The photocatalytic degradation of methylene blue (MB) dye has been performed under UV irradiation in aqueous suspension, employing photocatalysts based on Au (1.5 wt %) and AuCu (Au/Cu = 1, 2.0 wt %), and supported on SBA-15-ordered mesoporous silica, with and without titania (Si/Ti = 3), in order to evaluate the versatility of this mesoporous support in this type of reaction of great impact from the environmental point of view. Samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N₂ adsorption-desorption at -196 °C, and X-ray photoelectron spectroscopy (XPS), so as to study their structural, optical, and chemical properties. All the prepared catalysts were found to be active in the test reaction. The bimetallic AuCu-based catalysts attained very high MB degradation values, in particular AuCu/SBA-15 titania-silica sample reached 100% of dye oxidation after the monitored reaction period (120 min).
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6025472 | PMC |
| http://dx.doi.org/10.3390/ma11060890 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Metal nanoparticles entrapment in chitosan-carbon black composite hydrogel towards sustainable environmental solutions.
Int J Biol Macromol
January 2025
Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional (UNITEN), 43000, Selangor, Malaysia.
A catalytic system has been developed, utilizing metal nanoparticles confined within a chitosan‑carbon black composite hydrogel (M-CH/CB), aimed at improving ease of use and recovery in catalytic processes. The M-CH/CBs were characterized by XRD, SEM, and EDX, the M-CH/CB system demonstrated exceptional catalytic activity in producing hydrogen gas (H) from water and methanol, and in reducing several hazardous materials including 2-nitrophenol (2-NP), 4-nitrophenol (4-NP), 2,6-dinitrophenol (2,6-DNP), acridine orange (ArO), methyl orange (MO), congo red (CR), methylene blue (MB), and potassium ferricyanide (PFC). Among the tested nanocatalysts, CH/CB showed the highest efficiency for H₂ production, while Fe-CH/CB excelled in contaminant reduction (7.
View Article and Find Full Text PDFEvaluating the efficacy of cavity disinfection using methylene blue dye with 660-nm diode laser on primary molars: An in vivo study.
J Indian Soc Pedod Prev Dent
October 2024
Department of Pediatric and Preventive Dentistry, Maratha Mandal's Nathajirao G. Halgekar Institute of Dental Sciences and Research Centre, Belagavi, Karnataka, India.
Background And Objectives: The purpose of this study was to evaluate the antimicrobial activity of methylene blue dye with 660-nm diode laser in cavity disinfection and to compare the total bacterial count in dentinal samples preexcavation, postexcavation, and postdisinfection. The study design was experimental in vivo.
Materials And Methods: Fifteen children aged 5-12 years with 15 primary molars requiring atraumatic restorative treatment (ART) were selected.
Para-aminopropiophenone toxicity in domestic dogs: a description of non-target toxicosis in Victoria, Australia: 13 dogs (2016-2023).
Aust Vet J
January 2025
Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia.
Background: PAPP is widely used in Australia as a potent vertebrate bait, with potential for off-target ingestion and poisoning in domestic dogs. Whilst toxicosis and resulting methaemoglobinaemia is anecdotally known to occur, this is the first description in the literature. This study reports thirteen clinical cases of suspected Para-aminopropiophenone (PAPP) toxicity in dogs, with the aim of describing clinical presentation and current management of toxicosis in this species.
View Article and Find Full Text PDFA Simple One-Pot Method for the Synthesis of BiFeO/BiFeO Heterojunction for High-Performance Photocatalytic Degradation Applications.
Int J Mol Sci
December 2024
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China.
This study presents a facile one-pot synthesis method to fabricate BiFeO-BiFeO-BiO heterojunction photocatalysts with controllable compositions and pure phases. Three different binary heterojunctions (BiFeO/BiFeO, BiFeO/BiO, and BiFeO/BiO) and a ternary BiFeO/BiFeO/BiO heterojunction were formed, all exhibiting significantly enhanced photocatalytic performance for the degradation of methylene blue (MB) and phenol under visible light irradiation, outperforming the individual compositions. Notably, the BiFeO/BiFeO heterojunction achieved the highest degradation efficiency (93.
View Article and Find Full Text PDFDye Adsorbent from Natural Rubber Latex Foam: Efficiency and Post-Utilization.
Polymers (Basel)
January 2025
Department of Rubber Technology and Polymer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Pattani 94000, Thailand.
This study examined the feasibility of using natural rubber (NR) latex foam as a dye adsorbent and antibacterial foam. The dyes used in this experiment were Methylene Blue (MB) and Alizarin Yellow (AY). Foams with that optimum density were further evaluated for adsorption isotherm, kinetics, and thermodynamic data.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!