Abstract
This work intended to enhance the unique and outstanding properties of lanthanum by synthesizing its nanocomposite. A lanthanum-based nanocomposite was prepared by a simple and cost-effective “co-precipitation” method. Lanthanum nitrate (La (NO3)3) and zinc nitrate (Zn (NO3)2) were used as precursors. The lanthanum/zinc oxide nano composite formed was then calcined at 450 °C for 4 h in order to obtain a fine powder with size in the nano range of 1–100 nm. Characterization of the prepared catalyst was done by ultraviolet/visible spectroscopy, Fourier transform infrared spectroscopy, and photoluminescence. Crystallinity and morphology were found by X-ray diffraction and scanning electron microscopy. The synthesized nanocomposite material was also tested for heterogeneous catalytic applications of 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP). It was found to be successful in complete reduction of 4-NP with enhanced catalytic performance.
Highlights
The properties of metals can be enhanced in combination with another metal i.e., transition metal
Various methods have been reported for the synthesis of nanocomposites, such as the sol-gel method [57,58], chemical vapor deposition (CVD) [59], hydrothermal methods [60], and the solid state method [61]
The prepared nanocomposite was characterized by many useful techniques, i.e., FTIR Fourier transform infrared spectroscopy, ultraviolet spectroscopy, XRD X-ray diffraction, SEM scanning electron microscopy, and PL photoluminescence
Summary
The properties of metals can be enhanced in combination with another metal i.e., transition metal. The reduction of 4-nitrophenol using aqueous NaOH as a reducing agent in the presence of an La2ZnO4 catalyst could be a substitute for conservative reduction processes. No work has done on the direct combination of Lanthanum and Zinc metals in the form of a combined oxide.
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