Giant defect emission enhancement from ZnO nanowires through desulfurization process

Abstract

of about 5.3 meV which shows a good agreement to the ambient thermal energy at 70 K. Traditionally, ZnO:Zn with high defect emission can be created directly through the use of very high temperature processes. We have shown here that through the sulfurization/desulfurization process strong defect emission can be induced at lower temperatures with greater control over degree of defects induced. This is an important advancement, particularly in the field of earth-abundant phosphors. Experimental Details and Analysis Method ZnO nanowires were prepared by chemical bath deposition on quartz and silicon substrates. 0.035 M Zinc acetate was dissolved in 750 mL of DI water. 9 ml of ammonium hydroxide was added to this solution. The ZnO seed layer pre-coated quartz and silicon substrates were immersed in this solution for one hour at 87 °C (details of the deposition technique have been reported elsewhere 28). The desulfurized ZnO was prepared via two steps, namely sulfurization and desulfurization, in a chemical vapor deposition (CVD) reactor (a horizontal tube furnace).

Synthesis of ZnO Nanoparticles/Nanofibers and Their Luminescence via Electrospinning

“…ZnO nanorods, the visible emission peak of ZnO nanoparticles/nanofibers shifted to a longer wavelength of ~ 660 nm, and NBE peak disappeared. The dominated visible emission peak in the PL in ZnO suggested that oxygen vacancy defects exist in ZnO [11,12]. However, it should be noted that the visible emission peak of ZnO nanoparticles/nanofibers was much higher than that of ZnO nanorods.…”

Effects of Sintering Temperature Variation on Synthesis of Glass-Ceramic Phosphor Using Rice Husk Ash as Silica Source

“…Samples A1-A3 (Figure 9a-c) and B1-B3 (Figure 9d-f) appeared slightly yellowish due to the presence of β-Zn 2 SiO 4 which was responsible for the yellow emission. Whereas the green emission was evident in samples C1-C3 (Figure 9g-i) and D1-D3 (Figure 9j-l) sintered under various holding times indicated the occupancy of α-Zn 2 SiO 4 [54]. Particularly, samples C appeared in yellowish-green.…”

Science and Technology Progress on the Desulfurization Process of Crude Oil

“…Zinc oxide is a crystalline inorganic material which mainly exists in the wurtzite crystal phase 81 . Zinc oxide is a commonly used support in a reactive adsorption process.…”

“…It was found that 13 wt % Ni on ZnO gave the highest catalytic activity. From 117 mg/L initial sulfur concentration, the processed crude oil only contains less than 0.1 mg/L sulfur content after reactive adsorption process using Ni/ZnO material 81 …”