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首页> 外文期刊>RSC Advances >Plasmonic Ag decorated CdMoO4 as an efficient photocatalyst for solar hydrogen production
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Plasmonic Ag decorated CdMoO4 as an efficient photocatalyst for solar hydrogen production

机译：等离子银修饰的CdMoO4可作为有效的光催化剂用于太阳能制氢

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The synthesis of Ag-nanoparticle-decorated CdMoO _(4) and its photocatalytic activity towards hydrogen generation under sunlight has been demonstrated. The CdMoO _(4) samples were synthesized by a simple hydrothermal approach in which Ag nanoparticles were in situ decorated on the surface of CdMoO _(4) . A morphological study showed that 5 nm spherical Ag nanoparticles were homogeneously distributed on the surface of CdMoO _(4) particles. The UV/DRS spectra show that the band gap of CdMoO _(4) was narrowed by the incorporation of a small amount of Ag nanoparticles. The surface plasmonic effect of Ag shows broad absorption in the visible region. The enhanced photocatalytic hydrogen production activities of all the samples were evaluated by using methanol as a sacrificial reagent in water under natural sunlight conditions. The results suggest that the rate of photocatalytic hydrogen production using CdMoO _(4) can be significantly improved by loading 2% Ag nanoparticles: i.e. 2465 μmol h ~(?1) g ~(?1) for a 15 mg catalyst. The strong excitation of surface plasmon resonance (SPR) absorption by the Ag nanoparticles was found in the Ag-loaded samples. In this system, the role of Ag nanoparticles on the surface of CdMoO _(4) has been discussed. In particular, the SPR effect is responsible for higher hydrogen evolution under natural sunlight because of broad absorption in the visible region. The current study could provide new insights for designing metal/semiconductor interface systems to harvest solar light for solar fuel generation.
机译：已经证明了银纳米粒子修饰的CdMoO_（4）的合成及其在阳光下对氢产生的光催化活性。通过简单的水热方法合成了CdMoO_（4）样品，在该方法中，将Ag纳米颗粒原位装饰在CdMoO_（4）的表面上。形态学研究表明5 nm球形Ag纳米颗粒均匀地分布在CdMoO_（4）颗粒的表面上。 UV / DRS光谱表明，CdMoO_（4）的带隙通过掺入少量Ag纳米粒子而变窄。 Ag的表面等离子体效应在可见光区域显示出广泛的吸收。在自然阳光条件下，使用甲醇作为水中的牺牲试剂，评估了所有样品增强的光催化制氢活性。结果表明，通过装载2％的Ag纳米颗粒，即15mg催化剂的2465μmolh〜（？1）g〜（？1），可以显着提高使用CdMoO_（4）的光催化产氢速率。在载有Ag的样品中发现了Ag纳米颗粒对表面等离子体共振（SPR）吸收的强烈激发。在该系统中，已讨论了Ag纳米粒子在CdMoO_（4）表面上的作用。特别地，由于在可见光区域的广泛吸收，SPR效应导致自然阳光下更高的氢释放量。当前的研究可以为设计金属/半导体接口系统以收集太阳能以产生太阳能提供新的见解。

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