A formaldehyde sensor: Significant role of p-n heterojunction in gas-sensitive core-shell nanofibers

被引：108

作者：

Gao, Xing ^{[1
]}

Li, Feng ^{[1
]}

Wang, Rui ^{[1
]}

Zhang, Tong ^{[1
,2
]}

机构：

[1] Jilin Univ, State Key Lab Integrated Optoelect, Coll Elect Sci & Engn, Changchun 130012, Jilin, Peoples R China

[2] Chinese Acad Sci, State Key Lab Transducer Technol, Changchun 130012, Jilin, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 258卷

关键词：

Coaxial electrospinning; p-n heterojunction; Formaldehyde sensor; Core-shell nanofibers; SENSING PROPERTIES; HETEROSTRUCTURE NANOFIBERS; OXIDE NANOPARTICLES; LOW-TEMPERATURE; HOLLOW SPHERES; NANOWIRES; METAL; NANOSTRUCTURES; MECHANISM; NANOTUBES;

D O I：

10.1016/j.snb.2017.11.088

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The metal oxide semiconductor (MOS) core-shell heterostructure nanofibers (NFs) have been successfully fabricated via a facile and environmentally friendly coaxial electrospinning approach. In this work, p-type semiconductor Co3O4 and n-type semiconductor ZnO are chosen for the synthesis of the core-shell heterostructured NFs. The Co3O4-ZnO core-shell NFs show a normal p-type response to formaldehyde in spite of the n-type ZnO shell. This conversion of sensing behavior may attribute to the formation of p-n heterojunction. Additionally, Co3O4-ZnO core-shell NFs exhibits enhanced sensing performance including a high response to the target gas and rapid response/recover processes. A possible mechanism of the improved sensing abilities is also illustrated, which can provide theoretical guidance for the further development of advanced gas-sensitive NFs with p-n heterojunction. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：1230 / 1241

页数：12

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