Synthesis and characterization of ZnS nanotubes with crossed-channels

Abstract

Nanotubos de ZnS em forma de X foram sintetizados usando um método hidrotérmico. Uma nova reação hidrotérmica envolvendo hidrólise e oxidação simultâneas do solvente foi desenvolvido usando zinco em pó, água e NH 2 CSNH 2 como reagentes. As imagens de microscopia de transmissão eletrônica mostram que cada segmento dos canais tem cerca de 400 a 500 nm de comprimento. O diâmetro interno é 50 nm e o externo 70 nm e o espaço entre as camadas é cerca de 7 nm. Dados de difração de raios (XRD) mostram que o nanotubo obtido apresenta boa cristalização na fase Esfalerita cúbica. A banda em 293 nm no espectro de absorção no ultravioleta-visível encontra-se deslocado para o azul em cerca de 50 mm em relação ao ZnS bulk. O espectro de fotoluminescência dos nanotubos de ZnS mostra que o pico de emissão ocorre em 409 nm quando excitado a 365 nm.ZnS nanotubes with crossed-channels have been synthesized successfully using a hydrothermal method. A novel hydrothermal reaction of simultaneous solvent-oxidationhydrolysis has been developed using Zn powder, H 2 O and NH 2 CSNH 2 as reagents. TEM images show that each branch of the channels is about 400-500 nm long. The inner diameter is 55 nm, the outer diameter is 70 nm, and the interlayer spacing is about 7 nm. XRD data show that the product is well-crystallized in the cubic Sphalerite phase. The peak appears at 293 nm in the UV-Vis absorption spectrum, which is about 50 nm blue shifted from the bulk counterpart. The photoluminescence spectrum of ZnS nanotubes shows that the emission peak occurs at 409 nm when excited at 365 nm.

Investigation on Zinc Sulphide Nanoparticles in Dye Sensitized Solar Cell

“…The ultraviolet-visible absorption spectra are recorded in the spectral range 200-900nm at room temperature in the absorption mode where the onset of absorption is at 295 nm (4.2 eV) for the case (A) and 297 nm (4.185 eV) for the case (B) which are blue shifted for nano ZnS when compared with bulk 346 nm (3.6 eV) of ZnS ( Fig. The similar trend was observed by Yun chen et al [1] and Borse et al [2]. This is due to quantum confinement of the excitons present in the sample resulting in a more discrete energy spectrum of the individual nanoparticles.…”

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

“…9,[24][25][26][27][28][29][30][31] In addition to these techniques, the preparation of ZnS via solution chemical routes provides a promising option for the large-scale production of this material. Therefore, it is important to develop new environmentally friendly processing material methods with low cost, and with the possibility of formation of nanoscale materials with phase control and well-defined morphologies.…”

“…In recent years, well-defined ZnS nanoparticles with various morphologies and structures, including nanotubes, nanorods, nanowires, nanocubes, nanospheres, nanoflowers and nanosheets, have been successfully synthesized and studied using a variety of methods. 9,[24][25][26][27][28][29][30][31] In addition to these techniques, the preparation of ZnS via solution chemical routes provides a promising option for the large-scale production of this material. Therefore, it is important to develop new environmentally friendly processing material methods with low cost, and with the possibility of formation of nanoscale materials with phase control and well-defined morphologies.…”

Zinc sulfide functionalized with ruthenium nanoparticles for photocatalytic reduction of CO2

“…XRD analysis, shown in Fig.1, proves the zinc blende structure (sphalerite) of both ZnS-A and ZnS-B materials (JCPDS No. 05-0566)[44]. Particle sizes calculated from XRD measurements (using the Scherrer's equation) are equal to 3.3 and 20.6 nm for ZnS-A and ZnS-B, respectively, as calculated basing on the most intense peak 2 = 28º.…”