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All Journal Alchemy : Journal of Chemistry Jurnal Umum Pengabdian Masyarakat (JUPEMAS)
Cindy Claudia Christanti
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Economics, Econometrics & Finance Education Energy Materials Science & Nanotechnology Social Sciences

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PELATIHAN PENGGUNAAN APLIKASI MENDELEY PADA MAHASISWA ILMU PEMERINTAHAN UNIVERSITAS TIMOR Ramadhan, Fitra; M. Angela Merici Siba; Cindy Claudia Christanti; Steffanie M. C. Noach; Jonris Tampubolon
Jurnal Umum Pengabdian Masyarakat Vol 4 No 1 (2025): Jurnal Umum Pengabdian Masyarakat
Publisher : Yayasan Pendidikan Cahaya Budaya Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58290/jupemas.v4i1.386

Abstract

Pelatihan penggunaan aplikasi mendeley bagi mahasiswa program studi ilmu pemerintahan Universitas Timor bertujuan untuk meningkatkan pemahaman mahasiswa dalam mengelola referensi dan sitasi akademik. Berdasasrkan survei awal, sebagian besar mahasiswa belum mengenal atau menggunakan mendeley dalam penulisan tugas akademik. Pelatihan ini dilakukan melalui beberapa tahapan; 1) survei, 2) presentasi, 3) praktik, 4) evaluasi. Hasil kegiatan ini menunjukkan adanya peningkatan pemahaman mahasiswa dari 22,73% menjadi 61,36% dengan tingkat kepuasan 93,16%. Namun, beberapa mahasiswa atau sekitar 36,36% masih menglami kendala dalam penggunaan fiturnya, sehingga diperlukan adanya pendampingan lebih lanjut. Secara keseluruhan, pelatihan ini efektif dalam meningkatkan keterampilan mahasiswa dalam menyusun referensi. Kata Kunci: Mendeley; Sitasi; Referensi; Pelatihan.
Structural, Optical, and Photocatalytic Properties of Sol–Gel-Derived ZnO Nanoparticles for Methylene Blue Degradation Maria Luruk Seran; Matius Stefanus Batu; Cindy Claudia Christanti; Didi Prasetyo Benu
ALCHEMY:Journal of Chemistry Vol 14, No 1 (2026): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v14i1.40636

Abstract

Zinc oxide (ZnO) nanoparticles are attractive photocatalysts due to their wide band gap, chemical stability, and nanoscale-dependent properties. Herein, ZnO nanoparticles were synthesized and systematically characterized to correlate their structural and optical properties with photocatalytic performance. Raman spectroscopy and X-ray diffraction confirmed the formation of a single-phase wurtzite ZnO structure with high crystallinity. UV–Vis diffuse reflectance spectroscopy revealed a distinct absorption edge in the UV region, and the optical band gap was determined to be 3.07 eV using the Kubelka–Munk–Tauc method. The photocatalytic activity of the synthesized ZnO was evaluated via methylene blue degradation under UV irradiation. Time-resolved UV–Vis absorption measurements showed a gradual decrease in the characteristic absorption peak at 660–670 nm, indicating effective dye degradation. A photocatalytic degradation efficiency of 60.55% was achieved after 150 min of irradiation. Kinetic analysis demonstrated that the degradation process followed pseudo-first-order kinetics with an apparent rate constant of 0.0062 min⁻¹. These results demonstrate that the synthesized ZnO nanoparticles exhibit efficient UV-driven photocatalytic activity, highlighting their potential for nanoscale photocatalyst applications. The structure–property–performance correlation established in this work provides insight for further nanostructure and defect engineering strategies to enhance photocatalytic efficiency.
Co-Authors Didi Prasetyo Benu Fitra Ramadhan Jonris Tampubolon M. Angela Merici Siba Maria Luruk Seran Matius Stefanus Batu Steffanie M. C. Noach