One-Step Hydrothermal Synthesis and Characterization of ZnO Nanopowders

2011 ◽  
Vol 110-116 ◽  
pp. 1928-1933 ◽  
Author(s):  
Yan Xiang Wang ◽  
Xiao Yan Li ◽  
Jian Sun ◽  
Yao Hui Hu
Keyword(s):  
Hydrothermal Synthesis ◽  
Raw Materials ◽  
Zno Nanorods ◽  
Synthesis Temperature ◽  
Molar Concentration ◽  
Zno Nanosheets ◽  
Length Width ◽  
One Step ◽  
Lower Temperature

In the paper, ZnO nanopowders were synthesized by one-step hydrothermal synthesis using zinc acetate and sodium hydroxide as raw materials. The influences of molar concentration of NaOH and synthesis temperature on the properties of ZnO nanopowders were investigated. XRD and FSEM were used to characterize ZnO nanopowders. The results showed that; when the molar concentration of NaOH was 0.05 mol/L, 1mol/L and 2mol/L, ZnO micrometer powders were obtained. When the molar concentration of NaOH was 4mol/L, ZnO nanorods or nanosheets were obtained with different reaction temperature. When the temperature was 220°C, ZnO nanorods with the length of 500nm and diameter of 100nm, were synthesised. Pure ZnO nanopowders can be obtained at lower temperature of 100°C by using one-step hydrothermal synthesis. When the synthesis temperature was 100°C and the molar concentration of NaOH was 4mol/L, ZnO nanosheets were produced. The length, width and thickness of ZnO nanosheets were about 800 nm, 500nm and 80nm, respectively.

Preparation of ZnO Nanopowders by One-Step Hydrothermal Synthesis

2011 ◽  
Vol 412 ◽  
pp. 21-24
Author(s):  
Yan Xiang Wang ◽  
Jian Sun ◽  
Xiao Yan Li
Keyword(s):  
Polyethylene Glycol ◽  
Raw Materials ◽  
Zno Nanorods ◽  
Synthesis Temperature ◽  
Soft Template ◽  
Peg 400 ◽  
Zno Nanosheets ◽  
Length Width ◽  
One Step ◽  
Soft Templates

In the paper, ZnO nanopowders were synthesized by using zinc acetate and sodium hydroxide as raw materials. The influences of different soft templates and synthesis temperature on the properties of ZnO nanopowders were investigated. The results showed that: when using the polyethylene glycol (PEG (400)) or polyvinyl alcohol (PVA) as soft template, the ZnO nanoparticles with the diameter about 100nm were obtained, whereas the ZnO nanorods which the length and diameter were 300nm and 150nm respectively were obtained without soft template. When the synthesis temperature was 220°C and 70°C, the ZnO nanorods were obtained. When the temperature was 100°C, the ZnO nanosheets were produced, and the length, width and thickness of ZnO nanosheets were about 800 nm, 500nm and 80nm, respectively. When the temperature was 90°C, the ZnO nanosheets composed with nanorods were prepared.

Preparation and Characterization of SnO2/Ag Hollow Microsphere via a Convenient Hydrothermal Route

2016 ◽  
Vol 16 (4) ◽  
pp. 4115-4119 ◽  
Author(s):  
Xiuqing Qiao ◽  
Fuchao Hu ◽  
Dongfang Hou ◽  
Dongsheng Li
Keyword(s):  
Hydrothermal Synthesis ◽  
Ag Nanoparticles ◽  
Photocatalytic Performance ◽  
Raw Materials ◽  
Synthesis Method ◽  
Hollow Microsphere ◽  
Physical Contact ◽  
Hydrothermal Route ◽  
One Step

SnO2/Ag hollow microsphere, assembled form SnO2 and Ag nanoparticles, was synthesized via a facile one-step hydrothermal synthesis method using Na2SnO3.3H2O, CO(NH2)2 and AgNO3 as raw materials. XRD, SEM, and TEM results revealed that the obtained SnO2/Ag hollow microsphere with diameters of ca.3∼5 μm was built from uniformly distributed rutile SnO2 and cubic Ag nanoparticles. Moreover, XPS results indicate the existence of strong interaction between Ag and SnO2 nanoparticles, rather than simply physical contact, endowing the SnO2/Ag hollow microspheres with excellent photocatalytic performance in the degradation of RhB solution under visible light irradiation.

