| Title: | Graphene Oxide Thin Films for Detection and Quantification of Industrially Relevant Alcohols and Acetic Acid |
| Author(s): | Moura PC; Pivetta TP; Vassilenko V; Ribeiro PA; Raposo M; |
| Address: | "Laboratory for Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-NOVA), Department of Physics, NOVA School of Science and Technology, NOVA University of Lisbon, Campus FCT-NOVA, 2829-516 Caparica, Portugal" |
| ISSN/ISBN: | 1424-8220 (Electronic) 1424-8220 (Linking) |
| Abstract: | "Industrial environments are frequently composed of potentially toxic and hazardous compounds. Volatile organic compounds (VOCs) are one of the most concerning categories of analytes commonly existent in the indoor air of factories' facilities. The sources of VOCs in the industrial context are abundant and a vast range of human health conditions and pathologies are known to be caused by both short- and long-term exposures. Hence, accurate and rapid detection, identification, and quantification of VOCs in industrial environments are mandatory issues. This work demonstrates that graphene oxide (GO) thin films can be used to distinguish acetic acid, ethanol, isopropanol, and methanol, major analytes for the field of industrial air quality, using the electronic nose concept based on impedance spectra measurements. The data were treated by principal component analysis. The sensor consists of polyethyleneimine (PEI) and GO layer-by-layer films deposited on ceramic supports coated with gold interdigitated electrodes. The electrical characterization of this sensor in the presence of the VOCs allows the identification of acetic acid in the concentration range from 24 to 120 ppm, and of ethanol, isopropanol, and methanol in a concentration range from 18 to 90 ppm, respectively. Moreover, the results allows the quantification of acetic acid, ethanol, and isopropanol concentrations with sensitivity values of (3.03+/-0.12) *104, (-1.15+/-0.19) *104, and (-1.1+/-0.50) *104 mL(-1), respectively. The resolution of this sensor to detect the different analytes is lower than 0.04 ppm, which means it is an interesting sensor for use as an electronic nose for the detection of VOCs" |
| Keywords: | Humans *Acetic Acid Methanol 2-Propanol Ethanol *Volatile Organic Compounds/analysis Voc acetic acid air quality electronic nose impedance spectroscopy indoor air industrial environment isopropanol layer-by-layer films volatile organic compounds; |
| Notes: | "MedlineMoura, Pedro Catalao Pivetta, Thais Priscilla Vassilenko, Valentina Ribeiro, Paulo Antonio Raposo, Maria eng PD/BDE/150627/2020/Fundacao para a Ciencia e Tecnologia/ PTDC/FIS-NAN/0909/2014/Fundacao para a Ciencia e Tecnologia/ UIDB/04559/2020/Fundacao para a Ciencia e Tecnologia/ UIDP/04559/2020/Fundacao para a Ciencia e Tecnologia/ Switzerland 2023/01/09 Sensors (Basel). 2023 Jan 1; 23(1):462. doi: 10.3390/s23010462" |
