Mixed Oxides NiO/ZnO/Al2O3 Synthesized in a Single Step via Ultrasonic Spray Pyrolysis (USP) Method

Duygu Yeşiltepe Özcelik,Sebahattin Gürmen,Srecko Stopic,Burçak Ebin,Bernd Friedrich

doi:10.3390/met12010073

Duygu Yeşiltepe Özcelik, Sebahattin Gürmen + Show 3 more

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https://doi.org/10.3390/met12010073

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Abstract

Mixed oxides have received remarkable attention due to the many opportunities to adjust their interesting structural, electrical, catalytic properties, leading to a better, more useful performance compared to the basic metal oxides. In this study, mixed oxides NiO/ZnO/Al2O3 were synthesized in a single step via the ultrasonic spray pyrolysis method using nitrate salts, and the temperature effects of the process were investigated (400, 600, 800 °C). The synthesized samples were characterized by means of scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction and Raman spectroscopy analyses. The results showed Al2O3, NiO–Al2O3 and ZnO–Al2O3 systems with spinel phases. Furthermore, the Raman peaks supported the coexistence of oxide phases, which strongly impact the overall properties of nanocomposite.

Highlights

Nanocomposites are a research hotspot at present, with various applications in dayto-day technologies
Mixed oxides nickel oxide (NiO)/zinc oxide (ZnO)/Al2 O3 were synthesized via the ultrasonic spray pyrolysis (USP) method using an aqueous solution of nitrate salts under a 1 L min−1 air flow rate at different temperatures (400, 600, 800 ◦ C)
The present work primarily focuses on the production of mixed oxides NiO/ZnO/Al2 O3

Summary

Introduction

Nanocomposites are a research hotspot at present, with various applications in dayto-day technologies. With an increased surface area, and the quantum effects that arise at this scale, this nanocomposite offers better electrical, mechanical, chemical, optical, and magnetic properties. Among the various mixed oxides, nickel oxide (NiO), zinc oxide (ZnO) and alumina (Al2 O3 ) have been a focus in the semiconductor and chemical and petrochemical industry due to their distinguished electronic, magnetic and chemical properties. These mixed metal oxides are widely used in the field of adsorption and catalysis. They are used in many catalytic reactions in chemical and petrochemical industries, including cracking, hydrogenation dehydrogenation, reforming, and dehydration [5,6]

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