Physico-chemical characterization of Cu2+-exchanged sepiolite

Clay Minerals ◽  
1985 ◽  
Vol 20 (4) ◽  
pp. 467-475 ◽  
Author(s):  
A. Corma ◽  
J. Pérez-Pariente ◽  
J. Soria
Keyword(s):  
Chemical Characterization ◽  
Tetrahedral Symmetry ◽  
Pyramidal Geometry ◽  
Physico Chemical ◽  
One Step ◽  
Lower Temperature ◽  
Coordinated Water ◽  
Square Pyramidal Geometry ◽  
Different Levels

AbstractCopper-sepiolites exchanged at different levels have been studied by ESR, IR, and TG. The results indicate that in the unheated samples the Cu2+ ions are located in octahedral edge positions. After dehydration, the Cu2+ ions occur in two positions with different environments. Some of the Cu2+ ions lose the two molecules of coordinated water in one step, at low dehydration temperatures, and adopt a square pyramidal geometry. Other Cu2+ ions lose the coordination water in two steps, at lower temperature than the natural sepiolite, and adopt a tetrahedral symmetry.

Microwave-assisted hydrothermal synthesis and characterization of ZnO nanorods

2015 ◽  
Vol 148 ◽  
pp. 362-368 ◽  
Author(s):  
K. Ocakoglu ◽  
Sh.A. Mansour ◽  
S. Yildirimcan ◽  
Ahmed A. Al-Ghamdi ◽  
F. El-Tantawy ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Zno Nanorods ◽  
Synthesis And Characterization ◽  
Microwave Assisted

One-step hydrothermal synthesis and characterization of LiNi0.5Mn0.5O2nanoparticles

2015 ◽  
Vol 30 (sup4) ◽  
pp. A176-A180
Author(s):  
Tian Wu ◽  
Yunhai Wan ◽  
Qing Huang ◽  
Hui Xia
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization ◽  
One Step

Hydrothermal synthesis and characterization of ZnO nanorods

2005 ◽  
Vol 393 (1-2) ◽  
pp. 80-82 ◽  
Author(s):  
Huiying Wei ◽  
Youshi Wu ◽  
Ning Lun ◽  
Chunxia Hu
Keyword(s):  
Hydrothermal Synthesis ◽  
Zno Nanorods ◽  
Synthesis And Characterization

Synthesis and Characterization of Highly Dispersed and Homogeneous Nano Zinc Oxide Rods

2014 ◽  
Vol 609-610 ◽  
pp. 180-184
Author(s):  
Yu Xia Li ◽  
Zhen Ren ◽  
Jian Ping Guo ◽  
Yun Long Xi
Keyword(s):  
Zno Nanorods ◽  
Synthesis And Characterization ◽  
Preparation Technology ◽  
Nano Zinc Oxide ◽  
Highly Dispersed ◽  
One Step ◽  
Hydrothermal Approach ◽  
Zno Rods ◽  
Nano Zinc

Highly monodispersed ZnO nanorods have been synthesized by the hydrothermal approach with polyacrylamide (PAM) as the template and zinc acetate as the zinc source. Most of these synthesized ZnO rods have diameters of 30 nm~200 nm and lengths of 80 nm~15 μm. The structural characterization of ZnO nanorods was carried out by XRD, TG, FTIR, TEM and SEM. nanoZnO rods can be prepared merely by one step reaction using little template. It indicated that this method can be applied to the commercialization of rod-like ZnO preparation technology.

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