Effects of Anion on the Morphologies of ZnO Synthesized by an Aqueous Solution Method

2011 ◽  
Vol 284-286 ◽  
pp. 781-785 ◽  
Author(s):  
Shi Cai Cui ◽  
Da Feng Zhang ◽  
Xi Peng Pu ◽  
Xian Hua Qian ◽  
Tian Tian Ge ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Zinc Sulfate ◽  
Solution Method ◽  
Nano Particles ◽  
X Ray ◽  
Zinc Salts ◽  
Aqueous Solution Method ◽  
Scanning Electron

ZnO were rapidly synthesized using different zinc salts (Zn(NO3)2, Zn(CH3CO2)2, ZnCl2and ZnSO4) by an aqueous solution method at 90°C. The products were characterized by X-ray diffractometry and scanning electron microscopy. The results show that the anions have remarkable effects on the morphologies of ZnO. When Zn(NO3)2, Zn(CH3CO2)2or ZnCl2was used, ZnO was obtained with ellipsoidal, under-developed ellipsoidal and nano-particles morphologies, respectively. In the case of ZnSO4, layered basic zinc sulfate was obtained. The remarkable effects of anions on ZnO can be ascribed to the adsorption of the anions on the surface of ZnO, which hinders the further growth of ZnO nuclei. The effect of SO42-was further investigated by changing the mole ratio of SO42-to NO3-.

scholarly journals Preparation, Characterization, and Photocatalytic Properties of Modified Red Mud

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Mingjie Ma ◽  
Guanyu Wang ◽  
Zhengpeng Yang ◽  
Shanxiu Huang ◽  
Weijie Guo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Uv Irradiation ◽  
Red Mud ◽  
Structure Property ◽  
X Ray Diffraction ◽  
X Ray ◽  
Xrf Scanning ◽  
Scanning Electron

Solid waste red mud was modified by HCl leaching. The structure property and composition of modified red mud were investigated by X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET). Under UV irradiation, methyl orange (MO) aqueous solution was photodegraded by modified red mud. The obtained results showed that the specific surface area of modified red mud was 317.14 m2/g, which was about 40 times higher than that of the normal red mud. After UV irradiation for 50 min, the removal percentage of MO reached 94.2%. The study provided a novel way for the application of red mud to the photocatalytic degradation of organic wastes.

CORE-SHELL Zn/ZnO STRUCTURES WITH IMPROVED PHOTOCATALYTIC PROPERTIES SYNTHESIZED BY AQUEOUS SOLUTION METHOD

2013 ◽  
Vol 06 (06) ◽  
pp. 1350058 ◽  
Author(s):  
YUAN MING HUANG ◽  
QING-LAN MA ◽  
BAO-GAI ZHAI
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Solution Method ◽  
Core Shell ◽  
Green Method ◽  
X Ray ◽  
The Core ◽  
Semiconductor Junction ◽  
Aqueous Solution Method ◽  
Scanning Electron

A facile and green method was utilized to synthesize core-shelled Zn / ZnO microspheres by boiling Zn microparticles in water for improving the photocatalytic activity of ZnO . The synthesized Zn / ZnO core-shells were investigated by means of scanning electron microscope, X-ray diffractometer and photoluminescence spectrometer, respectively. The morphology analysis showed that the metallic Zn core was about 6 μm in diameter while the ZnO shell was about 600 nm in thickness. Compared to ZnO nanoparticles, the core-shelled Zn / ZnO microspheres exhibited improved photocatalytic activity in degrading methyl orange in water. Our results suggest that the metal–semiconductor junction formed at the Zn / ZnO interface is responsible for the enhanced photocatalytic activity of ZnO .

Ethylenediamine Processed Cu2SnS3 Nano Particles via Mild Solution Route

2016 ◽  
Vol 19 (1) ◽  
pp. 001-005 ◽  
Author(s):  
Paul Nesamony Prathiba Jeya Helan ◽  
Kannusamy Mohanraj ◽  
Sethuramachandran Thanikaikarasan ◽  
Thaiyan Mahalingam ◽  
Ganesan Sivakumar ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electron Microscopy Analysis ◽  
Microscopy Techniques ◽  
Scanning Electron

Copper tin sulphide nanoparticles have been prepared by solution growth technique at various ethylenediamine concentrations. Prepared samples have been characterized using x-ray diffraction, fourier transform infrared, Raman and scanning electron microscopy techniques. x-ray diffraction results revealed that the prepared samples are nanocrystalline in nature with tetragonal structure. Fourier transform infrared spectroscopy analysis results showed the presence of Cu-O, Sn-O and Sn-S vibrations in the wavenumber range between 450 and 620 cm-1. Vibrational symmetry of prepared samples have been analyzed using Raman spectroscopy. Scanning electron microscopy analysis indicated the formation of flower like nanocrystals for samples prepared at various Ethylenediamine concentrations.

