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Ag+, Fe3+ and Zn2+-intercalated cadmium(II)-metal–organic frameworks for enhanced daylight photocatalysis

机译:Ag + ,Fe 3 + 和Zn 2 + 嵌入的镉(II)-金属-有机骨架增强了日光催化

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Design and synthesis of multi-dimensional metal–organic frameworks are fascinating because MOFs possess intriguing structures and unique properties and exhibit potential applications in photocatalysis. In the present study, we endeavoured to synthesize a new Cd-linked MOF through a simple hydrothermal route. The daylight utilising attributes of the Cd-MOF were enhanced by intercalating Ag+, Fe3+, and Zn2+ into the framework via an ion-exchange technique. The optical property shows that Fe3+ stimulates the photo response in the visible region, whereas Ag+ and Zn2+ stimulate the photo response in the ultraviolet light region. Photocatalytic efficiency of the developed MOFs was investigated by degradation of 2-CP under daylight illumination. The Cd-MOFs intercalated with Fe3+ exhibit excellent photocatalysis as compared to the rest, degrading 93% of 2-CP in 5 h of illumination. The intercalation of Fe3+ onto the Cd-MOF significantly reduced the energy gap of the pure MOF; this led to an increased formation of reactive oxygen species driven by the electrons (e?) and holes (h+). Thus, the developed modified MOF clearly demonstrated its capability as a daylight photocatalyst as compared to the existing conventional photocatalysts.
机译:多维金属有机框架的设计和合成引人入胜,因为MOF具有引人入胜的结构和独特的性能,并在光催化领域具有潜在的应用。在本研究中,我们努力通过简单的水热途径合成新的Cd连接的MOF。通过插入Ag + ,Fe 3 + 和Zn增强Cd-MOF的日光利用属性通过离子交换技术将 2 + 放入框架。光学性质表明,Fe 3 + 刺激可见光区域的光响应,而Ag + 和Zn 2 + 刺激紫外线区域的光响应。通过在日光下降解2-CP来研究已开发MOF的光催化效率。嵌入Fe 3 + 的Cd-MOFs与其余的相比表现出优异的光催化作用,在光照5小时内降解了2-CP的93%。 Fe 3 + 插在Cd-MOF上可显着减小纯MOF的能隙。这导致由电子(e )和空穴(h + )。因此,与现有的常规光催化剂相比,开发的改性MOF清楚地证明了其作为日光光催化剂的能力。

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