Optical properties of Ni2+-doped silica and silicate gel monoliths

Sol-gel Synthesis, Photo- and Electrocatalytic Properties of Mesoporous TiO2 Modified with Transition Metal Ions

“…Therefore, the doublet band is observed in the spectrum. The optical spectra of Ni 2+ is characterized by absorption at 410 and 730 nm, which correspond to nickel ions in octahedral environment (Ni 2+ Oh ), and absorption at 525 and 650 nm, corresponding to Ni 2+ ions in tetrahedral environment (Ni 2+ Td ) [25]. The absorption band of Ni 2+ Oh , lying at 400–450 nm, is hard to distinguish from the fundamental absorption band of titanium dioxide (Fig.…”

Sol-Gel Synthesis and Characterization of Mesoporous TiO2 Modified with Transition Metal Ions (Co, Ni, Mn, Cu)

“…The absorption band at 350-440 nm is overlapped with the fundamental absorption band of titanium dioxide. According to [20] [21]. The absorption band of Ni…”

Fluorescence Line-Narrowing Study of Eu3+-Doped Sol−Gel Silica: Effect of Modifying Cations on the Clustering of Eu3+

“…Most of the work on lasing has focused on Nd 3+ , or organic dye doping. − Er 3+ up-conversion has also been recently reported in sol−gel silica . The optical absorption and/or luminescence properties of several transition-metal and rare-earth ions incorporated into sol−gel silica have been reported, including Cr 3+ , , Ni 2+ , Fe 3+ , Sm 2+ , Nd 3+ , − Er 3+ , , Yb 3+,34 and Pr 3+ . A number of these ions have also been used as dopants in nonsilicate sol−gel matrices. ,, …”