Preparation and Photoactive Characterization of Tube-shaped Al-doped ZnO Ceramics.

2002 ◽  
Vol 737 ◽  
Author(s):  
Yoshinobu Fujishiro ◽  
M. Awano ◽  
S. Kanzaki
Keyword(s):  
Sodium Dodecyl ◽  
Molar Ratio ◽  
Homogeneous Precipitation ◽  
Zno Particles ◽  
Doped Zno ◽  
Conductive Properties ◽  
Photo Decomposition ◽  
Sds Surfactant ◽  
Zno Ceramics

ABSTRUCT:Tubular Al-doped ZnO particles were prepared by homogeneous precipitation in the mixed solutions of Al(NO3)2, Zn(NO3)2, sodium dodecyl sulfate (SDS) surfactant and urea. At the molar ratio of Metal ions(Mt) : SDS : urea : H2O is 1 : 2 : 20 : 60, tubular products formed by heating at 80°C for 12 h. Plate like ZnO particles were obtained at Mt : SDS : urea : H2O = 1 : 2 : 10 : 60 or 1 : 1 : 20 : 60. The diameter of typical ZnO tube is ca.100 nm, and the length of tube is about 600nm (aspect ratio = 6). The relative surface area of tubular Al-doped ZnO is ca. 40.2 m2/g. The photo-decomposition rate of NO3- ions using tubular Al-doped ZnO particles was higher than standard TiO2 photo-catalysts (P-25) by irradiation >290nm light in 10mM KNO3-10vol%EtOH solutions at 30°C. The obtained materials showed DC conductive properties as compacted substrate by sintered at 400°C.

scholarly journals Synthesis of Micro/nano Urchin-like VO2 Particles and Its Decolorization of Methylene Blue

2019 ◽  
Vol 35 (3) ◽  
Author(s):  
Nguyen The Manh ◽  
Duong Hong Quan ◽  
Vu Thi Ngoc Minh ◽  
Vuong Pham Hung
Keyword(s):  
Methylene Blue ◽  
Sodium Dodecyl ◽  
Adsorption Properties ◽  
Contaminated Water ◽  
Potential Applications ◽  
Synthesis Procedure ◽  
Water Treatments ◽  
Sds Surfactant ◽  
Mb Adsorption

Micro/nano urchin-like VO2 particles were synthesized successfully by hydrothermal method. Vanadium pentoxide (V2O5), oxalic acid (C2H2O4) and sodium dodecyl sulfate (SDS) surfactant were used as reagents for the synthesis of VO2. In this article, we have reported the synthesis procedure of VO2 nanorods and micro/nano urchin-like VO2 structure and evaluating the methylene blue (MB) adsorption properties. Morphology and particle size of VO2 were observed by FE-SEM. The phase formation of VO2 was studied by XRD. Raman spectroscopy was also used for characterization of VO2. Micro/nano urchin-like VO2 structure was showed good MB adsorption properties that have potential applications in dye-contaminated water treatments.

Preparation and characterization of Ni-doped ZnO particles via a bioassisted process

2010 ◽  
Vol 372 (1-3) ◽  
pp. 165-171 ◽  
Author(s):  
Yan Wang ◽  
Xiaoming Liao ◽  
Zhongbing Huang ◽  
Guangfu Yin ◽  
Jianwen Gu ◽  
...  
Keyword(s):  
Zno Particles ◽  
Doped Zno

The Preparation and Characterization of Fe-ZnO Nanoparticles Immobilized onto Fiberglass Cloth

2020 ◽  
Vol 402 ◽  
pp. 115-124
Author(s):  
Muktarida Omar ◽  
Muhammad Adlim ◽  
Ilham Maulana ◽  
Suhendrayatna Suhendrayatna ◽  
Ismail Ismail
Keyword(s):  
Photocatalytic Decomposition ◽  
Precipitation Method ◽  
Precipitation Process ◽  
Tem Analysis ◽  
Characterization Methods ◽  
Zno Particles ◽  
Doped Zno ◽  
Co Precipitation ◽  
Fiberglass Cloth

Lousy odor is severe pollution in natural rubber processing industries and the air pollution treatment by using photocatalytic decomposition method has not much known. This study aims to explore the photocatalyst preparation and characterization of Fe doped ZnO immobilized on fiberglass cloth. Fe doped ZnO was prepared both with and without co-precipitation agent of NaOH. Both methods confirmed the metal existence and gave crystallite catalyst particles with mean diameters of 50 nm according to XRD characterization methods. SEM-EDS analysis showed Fe-ZnO particles prepared without co-precipitation were less aggregated particles than those made with the other method. EDS data identified the elemental composition of Zn, Fe, and O, and the fiberglass cloth composition, including Si and Mg. In the co-preparation method, sodium was always existed along with Fe and ZnO. DR-UV analysis showed the bandgap of Fe-ZnO was 3.20 and 3.22 eV without and with co-precipitation methods, respectively. TEM analysis of the catalyst slurry shows all particles were agglomerated in both preparations. Spherical-like particles existed non-precipitation method, and a spherical- and rod particle shapes were detected in co-precipitation preparation. The non-co-precipitation process was a preparable step in immobilization of the Fe-ZnO particles onto fiberglass cloth

