Sintesis dan Karakterisasi Sifat Optik Nanokomposit Fe3O4@CQD (Carbon Quantum Dots)
DOI:
https://doi.org/10.25077/jfu.12.2.310-315.2023Keywords:
CQD, Fe3O4, Hidrotermal, LuminisensAbstract
Sintesis nanopartikel Fe3O4 telah dilakukanmenggunakan metode kopresipitasi yaitu dengan mencampurkan FeCl3.6H2O dan FeSO4.7H2O dengan penambahan larutan basa NH4OH. Modifikasi permukaan nanopartikel magnetik Fe3O4 oleh material luminisens yaitu carbon quantum dots (CQD) bertujuan untuk menghasilkan nanokomposit yang dapat diaplikasikan sebagai material bioimaging. Kombinasi material magnetik dan material luminisens menjadi nanokomposit magnetik luminisens menarik untuk dikembangkan dan diaplikasikan dalam bidang biomedis. CQD disintesis menggunakan metode pemanasan sederhana dengan sumber karbon berasal dari daun pisang kering. Nanokomposit Fe3O4@CQD disintesis menggunakan metode hidrotermal pada suhu 180℃ selama 12 jam. Sifat optik nanokomposit Fe3O4@CQD dianalisis berdasarkan hasil karakterisasi spektrofotometer UV-Vis. Berdasarkah hasil karakterisasi UV-Vis, nanokomposit Fe3O4@CQD memiliki empat puncak absorbansi yang berada pada panjang gelombang 294 nm, 325 nm, 341 nm, dan 362 nm. Sifat fisis CQD menunjukkan warna transparan di bawah cahaya tampak, sedangkan warna biru kehijauan ketika dikenai sinar UV. Hasil uji XRD menunjukkan adanya puncak CQD pada 24,3Ⱐdengan bidang hkl (002). Ukuran kristal nanokomposit Fe3O4@CQD sebesar 27,20 nm.References
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