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May 28, 2026Chemical Engineering Journal1 citationsOpen Access

Dual sulfur-specific pathways in ag-sensitized Cr2O3 Nanoarchitectures for robust H2S discrimination in complex gas mixtures

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JCJae Han ChungDADo Yeong AnWCWoo-Seok Choi

Key Points

  • This research aims to develop Ag-sensitized Cr2O3 nanoarchitectures for effective H2S detection.
  • Fabricated Ag-sensitized Cr2O3 nanoarchitectures using GLAD.
  • Evaluated the response to H2S in various gas mixtures.
  • Conducted in-situ Raman spectroscopy and XPS to confirm sulfur pathways.
  • Achieved a maximum response of 107.2 to 10 ppm H2S, a 7.2-fold increase compared to bare Cr2O3.
  • Showed robust detection of H2S in 15 complex mixtures with a low cross-sensitivity (S < 2.83).
  • Identified dual sulfur pathways involving AgxO-to-AgxS conversion and Cr2O3 surface sulfidation.

Abstract

• Fabrication of Ag-sensitized Cr 2 O 3 nanoarchitectures via GLAD. • Maximum response of 107.2 to 10 ppm H 2 S, 7.2-fold higher than bare Cr 2 O 3 . • Robust H 2 S detection in 15 mixtures ( S > 100) with low cross-sensitivity ( S < 2.83). • Dual sulfur pathways: Ag x O-to-Ag x S conversion and Cr 2 O 3 surface sulfidation. • In-situ Raman and XPS confirm sulfur-driven pathways and HAL collapse.

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Cite This Study

Chung et al. (2026) studied this question.

synapsesocial.com/papers/6a17da9b3fad632b0f9d7a12https://doi.org/10.1016/j.cej.2026.177723
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