Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts: Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue

Małgorzata Nadolska; Mariusz Szkoda; Konrad Trzciński; Paweł Niedziałkowski; Jacek Ryl; Aleksandra Mielewczyk-Gryń; Karolina Górnicka; Marta Prześniak-Welenc

doi:10.1021/acs.inorgchem.2c00136

Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts: Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue

Małgorzata Nadolska
, Mariusz Szkoda
, Konrad Trzciński
, Paweł Niedziałkowski
, Jacek Ryl
, Aleksandra Mielewczyk-Gryń
, Karolina Górnicka
, Marta Prześniak-Welenc

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Photocatalysis is regarded as a promising tool for wastewater remediation. In recent years, many studies have focused on investigating novel photocatalysts driven by visible light. In this study, K₂V₆O₁₆·nH₂O nanobelts and KV₃O₈microplatelets were synthesized and investigated as photocatalysts. Samples were obtained via the facile method based on liquid-phase exfoliation with ion exchange. By changing the synthesis temperature (20-80 °C), different compositions, morphologies, and V⁴⁺/V⁵⁺ratios were obtained and investigated as photocatalysts for organic dye degradation. Potassium vanadates' structural, morphological, and optical properties were characterized using X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Physical Property Measurement System (PPMS), thermogravimetric analysis (TGA) with mass spectrometry (MS), N₂adsorption, scanning electron microscopy (SEM), photoluminescence (PL), and UV-vis diffuse reflectance spectroscopy (DRS). Synthesized K₂V₆O₁₆·nH₂O and KV₃O₈showed an efficient absorption in the visible wavelength region with a narrow band gap energy of 1.80 and 1.91 eV, respectively. Their photocatalytic activity was evaluated by the degradation of methylene blue (MB) under simulated solar light illumination. The KV₃O₈microplatelets exhibited the greatest photocatalytic activity, resulting in more than 90% degradation of the dye within the first 30 min. It is suggested that the observed excellent photocatalytic performance is attributed to the high content of V⁴⁺species. Furthermore, the influence of active species was investigated, and the mechanism responsible for the photodegradation of the MB dye was discussed for the first time for potassium vanadates.

Original language	English
Pages (from-to)	9433-9444
Number of pages	12
Journal	Inorganic Chemistry
Volume	61
Issue number	25
DOIs	https://doi.org/10.1021/acs.inorgchem.2c00136
State	Published - Jun 27 2022
Externally published	Yes

Funding

The authors would like to acknowledge Professor M. Sawczak from The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences for PL and UV–VIS enabling measurements. This work is supported by the National Science Center of Poland (Grant 2020/37/N/ST5/03697). The authors also acknowledge the financial support from Gdańsk University of Technology by the DEC-3/2020/IDUB/I.3.3 grant under the Argentum-″Excellence Initiative-Research University″ and the National Centre for Research and Development via Grant LIDER/15/0088/L-10/18/NCBR/2019 (Integrated prototype of a photo-supercapacitor for energy storage obtained as a result of solar radiation conversion).

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10.1021/acs.inorgchem.2c00136

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Nadolska, M., Szkoda, M., Trzciński, K., Niedziałkowski, P., Ryl, J., Mielewczyk-Gryń, A., Górnicka, K., & Prześniak-Welenc, M. (2022). Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts: Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue. Inorganic Chemistry, 61(25), 9433-9444. https://doi.org/10.1021/acs.inorgchem.2c00136

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title = "Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts: Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue",

abstract = "Photocatalysis is regarded as a promising tool for wastewater remediation. In recent years, many studies have focused on investigating novel photocatalysts driven by visible light. In this study, K2V6O16·nH2O nanobelts and KV3O8microplatelets were synthesized and investigated as photocatalysts. Samples were obtained via the facile method based on liquid-phase exfoliation with ion exchange. By changing the synthesis temperature (20-80 °C), different compositions, morphologies, and V4+/V5+ratios were obtained and investigated as photocatalysts for organic dye degradation. Potassium vanadates' structural, morphological, and optical properties were characterized using X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Physical Property Measurement System (PPMS), thermogravimetric analysis (TGA) with mass spectrometry (MS), N2adsorption, scanning electron microscopy (SEM), photoluminescence (PL), and UV-vis diffuse reflectance spectroscopy (DRS). Synthesized K2V6O16·nH2O and KV3O8showed an efficient absorption in the visible wavelength region with a narrow band gap energy of 1.80 and 1.91 eV, respectively. Their photocatalytic activity was evaluated by the degradation of methylene blue (MB) under simulated solar light illumination. The KV3O8microplatelets exhibited the greatest photocatalytic activity, resulting in more than 90\% degradation of the dye within the first 30 min. It is suggested that the observed excellent photocatalytic performance is attributed to the high content of V4+species. Furthermore, the influence of active species was investigated, and the mechanism responsible for the photodegradation of the MB dye was discussed for the first time for potassium vanadates.",

