Investigation of WO<sub>3</sub> and BiVO<sub>4</sub> Photoanodes for Photoelectrochemical Sensing of Xylene, Toluene and Methanol
Volatile organic compounds (VOCs) are a notable group of indoor air pollutants released by household products. These substances are commonly employed as solvents in industrial operations, and some of them are recognized or suspected to be cancer-causing or mutagenic agents. Due to their high volatil...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/11/11/552 |
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| author | Milda Petruleviciene Irena Savickaja Jurga Juodkazyte Arunas Ramanavicius |
| author_facet | Milda Petruleviciene Irena Savickaja Jurga Juodkazyte Arunas Ramanavicius |
| author_sort | Milda Petruleviciene |
| collection | DOAJ |
| description | Volatile organic compounds (VOCs) are a notable group of indoor air pollutants released by household products. These substances are commonly employed as solvents in industrial operations, and some of them are recognized or suspected to be cancer-causing or mutagenic agents. Due to their high volatility, VOCs are typically present in surface waters at concentrations below a few micrograms per liter. However, in groundwater, their concentrations can reach levels up to thousands of times higher. This study analyses the applicability of the photoelectrochemical (PEC) sensing of VOCs in aqueous medium. Tungsten oxide and bismuth vanadate photoanodes were tested for PEC sensing of xylene, toluene, and methanol in sodium chloride and sodium sulfate electrolytes. The crystalline structure and morphology of coatings were analyzed using XRD and SEM analyses. Photoelectrochemical properties were evaluated using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. The results of the study show that aromatic compounds tend to block the surface of the photoelectrode and interfere with the PEC sensing of other substances. WO<sub>3</sub> photoanode is found to be suitable for the PEC sensing of methanol under the mild conditions in aqueous electrolytes; however, electrode engineering and assay optimization are required to achieve better detection limits. |
| first_indexed | 2024-03-09T16:55:54Z |
| format | Article |
| id | doaj.art-8efb888f51d14d0b993ffb6897fc1805 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-09T16:55:54Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-8efb888f51d14d0b993ffb6897fc18052023-11-24T14:35:34ZengMDPI AGChemosensors2227-90402023-11-01111155210.3390/chemosensors11110552Investigation of WO<sub>3</sub> and BiVO<sub>4</sub> Photoanodes for Photoelectrochemical Sensing of Xylene, Toluene and MethanolMilda Petruleviciene0Irena Savickaja1Jurga Juodkazyte2Arunas Ramanavicius3Centre for Physical Sciences and Technology, Sauletekio Av. 3, 10257 Vilnius, LithuaniaCentre for Physical Sciences and Technology, Sauletekio Av. 3, 10257 Vilnius, LithuaniaCentre for Physical Sciences and Technology, Sauletekio Av. 3, 10257 Vilnius, LithuaniaCentre for Physical Sciences and Technology, Sauletekio Av. 3, 10257 Vilnius, LithuaniaVolatile organic compounds (VOCs) are a notable group of indoor air pollutants released by household products. These substances are commonly employed as solvents in industrial operations, and some of them are recognized or suspected to be cancer-causing or mutagenic agents. Due to their high volatility, VOCs are typically present in surface waters at concentrations below a few micrograms per liter. However, in groundwater, their concentrations can reach levels up to thousands of times higher. This study analyses the applicability of the photoelectrochemical (PEC) sensing of VOCs in aqueous medium. Tungsten oxide and bismuth vanadate photoanodes were tested for PEC sensing of xylene, toluene, and methanol in sodium chloride and sodium sulfate electrolytes. The crystalline structure and morphology of coatings were analyzed using XRD and SEM analyses. Photoelectrochemical properties were evaluated using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. The results of the study show that aromatic compounds tend to block the surface of the photoelectrode and interfere with the PEC sensing of other substances. WO<sub>3</sub> photoanode is found to be suitable for the PEC sensing of methanol under the mild conditions in aqueous electrolytes; however, electrode engineering and assay optimization are required to achieve better detection limits.https://www.mdpi.com/2227-9040/11/11/552photoelectrochemistryvolatile organic compoundsphotoanodetungsten oxidebismuth vanadatedetection |
| spellingShingle | Milda Petruleviciene Irena Savickaja Jurga Juodkazyte Arunas Ramanavicius Investigation of WO<sub>3</sub> and BiVO<sub>4</sub> Photoanodes for Photoelectrochemical Sensing of Xylene, Toluene and Methanol Chemosensors photoelectrochemistry volatile organic compounds photoanode tungsten oxide bismuth vanadate detection |
| title | Investigation of WO<sub>3</sub> and BiVO<sub>4</sub> Photoanodes for Photoelectrochemical Sensing of Xylene, Toluene and Methanol |
| title_full | Investigation of WO<sub>3</sub> and BiVO<sub>4</sub> Photoanodes for Photoelectrochemical Sensing of Xylene, Toluene and Methanol |
| title_fullStr | Investigation of WO<sub>3</sub> and BiVO<sub>4</sub> Photoanodes for Photoelectrochemical Sensing of Xylene, Toluene and Methanol |
| title_full_unstemmed | Investigation of WO<sub>3</sub> and BiVO<sub>4</sub> Photoanodes for Photoelectrochemical Sensing of Xylene, Toluene and Methanol |
| title_short | Investigation of WO<sub>3</sub> and BiVO<sub>4</sub> Photoanodes for Photoelectrochemical Sensing of Xylene, Toluene and Methanol |
| title_sort | investigation of wo sub 3 sub and bivo sub 4 sub photoanodes for photoelectrochemical sensing of xylene toluene and methanol |
| topic | photoelectrochemistry volatile organic compounds photoanode tungsten oxide bismuth vanadate detection |
| url | https://www.mdpi.com/2227-9040/11/11/552 |
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