Kirchberg Kristin, Wang Songcan, Wang Lianzhou, Marschall Roland
Institute of Physical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany.
School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD 4072, Australia.
Chemphyschem. 2018 Sep 18;19(18):2313-2320. doi: 10.1002/cphc.201800506. Epub 2018 Jun 21.
Mesoporous ZnFe O 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 ZnFe O 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 ZnFe O photoanodes.
通过浸涂法，利用两种不同的嵌段共聚物模板的蒸发诱导自组装制备了介孔ZnFe₂O₄光阳极，以研究孔几何形状对这些储量丰富的光电极的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PIB3000作为模板，由于聚合物稳定性不同，在相同的制备条件下会导致不同的孔形态。有趣的是，介孔ZnFe₂O₄中的孔形态对光电化学性能的影响较小。相反，通过优化温度处理获得的充分发育的晶域在所研究的样品中产生了最大的光电化学性能。这证明了合成高性能介孔ZnFe₂O₄光阳极无需昂贵的定制聚合物软模板。
