Comparative study of chemically synthesized and low temperature bio-inspired Musa acuminata peel extract mediated zinc oxide nanoparticles for enhanced visible-photocatalytic degradation of organic contaminants in wastewater treatment.
TL;DR: Green-mediated ZnO showed superior photodegradation efficiency and reusability than chemically synthesized ZnNO, which is applicable for the removal of organic contaminants in wastewater treatment under visible light irradiation.
About: This article is published in Journal of Hazardous Materials.The article was published on 2021-03-15. It has received 32 citations till now. The article focuses on the topics: Photocatalysis & Photodegradation.
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TL;DR: In this article, the authors summarized the recent advances in the fabrication, modification, and industrial application of ZnO-photocatalyst based on the analysis of the latest studies, including the following aspects: overview on the properties, structures, and features of the znO, employment of dopants, heterojunction, and immobilization techniques for improved photodegradation performance, applicability of suspended and immobilized photocatalytic systems, application of ǫ-hybrid for the removal of various types of hazardous pollutants from different wastewater sources in industries, and
50 citations
TL;DR: In this paper , the authors summarized the recent advances in the fabrication, modification, and industrial application of ZnO photocatalyst based on the analysis of the latest studies, including the following aspects: overview on the properties, structures, and features of zinc oxide, employment of dopants, heterojunction, and immobilization techniques for improved photodegradation performance, applicability of suspended and immobilized photocatalytic systems, application of znO hybrids for the removal of various types of hazardous pollutants from different wastewater sources in industries, and potential of bio-inspired ZnOs hybrid nanomaterials.
50 citations
TL;DR: In this article, a critical review of bio-inspired synthesis of nanoparticles is presented, which discusses the influence of bioNPs on agricultural soil, crop growth, and crop diseases compared to chemical NPs or agrochemicals.
Abstract: Agrochemicals have supported the development of the agricultural economy and national population over the past century. However, excessive applications of agrochemicals pose threats to the environment and human health. In the last decades, nanoparticles (NPs) have been a hot topic in many fields, especially in agriculture, because of their physicochemical properties. Nevertheless, the prevalent methods for fabricating NPs are uneconomical and involve toxic reagents, hindering their extensive applications in the agricultural sector. In contrast, inspired by biological exemplifications from microbes and plants, their extract and biomass can act as a reducing and capping agent to form NPs without any toxic reagents. NPs synthesized through these bioinspired routes are cost-effective, ecofriendly, and high performing. With the development of nanotechnology, biosynthetic NPs (bioNPs) have been proven to be a substitute strategy for agrochemicals and traditional NPs in heavy-metal remediation of soil, promotion of plant growth, and management of plant disease with less toxicity and higher performance. Therefore, bioinspired synthesis of NPs will be an inevitable trend for sustainable development in agricultural fields. This critical review will demonstrate the bioinspired synthesis of NPs and discuss the influence of bioNPs on agricultural soil, crop growth, and crop diseases compared to chemical NPs or agrochemicals.
42 citations
TL;DR: In this paper , a review of the use of hydrogel materials in water resources harvesting and treatment is presented, and the shortcomings and future orientation of water purification and water treatment systems based on hydrogels are discussed.
36 citations
Toyohashi University of Technology1, Banha University2, Tokyo University of Agriculture and Technology3, Egyptian Atomic Energy Authority4, Al-Azhar University5, University of Hassan II Casablanca6, University of North Carolina at Charlotte7, Beni-Suef University8, Tanta University9, Jordan University of Science and Technology10, Beijing University of Chemical Technology11, Menoufia University12, Alexandria University13, Cairo University14, Ain Shams University15, Helwan University16, American Physical Therapy Association17, University of Tripoli18, Neelain University19, Stetson University20, German University in Cairo21, An-Najah National University22, University of Science and Technology of China23, Aswan University24, Nile University25, Al-Quds University26
TL;DR: In this article, waste recycled nanomaterials have been utilized as a safe, yet revolutionary alternative with outstanding potential for many biomedical applications for early detection and treatment of different diseases.
Abstract: Global overpopulation, industrial expansion, and urbanization have generated massive
amounts of wastes. This is considered as a significant worldwide challenge that requires
an urgent solution. Additionally, remarkable advances in the field of biomedicine
have impacted the entire spectrum of healthcare and medicine. This has paved the way
for further refining of the outcomes of biomedical strategies toward early detection
and treatment of different diseases. Various nanomaterials (NMs) have been dedicated
to different biomedical applications including drug delivery, vaccinations, imaging
modalities, and biosensors. However, toxicity is still the main factor restricting
their use. NMs recycled from different types of wastes present a pioneering approach
to not only avoid hazardous effects on the environment, but to also implement circular
economy practices, which are crucial to attain sustainable growth. Moreover, recycled
NMs have been utilized as a safe, yet revolutionary alternative with outstanding potential
for many biomedical applications. This review focuses on waste recycled NMs, their
synthesis, properties, and their potential for multiple biomedical applications with
special emphasis on their role in the early detection and control of multiple diseases.
