Green Method, Optical and Structural Characterization of ZnO Nanoparticles Synthesized Using Leaves Extract of M. oleifera

Abstract

ZnO nanoparticles (ZnO-NP) present innovative optical, electrical, and magnetic properties that depend on specific characteristics, e.g., size, distribution, and morphology. Thus, these properties are essential to address various applications in areas such as electronics, medicine, energy, and others. In addition, the performance of this ZnO-NP depends of their preparation which can be done by chemical, physical, and biological methods. Meanwhile, nowadays, the main interest in developing ZnO-NP synthesis through biological methods bases on the decrease of use of toxic chemicals or energy applied to the procedures, making the process more cost-effective and environmentally friendly. However, the large-scale production of nanoparticles by green synthesis remains a big challenge due to the complexity of the biological extracts used in chemical reactions. That being the case, the preparation of ZnO-NP using Moringa oleifera extract as an alternative biological agent for capping and reduction in synthesis was evaluated in this work. Then, the results based on the analysis of the optical and structural characterization of the ZnO-NP obtained by employing UV-Vis, DLS, zeta potential, XRD, ATR-FTIR, and FE-SEM indicate mostly the presence of spherical nanosized material with a mean hydrodynamic diameter of 47.2 nm measured by DLS and a mean size diameter of 25 nm observed with FE-SEM technique. Furthermore, in FE-SEM images a homogeneous dispersion and distribution is observed in the absence of agglutination, agglomeration, or generation of significant lumps of the ZnO-NP. The XRD analysis showed that heat annealing induced the crystallite size favoring their monocrystallinity. Those obtained data confirm the synthesis of ZnO-NP and the absence of impurities associated with organic compounds in the annealed samples. Finally, those results and low-cost production present to the synthesized ZnO-NP by this biological method as a useful material in several applications.

Fast and Excellent Enhanced Photocatalytic Degradation of Methylene Blue Using Silver-Doped Zinc Oxide Submicron Structures under Blue Laser Irradiation

“…Figure 4 represents the typical XRD pattern of the samples of pure ZnO, ZnO:Ag (2%) , ZnO:Ag (4%) , ZnO:Ag (6%) , ZnO:Ag (8%) , and ZnO:Ag (10%) . In the case of pure ZnO, there are distinct diffraction peaks representing (100), (002), (101), (102), (110), (102), (110), ( 103), (220), ( 221) and (202) lattice planes that confirm the wurtzite structure, which agrees with the JCPDS card no.01-075-0576 [23]. The sample had highly intense characteristic peaks at 2θ = 31.63 • , 34.26 • , and 36.04 • corresponding to the lattice planes (100), (002), and (101), respectively.…”

“…the JCPDS card no.01-075-0576 [23]. The sample had highly intense characteristic peaks at 2𝜃 = 31.63 o , 34.26 o , and 36.04 o, corresponding to the lattice planes (100), (002), and (101), respectively.…”

Studi Awal Biosintesis Nanopartikel Zno Menggunakan Ekstrak Daun Moringa Oleifera Dengan Teknik Presipitasi

“…Seng oksida (ZnO) merupakan semikonduktor anorganik tipe-n golongan II -VI yang memiliki fase heksagonal dan struktur wurtzite [1,2]. ZnO memiliki lebar celah pita sebesar 3.37 eV dan energi ikat eksiton yang tinggi yaitu sebesar 60 meV [3].…”

“…ZnO memiliki lebar celah pita sebesar 3.37 eV dan energi ikat eksiton yang tinggi yaitu sebesar 60 meV [3]. Sehingga, apabila ZnO digunakan sebagai bahan baku untuk aplikasi optoelektronik pada suhu kamar akan memiliki efektivitas dan efisiensi yang tinggi [2,3]. Secara umum, serbuk ZnO memiliki karakteristik tidak berbau, tidak beracun, biokompatibilitas, dan tahan terhadap perlakuan suhu tinggi [4,5].…”

“…ZnO sebagai material semikonduktor mudah disintesis menjadi berbagai bentuk struktur nano, di antaranya nanowires, nanotubes, nanorings, nanorods, nanoflowers, dan nanoparticles. Nanopartikel ZnO (ZnO-NP) memiliki mobilitas elektron yang tinggi yaitu sebesar 200 cm 2 /Vs, stabilitas termal, dan absorbansi yang baik [2]. Ditinjau dari sifat absorbansi pada rentang panjang gelombang 300 -350 nm (sinar ultraviolet), ZnO-NP dapat digunakan untuk aplikasi panel surya, perangkat penyimpangan elektrokimia, pelapisan material, dan industri cat [6,7].…”