author = "Ma{\l}gorzata Nadolska and Mariusz Szkoda and Konrad Trzci{\'n}ski and Pawe{\l} Niedzia{\l}kowski and Jacek Ryl and Aleksandra Mielewczyk-Gry{\'n} and Karolina G{\'o}rnicka and Marta Prze{\'s}niak-Welenc",

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doi = "10.1021/acs.inorgchem.2c00136",

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Nadolska, M, Szkoda, M, Trzciński, K, Niedziałkowski, P, Ryl, J, Mielewczyk-Gryń, A, Górnicka, K & Prześniak-Welenc, M 2022, 'Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts: Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue', Inorganic Chemistry, vol. 61, no. 25, pp. 9433-9444. https://doi.org/10.1021/acs.inorgchem.2c00136

TY - JOUR

T1 - Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts

T2 - Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue

AU - Nadolska, Małgorzata

AU - Szkoda, Mariusz

AU - Trzciński, Konrad

AU - Niedziałkowski, Paweł

AU - Ryl, Jacek

AU - Mielewczyk-Gryń, Aleksandra

AU - Górnicka, Karolina

AU - Prześniak-Welenc, Marta

PY - 2022/6/27

Y1 - 2022/6/27

N2 - Photocatalysis is regarded as a promising tool for wastewater remediation. In recent years, many studies have focused on investigating novel photocatalysts driven by visible light. In this study, K2V6O16·nH2O nanobelts and KV3O8microplatelets were synthesized and investigated as photocatalysts. Samples were obtained via the facile method based on liquid-phase exfoliation with ion exchange. By changing the synthesis temperature (20-80 °C), different compositions, morphologies, and V4+/V5+ratios were obtained and investigated as photocatalysts for organic dye degradation. Potassium vanadates' structural, morphological, and optical properties were characterized using X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Physical Property Measurement System (PPMS), thermogravimetric analysis (TGA) with mass spectrometry (MS), N2adsorption, scanning electron microscopy (SEM), photoluminescence (PL), and UV-vis diffuse reflectance spectroscopy (DRS). Synthesized K2V6O16·nH2O and KV3O8showed an efficient absorption in the visible wavelength region with a narrow band gap energy of 1.80 and 1.91 eV, respectively. Their photocatalytic activity was evaluated by the degradation of methylene blue (MB) under simulated solar light illumination. The KV3O8microplatelets exhibited the greatest photocatalytic activity, resulting in more than 90% degradation of the dye within the first 30 min. It is suggested that the observed excellent photocatalytic performance is attributed to the high content of V4+species. Furthermore, the influence of active species was investigated, and the mechanism responsible for the photodegradation of the MB dye was discussed for the first time for potassium vanadates.

AB - Photocatalysis is regarded as a promising tool for wastewater remediation. In recent years, many studies have focused on investigating novel photocatalysts driven by visible light. In this study, K2V6O16·nH2O nanobelts and KV3O8microplatelets were synthesized and investigated as photocatalysts. Samples were obtained via the facile method based on liquid-phase exfoliation with ion exchange. By changing the synthesis temperature (20-80 °C), different compositions, morphologies, and V4+/V5+ratios were obtained and investigated as photocatalysts for organic dye degradation. Potassium vanadates' structural, morphological, and optical properties were characterized using X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Physical Property Measurement System (PPMS), thermogravimetric analysis (TGA) with mass spectrometry (MS), N2adsorption, scanning electron microscopy (SEM), photoluminescence (PL), and UV-vis diffuse reflectance spectroscopy (DRS). Synthesized K2V6O16·nH2O and KV3O8showed an efficient absorption in the visible wavelength region with a narrow band gap energy of 1.80 and 1.91 eV, respectively. Their photocatalytic activity was evaluated by the degradation of methylene blue (MB) under simulated solar light illumination. The KV3O8microplatelets exhibited the greatest photocatalytic activity, resulting in more than 90% degradation of the dye within the first 30 min. It is suggested that the observed excellent photocatalytic performance is attributed to the high content of V4+species. Furthermore, the influence of active species was investigated, and the mechanism responsible for the photodegradation of the MB dye was discussed for the first time for potassium vanadates.

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ER -

Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts: Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue

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