Facile green synthesis of ZnO nanoparticles using natural-based materials: Properties, mechanism, surface modification and application
TL;DR: In this article, the green synthesis of ZnO nanoparticles has been studied and shown to be facile and feasible to produce green synthesized nanoparticles with advanced properties as compared to the chemically synthesized ones, and surface modification using metal and non-metal ions are applied to alter and improve the properties of the nanoparticles.
Abstract: An enormous amount of research had been dedicated to exploring the nanotechnology over the past decade. The fast-paced development of nanomaterial production has enhanced the application of zinc oxide (ZnO) in a wide variety fields. ZnO nanoparticles can be obtained mechanically or chemically for commercial use. However, the environmental issues raised by these techniques have been brought to the world’s attention. Nowadays, green synthesis of ZnO nanoparticles is of particular interest in the research field aiming to mitigate environmental problems. In this green approach, natural based materials such as plant extract, microbes, fungus and algae are used as bio-reductants and bio-stabilizers due to their enrichment in bioactive phytochemicals. Numerous studies have proven that the green synthesis is facile and feasible to produce ZnO nanopowder with advanced properties as compared to the chemically synthesized ZnO nanoparticles. In order to make the green synthesized ZnO nanoparticles more applicable in a wide range of uses, surface modification using metal and non-metal ions are applied to alter and improve the properties of ZnO nanoparticles. The findings available currently represent an excellent initial step towards the promising green approach in the synthesis of ZnO nanoparticles and additional work should be undertaken to exploit the application of green synthesis in the commercial platform.
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TL;DR: In this article, a promising route for fabrication of ZnO photocatalyst with high efficiency for detoxification of organic pollutants in wastewater was demonstrated. But, it was only three times of use.
50 citations
TL;DR: In this article , Salicifolium leaves were employed in the green synthesis of platinum nanoparticles (PS-PtNPs) by an immediate, one-step, cost-effective procedure in the current investigation.
Abstract: The aqueous extract of P. salicifolium leaves was employed in the green synthesis of platinum nanoparticles (PS-PtNPs) by an immediate, one step, cost-effective procedure in the current investigation. PS-PtNPs were characterized via several techniques including UV-Visible spectroscopy, Fourier Transform Infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), High-resolution Transmission electron microscope (HRTEM), Selected Area Electron Diffraction (SAED), Energy Dispersive X-ray spectroscopy (EDX), EDX elemental mapping, and X-ray Photoelectron Spectroscopy (XPS) and Zeta potential. The produced PS-PtNPs were dark brown in color with almost spherical shape in the size range from 1 to 3 nm. The plasmon peak at 295 nm clarified the biogenic synthesis of PS-PtNPs utilizing P. salicifolium aqueous extract. Moreover, the synthesized PS-PtNPs possessed high stability due to its zeta potential of – 25.9 mV that confirmed by its stability for more than three months. PS-PtNPs were verified to be a superb catalyst as they were able to catalytically degrade MB with different concentrations up to 100 mg/L immediately. PS-PtNPs exhibited a high antibacterial efficacy against gram-negative bacteria. Furthermore, PS-PtNPs were proved to be a powerful antioxidant and also a promising antidiabetic agent. The obtained results offer a promising route of the biogenic synthesis of PtNPs using the aqueous extract of P. salicifolium.
39 citations
TL;DR: In this article, Salicifolium leaves were employed in the green synthesis of platinum nanoparticles (PS-PtNPs) by an immediate, one-step, cost-effective procedure in the current investigation.
