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All Journal Journal of Technomaterial Physics International Review of Practical Innovation, Technology and Green Energy (IRPITAGE)
Zikri Noer
Universitas Sumatera Utara
Humanities Astronomy Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics Social Sciences Other

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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.
COMMUNITY ECONOMIC EMPOWERMENT THROUGH HONEY SUCTION TECHNOLOGY AND COLONY SPLITTING EQUIPMENT FOR STINGLESS BEEKEEPERS IN TANJUNG PASIR VILLAGE Wahyu Ario Pratomo; Yasmin Chairunisa Muchtar; Zikri Noer; Yola Anggia
International Review of Practical Innovation, Technology and Green Energy (IRPITAGE) Vol. 6 No. 2 (2026): July-October 2026
Publisher : RADJA PUBLIKA

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Abstract

Stingless bee (Trigona sp.) cultivation in Tanjung Pasir Village, Pangkalan Susu, Langkat Regency, North Sumatra has become an important economic activity managed by the Hutan Maju Bersama Trigona Farmer Group since 2024, through a sustained international community service program in collaboration with Universiti Teknologi MARA (UiTM) Terengganu, Malaysia. In its third year, the partner group faced a shift in problems from colony quantity toward harvesting efficiency and production capacity: the honey suction device used lacked suction control and an integrated filtering system, causing slow, unhygienic harvesting and occasional bee loss, while limited beehive boxes (lots) restricted colony-splitting expansion. This activity aimed to design and implement a honey suction machine with an integrated filter and to provide additional beehive lots for colony splitting. The method included needs assessment, machine design and fabrication at the Faculty of Mathematics and Natural Sciences Laboratory, Universitas Sumatera Utara, field trials, user training, and distribution of new beehive lots. Field testing on 15 August 2026 showed the machine successfully performed suction and filtration simultaneously, reducing manual filtering steps and improving honey cleanliness. The number of beehive lots owned by the group increased from around 20 to 40, with several new lots showing successful colony development. This program strengthens sustainable livelihood and supports SDGs 2, 8, and 17.
Co-Authors Alya Nazwariva Ervina Putri Wulandari Jihan Murtadha Rambe Martha Rianna Muhammad Abduh Akram Agus Syahrul Humaidi, Syahrul Wahyu Ario Pratomo Yasmin Chairunisa Muchtar Yola Anggia