Direct synthesis of monodispersed ZnO nanoparticles in an aqueous solution

Li, Minggang; Hari-Bala,; Lv, Xiaotang; Ma, Xiaokun; Sun, Fangfang; Tang, Lanqin; Wang, Zichen

doi:10.1016/j.matlet.2006.05.043

Cited by 88 publications

(33 citation statements)

References 16 publications

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“…Further, in this case, using various chemicals may produce toxicity which contaminate the NPs and make them unsuitable for biological applications. In order to use the ZnO nanocrystals for bio-applications, the synthetic process has to meet several requirements that should contain only bio-compatible materials or a suitable surface capping agent with a stable colloidal solution and many more (Li et al 2007;Ratkovich and Penn 2009).…”

Section: Introductionmentioning

confidence: 99%

Structural and optical characterization of pure and starch-capped ZnO quantum dots and their photocatalytic activity

Vidhya¹,

Saravanan

Bhoopathi³

et al. 2014

Appl Nanosci

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Among the different types of metal oxides, zinc oxide (ZnO) is a most commonly used metal oxide in a broad variety of applications. In the present investigation, a modified green synthesis route was used to synthesize pure and starch-capped ZnO (ZnO/starch) quantum dots (QDs) and studied their structural and optical characteristics. In this study, hexagonal crystal structure was observed in both pure and ZnO/starch QDs using X-ray diffraction technique. A spherical-shaped surface morphology was found with the size of 5-10 nm using transmission electron microscope technique. The interaction between ZnO QDs and starch molecules was proved via Fourier infra-red spectrometer technique. On the other hand, their fluorescence behaviors were investigated using photoluminescence technique, in that the ZnO/starch QDs showed an enhanced emission behavior when compared to the pure ZnO QDs. Further, the solar photocatalytic activity of both the ZnO QDs was examined with the dye Rhodamine B (RhB) at the end of 30, 60, 90, and 120 min. In this, ZnO/ starch QDs show a good and more decomposition of RhB than pure ZnO QDs. Collectively, in the present study, green synthesis route produced an efficient QDs (pure and ZnO/starch) and it will be very useful for many other QDs. The ZnO/starch QDs are suitable for decomposing the RhB and other toxic organic dyes.

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Section: Introductionmentioning

confidence: 99%

Structural and optical characterization of pure and starch-capped ZnO quantum dots and their photocatalytic activity

Vidhya¹,

Saravanan

Bhoopathi³

et al. 2014

Appl Nanosci

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“…[18][19][20][21][22][23] Recently, solution phase routes including microemulsion, 23 solvothermal, 14 hydrothermal, 24 self-assembly and template assisted sol-gel methods have been utilized for the synthesis of ZnO nanostructures. 22,[25][26][27] However, to the best of our knowledge, few are the reports on the utilization of biotemplates for the synthesis of ZnO nanostructures. 28 Here we disclosure a new method for the preparation of brush-like ZnO nanorods using albumen as a natural and nontoxic template, and water as a green solvent.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of brush-like ZnO nanorods using albumen as biotemplate

