Formation of a nanorod-assembled TiO2 actinomorphic-flower-like microsphere film via ta doping using a facile solution immersion method for humidity sensing

Mamat, Mohamad Hafiz and Mohamed Zahidi, Musa and A Subki, A Shamsul Rahimi and Abdullah, Mohd Hanapiah and Hassan, Hamizura and Ahmad, Mohd Khairul and Abu Bakar, Suriani and Mohamed, Azmi and Ohtani, Bunsho (2023) Formation of a nanorod-assembled TiO2 actinomorphic-flower-like microsphere film via ta doping using a facile solution immersion method for humidity sensing. Nanomaterials, 13 (2). p. 256. ISSN 2079-4991

[img] Text
0234802052024105551798.PDF
Download (10MB)

Abstract

This study fabricated tantalum (Ta)-doped titanium dioxide with a unique nanorod-assembled actinomorphic-flower-like microsphere structured film. The Ta-doped TiO2actinomorphic-flower-like microsphere (TAFM) was fabricated via the solution immersion method in a Schott bottle with a home-made improvised clamp. The samples were characterised using FESEM, HRTEM, XRD, Raman, XPS, and Hall effect measurements for their structural and electrical properties. Compared to the undoped sample, the rutile-phased TAFM sample had finer nanorods with an average 42 nm diameter assembled to form microsphere-like structures. It also had higher oxygen vacancy sites, electron concentration, and mobility. In addition, a reversed double-beam photoacoustic spectroscopy measurement was performed for TAFM, revealing that the sample had a high electron trap density of up to 2.5 µmolg−1. The TAFM showed promising results when employed as the resistive-type sensing film for a humidity sensor, with the highest sensor response of 53,909% obtained at 3 at.% Ta doping. Adding rGO to 3 at.% TAFM further improved the sensor response to 232,152%.

Item Type: Article
Uncontrolled Keywords: Semiconductors, Sol-gel preparation, TiO2 nanostructure, Ta doping, Structural, Sensors
Divisions: Faculty of Electrical and Electronic Engineering Technology
Depositing User: Norfaradilla Idayu Ab. Ghafar
Date Deposited: 11 Jul 2024 09:38
Last Modified: 11 Jul 2024 09:38
URI: http://eprints.utem.edu.my/id/eprint/27460
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item