Article Per Year (5 Year)
p-Index From 2021 - 2026
1.578
P-Index
This Author published in this journals
All Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Fisika Unand Jurnal Riset Kimia GEA, Jurnal Pendidikan Geografi Jurasik (Jurnal Riset Sistem Informasi dan Teknik Informatika) Tarbiyah Wa Ta'lim: Jurnal Penelitian Pendidikan dan Pembelajaran Dirasatul Ibtidaiyah Proceeding of Undergraduate Conference on Literature, Linguistic, and Cultural Studies
Yulia Eka Putri, Yulia Eka
Unknown Affiliation
Humanities Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Social Sciences

Published : 12 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 12 Documents
Search

 1   2 
Pengaruh Frekuensi Vibrasi Terhadap Kualitas Lapisan Tipis Opal yang Disintesis dengan Metode Deposisi Horizontal Putri, Yulia Eka; Muldarisnur, Mulda
Jurnal Fisika Unand Vol 9 No 1 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.9.1.9-16.2020

Abstract

Telah dilakukan sintesis dan karakterisasi lapisan tipis opal menggunakan metode deposisi horizontal dengan penambahan frekuensi vibrasi. Sintesis dilakukan pada suhu ruang dengan variasi frekuensi vibrasi 75 Hz, 200 Hz, 300 Hz, dan 400 Hz menggunakan speaker dalam keadaan volume tetap. Karakterisasi dilakukan menggunakan Mikroskop Optik, SEM (Scanning Electron Microscopy) dan Spektrofotometer UV-Vis. Hasil mikroskop optik menunjukkan permukaan sampel dengan frekuensi vibrasi rendah lebih homogen dan tebal dibandingkan frekuensi vibrasi tinggi. Hasil SEM menunjukkan lapisan multilayer terbentuk pada semua sampel. Spektrum absobsi spektrofotometer UV-Vis menunjukkan nilai absorbansi maksimum tertinggi pada panjang gelombang 588 nm dengan nilai absorbansi 0,2. Semakin tinggi frekuensi vibrasi yang digunakan, semakin kecil nilai absorbansi dan nilai FWHM. Thin opal films have been synthesized using horizontal deposition method modified applying the addition at frequency vibration. Synthesizing was carried out with at room temperature with frequency vibration of 75, 200, 300, and 400 Hz. Characterization was carried of using optical microscope, SEM (Scanning Electron Microscopy) and UV-Vis Spectrophotometer. Characterization with optical microscope shows that small frequency vibration thickner homogenity of opal sample. SEM show that multilayer layer is all sample deposition with frequency vibration 75 Hz, 200 Hz, 300 Hz and 400 Hz. The UV-Vis spectra show that the highest maximum absorbance of 0,2 at wavelength of 588 nm for frequency vibration of 75 Hz. The higher the vibration speed used, the smaller the maximum absorbance value and the smaller the FWHM value.
Pemanfaatan Ekstrak Daun Sirih Hijau (Piper Betle Linn.) sebagai Capping Agent dalam Green Synthesis Spinel Ferit ZnFe2O4 untuk Remediasi Fenol dalam Air dan sebagai Anti Bakteri Rahmayeni, Rahmayeni; Yuliani, Putri; Putri, Yulia Eka; Stiadi, Yeni
Jurnal Riset Kimia Vol. 15 No. 1 (2024): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v15i1.685

Abstract

The spinel ferrite material ZnFe2O4 was synthesized using a green synthesis approach by the hydrothermal method. In the synthesis, 2M NaOH was used as a mineralizer and betel leaf extract with varying volumes of 1, 3, 5, and 7 mL as a capping agent, then continued with calcination at 500, 600, and 700°C. Several devices, such as XRD, FT-IR, SEM-EDX, DRS-UV-Vis, and VSM, were used to characterize the synthesized ZnFe2O4 material. The pattern of XRD indicated that the ZnFe2O4 material has a cubic structure, where the increase in crystal size was after calcination. The Fourier Transform Infra-Red (FT-IR) spectrum shows the Fe-O interaction at wave numbers 427-417 cm-1, which is located on the octahedral side, while the Zn-O interaction at wave numbers 534-510 cm-1, which is located on the tetrahedral side in spinel ferrite structure. From the DRS UV-Vis spectrum pattern and band gap values, it was found that the material absorbs light in the visible region. Scanning Electron Microscope (SEM) images show that the morphology of the synthesized material is circular. The Vibrating Sample Magnetometer (VSM) hysteresis curve shows that the synthesized ZnFe2O4 has paramagnetic properties. The synthesized ZnFe2O4 material has photocatalytic activity towards phenolic compounds with a degradation percentage reaching 62.2%, and this material is active as an antibacterial with an inhibition area of 14.4 for S. aereus bacteria.
Co-Authors Amir, Firmanul Qadri Andriani, Nova Aprianti, Dila Kartika Banjarnahor, Ida Hartati Cholisa, Keyshe Nur Ekklesia, Eprilia Hanna, Shantela Harahap, Asriana Lazuardi Lazuardi Linusia Marsih Mesy Rino Nindia Muhammad Alfi Muldarisnur, Mulda Mulia, Elan Mulya, Sri Nadhif, Reyhan Ivan Nathania, Vanda Golda Niken Ayu Pamukas Nindia, Mesy Rino Novesar Jamarun Nursyaidah, Nursyaidah Padang, Endang Karina Saberina Hasibuan Sabrina, Ayu Safitri, Adek Salindeho, Arnetta Ayu Carolina Salsabilla, Annisya Simbolon, Ali Mustopa Yakub Sinaga, Elfia Lasmaida Siregar, Fitri Rayani Togatorop, Afrida Deyuwi Fortuna utami, Anggun dwi Utami, Geby Riyanti Utami, Lestari Dian Yeni Stiadi Yuliani, Putri Yundari, Yundari Yusri, Hamsal Zulhadjri Zulhadjri