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All Journal IJCR (Indonesian Journal of Chemical Research) Jurnal Inovasi Pendidikan Kimia
Sanam, Putra Reinho Rosario
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology

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Sintesis dan Karakterisasi Silika Gel Dari Limbah Batu Akik Asal Desa Nian Kabupaten Timor Tengah Utara Menggunakan Metode Sol Gel Landi Pote, Lodowik; Sanam, Putra Reinho Rosario; Latumakulita, Gertreda
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Volume 7, ISSUE 2, 2022
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol7.iss2.art2

Abstract

Penelitian tentang sintesis dan karakterisasi silika gel dari limbah batu akik asal Desa Nian Kabupaten Timor Tengah Utara menggunakan metode sol gel telah dilakukan. Penelitian ini bertujuan untuk mengetahui komposisi kimia, karakteristik silika gel yang disintesis dari limbah batu akik asal Desa Nian Kabupaten Timor Tengah Utara yang dapat digunakan sebagai sumber sintesis silika gel. Metode penelitian yang digunakan adalah metode sol gel. Penelitian ini diawali dengan pencucian serbuk limbah batu akik dengan HCl 2 M untuk menghilangkan unsur-unsur pengotor. Selanjut ekstraksi silika dilakukan dengan mereaksikan dengan NaOH 3 M untuk memperoleh natrium silikat. Natrium silikat yang diperoleh selanjutnya disintesis menjadi silika gel dengan menambahkan HCl 3 M tetes demi tetes sampai pH netral. Silika gel hasil sintesis dianalisis komposisi dengan XRF dan dikarakterisasi dengan XRD dan FTIR.  Hasil penelitian menunjukkan bahwa komposisi kimia serbuk limbah batu akik dengan XRF diperoleh Si 35,6 % dan kandungan terbesar adalah Ca yaitu 54,3 %. Silika gel hasil sintesis memiliki kemurnian adalah SiO2 99,1 % dan Si 97,6 %. Hasil karakterisasi dengan XRD menunjukkan silika gel hasil sintesis berbentuk fasa amorf dan hasil karakterisasi gugus fungsi dengan FTIR menunjukkan adanya gugus fungsi siloksan dan silanol.
Development of Ethno-Vlog Integrated E-LKPD on Chemical Reaction Equations to Enhance Students’ Scientific Literacy and Creative Thinking Skills Sanam, Putra Reinho Rosario; Tri Prasetya, Agung; Harjono, Harjono
Jurnal Inovasi Pendidikan Kimia Vol. 19 No. 2 (2025): Jurnal Inovasi Pendidikan Kimia
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jipk.v19i2.15884

Abstract

This study aimed to develop and evaluate an Integrated Ethno-Vlog E-LKPD (Electronic Student Worksheet) to enhance students’ scientific literacy and creative thinking skills in chemistry learning. The research used a Research and Development (R&D) approach, employing a modified 3D model of Thiagarajan’s 4D development, consisting of the definition, design, and development stages. The study involved 36 students from Grades X and XI at SMAK St. Gabriel Noemuti as participants. Data collection techniques included questionnaires, interviews, classroom observations, expert validations of content and media, and pretest-posttest assessments of scientific literacy and creative thinking. Quantitative analysis was conducted using pretest, posttest, and N-Gain scores to measure learning outcomes. The results showed that the average scientific literacy score was 81.43, with an N-Gain of 0.63, categorized as moderate, while the average creative thinking score was 81%, indicating a notable improvement. The integration of local wisdom through Ethno-Vlog videos in the E-LKPD helped students connect chemical concepts, particularly chemical reaction equations, with real-life phenomena in their surrounding environment. These findings suggest that the Integrated Ethno-Vlog E-LKPD is effective in supporting students’ understanding, fostering scientific literacy, and enhancing creative thinking skills, providing a promising approach for contextual and culturally relevant science learning
Co-Authors Gertreda Latumakulita Harjono Harjono Landi Pote, Lodowik Tri Prasetya, Agung