Design of Cr2O3@ZnO Hetero-junction Hierarchical Nanostructures with Enhanced Xylene-sensing Properties

doi:10.1007/s40242-018-7237-8

Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (2): 169-174.doi: 10.1007/s40242-018-7237-8

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Design of Cr₂O₃@ZnO Hetero-junction Hierarchical Nanostructures with Enhanced Xylene-sensing Properties

QIN Qixuan, SHEN Zheng, ZHANG Nan, ZHANG Xindong

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China

Received:2017-07-11 Revised:2017-12-31 Online:2018-04-01 Published:2018-03-12
Contact: ZHANG Xindong,E-mail:xindong@jlu.edu.cn E-mail:xindong@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.11574110), the Project of Science and Technology Development Plan of Jilin Province, China(No.20160204013GX), the Project of Statistic Analysis of Gas Sensitive Materials, China, the Opened Fund of the State Key Laboratory on Applied Optics and the Opened Fund of the State Key Laboratory on Integrated Optoelectronics of China(No.IOSKL2013KF10).

Abstract

Abstract: Cr₂O₃@ZnO hetero-junction hierarchical nanostructures were designed to be enhanced xylene sensing material, and thereinto, flower-like ZnO hierarchical nanostructures were synthesized via a solution-based method, and then Cr₂O₃ particles were developed on the surface of ZnO petals via a solvothermal method. From the results of XRD patterns, SEM and TEM images, it can be observed that ZnO has a high-quallity crystallinity and Cr₂O₃ particles scatter uniformly on the suruface of ZnO. The products with different ratios of Cr₂O₃ were used to fabricate gas sensors, and the result indicates that the hetero-junction structures prompt the response to xylene, and the reason may be attributed to the decrease of main carriers concentration caused by the p-n junction between ZnO(n-type semiconductor) and Cr₂O₃(p-type semiconductor), as well as the catalytic oxidation effect on methyl groups of the xylene by Cr₂O₃.

Key words: ZnO, Hetero-junction, Xylene

QIN Qixuan, SHEN Zheng, ZHANG Nan, ZHANG Xindong. Design of Cr₂O₃@ZnO Hetero-junction Hierarchical Nanostructures with Enhanced Xylene-sensing Properties[J]. Chemical Research in Chinese Universities, 2018, 34(2): 169-174.

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Design of Cr₂O₃@ZnO Hetero-junction Hierarchical Nanostructures with Enhanced Xylene-sensing Properties

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