Infiltrasi Opal dengan Titanium Dioksida (TiO2) Menggunakan Metode Sol Gel
DOI:
https://doi.org/10.25077/jfu.7.3.260-265.2018Abstract
Telah dilakukan infiltrasi opal dengan metode sol-gel. Bahan utama yang digunakan dalam pembuatan opal adalah polystyrene dengan ukuran diameter 252 nm. Opal polystyrene diinfiltrasi menggunakan Titanium Tetraisopropoxide (TTIP) dan etanol untuk menghasilkan lapisan tipis TiO2. Konsentrasi TTIP divariasikan 3%, 6% dan 10%. Polystyrene yang telah diinfiltrasi dihilangkan dengan perlakuan panas pada suhu 600 °C. Hasil karakterisasi mikroskop optik, UV-Vis dan SEM menunjukkan bahwa opal dan lapisan TiO2 terbentuk dengan ukuran partikel ± 0,68 μm. Opal yang terbentuk memiliki nilai absorbansi
1,8943 pada panjang gelombang 598 nm. Ukuran partikel TiO2 yang besar disebabkan karena penggunaan suhu yang terlalu tinggi pada saat kalsinasi yang menyebakan rongga pada polystyrene tidak dapat diinfiltrasi sehingga TiO2 hanya tumbuh pada permukaan substrat.
Kata kunci: Opal, kalsinasi, infiltrasi, sol-gel, polystyrene, TiO2.
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