Karakterisasi Sensor Liquefied Petroleum Gas (LPG) dari Bahan SnO2 Didoping dengan Al2O3

Abstract

Karakterisasi terhadap sensor gas LPG dari bahan SnO₂ didoping dengan Al₂O₃ telah dilakukan. Sampel dibuat dengan persentase doping 0%, 2%, 4%, 6%, 8% dan 10% mol terhadap bahan dasar SnO₂. Sensor gas LPG diuji pada temperatur ruang untuk mendapatkan karakteristik I-V, nilai sensitivitas, selektivitas, konduktivitas, waktu respon dan karakterisasi XRD. Berdasarkan pengukuran karakteristik I-V, sensitivitas tertinggi pada sampel 92% mol SnO₂ + 8 % mol  Al₂O₃ yaitu 4,33 pada tegangan 12 volt. Nilai selektivitas tertinggi terdapat pada sampel 92% mol SnO₂ + 8 % mol Al₂O₃ yaitu 2,67 pada tegangan 6 volt. Nilai konduktivitas tertinggi dimiliki sampel 92% mol SnO₂ + 8 % mol Al₂O₃ yaitu 12,06 x 10^-4/Ω.m pada lingkungan LPG. Waktu respon sampel  92% mol SnO₂ + 8 % mol Al₂O₃ yaitu 45 s pada tegangan 24 volt. Hasil XRD menunjukkan ukuran kristal 92% mol SnO₂ + 8 % mol Al₂O₃ yaitu 43,67 nm lebih kecil dibandingkan dengan 100% SnO₂ yaitu 57,74 nm.

Characterization of LPG gas sensors made from material SnO₂ doped with Al₂O₃ was performed. Samples were made with doped Percentages of 0%, 2%, 4%, 6%, 8% and 10% mol of the basic ingredient SnO₂. LPG gas sensors was tested at room temperature by measuring I-V’s characteristics, calculating values of sensitivity, selectivity, conductivity, response time and XRD characterization. Based on the measurement of I-V characteristics, the highest sensitivity of the sample 92% mol SnO₂ + 8% mol Al₂O₃ is 4.33 at a voltage of 12 volts. The highest selectivity value of the sample 92% mol SnO₂ + 8% mol Al₂O₃ is 2.67 at a voltage of 6 volts. The highest conductivity value was given a sample of 92% mol SnO₂ + 8% mol Al₂O₃ is 12.06 x 10-4 / Ω.m in the LPG environment. The sample’s response time is 92% mol SnO₂ + 8% mol Al₂O₃, which is 45 s at a voltage of 12 volts. The XRD results that the crystallite size of 92% mol SnO₂ + 8% mol Al₂O₃ is 43.67 nm smaller than 100% SnO₂ is 57.74 nm.