Photocatalysis has emerged as a promising environmental remediation strategy due to its ability to harness solar energy for the degradation of hazardous pollutants. In this study, the photocatalytic degradation of ammonium dinitramide (ADN), a high-energy oxidizer widely used in aerospace and weaponry applications, was investigated using a newly developed Bi2WO6/g-C3N4 (BWO/CN) heterostructure nanosheet system synthesized via a one-step in-situ hydrothermal method. The performance of the catalyst was systematically optimized by varying key operational parameters such as initial ADN concentration, catalyst dosage, initial pH, temperature, and the addition of hydrogen peroxide as a green oxidizer. Under optimal conditions, the BWO/CN composite achieved a remarkable 98.93% degradation efficiency of ADN within 80 minutes under visible-light irradiation. The material demonstrated excellent stability and reusability over multiple cycles, confirming its practical potential for industrial wastewater treatment. Moreover, nitrate ions were identified as the primary degradation product, indicating a clean and efficient mineralization pathway.
The enhanced photocatalytic activity of the BWO/CN composite is attributed to the formation of an S-scheme heterojunction, which facilitates highly efficient charge separation and transfer. This mechanism enables the retention of powerful reducing electrons in the conduction band of g-C3N4 and strong oxidizing holes in the valence band of Bi2WO6, thereby significantly enhancing redox capability. Characterization techniques including XRD, FT-IR, SEM, TEM, XPS, PL spectroscopy, transient photocurrent response, and EIS analysis collectively confirmed the successful construction of the ultrathin heterostructure with intimate interfacial contact.p38 Antibody supplier The synergistic effect between Bi2WO6 and g-C3N4 was further validated through kinetic studies, showing that the reaction rate constant of BWO/CN was approximately 44 times higher than that of pure g-C3N4 and nearly 12 times higher than that of physical mixture BWO + CN.MMAB Antibody supplier Active species capture experiments and electron paramagnetic resonance (EPR) results clearly indicated that superoxide radicals (O₂⁻), holes (h⁺), and hydroxyl radicals (OH•) are the dominant reactive species responsible for ADN degradation.PMID:35126820 Based on these findings, a plausible degradation pathway was proposed: ADN first dissociates into NH₄⁺ and [N(NO₂)₂]⁻ ions, followed by oxidative attack on the dinitramide anion by photogenerated carriers, leading to stepwise decomposition and eventual conversion into nitrate ions. The development of this S-scheme BWO/CN heterostructure presents a significant advancement in visible-light-driven photocatalysis for the treatment of recalcitrant energetic pollutants, offering both high efficiency and environmental sustainability.MedChemExpress (MCE) offers a wide range of high-quality research chemicals and biochemicals (novel life-science reagents, reference compounds and natural compounds) for scientific use. We have professionally experienced and friendly staff to meet your needs. We are a competent and trustworthy partner for your research and scientific projects.Related websites: https://www.medchemexpress.com