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Ultrasonic-Assisted Synthesis of a Zn(II) Coordination Polymer in Aqueous Media and Its High-Performance Luminescent Sensing for 2,4,6-Trinitrophenol
摘要： A novel Zn(II) coordination polymer based on 5-(3-pyridyl)-1,3,4-oxadiazole-2-thiol (Hpzt), namely [Zn(pzt)2]n or (Zn-CP), was synthesized by two different synthetic methods. The bulk polycrystals and single-crystals of Zn-CP were obtained by the conventional solvothermal method at 90°C. The Zn-CP exhibits a two-dimensional (2D) coordination network that contains the uncoordinated Lewis basic sites within each layer. Interestingly, a simple environmentally friendly sonochemical synthesis of the Zn-CP in an aqueous media could be performed at room temperature. The optimal synthetic conditions were studied. The uniform microplates of Zn-CP were obtained within 30 min with the addition of pyridine, acting as a sized modulator and a deprotonating reagent. The influence of the amount of the modulator and the sonication time on their crystalline size was investigated. Moreover, the Zn-CP suspension in an ethanolic media has been used as a luminescence sensor for the detection of nitroaromatic compounds. It shows highly selective and sensitive sensing of 2,4,6-trinitrophenol (TNP) through the quenching (turn off) process under the UV light. Also, the Zn-CP microplates show the higher dispersibility and more stable suspension than those of bulk products causing an increase of the luminescent sensing performance for TNP.
关键词： 2,sonochemical synthesis,4,Zn(II),Coordination polymer,luminescence,6-trinitrophenol
更新于2025-11-19 16:46:39
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Surfactant assisted sonochemical synthesis of zinc tungstate nanoparticles: Anode for Li-ion battery and photocatalytic activities
摘要： Herein, we report a simple, economic and low-cost surfactant assisted sonochemical synthesis of ZnWO4 nanoparticles. The structural and morphological features of nanoparticles were characterized by X-ray di?raction (XRD), Fourier transform infrared (FTIR) spectroscopy, UV-visible spectroscopy, photoluminescence (PL) spectroscopy and transmission electron microscopy. ZnWO4 had been proven to be one of the most promising electrodes for energy storage and found that the discharge capacity was of 173 mA h g?1 even after 20 cycles at 0.1C rate. In addition to this, good photocatalytic degradation e?ciency (98.6% in 120 minutes) was also achieved through Rhodamine B as a model of pollutant system.
关键词： photocatalytic activities,Rhodamine B,sonochemical synthesis,Li-ion battery,ZnWO4 nanoparticles
更新于2025-09-23 15:19:57
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Sonochemical synthesis of a 2D–2D MoSe <sub/>2</sub> /graphene nanohybrid electrode material for asymmetric supercapacitors
摘要： Molybdenum selenide (MoSe2) nanosheets are prepared by a simple and facile sonochemical route. To optimize the synthesis process, the sonication is tested at three different time durations (15, 30 and 45 min) with a constant power of 500 W. In order to improve the electrochemical performance of the exfoliated MoSe2 nanosheets, we report the hybridization of 2D-MoSe2 with 2D-graphene by a simple solvothermal method. The exfoliated MoSe2 nanosheets are perpendicularly oriented on the surface of the graphene nanosheets. These MoSe2 nanosheet edges have a large number of electrochemically active sites, and the graphene sheets provide effective mass transportation of ions at the electrode–electrolyte interface. Cyclic voltammetry reveals the pseudocapacitive behaviour of a MoSe2/graphene nanohybrid based electrode. From galvanostatic charge–discharge studies, the specific capacitance is found to be 945 F g?1 at a current density of 1 A g?1. An asymmetric supercapacitor (ASC) device is fabricated, which delivers a specific capacitance of 75 F g?1 (@1 A g?1) with an energy density of 26.6 W h kg?1 and a power density of 0.8 kW kg?1, and it retains 88% of its capacitance even after 3000 cycles.
关键词： MoSe2,asymmetric supercapacitor,sonochemical synthesis,graphene,nanohybrid,electrochemical performance
更新于2025-09-19 17:15:36
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A Study on Photocatalytic Behaviors of Activated Carbon Fibers Impregnated with N-Doped Titania
摘要： Activated carbon ?bers (ACFs) impregnated with N-doped titania were prepared via the sol–gel method and sonochemical synthesis. The photocatalytic behavior of rhodamine B showed that N-doped TiO2/ACF nanocomposites exhibited enhanced photocatalytic activity. This result could be attributed to the synergistic effect between the high adsorption capacity of ACF and the visible light photocatalytic activity of N-doped TiO2. In particular, the N-doped TiO2/ACF nanocomposite that was sonicated four times had the highest photocatalytic ef?ciency and degradation rate, owing to the optimal N-doped TiO2 loading and nanocomposite pore structure.
关键词： N-doped TiO2,Sonochemical Synthesis,Activated Carbon Fibers,Photodegradation
更新于2025-09-04 15:30:14