Polyhedral Zn₂SnO₄: Synthesis, enhanced gas sensing and photocatalytic performance

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• 作者：Qinqin Zhao^aAuthor Vitae ; Dianxing Ju^bAuthor Vitae ; Xiufeng Song^cAuthor Vitae ; Xiaolong Deng^aAuthor Vitae ; Meng Ding^aAuthor Vitae ; Xijin Xu^a ; ^{sps_xuxj@ujn.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Haibo Zeng^c ; ^{zeng.haibo@njust.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Zn2SnO4 ; Octahedral architectures ; Gas sensor ; Photocatalysis
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：28 June 2016
• 年：2016
• 卷：229
• 期：Complete
• 页码：627-634
• 全文大小：3371 K

文摘

Polyhedral Zn₂SnO₄ (ZTO) have been successfully fabricated with a facile hydrothermal method. Their morphologies, gas sensing and photocatalytic properties were carefully studied. The morphologies were found to be dependent on the growth time. Morphologies achieved include cubes and octahedrons with the reaction time of 16 h and 36 h. A plausible mechanism for the formation of octahedral ZTO microstructure was proposed. The gas sensing properties of triethylamine (TEA) for ZTO microstructures showed that the sensor response (S = R_a/R_g) reach to be 37 at 100 ppm, which is much larger than the previous reports. Furthermore, the detection limit can be down to 5 ppm-level with a response value about 11 at 200 °C. For the photocatalytic performance, the octahedral ZTO structures (24 h) exhibited faster photocatalytic degradation efficiency toward methylene blue (MB) than others (16 h and 36 h) which can be ascribed to their specific octahedral structures.