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All Journal International Journal of Applied Power Engineering (IJAPE) Bulletin of Electrical Engineering and Informatics Elkawnie Science and Technology Indonesia Journal of Applied Geospatial Information Jurnal Penelitian Sains Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Indonesian Journal of Chemistry Eksakta : Berkala Ilmiah Bidang MIPA Hydrogen: Jurnal Kependidikan Kimia Journal of Technomaterial Physics International Journal of Social Service and Research Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) International Journal of Research in Vocational Studies (IJRVOCAS) PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Jurnal Rekayasa Energi Kesatria : Jurnal Penerapan Sistem Informasi (Komputer dan Manajemen)
Syahrul Humaidi, Syahrul
Department Of Physics, Faculty Of Mathematics And Natural Sciences – Universitas Sumatera Utara, Jl. Dr. T. Mansur No.9, Padang Bulan, Kec. Medan Baru, Kota Medan, Sumatera Utara
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Nitrogen-Doped Carbon Dots From Bilimbi Juice (Averrhoa bilimbi L.) Via Hydrothermal Method For Iron and Mercury Sensing Averroes Fazlur Rahman Piliang; Kerista Tarigan; Syahrul Humaidi; Diana Alemin Barus; Saharman Gea
Elkawnie Vol. 8 No. 1 (2022)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v8i1.11813

Abstract

Abstract: Carbon dots (CDs) have been widely used in various applications, one of them being metal ion sensing. Synthesizing CDs with sensing characteristics is influenced by two factors, i.e., precursor and dopant agent. This study aims to use bilimbi (Averrhoa bilimbi) with N, N-dimethylformamide (DMF) as a nitrogen source to synthesize CDs via the hydrothermal method. The result of hydrothermal showed significant colors of CDs with and without the presence of nitrogen, and these behaviors were also confirmed by the differential absorption of the CDs, with λmax of absorption at 291 nm. FTIR spectra confirmed the presence of functional groups related to CDs, such as C-H, C=H, C=N, C=O, C-O-C, and NH2. Meanwhile, emission spectra displayed fluorescent emission at λmax 495 nm (DMF 2%) and 491 nm (DMF 4%). The ion metal sensing test showed that these two samples with 2% and 4% of DMF were sensitive to Fe3+ and Hg2+ sensing. These characteristics concluded that NCDs from bilimbi juice via hydrothermal method were able in sensing metal ions, such as Fe3+ and Hg2+.Abstrak: Karbon dots (CDs) telah banyak diterapkan pada berbagai penggunaan, salah satunya adalah sebagai alat pendeteksi ion logam. Sintesis Cds dengan kemampuan mendeteksi dipengaruhi oleh dua faktor, yaitu prekursor dan agen dopant. Penelitian ini bertujuan untuk menggunakan asam belimbing wuluh (Averrhoa bilimbi) dengan penambahan N, N dimetilformamida (DMF) sebagai sumber nitrogen sebagai bahan sintesis CDs melalui metode hidrotermal. Hasil hidrotermal menunjukkan perbedaan emisi warna dari CDs dengan dan tanpa penambahan DMF, dan karakteristik ini juga ditunjukkan dengan adanya perbedaan penyerapan panjang gelombang maksimum (λmax) di 291 nm. Spektra FTIR juga mengkonfirmasi adanya gugus fungsi terkait dengan CDs, seperti C-H, C=H, C=N, C=O, C-O-C, dan NH2. Sementara itu, emisi spekra menunjukkan emisi fluorosensi pada λmax sebesar 495 nm (DMF 2%0, dan 491 nm (DMF 4%). Pendeteksian ion logam pada kedua sampel sensitif pada ion Fe3+ dan Hg2+. Karakteristik ini menyimpulkan bahwa NCDs dari jus asam belimbing dapat digunakan sebagai alat pendeteksi ion logam dalam air, khususnya pada ion logam besi dan merkuri.
Strengthening the Resilience of the Siponjot Village Community through Non-Formal Education and Planting Productive Trees for Disaster Mitigation and Welfare Improvement Muhammadin Hamid; Syahrul Humaidi; Nursal; Noor Haida Mohd Kaus; Nazwa Armi; Utami Ahda Surya; Zahwan Asrof Zahirul Ubaid
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 11 No. 1 (2026): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v11i1.25330

Abstract

This Focus Group Discussion (FGD) aims to formulate strategies to strengthen the resilience of the Siponjot Village community through non-formal education and the planting of productive trees as efforts toward disaster mitigation and welfare improvement. Siponjot Village faces potential vulnerability to natural disasters such as landslides and floods, influenced by its geographical conditions and land-use patterns. Through the FGD, which involved village authorities, community leaders, farmer groups, and youth representatives, the need to enhance community capacity in environmental management through participatory educational approaches was identified. Non-formal education initiatives were designed to improve knowledge of disaster mitigation, land conservation, and skills in cultivating and managing productive trees. The planting of productive trees was selected as an integrated strategy because it strengthens soil structure, reduces disaster risks, and provides long-term economic benefits. The results of the FGD indicate increased collective awareness, collaborative commitment among stakeholders, and the development of a community-based action plan. Therefore, integrating non-formal education with productive tree planting represents a sustainable empowerment model to enhance both community resilience and rural welfare.
Preparation and Characterization of Conductive Plastics Using Cassava Peel Waste and Addition of CuSO4 Syahrul Humaidi; Tua Raja Simbolon; Muliyati Muliyati
Journal of Technomaterial Physics Vol. 2 No. 1 (2020): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v2i1.5272

