Asap 2020 plus nitrogen adsorption apparatus

Example 2

Characterizations of Bi₂S₃—CdS Nanospheres

The morphologies of Bi₂S₃—CdS nanospheres were examined by scanning electron microscopy (SEM, FEI INSPECT S50). The crystallinity and crystal phases of as-synthesized Bi₂S₃—CdS were studied by X-ray diffractometer (XRD Rigaku, Japan) measured with Cu-Kα radiation (λ=1.5418 Å) in the range of 10-80° with 1°/min scanning speed. UV-Vis diffuse reflectance spectrum of Bi₂S₃—CdS was recorded on a diffuse reflectance UV-Vis spectrophotometer (JASCO V-750). Micromeritics ASAP 2020 PLUS nitrogen adsorption apparatus (USA) was employed for BET surface area determination. Before analysis, samples were degassed at 180° C. Surface area was determined using N₂ adsorption data in the relative pressure (P/P₀) range of 0.05-0.3.

Example 3

Physical Characterization

The morphologies of the zinc oxide nanoflowers and nanospheres were examined by scanning electron microscopy (SEM, FEI INSPECT S50), as shown in FIGS. 2A-2B and FIGS. 3A-3B, respectively. The crystallinity and crystal phases of the zinc oxide nanoflowers or nanospheres were studied by an X-ray diffractometer (XRD Rigaku, Japan) using Cu-Kα radiation (λ=1.5418 {acute over (Å)}) in the range of 10°-80° with 1°/min scanning speed. The XRD patterns for both nanoflowers and nanospheres arc shown in FIG. 1. UV-Vis diffuse reflectance spectra of zinc oxide nanoflowers and nanospheres, as shown in FIG. 4, were recorded on a diffuse reflectance UV-Vis spectrophotometer (JASCO V-750). Micromeritics ASAP 2020 PLUS nitrogen adsorption apparatus (USA) was employed for BET surface area determination. Before surface area analysis, samples were degassed at 180° C., and the surface area was then determined using N₂ adsorption data in the relative pressure (P/P₀) range of 0.05-0.3, as shown in FIG. 5. The BET surface area of zinc oxide nanoflowers was observed as 22.54 m²/g (pore size: 22.92 nm; pore volume 0.1291 cm³/g) while for nanospheres, the surface area was 9.51 m²/g (pore size: 30.74 nm; pore volume 0.0780 cm³/g).

Example 2

Characterizations of Bi₂S₃—CdS Nanospheres

The morphologies of Bi₂S₃—CdS nanospheres were examined by scanning electron microscopy (SEM, FEI INSPECT S50). The crystallinity and crystal phases of as-synthesized Bi₂S₃—CdS were studied by X-ray diffractometer (XRD Rigaku, Japan) measured with Cu-Kα radiation (λ=1.5418 Å) in the range of 10-80° with 1°/min scanning speed. UV-Vis diffuse reflectance spectrum of Bi₂S₃—CdS was recorded on a diffuse reflectance UV-Vis spectrophotometer (JASCO V-750). Micromeritics ASAP 2020 PLUS nitrogen adsorption apparatus (USA) was employed for BET surface area determination. Before analysis, samples were degassed at 180° C. Surface area was determined using N₂ adsorption data in the relative pressure (P/P₀) range of 0.05-0.3.