Photocatalytic hydrogen production by biomimetic indium sulfide using Mimosa pudica leaves as template
Photocatalytic hydrogen production by biomimetic indium sulfide using Mimosa pudica leaves as template
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DOI：
10.1016/j.ijhydene.2018.12.043
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发表时间：
2019-01
影响因子：
7.2
通讯作者：
Omar A. Carrasco-Jaim;Ruben Ahumada-Lazo;P. Clark;C. Gómez-Solís;S. Fairclough;S. Haigh;M. Leontiadou;Karsten Handrup;L. Torres-Martínez;W. Flavell
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文献类型：
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作者：
Omar A. Carrasco-Jaim;Ruben Ahumada-Lazo;P. Clark;C. Gómez-Solís;S. Fairclough;S. Haigh;M. Leontiadou;Karsten Handrup;L. Torres-Martínez;W. Flavell
首次以含羞草叶为模板，采用模板辅助水热法合成了仿生缺硫硫化铟（In2.77S4）。通过物理化学表征确定了该模板在改变半导体颗粒形态方面的效果，揭示了用该模板合成的样品的表面积增加、微球尺寸和孔径减小以及孔体积密度增加。 X射线光电子能谱（XPS）分析表明，在用模板合成的样品中，硫化铟表面存在有机硫（单键O/单键C/单键H）和硫氧化物（单键SO2、SO32−、SO42−）。仿生硫化铟还显示出大量的铁作为存在于含羞草叶子上的污染物引入。这些硫和铁物质的存在分别作为牺牲试剂和促进模板颗粒表面上的水氧化，从而有利于产氢的光催化活性。与优化制备的仿生硫化铟和无有机模板合成的硫化铟相比，光催化产氢率分别为 73 和 22 µmol g−1，表明模板样品提高了三倍。
Biomimetic sulfur-deficient indium sulfide (In2.77S4) was synthesized by a template-assisted hydrothermal method using leaves ofMimosa pudicaas a template for the first time. The effect of this template in modifying the morphology of the semiconductor particles was determined by physicochemical characterization, revealing an increase in surface area, decrease in microsphere size and pore size and an increase in pore volume density in samples synthesized with the template. X-ray photoelectron spectroscopy (XPS) analysis showed the presence of organic sulfur (Ssingle bondO/Ssingle bondC/Ssingle bondH) and sulfur oxide species (single bondSO2, SO32−, SO42−) at the surface of the indium sulfide in samples synthesized with the template. Biomimetic indium sulfide also showed significant amounts of Fe introduced as a contaminant present on theMimosa pudicaleaves. The presence of these sulfur and iron species favors the photocatalytic activity for hydrogen production by their acting as a sacrificial reagent and promoting water oxidation on the surface of the templated particles, respectively. The photocatalytic hydrogen production rates over optimally-prepared biomimetic indium sulfide and indium sulfide synthesized without the organic template were 73 and 22 μmol g−1, respectively, indicating an improvement by a factor of three in the templated sample.