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首页> 外文期刊>Catalysis science & technology >Distinctive organized molecular assemble of MoS2, MOF and Co3O4, for efficient dye-sensitized photocatalytic H-2 evolution
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Distinctive organized molecular assemble of MoS2, MOF and Co3O4, for efficient dye-sensitized photocatalytic H-2 evolution

机译：独特的组织分子组装的二硫化钼,财政部和Co3O4高效涂料光催化氢进化

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摘要

Stable and efficient photocatalyst has been a key research goal in recent years. Based on the dominant performances of MoS2, metal organic frameworks (MOFs) and Co3O4 themselves, for example, MoS2 has superior electronic properties, MOFs have a large specific surface area and Co3O4 has a suitable band gap to give a visible light response, and with a view to overcome the disadvantages of MoS2, MOFs and Co3O4 individually, for example, the poor stability of MOFs, cobalt ions being easily released from Co3O4, a distinctive organized molecular assemble of MoS2, MOF and Co3O4 was successfully designed and assembled with the shape of a leaf. Namely, the special structure of MoS2-MOF appears as a leaf, and Co3O4 looks like the venation. More importantly, an efficient dye-sensitized photocatalytic H-2 evolution was obtained. For instance, when the content of Co3O4 was at 30%, the photocatalytic hydrogen production could reached up to 450.13 mol in the EY-sensitized system under visible light irradiation within 5 hours. Moreover, the organized molecular assembled Co3O4 greatly improved the stability of the photocatalyst. Here, MoS2 and a metal organic framework (MOF) were combined to form a new structure catalyst MoS2-MOF, which provided a large specific surface area and sufficient active sites, the MoS2 gave excellent electronic and optoelectronic properties and greatly improved the electron transport efficiency. The MoS2-MOF/Co3O4 catalyst has a great fluorescence quenching rate, and the lifetime of the electron is also greatly improved. A peculiar synergetic effect of MoS2 and Co3O4 on the MOF for photocatalytic hydrogen evolution is revealed and the synergy of MoS2 and Co3O4 is the most critical factor. The above phenomena are supported by a series of characterization results such as SEM, XRD, TEM, EDX, XPS, BET, UV-vis DRS, FTIR, transient fluorescence and electro-chemistry, and so forth and the results of which were in good agreement with each other.
机译：稳定、高效的光催化剂一直是关键近年来的研究目标。主要表现的二硫化钼、金属有机的框架(mof)和Co3O4本身二硫化钼具有优越的电子特性,财政部有很大的比表面积和Co3O4有一个合适的带隙给可见光吗反应,以克服缺点的二硫化钼,财政部和Co3O4例如,单独的稳定性差财政部、钴离子很容易被释放Co3O4,独特的分子组装设计的二硫化钼、财政部和Co3O4成功用一片叶子的形状和组装。MoS2-MOF出现的特殊结构叶,Co3O4脉络。重要的是,一个高效的涂料光催化氢进化。实例,Co3O4的含量为30%时,的光催化制氢EY-sensitized达到450.13摩尔系统在可见光照射在5个小时。组装Co3O4大大提高的稳定性光催化剂。框架(MOF)联合成立一个新的提供了一个结构催化剂MoS2-MOF大比表面积和足够的活跃网站,二硫化钼给优秀的电子和光电性能大大提高电子传递效率。有一个很好的荧光MoS2-MOF / Co3O4催化剂淬火速率和电子的寿命也大大提高。二硫化钼和Co3O4对财政部的影响光催化氢进化是显示二硫化钼和Co3O4是最的协同作用关键因素。由一系列的表征结果如SEM、XRD、TEM、EDX、XPS,打赌,紫外可见DRS,红外光谱、瞬态荧光电化学等等,结果是在良好的协议。

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