In this work, mesoporous In 2 O 3 nanorods composed of many small well-aligned crystal nanostructures have been fabricated by a simple sol−gel process, with block copolymer PE6800 as a soft template controlling their morphology. The effects of the experimental parameters such as the concentration of PE6800, the dosage of InCl 3 ·4H 2 O, reaction temperature, and pH values were investigated by a series of experiments. The as-synthesized mesoporous In 2 O 3 nanorods showed excellent gas-sensing properties to C 2 H 5 OH in terms of sensor response and selectivity.
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Li et al. (2009) studied this question.
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