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All Journal Spektra: Jurnal Fisika dan Aplikasinya PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Novan Purwanto
Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia
Aerospace Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics Other

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OPTICAL PROPERTIES ANALYSES OF CHLOROPHYLL OF LEAF EXTRACT BY UV-VIS SPECTROMETER AS PRE-STUDY OF DYE SENSITIZER Dona Dianisya; Amalia Dini Silmina; Novan Purwanto; Isnaeni Isnaeni; Iwan Sugihartono
Spektra: Jurnal Fisika dan Aplikasinya Vol 3 No 2 (2018): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 3 Issue 2, August 2018
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.368 KB) | DOI: 10.21009/SPEKTRA.032.04

Abstract

ABSTRAK Telah dilakukan studi ekstraksi awal klorofil dari 3 jenis daun yaitu daun bayam (Amarantus), daun pepaya (Carica papaya), dan daun jarak (Ricinus communis). Ekstraksi dilakukan dengan teknik penghancuran menggunakan blender. Pelarut yang digunakan adalah isopropanol, asam asetat, dan DI water. Hasil penyaringan ekstrak daun diperoleh larutan sebayak 75 ml untuk setiap larutan ekstrak klorofil. Uji Ultrasonic Visible memberikan konfirmasi adanya penyerapan di rentang cahaya ultraviolet dan cahaya tampak. Sementara itu, serapan klorofil teramati di rentang cahaya tampak. Apabila dibandingkan serapan UV dan cahaya tampak, pada larutan ekstrak masih mengandung banyak gugus asam dibandingkan klorofil yang di ekstrak. Kata-kata kunci: daun bayam, daun pepaya, daun jarak, absorbansi, klorofil ABSTRACT We studied for chlorophyll extract from 3 leaf types that are spinach leaf (Amarantus), papaya leaf (Carica papaya), and castor leaf (Ricinus communis). The extraction is done by using a blender. The solvents used are isopropanol, acetic acid, and DI water. The result of leaf extract was obtained 75 ml solution for each solution of chlorophyll extract. The Visible Ultrasonic Test confirms absorption in the range of ultraviolet light and visible light. Meanwhile, chlorophyll uptake is observed in the visible light spectrum. When compared to UV absorption and visible light, in the extract solution still contains a lot of acid groups than the chlorophyll extracted. Keywords: spinach leaf, papaya leaf, Castor leaf, absorbance, chlorophyll.
STUDI KOMPOSISI DAN SIFAT OPTIK ZNO NANORODS YANG DISINTESIS MENGGUNAKAN METODE HIDROTERMAL Novan Purwanto; Isnaeni Isnaeni; Iwan Sugihartono
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 7 (2018): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2018
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (169.316 KB) | DOI: 10.21009/03.SNF2018.02.PA.14

Abstract

Abstrak ZnO nanorods telah disintesis menggunakan teknik hidrotermal pada suhu 95 ⁰C selama 2 jam. Studi komposisi ZnO nanorods dilakukan menggunakan energy dispersive sinar-x (EDS). Hasil pengujian memberikan konfirmasi bahwa komposisi massa Zn lebih banyak dibandingkan komposisi massa O yaitu 69,44% dan 30,56%. Pengujian sifat optik ZnO nanorods menggunakan spektrofotometer UV-Vis memberikan informasi bahwa terdapat absorbansi tinggi di rentang panjang gelombang ultra-violet (UV) yaitu 360-390 nm. dan absorbansi yang lebar di rentang panjang gelombang cahaya tampak. Kata-kata kunci: ZnO nanorods, komposisi, absorbansi, band gap energy Abstract ZnO nanorods have been synthesized by hydrothermal method at 95 °C for 2 hours. The study composition of ZnO nanorods was performed using energy dispersive x-ray (EDS). The results confirm that elemental mass compositions of Zn and O are 69,44% and 30,56%. The optical properties of ZnO nanorods which investigated by using the UV-Vis spectrophotometer confirmed that the strong absorbance is in the range of UV wavelength (360-390 nm), and wide absorbances in the wavelength range of visible light. Keywords: ZnO nanorods, compositions, absorbance, band gap energy
Co-Authors Amalia Dini Silmina Dona Dianisya Isnaeni Isnaeni Isnaeni Isnaeni Iwan Sugihartono