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Effects of alcohol addition on decay of sonoluminescence intensity
摘要： The observation of multibubble sonoluminescence (MBSL) during acoustic cavitational bubble collapse is known to be an appropriate approach to obtain physicochemical information about high-temperature and high-pressure sites generated under sonication. MBSL spectra observed when ultrasound is irradiated to Ar-saturated water can be classified into two categories; a continuum spectrum fraction over a wide range of wavelengths, and a clear peak located at around 310 nm, which is assignable to OH. So far, temporal changes in MBSL spectra have been reported in the presence of alcohols, which scavenge radicals generated in the sonochemical reaction [1]. The spectral changes are presumed to be due to gaseous products generated by the ultrasound decomposition of alcohols. The present study was carried out to investigate the correlation between spectral changes and the products of the sonochemical reaction including hydrogen peroxide and gaseous products from alcohols.
关键词： Gaseous product,Hydrogen peroxide,Sonochemistry,Alcohol addition,Sonoluminescence
更新于2025-11-19 16:51:07
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Dual metal oxide loaded cotton/polyester fabric with photo, bio and magnetic properties
摘要： This research aimed at sonochemical synthesis and deposition of Fe3O4/ZnO nanocomposites on cotton/polyester fabric using the ultrasonic bath at 80°C. For this purpose, in situ sonosynthesis of magnetite nanoparticles on the fabric surface was carried out and followed by the generation of crystalline ZnO nanoparticles through the sonochemical approach, eliminating the need for high temperature after-treatment of the fabrics. This effect was achieved thanks to the shock waves formed by the cavitation bubbles also called microcalcination, resulting in the formation and adsorption of crystalline nanomaterials on the fabric surface. Magnetic properties with saturation magnetization of 1.5 emu/g, self-cleaning activities toward methylene blue discoloration, and excellent antibacterial and antifungal properties along with low cell toxicity were among the obtained properties. The current study is the first research indicating the potential of the sonochemical method to produce non-toxic cotton/polyester fabric with various properties including magnetic, photocatalytic, and antibacterial activities.
关键词： antibacterial,Fe3O4/ZnO nanocomposites,magnetic,self-cleaning,sonochemistry
更新于2025-09-23 15:22:29
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Preparation of amine functionalized g-C3N4@H/SMOF NCs with visible light photocatalytic characteristic for 4-nitrophenol degradation from aqueous solution
摘要： At ambience temperature, a facile and large-scale sonochemical synthesis route was used to synthesize graphitic carbon nitride@[Ti4C24H39N3O29] metal-organic framework nanocomposites (g-C3N4-X@YTi-MIL125-NH2 NCs, where X and Y stood for the weight percentages of g?C3N4 and the synthesis method of Ti-MIL125-NH2, respectively) having 2-Amino-1,4-benzenedicarboxylic acid (2-ATA) ligand with amine functional free groups. The obtained NCs were characterized by FT-IR, PXRD, FE-SEM, BET, UV-DRS, PL, EIS, and zeta potential. Moreover, g-C3N4-X@YTi-MIL125-NH2 capability to eliminate 4-nitrophenol (4-NP) contaminant from water via visible light illumination was explored. Our synthesized NCs under a facile, green ultrasonic technique (i.e. g-C3N4-30@STi-MIL125-NH2) had a higher percentage of degradation than those from hydrothermal technique (i.e. g-C3N4-30@HTi-MIL125-NH2) with degradation percentages of 75% and 57%, respectively, which resulted in effective mass transfer and separation of photo?generated charge carriers. Additionally, this higher percentage of degradation could be attributed to the larger surface area and unique morphology of the ultrasonically synthesized particles with higher homogeneity and better and non-agglomerated distribution. Furthermore, excellent reusability and stability were observed for g-C3N4-30@STi-MIL125-NH2. We also explored the role of some scavengers in the degradation procedures to investigate the effect of active species. The experimental results were used to describe the suggested mechanism capability for improved photocatalysis.
关键词： Sonochemistry,Photocatalytic degradation,4-Nitrophenol,Metal-organic Framework,g-C3N4@Ti-MIL125-NH2 NCs
更新于2025-09-10 09:29:36