Heterogeneous growth mechanism of ZnO nanostructures and the effects of their morphology on optical and photocatalytic properties

CrystEngComm ◽  
2017 ◽  
Vol 19 (24) ◽  
pp. 3299-3312 ◽  
Author(s):  
Abdo Hezam ◽  
K. Namratha ◽  
Q. A. Drmosh ◽  
Bananakere Nanjegowda Chandrashekar ◽  
Kishor Kumar Sadasivuni ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Photocatalytic Properties ◽  
Zno Nanostructures

SHAPE EVOLUTION IN ONE-DIMENSIONAL ZnO NANOSTRUCTURES GROWN FROM ZnO NANOPOWDER SOURCE: VAPOR–LIQUID–SOLID VERSUS VAPOR–SOLID GROWTH MECHANISMS

2011 ◽  
Vol 10 (01n02) ◽  
pp. 75-79 ◽  
Author(s):  
SOUMEN DHARA ◽  
P. K. GIRI
Keyword(s):  
Growth Mechanism ◽  
Growth Temperature ◽  
Shape Evolution ◽  
Zno Nanostructures ◽  
Growth Mechanisms ◽  
Vapor Liquid Solid ◽  
One Dimensional ◽  
Zno Nanopowder ◽  
Simultaneous Growth ◽  
Vapor Liquid

Here we report on the growth and evolution of ZnO nanowires grown from ZnO nanopowder as a source material using a horizontal muffle furnace. The shape evolution has been studied with variation in growth temperature and zinc vapor pressure. The structural analysis on these nanostructures shows c-axis oriented aligned growth. Scanning electron microscopy imaging of these nanostructures revealed the shape evolution from nanowires to nanoribbons and then to nanorods as the growth temperature increases from 650°C to 870°C. At 650°C, only vertical nanowires have been observed and with increase in growth temperature nanowires transform to nanoribbons and then to nanorods at 870°C. And we also observed simultaneous growth of nanorods and nanoribbons under a specific growth condition. We believe that these nanowires and nanorods were formed by vapor–liquid–solid growth mechanism (catalyst-mediated growth), whereas nanoribbons were grown by vapor–solid growth mechanism (without the aid of a metal catalyst). We observed simultaneous occurrence of vapor–liquid–solid and vapor–solid growth mechanisms at a particular growth temperature. These ZnO nanowires exhibit bound exciton related UV emission at ~379 nm, and defect-emission band in the visible region. Possible growth mechanism, shape evolution, and simultaneous growth of two types of one-dimensional ZnO nanostructures under the same growth condition are discussed.

Growth and photocatalytic properties of one-dimensional ZnO nanostructures prepared by thermal evaporation

2009 ◽  
Vol 44 (10) ◽  
pp. 1954-1958 ◽  
Author(s):  
Hongwei Yan ◽  
Jianbo Hou ◽  
Zhengping Fu ◽  
Beifang Yang ◽  
Pinghua Yang ◽  
...  
Keyword(s):  
Thermal Evaporation ◽  
Photocatalytic Properties ◽  
Zno Nanostructures ◽  
One Dimensional

Effects of organic solvents on morphologies, photoluminescence, and photocatalytic properties of ZnO nanostructures

2019 ◽  
Vol 14 (11) ◽  
pp. 1146-1150
Author(s):  
Ce Liang ◽  
Xian He ◽  
Zhiwei Cai ◽  
Gang Chang ◽  
Sen Lin ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Photocatalytic Properties ◽  
Zno Nanostructures

Fe2O3–TiO2nanosystems by a hybrid PE-CVD/ALD approach: controllable synthesis, growth mechanism, and photocatalytic properties

CrystEngComm ◽  
2015 ◽  
Vol 17 (32) ◽  
pp. 6219-6226 ◽  
Author(s):  
Davide Barreca ◽  
Giorgio Carraro ◽  
Michael E. A. Warwick ◽  
Kimmo Kaunisto ◽  
Alberto Gasparotto ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Photocatalytic Properties ◽  
Controllable Synthesis
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