Highly Solar-Reflective Litchis-Like Core-Shell HGM/TiO2 Microspheres Synthesized by Controllable Heterogeneous Precipitation Method

NANO ◽  
2017 ◽  
Vol 12 (07) ◽  
pp. 1750080 ◽  
Author(s):  
Hu Jin ◽  
Dehua Xu ◽  
Jingling Li ◽  
Kelai Wang ◽  
Zhuoneng Bi ◽  
...  
Keyword(s):  
Heterogeneous Nucleation ◽  
Energy Efficient ◽  
Nucleation And Growth ◽  
Precipitation Method ◽  
Core Shell ◽  
Hollow Glass Microsphere ◽  
Structural Composites ◽  
Heterogeneous Precipitation ◽  
Solar Reflectance ◽  
Nucleation Sites

Hollow glass microsphere (HGM)/TiO2 core-shell structural composites have promising applications in the field of energy efficient solar-reflective paints. In this work, after pretreated with saturated Ca(OH)2 solutions, litchis-like TiO2 shells have been successfully synthesized on HGMs via a controllably heterogeneous precipitation method with Titanium (IV) sulfate (Ti(SO[Formula: see text] and urea as reaction precursors. It is emphasized that the use of urea as the precipitating agent is essential for the heterogeneous nucleation and growth of Ti(OH)4 on HGMs, while the Ca(OH)2 pretreatment provides the heterogeneous nucleation sites on HGMs which promotes the nucleation and growth of Ti(OH)4, and gives rise to large secondary Ti(OH)4 particles, leading to the formation of litchis-like TiO2 shells. The resulted core-shell structural HGM/TiO2 microspheres exhibited highest solar reflectance of [Formula: see text]83%.

Hybrid Au-CdSe and Ag-CdSe Nanoflowers and Core-Shell Nanocrystals via One-Pot Heterogeneous Nucleation and Growth

Small ◽  
2011 ◽  
Vol 7 (23) ◽  
pp. 3299-3307 ◽  
Author(s):  
Khaled M. AbouZeid ◽  
Mona B. Mohamed ◽  
M. Samy El-Shall
Keyword(s):  
Heterogeneous Nucleation ◽  
Nucleation And Growth ◽  
Core Shell ◽  
One Pot

Relaxation-Induced Gettering of Metal Impurities in Silicon: Microscopic Properties of Effective Gettering Sites

1992 ◽  
Vol 262 ◽  
Author(s):  
M. Seibt
Keyword(s):  
Heterogeneous Nucleation ◽  
Point Of View ◽  
Homogeneous Precipitation ◽  
The Core ◽  
Heterogeneous Precipitation ◽  
Metal Impurities ◽  
Cobalt Nickel ◽  
Fundamental Point ◽  
Nucleation Sites ◽  
High Incorporation

ABSTRACTSome gettering processes like internal gettering or backside damage gettering base on heterogeneous precipitation of metal impurities at defects in pre-de ter mined parts of silicon wafers during cooling from high temperatures. We consider microscopic properties of effective heterogeneous nucleation sites for cobalt, nickel and copper impurities from the fundamental point of view of suicide precipitate formation. We follow the basic concept that such gettering sites are defects which allow fast precipitation, i.e. which remove kinetic limitations known from homogeneous precipitation of these impurities at small supersaturation. For Co and Ni it follows that distorted lattice sites in the core of dislocations may establish high incorporation rates of interstitial atoms into suicide particles, whereas for Cu sinks for silicon self-interstitials are suitable gettering sites.

Nucleation Dynamics of Water Nanodroplets

2014 ◽  
Vol 20 (2) ◽  
pp. 407-415 ◽  
Author(s):  
Dipanjan Bhattacharya ◽  
Michel Bosman ◽  
Venkata R.S.S. Mokkapati ◽  
Fong Yew Leong ◽  
Utkur Mirsaidov
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Gold Nanoparticles ◽  
Heterogeneous Nucleation ◽  
Flat Surface ◽  
Nucleation And Growth ◽  
Length Scale ◽  
Transmission Electron ◽  
Nucleation Sites

AbstractThe origin of the condensation of water begins at the nanoscale, a length-scale that is challenging to probe for liquids. In this work we directly image heterogeneous nucleation of water nanodroplets by in situ transmission electron microscopy. Using gold nanoparticles bound to a flat surface as heterogeneous nucleation sites, we observe nucleation and growth of water nanodroplets. The growth of nanodroplet radii follows the power law: R(t)~(t−t0)β, where β~0.2−0.3.

Fabrication of Al2O3@BaFe12O19 core-shell powder by a modified heterogeneous precipitation method

2019 ◽  
Vol 45 (3) ◽  
pp. 3269-3275
Author(s):  
Xiaoyan Yang ◽  
Mengni Ge ◽  
Jianfeng Zhang ◽  
Baoping Jia ◽  
Fan Bu
Keyword(s):  
Precipitation Method ◽  
Core Shell ◽  
Heterogeneous Precipitation ◽  
Shell Powder

Fabrication of α-AlO(OH)·SiO2 with core-shell structures by heterogeneous nucleation-and-growth processing

2005 ◽  
Vol 241 (3-4) ◽  
pp. 412-415 ◽  
Author(s):  
Yue Feng Tang ◽  
Zhi Peng Huang ◽  
Liang Feng ◽  
Yan Feng Chen
Keyword(s):  
Heterogeneous Nucleation ◽  
Nucleation And Growth ◽  
Shell Structures ◽  
Core Shell

Porous and amorphous cobalt hydroxysulfide core–shell nanoneedles on Ti-mesh as a bifunctional electrocatalyst for energy-efficient hydrogen production via urea electrolysis

2021 ◽  
Author(s):  
Yu Jiang ◽  
Shanshan Gao ◽  
Gongchen Xu ◽  
Xiaoming Song
Keyword(s):  
Hydrogen Production ◽  
High Activity ◽  
Energy Efficient ◽  
Bifunctional Catalyst ◽  
Core Shell ◽  
Bifunctional Electrocatalyst ◽  
Urea Electrolysis ◽  
Ti Mesh

Porous and amorphous CoSx(OH)y core–shell nanoneedles covered by numerous ultra-thin small nanosheets are synthesized successfully on Ti-mesh, and act as a high activity and stability bifunctional catalyst for urea electrolysis.

Tunability and dielectric properties of Ba0.55Sr0.45TiO3/MgO composites prepared by heterogeneous precipitation method and sol-gel method

2017 ◽  
Vol 520 (1) ◽  
pp. 75-82
Author(s):  
Hai Jiang ◽  
Xiao-Hong Wang ◽  
Jing Tao ◽  
Hua-Bo Wang ◽  
Fang-yuan Chen ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Sol Gel ◽  
Precipitation Method ◽  
Gel Method ◽  
Sol Gel Method ◽  
Heterogeneous Precipitation
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