Mesoporous ZnFe2 O4 Photoanodes with Template-Tailored Mesopores and Temperature-Dependent Photocurrents.
Mesoporous ZnFe2 O4 Photoanodes with Template-Tailored Mesopores and Temperature-Dependent Photocurrents.
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DOI：
10.1002/cphc.201800506
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发表时间：
2018-06
期刊：
影响因子：
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通讯作者：
K. Kirchberg;Songcan Wang;Lianzhou Wang;R. Marschall
中科院分区：
文献类型：
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作者：
K. Kirchberg;Songcan Wang;Lianzhou Wang;R. Marschall
利用两种不同嵌段共聚物模板的蒸发诱导自组装反应，通过浸渍涂敷法制备了介孔ZnFe 2 O 4光阳极，研究了孔的几何形状对这些富地光电极光电化学性能的影响.使用商业嵌段共聚物、三嵌段共聚物Pluronic® F127和二嵌段共聚物PIB 3000作为模板，由于不同的聚合物稳定性，在相同的制备条件下导致不同的孔形态。有趣的是，在介孔ZnFe 2 O 4的孔形态被证明是不太重要的光电化学性能。相反，通过优化的温度处理得到的充分发展的晶畴导致最大的光电化学性能之间的调查样品。这证明了昂贵的、定制的聚合物软模板合成高性能介孔ZnFe 2 O 4光阳极的必要性。
Mesoporous ZnFe2 O4 photoanodes have been prepared via dip-coating utilizing the evaporation-induced self-assembly of two different block-copolymer templates to investigate the influence of pore geometry on the photoelectrochemcial performance of those earth-abundant photoelectrodes. The use of commercial block copolymers, triblock copolymer Pluronic® F127 and the diblock copolymer PIB3000 as templates, leads to different pore morphologies under identical preparation conditions due to different polymer stabilities. Interestingly, pore morphology in mesoporous ZnFe2 O4 turned out to be less important for the photoelectrochemical performance. Contrary, sufficiently developed crystalline domains gained through optimized temperature treatment resulted in maximum photoelectrochemical performance among the investigated samples. This disproves the necessity of expensive, tailor-made polymer soft templates to synthesize high-performing mesoporous ZnFe2 O4 photoanodes.