Two-dimensional
antimonene has many potential applications for its high mobility,
high stability, and tunable band gap. The covalent chemistry of antimonene
and the molecular doping or hybrid of antimonene remain incomplete
for further applications. In this work, silane-functionalized antimonene
nanosheets and their copolymerized organically modified silicate gel
glasses are designed and prepared. The experimental data confirmed
that 3-glycidoxypropyltrimethoxysilane interacts covalently with antimonene.
Compared with unfunctionalized antimonene, the silane-functionalized
antimonene shows higher concentration, higher compatibility, and dispersion
stability in solvents and gel matrices. In particular, the doping
concentration of functionalized antimonene nanosheets can reach 2%
in gel glass, which is larger than conventional nanocomposites and
nanohybrids. These nanosheets exhibit outstanding optical limiting
performance in the visible and long-wavelength near-infrared regions
(532–2150 nm). The mechanism of optical limiting is found to
be a combination of nonlinear absorption, nonlinear refraction, and
nonlinear scattering. The silane-functionalized antimonene nanosheets
and their copolymerized hybrids will be promising materials for optoelectronics,
biology, energy, and others.
In order to tune the intrinsic three-order nonlinear optical (NLO) properties of polyoxometalates (POMs), adopting one strategy of substituting addenda atom of POMs, we obtained a class of polyoxomolybdovanadates, [TBA]3[VMo5O19]...
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