Heterojunction Based on Rh-Decorated WO3 Nanorods for Morphological Change and Gas Sensor Application Using the Transition Effect

Young Geun Song, Jae Yeol Park, Jun Min Suh, Young Seok Shim, Seung Yeop Yi, Ho Won Jang, Sangtae Kim, Jong Min Yuk, Byeong Kwon Ju, Chong Yun Kang

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

The use of heterojunctions based on Rh-decorated WO3 nanorods is an effective strategy for achieving high-performance gas sensors for volatile organic compounds (VOCs), especially acetone (CH3COCH3). Herein, we successfully fabricated Rh-decorated WO3 nanorods with one-dimensional (1D) structures by glancing angle deposition (GLAD). Interestingly, morphological changes characterized by anomalous surfaces with numerous regions of negative curvature were observed upon decoration of the bare WO3 nanorods with Rh, which were systematically investigated on the basis of impeded surface diffusion and trapping effects. The improvements of gas sensing properties were stepwisely demonstrated by synergistic effects involving transition of Rh, high chemical potential of the negative curvature, primary decomposition at the top side, and highly ordered nanostructures. We are confident that the results provide new insight into the synthesis of effective nanostructures and contribute to a variety of applications including battery, solar water splitting, and sensor devices.

Original languageEnglish
Pages (from-to)207-215
Number of pages9
JournalChemistry of Materials
Volume31
Issue number1
DOIs
Publication statusPublished - 2019 Jan 8

Bibliographical note

Funding Information:
This work was supported by an Institute for Information & Communications Technology Promotion (IITP) grant funded by the Korea government (MSIP; Ministry of Science, ICT & Future Planning) (No. 2015-0-0031, Olfactory Bio Databased Emotion Enhancement Interactive Content Technology Development) and a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP; Ministry of Science, ICT & Future Planning) (NRF-2018H1A2A1060105-Global Ph.D. Fellowship Program, NRF-2018R1C1B6002624 and NRF-2018M3A7B4065625).

Publisher Copyright:
© 2018 American Chemical Society.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry

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