SINTESIS FOTOKATALIS NANOPARTIKEL ZnO UNTUK MENDEGRADASI ZAT WARNA METHYLENE BLUE
| Main Authors: | Raganata, Tirza C., Aritonang, Henry, Suryanto, Edi |
|---|---|
| Format: | Article info eJournal |
| Terbitan: |
Sam Ratulangi University
, 2020
|
| Online Access: |
http://ejournal.unsrat.ac.id/index.php/chemprog/article/view/27755 |
Daftar Isi:
- ABSTRAKTelah dilakukan penelitian tentang fotokatalis metil biru menggunakan nanopartikel ZnO yang disentisis dengan metode kopresipitasi. Kemampuan fotokatalis dilakukan terhadap zat warna methylene blue 5 ppm menggunakan fotokatalis ZnO yang disinari sinar UV-A selama 30, 60, 120, 150, dan 180 menit. Penentuan konsentrasi dihitung berdasarkan absorbansi yang didapatkan dari hasil Spektrofotometri UV-Vis dan dalam rumus menghitung % degradasi. Hasil penelitian menunjukkan bahwa yang memiliki kemampuan fotokatalis paling baik adalah Nanopartikel ZnO 10% yaitu dengan nilai persen degradasi untuk variasi waktu penyinaran 30 menit adalah sebesar 51,82%, 60 menit sebesar 65,26%, 120 menit sebesar 71,25%, 150 menit sebesar 75,78%, dan 180 menit sebesar 71,01%. Dan waktu penyinaran optimum terjadi pada waktu kontak 150 menit.Kata kunci: ZnO, fotodegradasi, metil biru. ABSTRACTA research on photocatalysts of Methylene Blue using ZnO nanoparticles were analyzed using coprecipitation method. The ability of photocatalysts was carried out on 5 ppm methylene blue dyes using ZnO photocatalysts which were exposed to UV-A rays for 30, 60, 120, 150, and 180 minutes. Determination of concentration was calculated based on the absorbance obtained from the results of the UV-Vis Spectrophotometry test reading and in the formula to calculate% degradation. The results showed that the best photocatalysts ability was ZnO 10% nanoparticles, ie the percent degradation value for 30 minutes irradiation time variation was 51.82%, 60 minutes was 65.26%, 120 minutes was 71.25%, 150 minutes at 75.78%, and 180 minutes at 71.01%. And the optimum exposure time occurs at 150 minutes contact time.Keywords: ZnO, photocatalysts, methylene blue