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All Journal Jurnal Pendidikan IPA Indonesia Indonesian Journal of Mathematics and Natural Sciences
S. Sutarno, S.
Jurusan Kimia, FMIPA, Universitas Gadjah Mada, Indonesia
Education Mathematics

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STUDI AKTIFITAS FOTOKATALITIK MCM-41 TEREMBAN ZN PADA ZAT WARNA METILEN BIRU Vifta, R. L.; Sutarno, S.; Suyanta, S.
Jurnal MIPA Vol 39, No 1 (2016): April 2016
Publisher : Jurnal MIPA

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Abstract

Pengujian aktifitas fotokatalitik material MCM-41 teremban Zn yang dilakukan secara post-synthesis telah berhasil dilakukan. Tujuan penelitian ini adalah mengetahui pengaruh pengembanan Zn secara post-synthesis terhadap material MCM-41 serta mengkaji kemampuan fotokatalitik ZnO/MCM-41 pada zat warna metilen biru. Material MCM-41 yang telah diemban dengan Zn dikarakterisasi menggunakan XRD, isoterm adsopsi gas N2, dan DR-UV, kemudian diaplikasikan untuk proses fotokatalitik zat warna metilen biru. Hasil penelitian menunjukkan bahwa adanya Zn pada material MCM-41 menurunkan kristalinitas dan keteraturan pori yang diikuti dengan terbentuknya oksida Zn pada permukaan MCM-41. ZnO/MCM-41 memiliki luas permukaan dan diameter pori lebih kecil dari MCM-41 yakni sebesar 808,4 m2/g dan 26,5 Å sedangkan MCM-41 894,7 m2/g dan 31,42 Å. ZnO/MCM-41 memiliki serapan panjang gelombang pada 325 nm dengan nilai energi gap 3,81 eV. Hasil pengujian aktivitas fotokatalitik pada material ZnO/MCM-41 terhadap zat warna metilen biru memberikan hasil sebesar 72,94% untuk perlakuan dengan UV dan 58, 46% tanpa UV.Study of photocatalytic activity on MCM-41 material doped Zn by post-synthesis process has been done. The aim of the research is to see the influence of Zn doping on MCM-41 material and ability of photocatalytic ZnO /MCM-41 on blue dye methylene. MCM-41 doped Zn was characterized by XRD, isotherm adsorption N2, and DR-UV, then applied for photodegradation of blue dye methylene. The result shows that the presence of Zn in the MCM-41 material decreases the crystallinity and regularity of pore followed by the formation of zinc oxide on the surface of MCM-41. ZnO / MCM-41 has a smaller surface area and pore diameter than MCM-41 which equals to 808.4 m2/g and 26.5 Å, while MCM-41 894.7 m2/g and 31.42 Å. ZnO/MCM-41 has an absorption wavelength at 325 nm with an energy gap of 3.81 eV. The test result of photocatalytic activity on material ZnO/MCM-41 to blue dye methylene is 72.94% for treatment with UV and 58, 46% without UV.
STUDI AKTIFITAS FOTOKATALITIK MCM-41 TEREMBAN ZN PADA ZAT WARNA METILEN BIRU Vifta, R. L.; Sutarno, S.; Suyanta, S.
Indonesian Journal of Mathematics and Natural Sciences Vol 39, No 1 (2016): April 2016
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pengujian aktifitas fotokatalitik material MCM-41 teremban Zn yang dilakukan secara post-synthesis telah berhasil dilakukan. Tujuan penelitian ini adalah mengetahui pengaruh pengembanan Zn secara post-synthesis terhadap material MCM-41 serta mengkaji kemampuan fotokatalitik ZnO/MCM-41 pada zat warna metilen biru. Material MCM-41 yang telah diemban dengan Zn dikarakterisasi menggunakan XRD, isoterm adsopsi gas N2, dan DR-UV, kemudian diaplikasikan untuk proses fotokatalitik zat warna metilen biru. Hasil penelitian menunjukkan bahwa adanya Zn pada material MCM-41 menurunkan kristalinitas dan keteraturan pori yang diikuti dengan terbentuknya oksida Zn pada permukaan MCM-41. ZnO/MCM-41 memiliki luas permukaan dan diameter pori lebih kecil dari MCM-41 yakni sebesar 808,4 m2/g dan 26,5 Ã… sedangkan MCM-41 894,7 m2/g dan 31,42 Ã…. ZnO/MCM-41 memiliki serapan panjang gelombang pada 325 nm dengan nilai energi gap 3,81 eV. Hasil pengujian aktivitas fotokatalitik pada material ZnO/MCM-41 terhadap zat warna metilen biru memberikan hasil sebesar 72,94% untuk perlakuan dengan UV dan 58, 46% tanpa UV.Study of photocatalytic activity on MCM-41 material doped Zn by post-synthesis process has been done. The aim of the research is to see the influence of Zn doping on MCM-41 material and ability of photocatalytic ZnO /MCM-41 on blue dye methylene. MCM-41 doped Zn was characterized by XRD, isotherm adsorption N2, and DR-UV, then applied for photodegradation of blue dye methylene. The result shows that the presence of Zn in the MCM-41 material decreases the crystallinity and regularity of pore followed by the formation of zinc oxide on the surface of MCM-41. ZnO / MCM-41 has a smaller surface area and pore diameter than MCM-41 which equals to 808.4 m2/g and 26.5 Ã…, while MCM-41 894.7 m2/g and 31.42 Ã…. ZnO/MCM-41 has an absorption wavelength at 325 nm with an energy gap of 3.81 eV. The test result of photocatalytic activity on material ZnO/MCM-41 to blue dye methylene is 72.94% for treatment with UV and 58, 46% without UV.
Implementation of 5E Plus Learning Model on Energy Subject Matter to Improve Students’ Argumentation Skills Wikara, B.; Sutarno, S.; Suranto, S.; Sajidan, S.
Jurnal Pendidikan IPA Indonesia Vol 11, No 2 (2022): June 2022
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v11i2.30567

Abstract

Argumentation skills consist of 2 elements: skills to construct arguments and implement them. However, some studies show that students’ argumentation skills were low. This study proposed the 5E Plus learning model to improve students’ argumentation skills. The model consists of an element named Enliven and six syntaxes: Orientation, Engagement, Exploration, Explanation, Elaboration, and Evaluation. This study aimed to investigate the effectiveness of the 5E Plus learning model in improving students’ argumentation skills. This study used Energy subject matter (which consisted of 3 topics, Mechanical, Heat, and Electrical Energy). The study’s sample consisted of 40 1st semester college students from the Natural Science department and was taken randomly. We used One-Group Pretest-Posttest as a research design and collected data using an argumentation skills test. The data was examined using an Independent sample t-test to determine the effectiveness of the 5E Plus learning model. The results were: 1) the 5E Plus learning model was effective for improving students’ argumentation skills, 2) All components of students’ argumentation skills were successfully improved, which warrant experienced the highest improvement, 3) Students’ argumentation skills in all three topics were successfully improved, which in Mechanical Energy topic the skills experienced the highest improvement. 
Co-Authors R. L. Vifta, R. L. S. Suyanta, S. Sajidan Sajidan Suranto, S. Wikara, B.