通过火焰退火提高掺锡赤铁矿纳米片的水分解效率。
Enhancing the water splitting efficiency of Sn-doped hematite nanoflakes by flame annealing.
机构信息
Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremburg, Martensstr. 7, 91058 Erlangen (Germany), Fax: (+49) 9131 85 275 82.
出版信息
Chemistry. 2014 Jan 3;20(1):77-82. doi: 10.1002/chem.201303427. Epub 2013 Dec 11.
The effect of flame annealing on the water-splitting properties of Sn decorated hematite (α-Fe2O3) nanoflakes has been investigated. It is shown that flame annealing can yield a considerable enhancement in the maximum photocurrent under AM 1.5 (100 mW cm(-2)) conditions compared to classic furnace annealing treatments. Optimizing the annealing time (10 s at 1000 °C) leads to a photocurrent of 1.1 mA cm(-2) at 1.23 V (vs. RHE) with a maximum value 1.6 mA cm(-2) at 1.6 V (vs. RHE) in 1 M KOH. The improvement in photocurrent can be attributed to the fast direct heating that maintains the nanoscale morphology, leads to optimized Sn decoration, and minimizes detrimental substrate effects.
火焰退火对 Sn 修饰赤铁矿（α-Fe2O3）纳米片的水分解性能的影响进行了研究。结果表明，与传统的炉退火处理相比，火焰退火可以在 AM 1.5（100 mW cm(-2)）条件下产生相当大的最大光电流增强。优化退火时间（1000°C 下 10 秒）可在 1 M KOH 中在 1.6 V（相对于 RHE）时达到 1.6 mA cm(-2)的最大光电流，在 1.23 V（相对于 RHE）时达到 1.1 mA cm(-2)的光电流。光电流的提高可归因于快速直接加热，该加热保持纳米级形貌，导致优化的 Sn 修饰，并最小化了有害的衬底效应。
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