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

Xiangli An; Bowen Zhang; Chongyang Wang; Zhiyong Zhao; Saisai Zhang; Hari Bala; Zhanying Zhang

Journal of Materiomics (Jul 2023)

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

Xiangli An,
Bowen Zhang,
Chongyang Wang,
Zhiyong Zhao,
Saisai Zhang,
Hari Bala,
Zhanying Zhang

Affiliations

Xiangli An: School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China; Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo, 454000, China
Bowen Zhang: School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China; Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo, 454000, China; Corresponding author. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China.
Chongyang Wang: School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China; Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo, 454000, China
Zhiyong Zhao: School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China; Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo, 454000, China
Saisai Zhang: School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China; Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo, 454000, China; Corresponding author. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China.
Hari Bala: School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China; Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo, 454000, China
Zhanying Zhang: School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China; Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo, 454000, China

Journal volume & issue: Vol. 9, no. 4
pp. 725 – 734

Abstract

Read online

In this work, highly regular TiO2 nanorod array films were synthesized in situ on FTO by a facile hydrothermal 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 × 10−6 C2H5OH at 340 °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.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

About the journal

Abstract

Keywords