Handheld Device for Selective Benzene Sensing over Toluene and Xylene

© 2021 The Authors. Advanced Science published by Wiley-VCH GmbH..

More than 1 million workers are exposed routinely to carcinogenic benzene, contained in various consumer products (e.g., gasoline, rubbers, and dyes) and released from combustion of organics (e.g., tobacco). Despite strict limits (e.g., 50 parts per billion (ppb) in the European Union), routine monitoring of benzene is rarely done since low-cost sensors lack accuracy. This work presents a compact, battery-driven device that detects benzene in gas mixtures with unprecedented selectivity (>200) over inorganics, ketones, aldehydes, alcohols, and even challenging toluene and xylene. This can be attributed to strong Lewis acid sites on a packed bed of catalytic WO3 nanoparticles that prescreen a chemoresistive Pd/SnO2 sensor. That way, benzene is detected down to 13 ppb with superior robustness to relative humidity (RH, 10-80%), fulfilling the strictest legal limits. As proof of concept, benzene is quantified in indoor air in good agreement (R2 ≥ 0.94) with mass spectrometry. This device is readily applicable for personal exposure assessment and can assist the implementation of low-emission zones for sustainable environments.

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:9

Enthalten in:

Advanced science (Weinheim, Baden-Wurttemberg, Germany) - 9(2022), 4 vom: 14. Feb., Seite e2103853

Sprache:

Englisch

Beteiligte Personen:

Weber, Ines C [VerfasserIn]
Rüedi, Pascal [VerfasserIn]
Šot, Petr [VerfasserIn]
Güntner, Andreas T [VerfasserIn]
Pratsinis, Sotiris E [VerfasserIn]

Links:

Volltext

Themen:

Aromatics
Benzene sensing, electronics
Environmental
Gas sensors
Journal Article
Nanotechnology
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 14.02.2022

Date Revised 14.02.2022

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1002/advs.202103853

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM333746007