Sintesis dan Karakterisasi Komposit PANi/ZnO Sebagai Sensor Gas Metanol
DOI:
https://doi.org/10.25077/jfu.11.3.393-400.2022Keywords:
Polianilin, Zinc Oxide, Sensor, Gas MetanolAbstract
Pada penelitian ini telah dilakukan sintesis dan karakterisasi komposit PANi/ZnO untuk mengetahui karakteristik komposit PANi/ZnO serta membandingkan nilai sensitivitas sensor terhadap gas metanol pada variasi konsentrasi gas metanol yang berbeda. Metode yang digunakan dalam sintesis komposit PANi/ZnO adalah polimerisasi in-situ dengan variasi komposisi ZnO yang digunakan yaitu 10%, 20% dan 30%. Hasil karakterisasi FTIR menunjukkan adanya beberapa jenis ikatan karakteristik PANi/ZnO dari semua sampel hasil sintesis. Pola XRD menunjukkan puncak tertinggi karakteristik ZnO terletak pada 36,19, sedangkan pola difraksi karakteristik PANi terletak pada 31,74Â dengan struktur kristal ortorombik. Morfologi sampel diamati menggunakan SEM hasilnya menunjukkan bahwa sampel PANi/ZnO 30% memiliki struktur ovoidal-shaped dan berpori dengan diamter 378 nm. Hasil pengukuran konduktivitas listrik menunjukkan nilai konduktivitas listrik dari sampel PANi murni memiliki nilai tertinggi yaitu 3,5810-6 S/cm, akan tetapi nilai konduktivitas listrik mengalami penurunan seiring dengan penambahan komposisi ZnO. Penggunaan komposit PANi/ZnO 30% sebagai bahan sensor gas metanol mampu menghasilkan nilai sensitivitas yang relatif tinggi, semakin tinggi konsentrasi gas metanol maka sensitivitas sensor semakin meningkat. Dengan demikian disimpulkan bahwa sampel komposit PANi/ZnO 30% merupakan sampel terbaik sebagai bahan sensor dalam mendeteksi gas metanol.References
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