Abstract

This study investigated the characteristics of a conductive plastic based on root starch and CuSO4 filler. The mixture variation was (95:5)%; (90:10)%; (85:15)%; (80:20)% and (75:25)%. Glycerol is used to change the material as desired (plasticizer) which is called a plasticizer. The method used in the manufacture of this material is melt intercalation. Mechanical testing includes tensile strength (tensile strength) and elongation at break. Thermal testing was done using DTA (Differential Thermal Analysis) and material conductivity testing. The characterization results showed that the optimum starch composition: CuSO4 (75:25)% had a conductivity value of 7.3 x 10-2S.m-1, a thermal test value of 410ºC. The optimum tensile strength value occurs in the composition (80:20)% with a value of 4.606 MPa
Influence of Mode of Hydrothermal Treatment and Precursor State on Phase Formation and Crystallinity of Sodium Titanate Ervina Putri Wulandari; Zikri Noer; Martha Rianna; Syahrul Humaidi; Muhammad Abduh Akram Agus; Alya Nazwariva; Jihan Murtadha Rambe
Journal of Technomaterial Physics Vol. 8 No. 1 (2026): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v8i1.24729

Abstract

Sodium titanate was synthesized via a sol–gel-assisted hydrothermal method to study phase evolution and crystallinity under different hydrothermal treatment conditions and precursor compositions. Four processing routes were designed: continuous hydrothermal treatment (24 h), interrupted hydrothermal cycles (3 × 8 h), dried-gel hydrothermal treatment, and fresh-gel hydrothermal treatment. X-Ray Diffraction (XRD) was used to analyze the resulting crystal phases and crystallite sizes. Continuous treatment of fresh gel produced monoclinic Na₂Ti₆O₁₃ with small crystallites (12.4 nm), while interrupted processing increased crystallite size to 15.5 nm. Pre-drying of the sol–gel precursor prior to continuous hydrothermal treatment yielded well-defined Na₂Ti₆O₁₃ with enhanced crystallinity and larger crystallites (27.6 nm). In contrast, insufficient precursor stabilization redirected phase evolution toward monoclinic Na₂TiO₃ despite comparable crystallite size. The results demonstrate that the hydrothermal treatment mode primarily governs crystallite growth, whereas the precursor state controls phase selectivity. These findings provide a clear synthesis–structure relationship for tailoring sodium titanate materials.
Co-Authors Abdulmajid, Muhammad W. Achmad Subhan Achmad Subhan Aditia Warman Agitta Rianaris Agung Imaduddin, Agung Aldira, Syarah Alfonsius Chrisandy Pratama Siregar Aliakbar, Muhammad Alya Nazwariva Andrean Simanjuntak Andrean V. H Simanjuntak Andrean V.H Simanjuntak Armelia Yuniani Averroes Fazlur Rahman Piliang Dadan Ramdan Delviya Amisha Diana Alemin Barus Diana, Linda Diana, Linda E. Dinda Amilia Doli Bonardo Duma, Tulus Na Dwi Hanto Endah P. Sari Endah P. Sari Endah P. Sari Endah Paramita Erna Frida Ervina Putri Wulandari Estananto Fathi Marzuqi Fynnisa Zebua G. Gunawan Hari Pratomo Helena Artasari Sihombing Hendro Nugroho Heri Nugraha Herri Trisna Frianto, Herri Trisna Hibatullah, Khindi Aufa Humam Maulana Imaddudin, Agung Jihan Murtadha Rambe Kerista Sebayang Lestari Irene Purba Liza, Erliza Pratiwi Manurung, Ellya Veronika Iriani Manurung, Royston Mardiningsi Mardiningsi Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang, Marhaposan Martha Riana Martha Riana Martha Rianna Marzuki Sinambela Marzuki Sinambela Marzuki Sinambela Masherlina Masno Ginting Maulid, Nurul Mega Sirait Miftahul Fiqri Moraidah Hasanah Muhammad Abduh Akram Agus Muhammad Ali Akbar, Muhammad Ali Muhammad Wildan Abdulmajid Muhammadin Hamid Muliyati Muliyati Naibaho, Marzuki Naibaho, Yeni P. S. Naibaho, Yeni P.S Nazwa Armi Nofriha Rahmayani Siregar Nono Darsono, Nono Noor Haida Mohd Kaus Nurdin Bukit Nursal Nurul Maulida R Nasution Patra Mesiari Tarigan Perdinan Sinuhaji Perdinan Sinuhaji Perdinand Sinuhaji Rahmadsyah Rahmadsyah Ramlan, H. Rangkuti, Yusridah Resa Idha Resa Idha Resa Idha Rifai, Abdulloh Rizki Fadhillah Pratama Putra Romeo Kondouw Russell Ong Saharman Gea Sally Irvina Ritonga Santoso, Bayu Santy Meilisa Manurung Saragih, Dearninta A. P. Saragih, Immanuel Jhonson A. Sarah Mutiara Sembiring Satrio Herbirowo, Satrio Shiamny Nur Khair Tarigan Sihotang, Bertalina Simanjuntak, Andrean V. H. simanjuntak, benrad edwin Simanjuntak, Renaldo Siregar, Shinta Marito Suharlan, Didy Sulaiman, Muhammad Thariq As Surip Kartolo Susilawati Susilawati Susilawati Tarigan, Kerista Theresia Grefyolin Simbolon Timbangen Sembiring Titik Lestariningsih, Titik Tua Raja Simbolon Tulus Ikhsan Nasution Umar Muksin Umar Muksin Utami Ahda Surya Waslina Rangkuti Widya Nazri Afrida Yahya Darmawan Yahya Darmawan Yahya Darmawan Yahya Darmawan Yahya Darmawan Yahya Darmawan Yahya Darmawan Yahya Darmawan Yulianta Siregar Yusran Asnawi Zahedi Zahedi Zahwan Asrof Zahirul Ubaid Zikri Noer Zuriah Sitorus