Abstract: The aqueous extract of P. salicifolium leaves was employed in the green synthesis of platinum nanoparticles (PS-PtNPs) by an immediate, one step, cost-effective procedure in the current investigation. PS-PtNPs were characterized via several techniques including UV-Visible spectroscopy, Fourier Transform Infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), High-resolution Transmission electron microscope (HRTEM), Selected Area Electron Diffraction (SAED), Energy Dispersive X-ray spectroscopy (EDX), EDX elemental mapping, and X-ray Photoelectron Spectroscopy (XPS) and Zeta potential. The produced PS-PtNPs were dark brown in color with almost spherical shape in the size range from 1-3 nm. The plasmon peak at 295 nm clarified the biogenic synthesis of PS-PtNPs utilizing P. salicifolium aqueous extract. Moreover, the synthesized PS-PtNPs possessed high stability due to its zeta potential of – 25.9 mV that confirmed by its stability for more than three months. PS-PtNPs were verified to be a superb catalyst as they were able to catalytically degrade MB with different concentrations up to 100 mg/L immediately. PS-PtNPs exhibited a high antibacterial efficacy against gram-negative bacteria. Furthermore, PS-PtNPs were proved to be a powerful antioxidant and also a promising antidiabetic agent. The obtained results offer a promising route of the biogenic synthesis of PtNPs using the aqueous extract of P. salicifolium.
39 citations
TL;DR: In this article , the ZnO-NPs with average sizes ranging from 7 to 130 nm, quasi-spherical shapes, and hexagonal prism shapes were synthesized.
22 citations
20 Oct 2021
TL;DR: A comprehensive review on the biopolymeric membrane applications in micropollutants removal from wastewater is presented in this paper, where the advantages of these biopolymer materials include renewability, biocompatibility, biodegradability, and cost-effectiveness when compared to non-biodegradable polymers.
Abstract: Herein, this paper details a comprehensive review on the biopolymeric membrane applications in micropollutants’ removal from wastewater. As such, the implications of utilising non-biodegradable membrane materials are outlined. In comparison, considerations on the concept of utilising nanostructured biodegradable polymeric membranes are also outlined. Such biodegradable polymers under considerations include biopolymers-derived cellulose and carrageenan. The advantages of these biopolymer materials include renewability, biocompatibility, biodegradability, and cost-effectiveness when compared to non-biodegradable polymers. The modifications of the biopolymeric membranes were also deliberated in detail. This included the utilisation of cellulose as matrix support for nanomaterials. Furthermore, attention towards the recent advances on using nanofillers towards the stabilisation and enhancement of biopolymeric membrane performances towards organic contaminants removal. It was noted that most of the biopolymeric membrane applications focused on organic dyes (methyl blue, Congo red, azo dyes), crude oil, hexane, and pharmaceutical chemicals such as tetracycline. However, more studies should be dedicated towards emerging pollutants such as micropollutants. The biopolymeric membrane performances such as rejection capabilities, fouling resistance, and water permeability properties were also outlined.
19 citations
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TL;DR: The most important methods of preparation of ZnO divided into metallurgical and chemical methods are presented and possible applications in various branches of industry: rubber, pharmaceutical, cosmetics, textile, electronic and electrotechnology, photocatalysis were introduced.
Abstract: Zinc oxide can be called a multifunctional material thanks to its unique physical and chemical properties. The first part of this paper presents the most important methods of preparation of ZnO divided into metallurgical and chemical methods. The mechanochemical process, controlled precipitation, sol-gel method, solvothermal and hydrothermal method, method using emulsion and microemulsion enviroment and other methods of obtaining zinc oxide were classified as chemical methods. In the next part of this review, the modification methods of ZnO were characterized. The modification with organic (carboxylic acid, silanes) and inroganic (metal oxides) compounds, and polymer matrices were mainly described. Finally, we present possible applications in various branches of industry: rubber, pharmaceutical, cosmetics, textile, electronic and electrotechnology, photocatalysis were introduced. This review provides useful information for specialist dealings with zinc oxide.
1,790 citations
TL;DR: A contemporary review and analysis of the manufacture of ZnO, and its properties, applications, and future prospects can be found in this paper, where the authors provide a survey of the processes used to produce the oxide.
621 citations
TL;DR: Bacteria-mediated ZnO NPs were synthesized and proved to be a good novel antimicrobial material for the first time in this study.
585 citations
TL;DR: In this article, a review of different methods of nanoparticle preparations and its advantages, disadvantages, and applications is presented, which is categorized into two main types on as bottom up methods and top down methods depending on starting material of nanoparticles preparation.
573 citations
TL;DR: In this article, a green approach for the synthesis of zinc oxide nanoparticles employing aqueous flower extract of Nyctanthes arbor-tristis was presented, and the resulting nanopowder was stored in dried form and was found to be stable after 4 months.
483 citations