Detection of mixed BTEX with suppressed reaction specificity using tin oxide nanoparticles functionalized by multi-metalloporphyrins

Byeonghwa Cho, Kyounghoon Lee, Eunhwan Jo, Jongbaeg Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Typical BTEX sensors that exhibit different response for individual BTEX were difficult to accurately measure the amount of mixed BTEX with an arbitrary ratio and thus a calibration was required for accurate concentration measurement. Herein we demonstrated a BTEX (benzene, toluene, ethylbenzene, and xylene) sensor using tin oxide nanoparticles (SnO2 NPs) functionalized by multi-metalloporphyrin (MMPP) as sensing materials. The SnO2 NP/MMPP-based BTEX sensor platform was fabricated by using scalable processes based on micromachining technology and solution-based SnO2 NPs/MMPP deposition. Our SnO2 NP/MMPP-based BTEX sensor exhibits suppressed response specificity for individual BTEX, unlike the previously studied BTEX sensors which exhibited different responses to each gas. Therefore, the BTEX sensor does not need parameters such as 'response factor' or 'correlation factor' to calibrate. Moreover, the amount of mixed BTEX gas with an arbitrary concentration ratio can be detected with a small response error. The BTEX sensors also showed reliable responses with an error of less than 9% at the same concentration for each BTEX compound and mixed BTEX.

Original languageEnglish
Article number8832247
Pages (from-to)11791-11796
Number of pages6
JournalIEEE Sensors Journal
Issue number24
Publication statusPublished - 2019 Dec 15

Bibliographical note

Funding Information:
Manuscript received July 5, 2019; accepted August 9, 2019. Date of publication September 11, 2019; date of current version November 26, 2019. This work was supported in part by the Ministry of Trade, Industry and Energy (MOTIE), South Korea, through the Industrial Technology Innovation Program “Development of bi-functional smart sensor for detection and filtering of hazardous gases” under Grant 10070075 and in part by the National Research Foundation of Korea (NRF) through the Ministry of Science and ICT (MSIT), Korean Government, under Grant NRF-2018R1A2A1A05023070. The associate editor coordinating the review of this article and approving it for publication was Dr. Chirasree Roychaudhuri. (Corresponding author: Jongbaeg Kim.) The authors are with the School of Mechanical Engineering, Yonsei University, Seoul 03722, South Korea (e-mail:;;; Digital Object Identifier 10.1109/JSEN.2019.2940455

Publisher Copyright:
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All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering


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