Karakterisasi Sensor TiO2 Didoping ZnO untuk Mendeteksi Gas Oksigen

Authors

  • Wahyuni Putri Jurusan Fisika FMIPA Universitas Andalas
  • Elvaswer Elvaswer Jurusan Fisika FMIPA Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.5.2.122-130.2016

Abstract

Telah dilakukan karakterisasi sensor gas oksigen berupa pelet dengan bahan utama TiO2 didoping dengan ZnO. Pelet sensor gas oksigen dibuat dengan variasi doping ZnO (0% mol, 2% mol,4% mol, 6%mol, 8% mol, dan 10% mol) terhadap bahan utama TiO2. Proses pembuatan sensor gas oksigen diawali dengan pencampuran bahan TiO2 didoping ZnO, kalsinasi pada temperatur 800 ºC selama 4 jam, penggerusan, kompaksi, dan sintering pada temperatur 900 ºC selama 4 jam. Sensor gas oksigen diuji pada temperatur ruang (30 ºC) dengan melihat karakteristik I-V, nilai sensitivitas, nilai konduktivitas, waktu respon, dan karakterisasi XRD. Berdasarkan pengukuran krakteristik I-V bahwa sampel dengan penambahan bahan ZnO sebanyak 8% mol memiliki sensitivitas tertinggi dibanding sampel lainnya yaitu 2,46 pada tegangan 3 volt dan sampel yang memiliki konduktivitas tertinggi terdapat pada sampel dengan penambahan ZnO terbanyak yaitu 10% mol dengan nilai konduktivitas di lingkungan udara sebesar 7,33 x 10-3 Ω-1m-1 dan nilai konduktivitas di lingkungan oksigen sebesar 11,79 x 10-3 Ω-1m-1. Waktu respon sampel 92% mol TiO2 + 8% ZnO pada tegangan 3 volt adalah 55 s. Hasil XRD menunjukkan ukuran kristal 92% mol TiO2 + 8% mol ZnO lebih besar dibandingkan dengan bahan TiO2 murni. Pada doping TiO2 + 8% ZnO telah terbentuk senyawa baru berupa Zn2TiO4.

Kata kunci : karakterisasi I-V, konduktivitas, sensor gas oksigen,sensitivitas, TiO2(ZnO),waktu respon.

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Published

2016-04-01

How to Cite

Putri, W., & Elvaswer, E. (2016). Karakterisasi Sensor TiO2 Didoping ZnO untuk Mendeteksi Gas Oksigen. Jurnal Fisika Unand, 5(2), 122–130. https://doi.org/10.25077/jfu.5.2.122-130.2016

Issue

Vol. 5 No. 2 (2016)

Section

Articles

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Copyright (c) 2016 Wahyuni Putri, Elvaswer Elvaswer

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