Abstract ZnO nanoflowers synthesized via a hydrothermal route were decorated with LaMnO3 perovskite oxide and the gas sensing performance was studied. The perovskite particles had a size of several to tens of nanometers, and were uniformly adhered to the smooth surface of ZnO nanoflowers. In comparison with the pristine ZnO sensor, 1 wt% LaMnO3 decoration led to significantly enhanced ethanol sensing performance. The response of the LaMnO3@ZnO sensor to ethanol gas was increased by 74% and the response time was reduced by ∼5 times. Moreover, lower optimal working temperature, higher sensitivity, much faster recovery speed, and improved ethanol selectivity were achieved. The greatly improved ethanol sensing performance of the LaMnO3@ZnO sensor may be ascribed to formation of p-n heterojunction and the excellent catalytic activity to oxygen reduction reaction of LaMnO3.

中文翻译：

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用 LaMnO 3 钙钛矿纳米颗粒装饰的 ZnO 纳米花增强乙醇气体传感性能

摘要 通过水热法合成的ZnO纳米花用LaMnO3钙钛矿氧化物装饰，并研究了其气敏性能。钙钛矿颗粒大小在几纳米到几十纳米之间，均匀地附着在 ZnO 纳米花的光滑表面上。与原始的 ZnO 传感器相比，1 wt% 的 LaMnO3 装饰显着增强了乙醇传感性能。LaMnO3@ZnO 传感器对乙醇气体的响应增加了 74%，响应时间减少了约 5 倍。此外，实现了更低的最佳工作温度、更高的灵敏度、更快的恢复速度和更高的乙醇选择性。