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All Journal MASALIQ: Jurnal Pendidikan dan Sains Gudang Jurnal Multidisiplin Ilmu
Olga Tiara Rizki
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Religion Aerospace Engineering Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Public Health Social Sciences Other

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Pembuatan Virgin Coconut Oil (VCO) Menggunakan Metode Penggaraman Dengan NaCl Najla Dhifa Tofanny; Olga Tiara Rizki; Khalisa; Sisri Wartati; Desy Kurniawati; Arif Juliari Kusnanda
Gudang Jurnal Multidisiplin Ilmu Vol. 2 No. 6 (2024): GJMI - JUNI
Publisher : PT. Gudang Pustaka Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59435/gjmi.v2i6.660

Abstract

Virgin Coconut Oil (VCO) merupakan produk minyak kelapa murni yang proses pembuatannya tidak melibatkan proses pemanasan dan pengerjaannya pun sangat sederhana. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan garam NaCl terhadap hasil dan kualitas VCO. Hasil dari penelitian pada penambahan NaCl berbau minyak kelapa segar sesuai dengan ketentuan SNI. Pada uji bilangan asam didapatkan bahwa hasil analisis bilangan asam sebesar 0,11% pada minyak VCO kontrol maupun dengan penambahan NaCl. Kesimpulan pada perconaan ini diperoleh pada uji organoleptik didapat perbedaan yg signifikan dari kedua variasi, pada uji bilangan asam diperoleh hasil yang sama sebesar 0,11% dan untuk uji terakhir volume dari vco penggaraman lebih banyak dibandingan dengan kontrol.
Pengaruh Cetyltrimethylammonium Bromide pada Nilai Bandgap Semikonduktor TiO₂-ZnO Olga Tiara Rizki; Hary Sanjaya
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6737

Abstract

This study aims to investigate the effect of adding the surfactant Cetyltrimethylammonium Bromide (CTAB) on the bandgap energy of the TiO₂-ZnO semiconductor material. The material was synthesized using the sol-gel method and characterized by UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). Variations in CTAB concentration (0.015–0.035 grams) were introduced to evaluate changes in the material’s optical properties. The results show that CTAB addition up to 0.025 grams reduced the bandgap energy from 3.225 eV to 3.004 eV. This decrease is attributed to the formation of structural defects such as oxygen vacancies and reduced particle size, which introduce additional energy states within the bandgap. However, further addition of CTAB beyond 0.025 grams led to an increase in bandgap energy, likely due to particle agglomeration and structural disruptions. These findings indicate that CTAB not only acts as a surfactant but also plays a role in tuning the structure and optical properties of TiO₂-ZnO. Therefore, optimizing CTAB concentration is crucial for enhancing the material's performance in photocatalytic and solar cell applications.
Co-Authors Arif Juliari Kusnanda DESY KURNIAWATI Hary Sanjaya Khalisa Najla Dhifa Tofanny Sisri Wartati