Ultra-sensitive UV and H2S dual functional sensors based on porous In2O3 nanoparticles operated at room temperature

Zhijie Li, Shengnan Yan, Shouchao Zhang, Junqiang Wang, Wenzhong Shen, Zhiguo Wang, Yong Qing Fu

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
9 Downloads (Pure)

Abstract

A dual functional sensor for detecting both UV light and H 2S gas was fabricated using the hexagonal phase porous In 2O 3 nanoparticles, which were prepared using the hydrothermal and calcination process. The porous In 2O 3 nanoparticles with large surface areas and pore volumes could provide plenty of active sites to produce much active oxygen species, which were beneficial for the UV light and H 2S gas sensing reactions, thus resulting in a good sensing performance. At room temperature, the dual functional sensor based on porous In 2O 3 nanoparticles exhibited ultra-high responses for sensing both UV light (with a wavelength of 365 nm) and H 2S gas. As a UV sensor, its response was 12886.0 for a UV power intensity of 1.287 mW/cm 2 and its detection limit was 0.013 mW/cm 2. As a H 2S gas sensor, the sensor exhibited an ultra-high response (26268.5–1 ppm H 2S) and a very low detection limit (1 ppb of H 2S), and it also have excellent selectivity, reversibility and stability.

Original languageEnglish
Pages (from-to)721-731
Number of pages11
JournalJournal of Alloys and Compounds
Volume770
Early online date21 Aug 2018
DOIs
Publication statusPublished - 5 Jan 2019

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