Kinetically restraining aggregation of ZnS nanocrystals and the effect on photocatalysis
被引:15
作者:
Feng, Shouai
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Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R ChinaChinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
Feng, Shouai
[1
,2
]
Zhao, Jianghong
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Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R ChinaChinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
Zhao, Jianghong
[1
]
Zhu, Zhenping
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Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R ChinaChinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
Zhu, Zhenping
[1
]
机构:
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
A common problem in the fabrication of nanostructures is their undesired aggregation due to their high surface free energy. Here we show that a combinatorial control of reaction kinetic parameters such as feeding rate of reactant and reaction temperature can effectively restrain the aggregation of ZnS nanocrystals. The restraining process is associated with a stabilization of ZnS nanocrystal surfaces. Slowing down the feeding rate of reactants allows formed ZnS nanocrystals to get enough time to stabilize their surfaces. The stabilization of ZnS nanocrystal surfaces is further improved by suitably increasing reaction temperature. As a result, well dispersed and uniform ZnS nanocrystals with diameter of 4-6 nm are obtained with a common reaction between Zn(NO3)(2) and Na2S, which is normally viewed to easily cause an aggregation. The results of photocatalytic degradation of methylene blue show that the aggregation restraint can effectively improve the activity of ZnS nanocrystals. (C) 2008 Elsevier B.V. All rights reserved.
机构:
Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, MalaysiaUniv Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
Khiew, PS
;
Radiman, S
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机构:Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
Radiman, S
;
Huang, NM
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机构:Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
Huang, NM
;
Ahmad, MS
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机构:Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
Ahmad, MS
;
Nadarajah, K
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机构:Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
机构:
Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, MalaysiaUniv Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
Khiew, PS
;
Radiman, S
论文数: 0引用数: 0
h-index: 0
机构:Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
Radiman, S
;
Huang, NM
论文数: 0引用数: 0
h-index: 0
机构:Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
Huang, NM
;
Ahmad, MS
论文数: 0引用数: 0
h-index: 0
机构:Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia
Ahmad, MS
;
Nadarajah, K
论文数: 0引用数: 0
h-index: 0
机构:Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Nucl Sci Program, Bangi 43600, Selangor, Malaysia