Karakterisasi Arus-Tegangan Sensor Gas Hidrogen dari Bahan Semikonduktor Heterokontak SnO2/TiO2 (Na2CO3)

Authors

  • Yulita Yulita Laboratorium Fisika Material, Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Andalas
  • Elvaswer Elvaswer Laboratorium Fisika Material, Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.7.4.386-392.2018

Abstract

Telah dilakukan karakterisasi sensor gas hidrogen berupa pelet heterokontak antara 100% mol SnO2 dengan TiO2 didoping dengan 0% mol, 2% mol, 4% mol, 6% mol, 8% mol, dan 10% mol Na2CO3. Proses pembuatan sensor gas hidrogen diawali dengan pencampuran bahan, kalsinasi pada temperatur 500°C selama 4 jam, penggerusan, kompaksi, dan sintering pada temperatur 700°C selama 4 jam dengan menggunakan metode dalam keadaan padat. Sensor gas hidrogen diuji pada temperatur ruang dengan pengukuran karakteristik I-V, nilai sensitivitas, konduktivitas, selektivitas, waktu respon, dan karakterisasi XRD. Berdasarkan pengukuran karakteristik I-V menunjukkan bahwa bahan dengan komposisi SnO2/TiO2 (2% mol Na2CO3) memiliki sensitivitas tertinggi yaitu 5pada tegangan operasional 6 Volt. Nilai selektivitas tertinggi terdapat pada bahan dengan komposisi SnO2/TiO2 (2% mol Na2CO3) yaitu 3,5 pada tegangan operasional 18 V. Nilai konduktivitas tertinggi terdapat pada bahan dengan komposisiSnO2/TiO2 (2% mol Na2CO3)  yaitu 6,01 x 10-3 / Ωm pada lingkungan hidrogen. Waktu respon  bahan dengan komposisi SnO2/TiO2 (2% mol Na2CO3) pada gas hidrogen yaitu 39 sekon dan untuk gas oksigen yaitu 42 sekon pada tegangan operasional 6 V. Hasil XRD menunjukkan bahwa bahan dengan komposisi SnO2/TiO2 didoping dengan Na2CO3 mempunyai ukuran kristal antara 113,131 nm- 141,615 nm. Campuran TiO2 didoping Na2CO3 telah terbentuk senyawa baru yaitu Na4TiO4.

Kata kunci : sensor, gas hidrogen, heterokontak, sensitivitas, waktu respon

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Published

2018-10-01

Issue

Vol. 7 No. 4 (2018)

Section

Articles

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Copyright (c) 2018 Yulita Yulita, Elvaswer Elvaswer

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