yulyani Nur; Muawanah, Anna; Nurbayti, Siti; Dwiatmoko, Adid Adep; Adhani, Lisa
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.45272

Abstract

Non-edible oil, such as Jatropha oil, is an interesting feedstock for the development of renewable diesel (green diesel). Catalytic deoxygenation using natural zeolite-supported Mo-based catalysts is a promising process for the conversion of Jatropha oil to green diesel. Mo and MoP catalysts supported on natural zeolite were synthesized by wet impregnation at a concentration of 5% (w/w). The catalysts were characterized by XRD, XRF, SAA and NH3-TPD. The catalysts were successfully synthesized with the appearance of Mo and MoP peaks on the catalyst diffractogram. XRF results also showed that Mo and P were present in the catalyst. Metal impregnation decreased the surface area and pore volume of the catalyst, but increased the average pore diameter. The NH3-TPD profile of the catalyst showed that the weak acid sites of both catalysts were larger than the strong acid sites. Based on the activity test of catalytic deoxygenation of Jatropha oil, the MoP/HZ catalyst produced a higher conversion (67%) and liquid product yield (79%) than Mo/HZ. This is associated with a larger pore diameter, so that the distribution of reactants on the catalyst surface is more optimal. However, the highest green diesel selectivity of 82% is produced by the Mo/HZ catalyst. The Mo/HZ catalyst is more oriented towards the HDO reaction, whereas the MoP/HZ catalyst is more oriented towards the DCO/DCO2 reaction.
Peran Kuliah Kerja Nyata (KKN) dalam Pengabdian dan Pemberdayaan Masyarakat Desa Kedungdawa, Kabupaten Cirebon Amellia, Amellia; Tamamala, Ananda Farhan; Taryono, Taryono; Nurbayti, Siti; Yasir, Hilmi Naufal
Cerdika: Jurnal Ilmiah Indonesia Vol. 5 No. 10 (2025): Cerdika: Jurnal Ilmiah Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/cerdika.v5i10.2862

Abstract

Kuliah Kerja Nyata (KKN) merupakan salah satu wujud implementasi Tri Dharma Perguruan Tinggi, khususnya dalam bidang pengabdian kepada masyarakat. Kegiatan KKN Kelompok 51 Universitas Swadaya Gunung Jati yang dilaksanakan di Desa Kedungdawa, Kecamatan Kedawung, Kabupaten Cirebon, difokuskan pada dua bidang utama, yaitu pemberdayaan ekonomi masyarakat dan pelestarian lingkungan. Metode yang digunakan adalah pendampingan, sosialisasi, praktik langsung, serta kolaborasi dengan pemerintah desa dan komunitas lokal. Program yang dijalankan mencakup pendampingan UMKM melalui digitalisasi pemasaran (pembuatan merchant QRIS, pembuatan banner, dan e-commerce), edukasi lingkungan dengan mengolah sampah plastik menjadi paving block kepada masyarakat dan perangkat desa, serta pelatihan hidroponik kepada ibu PKK dan siswa sekolah dasar. Selain itu, dilakukan pula edukasi literasi dasar di lingkup sekolah, pendampingan penginputan data SDGs desa, dan dukungan pada program kolaboratif desa digital. Hasil kegiatan menunjukkan adanya peningkatan kesadaran masyarakat terhadap pentingnya pengelolaan lingkungan berkelanjutan, meningkatnya kapasitas pelaku UMKM dalam memanfaatkan teknologi digital, serta terbangunnya jejaring kolaborasi antara mahasiswa, pemerintah desa, dan warga. Dengan demikian, KKN tidak hanya berfungsi sebagai media pembelajaran mahasiswa, tetapi juga sebagai katalis perubahan sosial dan ekonomi di Desa Kedungdawa.
Utilization of Potassium Carbonate-Ethylene Glycol as Deep Eutectic Solvent to Delignification Oil Palm Empty Fruit Bunch for Furfural and Ethanol Production Muryanto; Amelia, Fanny; Nurbayti, Siti; Sudiyani, Yanni; Gozan, Misri
Jurnal Sains Materi Indonesia Vol. 25 No. 2 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.1260

Abstract

Pretreatment using Deep Eutectic Solvent (DES) was done to reduce the lignin content in oil palm empty fruit bunch (OPEFB). DES solution was prepared by combining Potassium Carbonate (K2CO3) as hydrogen bond acceptors (HBA) and Ethylene Glycol (EG) as hydrogen bond donors (HBD). This study aimed to obtain optimum conditions in the pretreatment process and determine the levels of lignin, cellulose, hemicellulose, and glucose in OPEFB. The pretreatment stage was performed at different temperature parameters, 100, 120, and 150°C, for 60 minutes to produce optimum conditions. Biomass pretreated with DES was hydrolyzed by cellulase complex to obtain glycose and xylose. The results showed that the pretreatment optimum condition value achieved with DES K2CO3:EG (1:10) at 150°C for 60 minutes was able to degrade lignin by 46,06%, hemicellulose by 4,08%, increase cellulose by 60,21%. The glucose and xylose content reached 58.48 g/l and 26.60 g/l, respectively. This sugar has potential for ethanol production from glucose and furfural production from xylose.
Co-Authors adawiah adawiah, adawiah Agustino Zulys Amelia, Fanny Amellia Amellia Anna Muawanah Ashari, Tiara Hadi Bale, Uly Fitria Dede Sukandar Dwiatmoko, Adid Adep Fadhilla, Rizka Isalmi Aziz Lisa Adhani Misri Gozan Muhammad Farhan Muryanto Nanda Saridewi, Nanda Nani Suryani Ramadhan, Fitri Nur Tamamala, Ananda Farhan Tarso Rudiana, Tarso Taryono, Taryono Tulhusna, Latifah Yanni Sudiyani Yasir, Hilmi Naufal Yulyani Nur Azizah Zhorif, Sherina Arestia