Prediction of band edge potentials and reaction products in photocatalytic copper and iron sulfides

Fuentes, Juan Pablo; Jadoun, Sapana; Yepsen, Orlando; Mansilla, Héctor D.; Yáñez, Jorge

doi:10.1007/s43630-023-00415-3

Cited by 6 publications

(2 citation statements)

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“…The calculated band gap for the synthesized ZnO photocatalyst was 3.19 eV, Figure S3b. Theoretically, ZnO exhibits a valence band potential of +2.7 eV and a conduction band potential of −0.5 eV . This energy band configuration involves the generation of reactive oxygen species (ROS) within the band gap of ZnO, which could aid in the degradation of MB.…”

Section: Resultsmentioning

confidence: 99%

“…Theoretically, ZnO exhibits a valence band potential of +2.7 eV and a conduction band potential of −0.5 eV. 35 This energy band configuration involves the generation of reactive oxygen species (ROS) within the band gap of ZnO, which could aid in the degradation of MB. For an illustration of potential ROS production and the band gap location of ZnO, 36 see Figure 14.…”

Section: Characterization Of the Photocatalyst 311 Optical Characteri...mentioning

confidence: 99%

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Assessment of the Raceway Pond Reactor for Degradation of Methylene Blue Dye in Different Types of Water: A Systematic Kinetics Study under Natural Solar Light

Jadoun

2024

ACS EST Water

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The Atacama Desert (AD), known for its extreme aridity and abundant solar irradiance, presents an opportunity for innovative solar-based environmental research. Raceway pond reactors (RPRs), characterized by their shallow, circular design, offer a scalable solution for pollutant degradation in aqueous environments, known for their versatility and eco-friendliness. This study explores the effectiveness of RPRs under the intense solar radiation of the AD in degrading Methylene blue (MB) dye across different water types: deionized water (DW), tap water (TW), and seawater (SW) with natural pH levels of 5.7, 7.1, and 8.5, respectively. Zinc oxide (ZnO) synthesized via the sol−gel method was used as the photocatalyst with average crystallite size 42.38 and 80.14 nm determined by the Scherrer and the Williamson−Hall equations, respectively. Results demonstrate the successful removal of 100%, 98.54%, and 84.64% of 20 mg/L of MB dye using 0.4 g/L ZnO photocatalysts in 10 L of DW, TW, and SW, respectively. Kinetic analysis favors a pseudo-first-order model, and the degradation order follows DW > TW > SW based on pseudo-first-order constants (0.03902, 0.03217, and 0.00969 min −1 ), highlighting the potential of solar energy and RPRs for environmental remediation in sun-rich regions.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of the Photocatalyst 311 Optical Characteri...mentioning

confidence: 99%