Affiliation:
1. Laboratoire de Physique et Chimie des Matériaux (LPCM) Université Mouloud MAMMERI de Tizi-Ouzou BP 17, RP Tizi Ouzou 15000 Algeria
2. Laboratoire de Physico-chimie des Matériaux et Catalyse(LPCMC) Université Abderrahmane Mira de Béjaia Béjaïa CP 06000, Béjaia Algeria
3. CRAPC-Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques Ouargla, Algérie
Abstract
AbstractIn this paper, a mesoporous bismuth nanopowders (Bi‐NPWs) were synthesized by chemical method and used as photosbilizer agent. The formation and stability of Bi in the solution was monitored by UV‐Vis analysis, the results shows a strong plasmonic band near 270 nm, which confirms the reduction of bismuth ions to Bi0 in the aqueous phase.Also, after the precipitating process, the optical properties of Bi‐NPWs were measured with UV‐Vis spectroscopy, which showed an absorption peak around 290 and 470 nm, characteristic of the plasmonic response of Bi nanoparticles (Bi‐NPs). X‐ray diffraction (XRD) analysis have revealed a rhombohedral polycrystalline structure with a preferential orientation along the (012) plane for the Bi‐NPs. The surface states of the Bi‐NPs were evidenced by X‐ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR).The plasmonic properties the Bi‐NPWs was evaluated and exploited to photo‐stabilization of 2‐Aminophenol (2AP) in aqueous solutions under UV irradiation (365 nm). It was found that the Bi‐NPWs exhibited a remarkablephoto‐stabilization performance depending on the active surface.In the absence of Bi‐NPWs, a significant variation which increases to about (0.42 %) after 9 h of UV irradiation was noticed, with the presence of 6
and 45
Bi‐NPs the relative variation decreases to about (0.12 %) and to about 0.2 % respectively.