- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Sonochemical synthesis and high-efficient solar-light-driven photocatalytic activity of novel Cobalt and Manganese codoped Tungsten oxide nanoparticles
摘要： This work presents a new approach to preparation of Co/Mn- W3O8 nanoparticles via facile sonochemical route. Cobalt and manganese codoped tungsten oxide (W3O8) nanoparticles was studied as a photocatalyst for the removal of amaranth under solar light irradiation (λmax 520 nm). The results indicated that the Co/Mn-W3O8 composite photocatalyst showed higher photocatalytic activity the single element doped and pure W3O8. Moreover, the stability of Co/Mn- W3O8 was tested using recycling experiments. It is suggested that the band gap energy difference between the Co/Mn-W3O8 and W3O8 accelerates the separation of photogenerated electron-hole pairs, dominating the enhanced photocatalytic activity.
关键词： Sonochemical,Co/Mn-W3O8 nanoparticles,solar light,pollutants
更新于2025-09-10 09:29:36
-
Synthesis and physical properties of un- and Zn-doped Ag2S nanoparticles
摘要： This study is devoted to the sonochemical synthesis of un- and Zn-doped silver sulfide (Ag2S) nanostructures and evaluation of the parameters that affect its structural, morphological and optical properties. To unravel any changes in the characteristics of the particles, the XRD and FESEM techniques, in addition to photoluminescence (PL), Raman and UV–Vis spectroscopies, were applied. According to the analyses, 15 min sonication using 200 W power can provide the highest quality of the Ag2S crystals. Moreover, it was found out that Zn doping shifts the XRD peaks of Ag2S to higher angles and declines crystallinity of the samples while it does not change the spherical shape of the Ag2S particles. The other impact of Zn presence in the crystal lattice of Ag2S was declared to be increasing the size of the Ag2S nanostructures. Importantly, based on the PL results, the un- and Zn-doped Ag2S particles present several emission bands lying in the visible spectrum of light due to their specific optical near band emission (NBE) and crystal defects. As the PL spectra demonstrated, increasing the Zn concentration decreases the optical band gap energy of the Ag2S nanostructures. Also, the Raman results unraveled the impact of synthesis conditions on the optical and crystalline properties of the grown structures.
关键词： Zn-doped,Optical properties,Sonochemical,Ag2S nanostructures,Synthesis parameters
更新于2025-09-10 09:29:36
-
Al-doped Ag2S nanostructures: ultrasonic synthesis and physical properties
摘要： Un- and aluminum (Al)-doped silver sulfide (Ag2S) nanostructures were grown by the sonochemical method. The samples were studied by employing various identification methods including X-ray diffraction (XRD), field emission electron microscopy (FESEM), photoluminescence (PL), Raman and UV-Visible. The results showed that adding Al dopant shifts the diffraction peaks to higher angles and reduces their intensity. Furthermore, the size of the nanocrystal was reduced compared to the undoped sample. It was found that the strain in the doped samples is greater than the un-doped sample by the use of Hall-Williamson (W-H) method. FESEM images demonstrate the composition of spherical forms of nanostructures, which is converted to a quadrilateral shape by adding dopant. PL analysis illustrated the presence of emission bands in the visible region that was resulted by the emission of the near band edge (NBE), as well as the percentage of the density and type of defects. Moreover, Al reduced the optical energy band gap of the nanostructures. Finally, the influence of the parameters affecting the crystalline and the optical properties of the material over the growth process was investigated using Raman analysis.
关键词： Al-doped Ag2S nanostructures,Structural features,Sonochemical,Optical properties
更新于2025-09-04 15:30:14
-
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