Sintesis dan Analisis Absorbsi UV-Vis Nanokomposit ZnO@CQD (Carbon Quantum Dots)

Authors

  • Nabila Fadia Haya universitas andalas
  • Astuti Astuti Laboratorium Fisika Material, Dapartemen Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Andalas Kampus Unand Limau Manis, Padang, 25163, Indonesia
  • Sri Rahayu Alfitri Usna Laboratorium Fisika Material, Dapartemen Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Andalas Kampus Unand Limau Manis, Padang, 25163, Indonesia

DOI:

https://doi.org/10.25077/jfu.13.3.406-412.2024

Keywords:

CQD, hidrotermal, sonikasi, ZnO

Abstract

Penelitian tentang sintesis dan analisis absorbsi UV-Vis nanokomposit ZnO@CQD telah dilakukan. Penelitian ini bertujuan untuk menganalisa absorbsi UV-Vis ZnO terhadap penambahan larutan CQD. Sampel yang digunakan yaitu nanopartikel ZnO dan nanokomposit ZnO@CQD dengan variasi volume CQD 10 ml, 20 ml, dan 30 ml. Metode yang digunakan untuk pembuatan ZnO dan CQD adalah metode hidrotermal, sedangkan penggabungan ZnO@CQD dilakukan dengan metode sonikasi. Karakterisasi sampel menggunakan x-ray diffraction (XRD), fourier transform infrared (FTIR), dan spektrofotometer UV-Vis. Hasil karakterisasi XRD menunjukkan ZnO dan ZnO@CQD (30 ml) memiliki struktur kristal wurtzite hexagonal untuk ZnO dan cubic untuk CQD. Ukuran kristal ZnO sebesar 27,27 nm, sementara ZnO@CQD (30 ml) 40,86 nm. Hasil uji FTIR pada variasi ZnO@CQD terdapat ikatan Zn-O yang menunjukkan terbentuk ZnO dan ikatan C=C menunjukkan terbentuknya CQD. Analisis hasil karakterisasi UV-Vis didapatkan rentang cahaya UV pada panjang gelombang 300-400 nm, sedangkan pada rentang panjang gelombang 400-700 nm absorbsi mengalami peningkatan karena variasi larutan CQD. Perhitungan nilai celah pita energi menggunakan metode touc plot didapatkan celah pita energi untuk ZnO sebesar 3,15 eV, sedangkan celah pita energi ZnO@CQD 10 ml, 20 ml, dan 30 ml berturut-turut adalah 3,17 eV, 3,12 eV, dan 3,16 eV.

Author Biographies

Nabila Fadia Haya, universitas andalas

Dapartemen Fisika

Astuti Astuti, Laboratorium Fisika Material, Dapartemen Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Andalas Kampus Unand Limau Manis, Padang, 25163, Indonesia

Dapartemen Fisika

Sri Rahayu Alfitri Usna, Laboratorium Fisika Material, Dapartemen Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Andalas Kampus Unand Limau Manis, Padang, 25163, Indonesia

Dapartemen Fisika

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Published

2024-05-01

How to Cite

Haya, N. F., Astuti, A., & Usna, S. R. A. (2024). Sintesis dan Analisis Absorbsi UV-Vis Nanokomposit ZnO@CQD (Carbon Quantum Dots). Jurnal Fisika Unand, 13(3), 406–412. https://doi.org/10.25077/jfu.13.3.406-412.2024

Issue

Vol. 13 No. 3 (2024)

Section

Articles

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