Analysis of photocatalytic performance of nanostructured pyrogenic titanium dioxide powders in view of their polydispersity and phase transition: Critical anatase particle size as a factor for suppression of charge recombination
Analysis of photocatalytic performance of nanostructured pyrogenic titanium dioxide powders in view of their polydispersity and phase transition: Critical anatase particle size as a factor for suppression of charge recombination
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从多分散性和相变角度分析纳米结构热解二氧化钛粉末的光催化性能:临界锐钛矿粒径作为抑制电荷复合的因素
DOI:
10.1016/j.cej.2013.05.038
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发表时间:
2013
影响因子:
15.1
通讯作者:
Deubener
中科院分区:
文献类型:
--
作者:
Moiseev;Krichevskaya;Deubener
Series of TiO2nanopowders from flame aerosol synthesis with average particle size from 7.1 to 21 nm with increased rutile content were studied for particle size distribution (PSD) and anatase-to-rutile transition to be correlated with their photocatalytic performance. The certain particles’ growth regime favours the formation of defect-rich anatase nanoparticles which were found to condition the overall reactivity of polydispersed nanostructured powders. Two crucial roles of oxygen vacancies as key characteristics of nanoparticles are discussed: (a) they are responsible for anatase-to-rutile transition and (b) are vital for the adsorption of oxygen as electron acceptor, i.e. for the photoelectrochemical efficiency. The linear dependence of the photocatalytic oxidation reaction rate constant on the content of the specific anatase particles fraction amenable to phase transition was revealed by the regression analysis.
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影响因子:
2.8
作者:
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通讯作者:
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DOI:
--
发表时间:
2010
期刊:
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通讯作者:
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DOI:
--
发表时间:
1997
期刊:
影响因子:
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作者:
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