Aqueous stability of nanostructured aluminum and gallium oxyhydroxide before and after functionalization with lysine

Abstract

Composites of nanostructured aluminum and gallium oxyhydroxide (AlOOH and GaOOH) and L-lysine were synthesized using an environmentally friendly approach. These composites were investigated to determine the effects of the functionalization on the aqueous stability and leaching of aluminum and gallium. The organic and inorganic components present in the samples were assessed with X-Ray photoelectron spectroscopy (XPS) and Fourier transformed-infrared spectroscopy (FT-IR). In the GaOOH-lysine composite, XPS provided evidence of both the presence of gallium and lysine. Crystallographic information was gathered using X-Ray diffraction (XRD). The FT-IR and XRD spectra of the composite materials were dominated by peaks related to lysine, due to the nature of these samples. Inductively coupled plasma-mass spectrometry (ICP-MS) data were collected of the functionalized and nonfunctionalized samples left in solution for periods of 1 day, 5 days and 7 days. This provided evidence of improved aqueous stability of the AlOOH-lysine composite with no effect seen in the GaOOH-lysine composite. The findings of this study will be used in determining the importance of lysine functionalization for future biomolecule-nanomaterial composites.

Fabrication of Al doped α-GaOOH nanorod arrays on FTO for self-powered photoelectrochemical solar-blind UV photodetectors

“…Figure 4(c) indicates the high-resolution Al 2p core-level, which can be divided into two peaks at 74.2 eV and 75.8 eV. The peak at 74.2 eV corresponds to Al-O bonds, while the other peak at 75.8 eV is related to Al-OH bonds in Al doped α-GaOOH [25,31]. The inset of figure 4(c) shows the high-resolution Ga 2p core-level peaks at 1144.9 eV and 1117.9 eV, which correspond to Ga 2p 1/2 and Ga 2p 3/2 peaks, respectively.…”

Nanostructured Oxides Containing Ga: Materials with Unique Properties for Aqueous-Based Applications

“…The prospective will focus on the challenges and opportunities associated with not only making these materials but also further modifying them via chemical functionalization . Additional surface chemistry on Ga 2 O 3 and GaOOH can improve their stability in aqueous solutions . However, surface passivation is not the only motivation for the development of surface chemistry routes to alter them.…”

“…10 Additional surface chemistry on Ga 2 O 3 and GaOOH can improve their stability in aqueous solutions. 11 However, surface passivation is not the only motivation for the development of surface chemistry routes to alter them. Additional optical properties that can change include photoluminescence 12 and persistent photoluminescence.…”

Synthesis of novel periodic mesoporous organosilicas with large content of lysine‐bridged organosilane skeleton

“…Furthermore, lysine as organic moieties is incorporated into various materials to increase cell adhesion, biocompatibility and aqueous stability, which is used as biosensors and targeted radiation [5][6][7]. Owing to this, lysine has been used in synthesising and functionalising nanomaterials [8,9].…”