Ultra-high sensitive RT CH4 gas sensing TiO2 was prepared by hydrothermal method.
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TiO2 nanostructures were annealed at various temperatures.
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M TiO2 nanoparticles transformed to nanorods after annealing at 700 °C.
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The sensing properties are annealing temperature dependent.
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Improved sensitivity to CH4 gas at RT was disclosed by 1.0 M-700 °C.
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