Pd-loaded SnO2 ultrathin nanorod-assembled hollow microspheres with the significant improvement for toluene detection
Pd-loaded SnO2 ultrathin nanorod-assembled hollow microspheres with the significant improvement for toluene detection
复制标题
负载Pd的SnO2超薄纳米棒组装空心微球对甲苯检测有显着改善
DOI：
10.1016/j.snb.2016.11.153
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Zheng Weitao
中科院分区：
文献类型：
--
作者：
Zhang Kan;Yang Xin;Wang Yanzhe;Bing Yifei;Qiao Liang;Liang Zhongzhu;Yu Shansheng;Zeng Yi;Zheng Weitao
通过简单的一锅水热法和随后的Pd负载处理，成功地制备了Pd负载SnO2中空微球，而不需要任何模板、表面活性剂或封顶剂。形貌和结构表征证实了Pd负载SnO2空心微球是由大量排列良好的棒状SnO2亚基和直径约为5-10 nm的单分散Pd颗粒组成的分级结构。随时间变化的研究表明，层状SnO2空心球的形成是由Ostwald熟化机制驱动的。在此基础上，制备了纯SnO2和Pd负载SnO2气敏元件。与纯SnO2相比，负载Pd的SnO2中空微球具有较低的操作温度、较高的甲苯响应和选择性。除了超薄纳米棒组装的中空和多孔结构的结构优点外，催化Pd颗粒对传感性能的提高也可以归功于催化Pd颗粒的贡献。
Pd-loaded SnO2hollow microspheres have been successfully prepared via a facile one-pot hydrothermal route and subsequent Pd-loaded treatment without involving any templates, surfactants, or capping agents. The morphological and structural characterization confirms that Pd-loaded SnO2hollow microspheres are hierarchically constructed of numerous well-aligned rodlike SnO2subunits with ultrathin diameter of about 5–10 nm and monodisperse Pd particles with several nanometers in size. The time-dependent investigation demonstrates that the formation of hierarchical SnO2hollow spheres is driven by Ostwald-ripening mechanism. Furthermore, gas sensors based on pure and Pd-loaded SnO2have been fabricated. The Pd-loaded SnO2hollow microspheres exhibit relatively lower operating temperature, higher response and selectivity to toluene in comparison with that of pure SnO2. Besides structural merits of ultrathin nanorod-assembled hollow and porous structure, the promotion of sensing performances can also be attributed to the contribution of catalytic Pd particles.