Effects of Liquid Medium and Ablation Wavelength on the Properties of Cadmium Sulfide Nanoparticles Formed by Pulsed-Laser Ablation.
Pulsed-laser ablation in liquid (PLAL) is a green synthesis technique to obtain semiconductor nanomaterials in colloidal form. Herein, cadmium sulfide (CdS) nanoparticles were synthesized by the pulsed-laser ablation of a CdS target in different liquid media by using λ=532 and 1064 nm outputs from a pulsed (10 ns, 10 Hz) Nd:YAG laser at different ablation fluence values. The morphology, structure, crystalline phase, elemental composition, optical, and luminescent properties of CdS nanomaterials were analyzed by using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV/Vis absorption spectroscopy, and fluorescence spectroscopy. By changing the liquid medium and ablation wavelength, CdS nanoparticles with different morphology and size were formed, as demonstrated by using TEM analysis. The crystallinity and chemical states of the ablation products were confirmed by using XRD and XPS analyses. The optical bandgap of the CdS nanoparticles was dependent on the ablation wavelength and the fluence. These nanocolloids presented different green emissions, which implied the presence of several emission centers. CdS nanocolloids in distilled water catalyzed the photocatalytic decay of methylene blue dye under light irradiation from a solar simulator.
Facultad de Ingeniería Mecánica y Eléctrica, Institution Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, 66455, México.|CIIDIT, Universidad Autónoma de Nuevo León, Apodaca, Nuevo León, México.
Grisel
G
García Guillén
Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd. Universitaria, San Nicolas de los Garza, Nuevo León, 66455, México.
Veronica Anahi
VA
Zuñiga Ibarra
Centro de Investigación en Materiales Avanzados (CIMAV) Monterrey, PIIT, Apodaca, Nuevo León, México.
Maria Isabel
MI
Mendivil Palma
Facultad de Ingeniería Mecánica y Eléctrica, Institution Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, 66455, México.|CIIDIT, Universidad Autónoma de Nuevo León, Apodaca, Nuevo León, México.
Bindu
B
Krishnan
Facultad de Ingeniería Mecánica y Eléctrica, Institution Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, 66455, México.|CIIDIT, Universidad Autónoma de Nuevo León, Apodaca, Nuevo León, México.
David
D
Avellaneda Avellaneda
Facultad de Ingeniería Mecánica y Eléctrica, Institution Universidad Autónoma de Nuevo León, Av. Universidad s/n, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, 66455, México.|CIIDIT, Universidad Autónoma de Nuevo León, Apodaca, Nuevo León, México.
Sadasivan
S
Shaji
luminescence; nanoparticles; photocatalysis; photoelectron spectroscopy; semiconductors