Some results are obtained by changing calcination temperature, concentrations, reaction conditions. We need not add chemicals as reducing agent plant based compounds act as reducing agent. Green synthesis is better than traditional methods, in the following aspects, Polyphenols, carbohydrates, alkaloids, terpenoids play the main role in reducing metal ions and maintaining stability 43. Due to environmental friendliness, cost-effectiveness, biocompatibility and safety, nanoparticles were produced using microorganisms and plants through their reductive capacities. Metabolites and proteins in biological systems acting as reducing agent and reduces the inorganic metal ions into metal nanoparticles 42. In the preparation of nano-sized particles in green method, routeusing salts such as nitrates, chlorates and sulfates of metals as the starting materials. Phytochemicals present in the plants are acting as the reducing, capping and stabilizing agents 40-41. Various parts of the plants are used for the preparation of nanoparticles. Especially plant species are used in large-scale, biosynthesis of nanoparticles 37-39. Nowadays, major research is developing on green synthesis of nanoparticles using organisms. In present condition, scientists have discovered various methods to prepare nanoparticles they were financially flexible to us. The role of inorganic metal nanoparticles was not disturbed by high temperature and pressure due to their long shelf- life.Immeasurable sources are available in nature, which is useful for many biological reactions 35-36. That is why we need to go for inorganic compounds as antimicrobial agents, especially nano-sized inorganic metal oxides. Based on particles in various parameters, the biological and pharmaceutical field is developed 1, 34. Most of the antimicrobial agents are toxic and produce unexpected side effects due to their bulky groups 29-33. Antimicrobial agents prepared from organic compounds are mostly sensitive to temperature and pressure. Zinc oxide nanoparticles are used in food packaging, sunscreens, paints and as coating materials 28. In this view zinc oxide with different crystal structure Wurzite, Zinc blende, rock salt and band gap value of 3.1- 3.3 eV is used in many fields 27. Approximately 45% of synthetically prepared Zinc oxide was used as additive in rubber vulcanization 26. Zinc oxide is abundantly present in nature and has attractive characteristics related to many applications 24-25. Among these semiconductors Zinc oxide is considered as important semiconductor because of its non-hazardous and economically favorable characteristics. So on searching techniques to decompose the effluents before reaching water bodies, Fujishima and Honda reported that varieties of semiconductors like ZnS, Zinc oxide, TiO 2, ZrO 2, CuO, CdS, NiO, Cu 2O, Ta 2O 5, ZnFe 2O 4 were used to decompose pollutants in water 5-23. From various industries, effluents were discharged into the water bodies and creating water pollution. It may be solid waste or liquid or gaseous matters 3,4. The main sources of these kinds of pollution are created by the excretion of industrial wastes and effluents. Nanotechnology serves aneffectivetool in the eradication of such pollution. Nowadays environmental pollution such as water, air, soil and noise pollutions is the major problem existing on earth. It is considered as center point for the researchers in chemical, biological, physical and engineering fields. It involves particles with 1-100 nm size and used in more applications oriented studies 1, 2. Nanotechnology is a rapidly growing interdisciplinary field with tremendous applications and having exciting and unique properties. Illicium Verum Mediated Preparation of Zinc Oxide Nanoparticles: XRD, Spectral and Microscopic Analysis. Kalaiamthi M, Maheshwaran A, Hariharan K, Poovarasan B, Chandru P. Green Synthesis Illicium verum Nanoparticles SEM Zinc oxide SEM analysis results sphere and flake like shape and morphology of Zinc oxide nanoparticles. According to the results of XRD, the size was calculated as 27.01 nm. XRD data gave the results regarding structure and size of the prepared nano-sized particles. The formed nanoparticles were confirmed as zinc oxide nanoparticles by UV- Visible, FT-IR spectroscopic techniques. Synthesized Zinc oxide particles in nano size were characterizedby FT-IR, Ultraviolet-visible SEM & XRD techniques. The Zinc oxide nanoparticles were successfully synthesized using Zinc nitrate as the precursor and extract of Illicium verum was used as the reducing and stabilizing agent.
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