Hydrothermal Synthesis of SrSO4:Eu2+ Microcrystals with Different Morphologies and its Luminescence Properties

2014 ◽  
Vol 633-634 ◽  
pp. 341-344 ◽  
Author(s):  
Jia Yue Sun ◽  
Qiu Mei Di ◽  
Liu Han ◽  
Qi Guang Xu ◽  
Chen Liang Ma
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Optical Properties ◽  
Hydrothermal Synthesis ◽  
Emission Spectroscopy ◽  
Electron Trapping ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Electron trapping materials SrSO4:Eu2+were prepared by hydrothermal method from fatty alcohol polyoxyethylene (3) ether (AEO-3) aqueous solution at 200 °C for 20 h. The phase structure, microstructure and optical properties were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and excitation-emission spectroscopy (PL-PLE), respectively.

Characterization of Electrophoretically Deposited Chitosan Coatings on Ti13Zr13Nb Alloy for Biomedical Applications

2013 ◽  
Vol 203-204 ◽  
pp. 212-215 ◽  
Author(s):  
Bożena Łosiewicz ◽  
Grzegorz Dercz ◽  
Magdalena Szklarska ◽  
Wojciech Simka ◽  
Marta Łężniak ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Biomedical Applications ◽  
X Ray Diffraction ◽  
Bioactive Coatings ◽  
X Ray ◽  
Scanning Electron ◽  
Deposition Conditions

The chitosan (CH) coatings on a Ti13Zr13Nb alloy substrate were obtained by electrophoretic deposition (EPD). The EPD yield was investigated under different deposition conditions. The microstructure of the CH coatings obtained by cataphoresis was studied by scanning electron microscopy and the chemical composition was examined using EDAX. The functional groups and formed phases were analyzed using Fourier transform infrared spectroscopy and X-ray diffraction, respectively. It was found that the CH coating thickness and porosity can be controlled by time and voltage used for the EPD process. It was ascertained that the studied EPD of the natural biopolymer, chitosan, in aqueous solution is applicable for the surface modification of the Ti13Zr13Nb implants to develop novel bioactive coatings.

The Synthesis of Graphene Oxide via Electrochemical Exfoliation Method

2015 ◽  
Vol 1109 ◽  
pp. 55-59 ◽  
Author(s):  
Nurhafizah Md Disa ◽  
Suriani Abu Bakar ◽  
S. Alfarisa ◽  
Azmi Mohamed ◽  
Illyas Md Isa ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Graphene Oxide ◽  
Sodium Dodecyl ◽  
Electrochemical Exfoliation ◽  
Spectra Analysis ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Scanning Electron

In this study, electrochemical exfoliation method was adopted in the production of graphene oxide (GO). The electrolyte used was sodium dodecyl sulphate (SDS) aqueous solution at various concentrations from 0.001 to 1.0 M. The effect of SDS concentrations on the morphology of GO samples were characterized using field emission scanning electron microscopy (FESEM), energy dispersive X-ray, micro-Raman and UV-Vis spectroscopy. As evident by the FESEM analysis, the concentration of SDS does give effect to the GO obtained in this study. The lowest GO production is given by the lowest concentration of SDS used which is 0.001 M. However, in term of ID/IGratio, the sample prepared at 0.001 M has the lowest value (0.33) as compared to the sample prepared with highest SDS concentration of 1.0 M (ID/IG~1.12). Meanwhile, the presence of absorbance peaks in the range of 224-237 nm from UV-Vis spectra analysis were seen for the whole samples and this indicate the formation of GO.

Green and facile synthesis of Fe3O4 nanoparticles using the Citrus aurantifolia fruit juice associated with NaBH4 and its adsorption of Cr(VI) in aqueous solution

2021 ◽  
Vol 10 (4) ◽  
pp. 86-96
Author(s):  
Thanh Luong Huynh Vu ◽  
Hao Dao Lam Gia ◽  
Trang Phan Thi Diem ◽  
Tien Pham Minh ◽  
Quyen Tran Thi Bich ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Fe3o4 Nanoparticles ◽  
Effective Parameters ◽  
X Ray Diffraction ◽  
Citrus Aurantifolia ◽  
X Ray ◽  
Mean Size ◽  
Scanning Electron

