Synthesis of Co 3 O 4 /TiO 2 composite by pyrolyzing ZIF-67 for detection of xylene

Shouli Bai, Ke Tian, Ye Tian, Jun Guo, Yongjun Feng, Ruixian Luo, Dianqing Li, Aifan Chen, Chung Chiun Liu

研究成果: 雜誌貢獻期刊論文同行評審

56 引文 斯高帕斯(Scopus)


Co 3 O 4 /TiO 2 composites with p–n heterojunction have been successfully prepared by pyrolyzing sacrificial template of Ti ion loaded Co-based Zeolitic imidazolate framework (ZIF-67). The structure and morphology of composite have been characterized by means of the analysis of XRD, FESEM, HRTEM and XPS spectra. The composite with a Co/Ti molar ratio of 4:1 exhibits the maximum sensing response of 6.17–50 ppm xylene, which is 5 times higher than pristine Co 3 O 4 . Moreover, Co 3 O 4 /TiO 2 composite also shows good selectivity, long–term stability and rapid response and recovery. Such excellent sensing performances are attributed to material porous structure, high specific surface and the formation of abundant p–n heterojunction that permits the gas adsorption, diffusion and surface reaction and then improve the gas sensing performance. This work develops a promising synthesized approach of metal oxide composites for broader MOFs application in gas sensor field.

頁(從 - 到)384-392
期刊Applied Surface Science
出版狀態已出版 - 30 3月 2018


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