Abstract
A new composite material based on copper–benzene-1,3,5-tricarboxylate (Cu–BTC) deposited on boron nitride nanotubes (BNNTs) in a hydrothermal process were investigated for methane (CH4) sensing. The composite was characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The Cu–BTC deposited on the BNNTs had an average grain size of 80nm. The sensing performance of the as-grown product was studied for different concentrations of CH4 (20–200ppm) at 150°C. The results revealed that the Cu–BTC/BNNT composite exhibited high sensitivity and selectivity toward CH4. The good sensing performance of the composite was attributed to the high surface area and high affinity of Cu–BTC for CH4, which would allow the composite to act like a preconcentrator for CH4 gas sensing.
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