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All Journal Science and Technology Indonesia Jurnal Pengabdian West Science
Nurlela, Ai
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Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Education Environmental Science Materials Science & Nanotechnology Physics Public Health Social Sciences

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Metamorfosis Sampah Plastik Menjadi Paving Blok dan Pembangunan Kesadaran Mitigasi Bencana di Desa Mekarjaya, Kecamatan Kabandungan, Kabupaten Sukabumi Rosyidah, Dania Meida; Hadi, Naufal Nurul; Hadi, Lutfi; Ghifari, Muhammad; Gumilang, Wisnu; Lisdiawanti, Eri Siti; Nurlela, Ai; Aprilia, Alya; Febrira, Revalizza; Milah, Siti Raihatul; Tiara Harahap, Dea Arme; Nuryasin, Marlika
Jurnal Pengabdian West Science Vol 4 No 09 (2025): Jurnal Pengabdian West Science
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/jpws.v4i09.2692

Abstract

Permasalahan pengelolaan sampah plastik yang dibakar warga akibat tidak adanya sistem pengangkutan sampah dan kebiasaan membakar sampah di tempat khusus di setiap rumah menjadi isu lingkungan serius. Selain itu, minimnya pemahaman masyarakat tentang mitigasi bencana di daerah pegunungan yang rawan longsor, dimana warga menyepelekan potensi bencana selain banjir menjadi fokus utama. Tujuan pengabdian ini adalah memberdayakan masyarakat melalui inovasi paving blok berbahan sampah plastik sebagai solusi ekonomi hijau dan meningkatkan kesadaran siswa SD kelas 6 tentang mitigasi bencana. Metode yang digunakan adalah pelatihan partisipatif untuk masyarakat dalam pembuatan paving blok dan edukasi interaktif untuk siswa tentang jenis-jenis bencana dan upaya pencegahannya. Hasil pengabdian menunjukkan terciptanya produk paving blok ramah lingkungan yang bernilai ekonomis dan meningkatnya kesadaran siswa tentang kesiapsiagaan bencana di daerah pegunungan.
Significant Reduction in Lattice Thermal Conductivity of (PbTe)0.95 - (PbS)0.05 Thermoelectric Materials Through Liquid Silicon Quenching Ginting, Dianta; Nurlela, Ai; Nanto, Dwi; Mashadi; Sudiro, Toto; Kristiantoro, Tony; Rhye, Jong-Soo
Science and Technology Indonesia Vol. 10 No. 4 (2025): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.4.1087-1095

Abstract

Thermoelectric materials are game-changers, that have the ability to transform waste heat into electrical energy, making them a potential renewable energy solution to reduce reliance on fossil fuels. The standard metric for evaluating thermoelectric materials is the dimensionless figure of merit, ZT, which is markedly influenced by lattice thermal conductivity (ĸl ). Higher thermal transport through the lattice lowers the ZT value, reducing the material’s efficiency. Therefore, finding ways to decrease ????l is critical for boosting thermoelectric performance. In our research, we explored an innovative approach by applying a quenching technique using liquid silicon to reduce thermal conductivity (ĸT ) due to lattice vibrations. We compared the lattice conductivity (ĸl ) of materials with and without this liquid silicon quenching process. The results were striking: at 300 K, quenching lowers the lattice thermal conductivity by about 40.1 %, and at 800 K, it is still reduced by roughly 24.7%compared with pristine PbTe. Even more impressive, when compared to non-quenched (PbTe)0.95 − (PbS)0.05 alloys, at 300 K, the silicon-quenched sample attains an additional ĸl reduction of roughly 16.1 %, while at 800 K the extra decrease is about 13.0%. These findings highlight that liquid silicon quenching is a highly effective method for lowering ĸl of PbTe thermoelectric materials. This approach paves the way for developing next-generation thermoelectric materials that are more efficient, particularly for eco-friendly waste heat recovery applications. Our work opens new possibilities for sustainable energy innovation.
Co-Authors Aprilia, Alya Dwi Nanto, Dwi Febrira, Revalizza Ginting, Dianta Gumilang, Wisnu Hadi, Naufal Nurul Lisdiawanti, Eri Siti Lutfi Hadi Mashadi Milah, Siti Raihatul Muhammad Ghifari, Muhammad Nuryasin, Marlika Rhye, Jong-Soo Rosyidah, Dania Meida Tiara Harahap, Dea Arme Tony Kristiantoro, Tony Toto Sudiro