Trimethylamine (TMA), a representative volatile gas characterized by a strong, pungent odor, is widely recognized as an indicator for assessing fish freshness according to international standards. Despite its importance, the development of TMA sensors that offer high sensitivity, rapid response kinetics, selectivity, and operation at low temperatures remains a significant challenge. In this study, a highly sensitive In2S3/In2O3 gas‐sensing material with porous rod‐like structures for TMA detection was designed via an in situ sulfurization process. The sulfurization state of In2O3 was precisely controlled by adjusting the amount of thioacetamide. Gas sensing investigations reveal that sulfur incorporation markedly enhances sensor performance. The In2S3/In2O3 sensor, with an S/In molar ratio of 1/3, exhibited superior TMA sensing performance at 150°C, including the highest response (2.17 to 0.1 ppm and 8.17 to 10 ppm), rapid response/recovery times, excellent selectivity, and a low detection limit (0.05 ppm). Additionally, the sensor demonstrated good reproducibility and long‐term stability, highlighting its significant potential for applications in monitoring the freshness and quality of seafood.

Dan Meng

Yubo Pan

Lei Zhang

Yue Zhang

Chun He

Kai Tao

Size Li

Xiaoguang San

ChemNanoMat

CHEMNANOMAT是与ANGEWANDTE CHEMIE和ADVANCED MATERIALS团队密切合作出版的新期刊，是CHEMISTRY—AN ASIAN JOURNAL的新姊妹期刊。

CHEMNANO MAT is a new journal published in close collaboration with the teams of ANGEWANDTE CHEMIE and ADVANCED MATERIALS, and it serves as a sister journal to CHEMISTRY—AN ASIAN JOURNAL.

CHEMNANO MAT 是与 ANEWANDTE CHEMIE 和 ADVANCED MATERIALS 团队密切合作出版的新期刊，也是 CHEMISTRY—AN ASIAN JOURNAL 的姊妹期刊。

Category	Quartile
材料科学	4
材料科学, 化学综合	4
材料科学, 材料科学综合	4
材料科学, 纳米科技	4

Hierarchical porous rod‐like In2S3/In2O3 structures for trimethylamine detection

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Journal Info

Category	Quartile
NANOSCIENCE & NANOTECHNOLOGY	3