Synthesis of Au/Co3O4/PVA hybrid nanocomposites via eco-friendly method based on pulsed laser ablation process for water treatment

被引:1
|
作者
Mostafa, Ayman M. [1 ]
Al-Otaify, Ali [1 ]
Younis, Alaa M. [2 ]
Mwafy, Eman A. [3 ]
机构
[1] Qassim Univ, Coll Sci, Dept Phys, POB 6644, Buraydah Almolaydah 51452, Saudi Arabia
[2] Qassim Univ, Coll Sci, Dept Chem, POB 6644, Buraydah Almolaydah 51452, Saudi Arabia
[3] Natl Res Ctr, Inst Adv Mat Technol & Mineral Resources, Phys Chem Dept, EI Behoth St 33, Cairo 12622, Egypt
关键词
Laser ablation; Metal oxides; Catalytic degradation; Nanostructured materials; Optical properties; Water treatment; NANO-CADMIUM SULFIDE; CATALYTIC-REDUCTION; GREEN SYNTHESIS; NANOPARTICLES; FACILE; AG;
D O I
10.1016/j.surfin.2024.105230
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A portable nanostructured nanocomposite film, based on cobalt oxide and gold nanoparticles (NPs) embedded in a polyvinyl alcohol structure (PVA), Au/Co3O4/PVA, was prepared via a novel way based on pulsed laser ablation to be applied as an effective catalytic degradation material for a hazardous chemical structure as nitro compounds. Au/Co3O4/PVA was investigated by the techniques of UV-Vis, FT-IR, SEM, and XRD. From XRD, the decrease in crystallinity of PVA is attributed to the intermolecular hydrogen bonding between PVA and Au/ Co3O4. In addition, there are five interplanar peaks, with three shared peaks by both phases and one unique peak for each phase of Au and Co3O4. From FT-IR, the modes observed at a 500-1200 cm-1 wavenumber range correspond to the stretching vibration modes of Au/Co3O4. From UV-VIS, as the embedding of Co3O4 on Au-PVA structure increases, the energy band gap is shifted to a lower value. This is due to the embedding of Co3O4 NPs. From SEM, in the case of embedding PVA with Au NPs, the bright semi-spherical shape of the nanostructured materials has a bright semi-spherical light area. Moreover, in the case of the embedded PVA with Co3O4 NPs, the faint semi-spherical form of the nanostructured materials is discernible. Besides, the catalytic activity performance is tested for the degradation of 4-nitrophenol, which reveales that the reaction followed first-order kinetics, as indicated by linear regression analysis. The results shows that the sample completely convertes 4nitrophenol to 4-aminophenol within 6 min.
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页数:10
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