Their pivotal therapeutic actions as antimicrobial, anticancer, antioxidant nanodrugs,
and vaccines will also be outlined. The ongoing advancements in the design of recycled
NMs are expanding their diagnostic and therapeutic roles for diverse biomedical applications
in the era of precision medicine.
35 citations
References
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15 Sep 2006
TL;DR: In this paper, the authors present a first-pass interpretation of the infrared spectrum of a molecule, based on structural features of the molecule, whether they are the backbone of the molecules or the functional groups attached to the molecule.
Abstract: The vibrational spectrum of a molecule is considered to be a unique physical property and is characteristic of the molecule. As such, the infrared spectrum can be used as a fingerprint for identification by the comparison of the spectrum from an “unknown” with previously recorded reference spectra. This is the basis of computer-based spectral searching. In the absence of a suitable reference database, it is possible to effect a basic interpretation of the spectrum from first principles, leading to characterization, and possibly even identification of an unknown sample. This first principles approach is based on the fact that structural features of the molecule, whether they are the backbone of the molecule or the functional groups attached to the molecule, produce characteristic and reproducible absorptions in the spectrum. This information can indicate whether there is backbone to the structure and, if so, whether the backbone consists of linear or branched chains. Next it is possible to determine if there is unsaturation and/or aromatic rings in the structure. Finally, it is possible to deduce whether specific functional groups are present. If detected, one is also able to determine local orientation of the group and its local environment and/or location in the structure. The origins of the sample, its prehistory, and the manner in which the sample is handled all have impact on the final result. Basic rules of interpretation exist and, if followed, a simple, first-pass interpretation leading to material characterization is possible. This article addresses these issues in a simple, logical fashion. Practical examples are included to help guide the reader through the basic concepts of infrared spectral interpretation.
3,824 citations
TL;DR: In this paper, the photo-degradation mechanisms of persistent organic pollutants (POPs) and the recent progress in ZnO nanostructured fabrication methods including doping, heterojunction and modification techniques as well as improvements of ZnOs as a photocatalyst are reviewed.
Abstract: Persistent organic pollutants (POPs) are carbon-based chemical substances that are resistant to environmental degradation and may not be completely removed through treatment processes. Their persistence can contribute to adverse health impacts on wild-life and human beings. Thus, the solar photocatalysis process has received increasing attention due to its great potential as a green and eco-friendly process for the elimination of POPs to increase the security of clean water. In this context, ZnO nanostructures have been shown to be prominent photocatalyst candidates to be used in photodegradation owing to the facts that they are low-cost, non-toxic and more efficient in the absorption across a large fraction of the solar spectrum compared to TiO 2 . There are several aspects, however, need to be taken into consideration for further development. The purpose of this paper is to review the photo-degradation mechanisms of POPs and the recent progress in ZnO nanostructured fabrication methods including doping, heterojunction and modification techniques as well as improvements of ZnO as a photocatalyst. The second objective of this review is to evaluate the immobilization of photocatalyst and suspension systems while looking into their future challenges and prospects.
1,551 citations
TL;DR: Silicate mesoporous materials have received widespread interest because of their potential applications as supports for catalysis, separation, selective adsorption, novel functional materials, and use as hosts to confine guest molecules, due to their extremely high surface areas combined with large and uniform pore sizes.
Abstract: Silicate mesoporous materials have received widespread interest because of their potential applications as supports for catalysis, separation, selective adsorption, novel functional materials, and use as hosts to confine guest molecules, due to their extremely high surface areas combined with large and uniform pore sizes. Over time a constant demand has developed for larger pores with well-defined pore structures. Silicate materials, with well-defined pore sizes of about 2.0–10.0 nm, surpass the pore-size constraint ( 700 m2 g−1) and narrow pore size distributions. Instead of using small organic molecules as templating compounds, as in the case of zeolites, long chain surfactant molecules were employed as the structure-directing agent during the synthesis of these highly ordered materials. The structure, composition, and pore size of these materials can be tailored during synthesis by variation of the reactant stoichiometry, the nature of the surfactant molecule, the auxiliary chemicals, the reaction conditions, or by post-synthesis functionalization techniques. This review focuses mainly on a concise overview of silicate mesoporous materials together with their applications. Perusal of the review will enable researchers to obtain succinct information about microporous and mesoporous materials.
1,274 citations
TL;DR: In this paper, the synthesis of nanostructured zinc oxide nanoparticles by both chemical and biological method was reported, and the results showed that the particles obtained were poly dispersed and the average size ranged from 25 to 40nm.
758 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