4.5 Article

Improved photocatalytic degradation of rhodamine B by g-C3N4 loaded BiVO4 nanocomposites

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HELIYON
卷 9, 期 11, 页码 -

出版社

CELL PRESS
DOI: 10.1016/j.heliyon.2023.e21900

关键词

BiVO4; Binary composite; Photocatalysis; Wastewater treatment; Emerging contaminants

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Photocatalytic degradation of toxic dyes in wastewater can be efficiently achieved using graphitic nitride (g-C3N4) loaded BiVO4 nanocomposites. The 10 wt% g-C3N4@BiVO4 hybrid exhibits the highest catalytic activity and stability, making it a promising catalyst for pollutant degradation.
Photocatalytic degradation has emerged as one of the most efficient methods to eliminate toxic dyes from wastewater. In this context, graphitic nitride (g-C3N4) loaded BiVO4 nanocomposites (5 wt% g-CN@BiVO4 and 10 wt% g-CN@BiVO4) have been fabricated by the wet impregnation method, and their efficiency towards photocatalytic removal of rhodamine B have been investigated under visible light irradiation. These hybrid composites have been characterized by XRD, FESEM, HRTEM, EDS-mapping, UV-Vis DRS, DLS, XPS and BET, etc. The HRTEM images revealed that BiVO4 has a decagonal shape covered by a layered nanosheet-like structure of g-C3N4. BET measurements suggest increasing the proportion of g-C3N4 results enhancement of the specific surface area. Among different photocatalysts, the 10 wt% g-C3N4@BiVO4 hybrid possesses the best catalytic activity with 86% degradation efficiency after 60 min of reaction time. The LC-MS studies suggest that the degradation reactions follow the de-ethylation pathway. Even after five cycles, the heterostructure shows only a 14% decrease in photocatalytic activity, confirming its stability. As a result, the binary composite can be regarded as a promising catalyst for the degradation of pollutants due to its ease of preparation, high stability and superior catalytic activity.

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