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All Journal Jurnal Pendidikan Indonesia Ta'dibi: Jurnal Manajemen Pendidikan Islam EMITTER International Journal of Engineering Technology ELSE (Elementary School Education Journal) : Jurnal Pendidikan dan Pembelajaran Sekolah Dasar al-Afkar, Journal For Islamic Studies Communications in Science and Technology Greget Symmetry: Pasundan Journal of Research in Mathematics Learning and Education Bitnet: Jurnal Pendidikan Teknologi Informasi Hisbah: Jurnal Bimbingan Konseling dan Dakwah Islam BISEI: Jurnal Bisnis dan Ekonomi Islam International Journal of Business and Social Science Research Jurnal teknologi Kesehatan Borneo International Journal of Progressive Mathematics Education AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) J-AKSI : JURNAL AKUNTANSI DAN SISTEM INFORMASI Economic Reviews Journal Ius Positum: Journal of Journal Of Law Theory And Law Enforcement Jurnal Manajemen USNI Journal Community Service Consortium AMMA : Jurnal Pengabdian Masyarakat JRIIN :Jurnal Riset Informatika dan Inovasi Japanology Jurnal Pengembangan Potensi Laboratorium Journal of Community Service (Abdisci) Journal of Studies in Academic, Humanities, Research, and Innovation HUNILA : Jurnal Ilmu Hukum dan Integrasi Peradilan
Slamet
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Journal : Communications in Science and Technology

 1 
Combined enzymatic and ultrasound-assisted aqueous two-phase extraction of antidiabetic flavonoid compounds from Strobilanthes crispus leaves Arbianti, Rita; Angelina; Suryapranata, Bryan; Purwati Latifah, Linatri; Fadilah Putri, Najah; Surya Utami, Tania; Muharam, Yuswan; Slamet
Communications in Science and Technology Vol 8 No 2 (2023)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.8.2.2023.1214

Abstract

A novel green extraction method combining enzymatic and ultrasound-assisted aqueous two-phase extractions was employed to enhance and purify the flavonoid extract from Strobilanthes crispus leaves. Cellulase was used in the pretreatment, and ethanol-(NH4)2SO4 was selected as the solvent. A concentration of 7% (w/w) cellulase and a duration of 2 h were the optimal conditions for pretreatment. The optimal conditions for ultrasound-assisted aqueous two-phase extraction were 33% (w/w) ethanol and 14% (w/w) (NH4)2SO4 as they produced a yield (77.81%), partition coefficient (31.17), extraction efficiency (98.04%), and a high total flavonoid content (0.3666 mg QE/g dry leaf powder). Six compounds from the leaf extract were identified through liquid chromatography-mass spectrometry/mass spectrometry-quadrupole-time of flight (LCMS/MS-Q-TOF) analysis. The crude extract and three compounds in it (kaempferol, graveobioside A, and genistein) showed an antidiabetic activity with IC50 values of 390.35, 201.87, 292.73, and 431.82 mg/mL, respectively. These values are comparable to the standard drug acarbose.
Utilization of glycerol solution for hydrogen production by a combination of photocatalysis and electrolysis processes with Fe-TiO2 nanotubes Santoso, Calvin; Ratnawati; Slamet
Communications in Science and Technology Vol 8 No 2 (2023)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.8.2.2023.1280

Abstract

A combination of photocatalysis and electrolysis (photoelectrocatalysis) for the simultaneous degradation of glycerol and hydrogen production using Fe-TiO2 nanotubes has been studied. This photocatalyst was synthesized through Ti anodization followed by Fe deposition with Fe(NO3)3 as precursor using the SILAR (successive ionic layer adsorption and reaction) method. The effects of Fe loading (based on the number of SILAR cycles) on TiO2 nanotubes and glycerol concentration were examined. The generated TiO2 nanotubes were 100% anatase phase with crystallite size between 25 and 29 nm. The results of UV-Vis DRS showed that the number of SILAR cycles of Fe dopant determined the magnitude of the decrease in the band gap of photocatalysts up to 2.74 eV, notably lower than a typical value of 3.15 eV associated with TiO2 anatase. FESEM/EDX, TEM, and HRTEM characterizations indicated the formation of neatly arranged TiO2 nanotubes with Fe deposited on the surface. The photoelectrocatalytic process increased the hydrogen produced by up to 5 times compared to a single photocatalytic or electrolysis process. The photocatalyst sample with Fe deposited on TiO2 nanotubes via a SILAR method with 15 cycles outperformed its bare TiO2 nanotube counterpart by producing hydrogen by 2.5 times (405.8 mmol/m2). Glycerol photo-reforming at 10% concentration produced hydrogen 6 times greater than water splitting (0% glycerol).
Simultaneous tartrazine-tetracycline removal and hydrogen production in the hybrid electrocoagulation-photocatalytic process using g-C3N4/TiNTAs Husein, Saddam; Rustamadji, Ryan Rafi; Pratiwi, Reno; Dewi, Eniya Listiani; Slamet
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1308

