article · Journal of Taibah University for Science
A low-cost hydrothermal method enables the synthesis of a hybrid bismuth oxide and molybdenum diselenide nanocomposite for use as a photocatalyst. Structural analysis reveals that the resulting material possesses a mesoporous texture with slit-like pores and exhibits a surface area of 36.439 square metres per gramme, significantly larger than either individual component alone. When tested under visible light illumination, the hybrid material demonstrates superior performance in degrading methylene blue dye compared to pure bismuth oxide or pure molybdenum diselenide. The composite achieves a degradation efficiency of 96.5 percent within an exposure time of 80 minutes. This enhanced performance is linked to the composite material's small particle size, elevated surface area, and high crystallinity, demonstrating the effectiveness of combining these two compounds for pollutant breakdown.
Synthetic dyes released into water bodies present serious environmental and health hazards. Developing efficient, visible-light-driven materials to degrade these pollutants is crucial for cleaner industrial wastewater treatment. Demonstrating that a low-cost hydrothermal process can create effective composite materials with high degradation rates helps identify viable pathways for purifying contaminated water using solar or visible illumination.
The abstract points to applications in wastewater treatment, specifically the visible-light-driven breakdown of synthetic dye pollutants. Potential users include industrial effluent treatment operators, environmental remediation services, and textile processors. However, this work remains early-stage laboratory research, as performance has only been demonstrated on a single model dye in controlled settings without pilot-scale validation or continuous-flow testing.
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Herein, we demonstrate the sample and low coast hydrothermal synthesis of a nanocomposite of Bi2O3/MoSe2 for hybrid photocatalyst. The structure of as-synthesized samples was characterized by using several techniques, including XRD spectroscopy, Raman spectroscopy, XPS, SEM, BET, and UV-visible absorption spectroscopy. The nitrogen adsorption–desorption measurements show that the samples have a mesoporous texture with slits like pores. The Bi2O3/MoSe2 nanocomposite had BET surface areas of 36.439 m2/g, which were more than those of Bi2O3 (18.342 m2/g) and MoSe2 (12.923 m2/g). Under visible illumination, the photocatalytic activities of pure samples ( Bi2O3 and MoSe2) and the hybrid Bi2O3/MoSe2 sample for the disintegration of methylene blue were assessed. The results show that the Bi2O3/MoSe2 sample showed the highest photocatalytic degradation efficiency (i.e. 96.5% after an exposure time of 80 min). The increased photocatalytic activity is due to the mixed sample's high crystallinity and surface area, as well as the small particle size.
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DOI: 10.1080/16583655.2022.2161333
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