Synthesis and gas sensing properties of hierarchical meso-macroporous SnO₂ for detection of indoor air pollutants

详细信息	查看全文 | 推荐本文 |

• 作者：Huihua Li^a ; ^b  ; [Author Vitae] ; Fanli Meng^a ; ^{flmeng@iim.ac.cn}  ; [Author Vitae] ; Jinyun Liu^a  ; [Author Vitae] ; Yufeng Sun^a ; ^c  ; [Author Vitae] ; Zhen Jin^a  ; [Author Vitae] ; Lingtao Kong^a  ; [Author Vitae] ; Yanjiao Hu^d  ; [Author Vitae] ; Jinhuai Liu^a ; ^{jhliu@iim.ac.cn}  ; [Author Vitae]
• 关键词：Meso-macroporous ; Hierarchical structure ; SnO2 ; Carbonaceous sphere ; Indoor air pollutant
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：20 May, 2012
• 卷：166-167
• 期：Complete
• 页码：519-525
• 文件大小：1398 K

摘要

Hierarchical meso-macroporous SnO₂ was synthesized by a sol-gel process using carbonaceous spheres as sacrificial templates. The morphology of meso-macroporous structures can be controlled by adjusting the sintering temperature. Compared with the traditional SnO₂, the hierarchical meso-macroporous SnO₂ exhibited higher gas response and shorter response and recovery times in detecting indoor air pollutants including ethanol, benzene and toluene. With regard to the gas sensing property, mesopores provide plenty of active sites for surface chemical reactions, on the one hand. On the other hand, the gas diffusion in the sensing film can be improved by macropores greatly. The morphology and structures were characterized by field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and Brunauer-Emmett-Teller (BET) respectively.