Abstract

This study aimed to investigate the removal of tartrazine dye & tetracycline antibiotic and hydrogen (H2) production simultaneously through the hybrid electrocoagulation-photocatalytic process using g-C3N4/TiO2 nanotube arrays (TiNTAs) nanocomposite. The g-C3N4/TiNTAs was used as the photocatalyst. The melamine as the precursor of g-C3N4 was varied to obtain the optimal loading on the removal of tartrazine dye & tetracycline antibiotic and hydrogen (H2) production simultaneously. The integrated acrylic photoreactor was equipped with two 250-W mercury lamps. The nanotubular morphology of TiNTAs and nanostructure features of g-C3N4/TiNTAs were examined using FESEM/EDX and HR-TEM/SAED. The XRD patterns indicated the composition of TiNTAs, confirming the presence of anatase and rutile crystalline phases. UV-Vis DRS also showed a redshift in the composite absorbance and a reduced bandgap with g-C3N4 introduction. The results showed that when tartrazine and tetracycline were treated simultaneously, tartrazine was more dominantly degraded compared to tetracycline. In mixed pollutant system condition, the H2 production increased by 17.0% and 41.1% compared to single pollutant system of tartrazine and tetracycline, respectively. The photocatalyst used in the hybrid process was the g-C3N4/TiNTAs (3 g) which provide the optimum H2 production.
Simultaneous photoelectrocatalytic hydrogen production and ammonia degradation using titania nanotube-based photoanodes Elysabeth, Tiur; Dewi, Eniya Listiani; Ratnawati; Mulia, Kamarza; Slamet
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1464

Abstract

The primary focus of this research is to enhance the efficiency and effectiveness of the photoanode based of titania nanotubes in the photoelectrocatalytic process, which enables the simultaneous generation of hydrogen and degradation of ammonia. The modification process involved the incorporation of nitrogen dopant during anodization and sensitization of CuO through Successive Ionic Layer Adsorption Reaction (SILAR). The results of this study showed that the introduction of N dopant led to a significant enhancement in both the ammonia elimination and the hydrogen production, as evidenced by 3N-TiNTAs achieving 74.4% and 561 mmol/m2, respectively. Meanwhile, the highest hydrogen production was observed with 7CuO-TiNTAs at 910.14 mmol/m2. The study revealed that N-TiNTAs exhibited superior performance in ammonia degradation; while CuO-TiNTAs showed higher hydrogen production rates. Furthermore, the mechanistic aspects of the study were also thoroughly examined.
Co-Authors Al-Farisi, Nizar Ahmad Angelina Anggraini, Maya Lestari Ari Nuswantoro As’ady, Mustofa Budi Suhendro Dani Ramdani, Dani Denni Lesmana Dinasti Aprillia Elfrida Ratnawati Eniya Listiani Dewi Erlin Melani Fadilah Putri, Najah Fitrah Yuliawati Hamdani Hendriana, Benny Hery Susanto Indrayati Indrayati Ismil Mubarok Isnan Murdiansyah Istanto, Iwan Juhan Syah, Fahmi Kamarza Mulia, Kamarza Lesmana, Denni Lucy Nancy Manshur, Fauzan Al Mariana Matsuri Maulidiyah Salim miftah nugroho Miswan Ramdani Mochammad Arifin Mohammad Jusak Mohammad Nurul Huda Muhammad Irfan muhammad irfan Muhammad Noor Fitriyanto Muis, Ahmad Munajat Munajat, Munajat Mutiarani Pionera Nadifa Ariya Maulinda Ningrum, Eva Veronika Cahya Nur Husna Afandi, Alia Nurul amin, Nurul Oktarina, Yetti Oktaviani Adhi Suciptaningsih Pahlewi, Reza Mina Pajri, Ari Purwati Latifah, Linatri Putra, Galih Rangga Ramadhan, Genta RATNAWATI Ria Ester Rio Natanael Wijaya Riska Pristiani Rita Arbianti Rokhmat Arifianto Rustamadji, Ryan Rafi Saddam Husein, Saddam Samsul Rosadi Santoso, Calvin Sartika, Farahiyah Sartika Setiani Sianipar, Ronald Siti Aisyah Soekorini, Noenik Subekti Sulaiman , Robi Suryapranata, Bryan Tamo Bapa, Agustinus Tania Surya Utami Teguh Santoso Teguh Sutanto Tiur Elysabeth Tutut Wurijanto Uus Ruswandi Widana, Alit Wildan Mahmudin Yanto Maulana Restu Yati, Mirta Dwi Yuswan Muharam