Synthesis and Characterization of Nano Cerium Oxide by Surfactant-Assisted Precipitation Method

2012 ◽  
Vol 268-270 ◽  
pp. 180-183 ◽  
Author(s):  
Jun Teng Shang ◽  
Min Yang ◽  
Wan Long Zhang ◽  
Cong Tan ◽  
Dian Jun Han
Keyword(s):  
Cerium Oxide ◽  
Sol Gel ◽  
Sodium Dodecyl ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Hydrothermal Route ◽  
Experimental Conditions ◽  
Nanocrystalline Ceria ◽  
Single Factor Experiment

Cerium oxide is an important material having been applied to a variety of commercial fields. Many methods such as precipitation, hydrothermal route and sol-gel techniques have been used to produce the nanocrystalline ceria. This study, based on the precipitation method, used ceric nitrate as cerium source, anionic surfactant (sodium dodecyl sulphate) as template, and urea as the precipitating agent to synthesize ceria. The effects of several factors, such as the molar ratio of reactants and reaction temperature on the morphology and crystal structure of ceria were investigated, which were determined by XRD and SEM methods. According to the results, 70°C is best experimental conditions and preferable molar ratio of chemicals mentioned above is 1:2:30 for single factor experiment.

Orientation dependence of transport property and microstructural characterization of Al-doped ZnO ceramics

2007 ◽  
Vol 55 (14) ◽  
pp. 4753-4757 ◽  
Author(s):  
Hisashi Kaga ◽  
Yoshiaki Kinemuchi ◽  
Huseyin Yilmaz ◽  
Koji Watari ◽  
Hiromi Nakano ◽  
...  
Keyword(s):  
Transport Property ◽  
Microstructural Characterization ◽  
Orientation Dependence ◽  
Doped Zno ◽  
Zno Ceramics

Homogeneous precipitation synthesis and conductive properties of Ga-doped ZnO nanopowders

2015 ◽  
Vol 26 (7) ◽  
pp. 5433-5439
Author(s):  
Ji Zheng ◽  
Shuang Zhao ◽  
Liang Lu ◽  
Xuejia Liu ◽  
Yangyang Song ◽  
...  
Keyword(s):  
Homogeneous Precipitation ◽  
Doped Zno ◽  
Precipitation Synthesis ◽  
Conductive Properties

Characterization of designed, transparent and conductive Al doped ZnO particles and their utilization in conductive polymer composites

2020 ◽  
Vol 374 ◽  
pp. 214-222
Author(s):  
Pinar Sengun ◽  
M. Tumerkan Kesim ◽  
Mujdat Caglar ◽  
Umut Savaci ◽  
Servet Turan ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Conductive Polymer ◽  
Conductive Polymer Composites ◽  
Zno Particles ◽  
Doped Zno

scholarly journals Purification and characterization of subcomponent C1q of the first component of bovine complement

1979 ◽  
Vol 177 (2) ◽  
pp. 531-540 ◽  
Author(s):  
R. Duncan Campbell ◽  
Nuala A. Booth ◽  
John E. Fothergill
Keyword(s):  
Sodium Dodecyl ◽  
Molar Ratio ◽  
High Yield ◽  
Molecular Characteristics ◽  
Haemolytic Activity ◽  
Reducing Conditions ◽  
Equilibrium Sedimentation ◽  
Triple Helices ◽  
Polypeptide Chains

Bovine C1q, a subcomponent of the first component of complement, was purified in high yield by a combination of euglobulin precipitation, and ion-exchange and molecularsieve chromatography on CM-cellulose and Ultrogel AcA 34. Approx. 12–16mg can be isolated from 1 litre of serum, representing a yield of 13–18%. The molecular weight of undissociated subcomponent C1q, as determined by equilibrium sedimentation, is 430000. On sodium dodecyl sulphate/polyacrylamide gels under non-reducing conditions, subcomponent C1q was shown to consist of two subunits of mol.wts. 69000 and 62000 in a molar ratio of 2:1. On reduction, the 69000-mol.wt. subunit gave chains of mol.wts. 30000 and 25000 in equimolar ratio, and the 62000-mol.wt. subunit decreased to 25000. The amino acid composition, with a high value for glycine, and the presence of hydroxyproline and hydroxylysine, suggests that there is a region of collagen-like sequence in the molecule. This is supported by the loss of haemolytic activity and the degradation of the polypeptide chains of subcomponent C1q when digested by collagenase. All of these molecular characteristics support the structure of six subunits, each containing three different polypeptide chains, with globular heads connected by collagen triple helices as proposed by Reid & Porter (1976) (Biochem. J.155, 19–23) for human subcomponent C1q. Subcomponent C1q contains approx. 9% carbohydrate; analysis of the degree of substitution of the hydroxylysine residues revealed that 91% are modified by the addition of the disaccharide unit Gal-Glc. Bovine subcomponent C1q generates full C1 haemolytic activity when assayed with human subcomponents C1r and C1s.

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