Nouroozi¹,

Farzaneh²

2011

J. Braz. Chem. Soc.

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Nanobastões de ZnO com morfologia similar à de escovas, estrutura cristalina do tipo wurtzita (hexagonal), diâmetro médio de 90 nm e comprimento ≥1 μm, foram preparados por calcinação (700 ° C) do material híbrido (Zn(II)/albumina) obtido pelo método sol-gel reagindo-se acetato de zinco e clara de ovo, em meio aquoso. O material foi caracterizado por difratometria de raio-X de pó (XRD), microscopia eletrônica de varredura (MEV) e de transmissão (TEM), análise termogravimétrica (TGA/DTA), e espectroscopia FT-IR e de fotoluminescência (PL). A área superficial foi determinada como sendo igual a 6,91 m 2 g -1 pelo método BET. Os eventos térmicos no TGA/DTA foram consistentes com a decomposição da albumina a 300 °C e a formação final de ZnO em 578,5 °C. Os resultados mostraram que a albumina desempenha papel essencial na formação dos nanobastões de ZnO, atuando como molde.Crystalline ZnO nanorods with wurtzite-like structure and average diameter of 90 nm and length ≥1 μm, was prepared by calcination (700 °C) of a Zn(II)/albumen hybrid obtained by solgel method, by the reaction of Zn(II) acetate and egg white (albumen), in aqueous solution. The material was characterized by powder X-ray diffraction (XRD), scanning electron (SEM) and transmission electron microscopy (TEM), thermogravimetric analysis (TGA/DTA), N 2 adsorption/ desorption (BET method), FT-IR and photoluminescence (PL) spectroscopy. The surface area was determined to be 6.91 m 2 g -1 by BET method. The TGA/DTA thermal events were consistent with the decomposition of albumen at 300 °C and final formation of ZnO at 578.5 °C. The results showed that albumen act as template playing essential role on defining the formation of ZnO nanorods with brush-like morphology.Keywords: brush-like ZnO nanorods, sol-gel method, egg white (albumen) IntroductionIn recent years, there have been many reports on novel preparation and characterization methods of nanomaterials, based on metal oxide semiconductors in general and ZnO in particular, owing to their special properties. 1 ZnO nanoparticles, with a wide band gap has found to be an efficient candidate for utilization in optical devices operating at room temperature, because of their catalytic/photocatalytic activity and use as CO gas sensor. Furthermore, ZnO is a material with excellent chemical, thermochemical and mechanical stability, which can be used to absorb ultraviolet light, protecting us against this hazardous radiation. 2 Nanostructured ZnO with as different shapes as one dimensional (1D) nanowires, 3-7 nanotubes, 8,9 nanorods 10 and nanobelts, 11 two dimensional (2D) nanostructures such as nanosheets 12 and nanowalls 13 and some three dimensional (3D) nano/microstructures such as nanoflower and tetrapod like structures, [14][15][16][17] have been fabricated by means of various methods. Thus, the fabrication methods of ZnO nanomaterials can be classified into two categories: (i) vapor phase processes and (ii) solution phase routes. [18][19][20][21][22][23] Recently, solution phase routes including microemuls...

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“…Even after prolong time products were not observed. See (Table1.Entries 1-2) While in the presence of catalyst it gives good yields of product (Table 1.Entries [3][4][5] In propargylamine synthesis benzaldehyde and piperidine reacts to form imine. ZnO coordinates with phenylacetylene by C-H bond activation to generate acetylide intermediate which then reacts with iminium ion to form corresponding propargylamines (Fig.9.)…”

Section: Resultsmentioning

confidence: 99%

“…it is an important semiconductor with a band gap of 3.37 eV, and large exciton-binding energy of 60 meV. It is also used in field emission displays, dyes sensitized solar cell, gas sensors, optical probe, catalysis, pharmaceuticals and cosmetics industries [1][2][3][4][5][6]. The preparation of nanocrystalline zinc oxide was reported using several methodologies like solid state reaction [7], chemical vapour phase oxidation of Zn powder [8], solvothermal process [9] and sol gel process [10].…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted additive free synthesis of nanocrystalline zinc oxide

et al. 2010

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Abstracts: An additive free synthesis of nanocrystalline zinc oxide using microwave technique is reported. Current methodology is faster, cleaner and cost effective compared with conventional method for the synthesis of zinc oxide nanocrystalline materials. The structure and morphology of nanocrystalline zinc oxide was investigated by TEM, XRD, EDAX, UV-Vis spectroscopy. The results demonstrate that microwave heating can produce polygonal zinc oxide within a short span of time.

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Direct synthesis of monodispersed ZnO nanoparticles in an aqueous solution

Cited by 88 publications

References 16 publications

Structural and optical characterization of pure and starch-capped ZnO quantum dots and their photocatalytic activity

Structural and optical characterization of pure and starch-capped ZnO quantum dots and their photocatalytic activity

Synthesis and characterization of brush-like ZnO nanorods using albumen as biotemplate

Microwave-assisted additive free synthesis of nanocrystalline zinc oxide

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