Citation: QI Xiao-Jiao, WANG Qian, GAO Hai-Yan, LI Guo-Dong. Hollow Spindle-Shaped CuO/Cu2(OH)2CO3 Nanocomposites: Synthesis and Gas Sensing Property[J]. Chinese Journal of Inorganic Chemistry, ;2015, (5): 1010-1018. doi: 10.11862/CJIC.2015.129
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Hollow spindle-shaped CuO/Cu2(OH)2CO3 composites were fabricated via a templateless hydrothermal route with Cu2(OH)3NO3 as the precursor. XRD measurements and TEM observations reveal that the as-prepared CuO/Cu2(OH)2CO3 is hollow spindle-shaped with size of 1~2 μm. HRTEM image indicates that the shell of each particle is highly dispersive mixtures of nanoscale CuO and Cu2(OH)2CO3. Time dependent experiments disclose that the formation of hollow spindle-shaped CuO/Cu2(OH)2CO3 composites particles is driven by self-transformation and Ostwald ripening. The gas sensing performances were investigated with ethanol and acetone as the target gases. The as-prepared hollow CuO/Cu2(OH)2CO3 composites exhibit improved gas sensing properties in comparison with the commercial CuO powders, which can be ascribed to the decreased grain-to-grain contacts of the highly dispersive mixtures.
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