Core-shell TiO2/ZnO nanorod array films on FTO: Two-step synthesis and improved ethanol sensing performance

被引：14

作者：

An, Xiangli ^{[1
,2
]}

Zhang, Bowen ^{[1
,2
]}

Wang, Chongyang ^{[1
,2
]}

Zhao, Zhiyong ^{[1
,2
]}

Zhang, Saisai ^{[1
,2
]}

Bala, Hari ^{[1
,2
]}

Zhang, Zhanying ^{[1
,2
]}

机构：

[1] Henan Polytech Univ, Sch Mat Sci & Engn, Jiaozuo 454000, Peoples R China

[2] Henan Polytech Univ, Cultivating Base Key Lab Environm friendly Inorga, Jiaozuo 454000, Peoples R China

来源：

JOURNAL OF MATERIOMICS | 2023年 / 9卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Core-shell structure; TiO2; ZnO; Nanorod arrays; Heterojunction; GAS SENSOR; WORK FUNCTION; FABRICATION; NANOWIRES;

D O I：

10.1016/j.jmat.2023.01.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, highly regular TiO2 nanorod array films were synthesized in situ on FTO by a facile hy-drothermal method, and then ZnO shell layers were grown on the surface of the nanorods to form a core-shell structure via an ion-layer adsorption-reaction way. Compared to the TiO2 nanorods, the prepared TiO2/ZnO nanocomposites exhibited enhanced ethanol sensing performances, including a low working temperature, higher sensitivity, and faster response capability. The optimum sensor based on 2c-TiO2/ ZnO exhibited the maximum response value of 30.85 toward 50 x 10-6 C2H5OH at 340 & DEG;C, which was almost 4.15 times higher than that of the TiO2 sensor. The improved ethanol sensing mechanism was discussed in relation to the unique nanorod array structure and the heterojunctions between TiO2 and ZnO.& COPY; 2023 The Authors. Published by Elsevier B.V. on behalf of The Chinese Ceramic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：725 / 734

页数：10

共 36 条

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