This work presents a facile and green method using Citrus aurantifolia fruit extract for the biosynthesis of magnetite nanoparticles (MNs). The effects of some effective parameters such as temperature, reaction time and the ratio of Citrus aurantifolia extract to sodium borohydride on the synthesis were investigated. The synthesized Fe3O4 nanoparticles were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), energy-dispersive X- ray spectroscopy (EDX), transmission scanning electron microscopy (TEM), and vibrating sample magnetometer (VSM). The results showed that the MNs were well-monodisperse with the mean size of 50 nm and superparamagnetism value of 40.1 emu/g. Adsorption of Cr(VI) in aqueous solution at pH 2.5 using MNs reached 94.9% for removal of Cr(VI). The main contribution of this work was the synthesis of MNs in an economical and environmental friendly way, achieving size-controlled MNs at mild conditions. A possible mechanism of MNs synthesis was also presented.

Preparation and Characterization of a Novel Rice Paste for Bone Hemostatic Biomaterial

2017 ◽  
Vol 744 ◽  
pp. 475-479 ◽  
Author(s):  
Sittiporn Punyanitya ◽  
Rungsarit Koonawoot ◽  
Warangkul Punyanitya
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Moisture Content ◽  
Physical Properties ◽  
Solution Method ◽  
Rice Starch ◽  
Degree Of Swelling ◽  
Aqueous Solution Method ◽  
Scanning Electron

Bone hemostatic biomaterials were prepared with different compositions of rice starch (RS) powder and glycerin-base soap. The glycerin soap was composed of liquid glycerol:KOH:stearic acid by aqueous solution method. RS powders (10, 20, 40, and 60 wt %) was added to the purified glycerin soap. The physical properties and degradation of the obtained samples were evaluated. The samples were characterized by scanning electron microscopy (SEM), degree of swelling (DS), moisture content and degradation. An addition of RS powder increased absorbability property, the smoothness, whiteness and could be smear easily on the surface. The results of optimized condition have shown the samples of 20 wt% RS powder had the highest DS of 0.91 ± 0.25 for 90 minutes, the moisture content of 0.43 ± 0.21 % and the degradability of 69.95± 1.50 % for 48 hours. Our results concluded that the samples were sufficient physical properties for use as substitute, and more degradable than bone wax.

Preparation of the EG/TiO2 Composites in the Method of Impregnation

2011 ◽  
Vol 474-476 ◽  
pp. 792-796
Author(s):  
Li Qin Wang ◽  
Xiang Ni Yang ◽  
Xiu Li Zhao ◽  
Rui Jun Zhang ◽  
Yu Lin Yang
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Methyl Orange ◽  
Lamellar Structure ◽  
Expanded Graphite ◽  
X Ray ◽  
Ft Ir ◽  
Scanning Electron

The composites of expanded graphite with TiO2(EG/TiO2) were prepared in the method of impregnation, the morphology and crystal structure were characterized by the means of scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The decolorization performance of the EG/TiO2composites for the methyl orange aqueous solution were studied. The experimental results were shown as follows: the EG/TiO2composites maintained the porous and lamellar structure of EG, and a lot of anatase TiO2particles as a small lumpdistributed on surfaces and in layers of EG. The composites may contain the graphite both oxidized and un-oxidized, and there was no other organic group left in the composites, except for the functional groups of graphite. Moreover, the EG/TiO2composites had excellent decolorization performance for the methyl orange aqueous solution. When reacted for 90 min, the decolorization rate of the methyl orange aqueous solution was at the peak, up to 96.1%. We supposed that it was mainly due to the interaction between the strong adsorptive ability of EG and the degradation property of TiO2particles.

Study on Synthesis Nanomicrostructures of Zinc Borate (Zn3B6O12•3.5H2O) with Different Morphologies

2011 ◽  
Vol 236-238 ◽  
pp. 1687-1691 ◽  
Author(s):  
Hui Ren ◽  
You Ming Cao ◽  
Zhou Qiao Lei
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Raw Materials ◽  
Average Length ◽  
Zinc Borate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The crystal zinc borate (Zn3B6O12·3.5H2O) nano-strips and nano-flakes were successfully prepared by a wet method using boric acid (H3BO3) and Zn(NO3)2·H2O as raw materials in situ aqueous solution, and triethanolamine as the modifying agent. The nano/microstructures and morphologies of the as-obtained samples were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with an energy dispersive X-ray spectrometer (EDS) and thermogravimetric analysis (TGA). It had been found that the as-prepared materials displayed nanostrips with average length from 100 to 200nm and the thicknesses about 30nm as well as nanoflakes with diameter about 4μm and thickness about several nanometers morphology.

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