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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >An Integrated Zeolite Membrane/RuO2 Photocatalyst System for Hydrogen Production from Water
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An Integrated Zeolite Membrane/RuO2 Photocatalyst System for Hydrogen Production from Water

机译：沸石膜/ RuO2集成光催化系统从水中制氢

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摘要

A zeolite Y membrane on a RuO2 containing alumina support for photochemical applications is described. Nanofingers of ruthenium oxide are assembled within the alumina support by thermal decomposition of ruthenium dodecacarbonyl followed by oxidation of the metal. Hydrogen evolution was monitored on the "dark" alumina side upon visible light illumination of a solution of sensitizer Ru(bpy)_3~(2+), electron acceptor N,N'-trimethylene-2,2'-bipyridinium (DQ~(2+)), and sacrificial electron donor EDTA on the zeolite side of the membrane. The zeolite was ion-exchanged with DQ~(2+), and propylviologen sulfonate (PVS) was present in solution on the alumina side of the membrane. It is proposed that upon photoexcitation, DQ~(+ centre dot) radical is formed in solution on the zeolite side, which can exchange charge with DQ~(2+) in the zeolite. Charge diffusion via self-exchange of electrons within the DQ~(2+)/zeolite leads to charge migration onto the zeolite/alumina interface of the membrane and electron donation to PVS. Hydrogen is produced by the reduction of water by the PVS radicals on the RuO2 catalysts. This study demonstrates an architecture for photoinitiated spatial separation of charge across an ~4 mu m thick microporous membrane, along with utilization of the charge to produce H_2 from water.
机译：描述了用于光化学应用的含RuO 2的氧化铝载体上的沸石Y膜。通过将十二羰基钌热分解，然后氧化金属，将氧化钌的纳米指组装在氧化铝载体中。在可见光照射下，敏化剂Ru（bpy）_3〜（2+），电子受体N，N'-三亚甲基-2,2'-联吡啶（DQ〜（ 2+）），并在膜的沸石侧提供牺牲电子给体EDTA。沸石与DQ〜（2+）进行离子交换，溶液中的紫铝磺酸丙酯（PVS）存在于膜的氧化铝侧。提出在光激发下，在沸石一侧的溶液中形成DQ〜（+中心点）自由基，该自由基可以与沸石中的DQ〜（2+）交换电荷。电荷通过DQ〜（2 +）/沸石中电子的自交换而扩散，导致电荷迁移到膜的沸石/氧化铝界面上，并且电子被提供给PVS。氢气是通过RuO2催化剂上的PVS自由基还原水而产生的。这项研究证明了一种结构，该结构可用于在约4微米厚的微孔膜上光引发电荷的空间分离，以及利用电荷从水中生产H_2。

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