Laser-Patterned Porous Carbon/ZnO Nanostructure Composites for Selective Room-Temperature Sensing of Volatile Organic Compounds
Wang H, Jimenéz-Calvo P, Hepp M, Isaacs MA, Ogolla CO, Below-Lutz I, Butz B, Strauss V (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 6
Pages Range: 966-975
Journal Issue: 2
Abstract
The development of mobile, noninvasive, and portable sensor technologies for diagnostics and emission control is highly demanded. For that purpose, laser carbonization is studied as a tool to produce responsive carbon materials from inexpensive organic precursors for the room-temperature selective detection of volatile organic compounds (VOCs) applicable in future sensor array-based devices. To increase the response of intrinsically low-responsive laser-patterned carbons (LP-C) to analytes in the gas phase, we tested carbonization in the presence of nanoscale ZnO precursors in primary inks. Following the addition of a zinc salt, Zn(NO3)2, a noticeable 43-fold increase in the sensor response (ΔR/R0 = -21.5% toward 2.5% acetone) was achieved. This effect is explained by a significant increase in the measurable surface area up to ∼700 m2·g-1 due to the carbothermic reduction supported by the in situ formation of ZnO nanoparticles. Varying Zn concentrations or the addition of as-prepared ZnO nanorods lead to different surface properties like the surface area, porosity, and polarity of LP-C. A predominant effect of the surface polarity on the selectivity toward different analytes of the sensors during physisorption, e.g., acetone vs toluene, was identified and tested. The best-performing LP-C sensors were finely characterized by transmission/scanning electron microscopies and X-ray photoelectron/energy-dispersive X-ray/Raman spectroscopies.
Authors with CRIS profile
Involved external institutions
Universität Siegen
Germany (DE)
Research Complex at Harwell (RCaH)
United Kingdom (GB)
Max-Planck-Institut für Kolloid- und Grenzflächenforschung / Max Planck Institute of Colloids and Interfaces
Germany (DE)
Germany (DE)
Research Complex at Harwell (RCaH)
United Kingdom (GB)
Max-Planck-Institut für Kolloid- und Grenzflächenforschung / Max Planck Institute of Colloids and Interfaces
Germany (DE)
How to cite
APA:
Wang, H., Jimenéz-Calvo, P., Hepp, M., Isaacs, M.A., Ogolla, C.O., Below-Lutz, I.,... Strauss, V. (2023). Laser-Patterned Porous Carbon/ZnO Nanostructure Composites for Selective Room-Temperature Sensing of Volatile Organic Compounds. ACS Applied Nano Materials, 6(2), 966-975. https://dx.doi.org/10.1021/acsanm.2c04348
MLA:
Wang, Huize, et al. "Laser-Patterned Porous Carbon/ZnO Nanostructure Composites for Selective Room-Temperature Sensing of Volatile Organic Compounds." ACS Applied Nano Materials 6.2 (2023): 966-975.
BibTeX: Download