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Role of Silver Nanoclusters in the Enhanced Photocatalytic Activity of Cerium Oxide Nanoparticles
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2018-07-10 , DOI: 10.1002/ejic.201800230 Boby Samai 1 , Sayantani Chall 2 , Soumya Sundar Mati 3 , Subhash Chandra Bhattacharya 1
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2018-07-10 , DOI: 10.1002/ejic.201800230 Boby Samai 1 , Sayantani Chall 2 , Soumya Sundar Mati 3 , Subhash Chandra Bhattacharya 1
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We have designed a silver‐nanocluster‐supported cerium oxide nanoparticle composite (AgNC/CeO2) to overcome the inapplicability of CeO2 as a photocatalyst due to a large band gap. A hydrothermal‐based synthetic strategy was followed to prepare spherical cerium oxide nanoparticles (CeO2 NPs). The AgNCs were synthesized separately. In the final step, silver‐nanocluster‐supported CeO2 nanoparticle composites were fabricated by simply mixing CeO2 and various concentrations of AgNC and stirring for 48 hours. The as‐prepared AgNC/CeO2 nanocomposites were employed as photocatalysts to study the degradation of the dye Acridine Red (AR) under UV light illumination. The results showed that the photocatalytic activities of the AgNC/CeO2 were enhanced several times compared with pure CeO2 NPs, even with a very low loading of AgNC (ca. 3 %). The increased catalytic activity of the AgNC/CeO2 nanocomposites was interpreted mechanistically by including the participation of reactive oxygen species, and corroborated experimentally. Thus, the AgNCs provide a convenient approach to improving the photocatalytic activity of CeO2 NPs.
中文翻译：
银纳米团簇在氧化铈纳米颗粒增强的光催化活性中的作用
我们设计了一种由银纳米簇支撑的氧化铈纳米粒子复合材料（AgNC / CeO 2），以克服由于带隙较大而导致CeO 2作为光催化剂的不适用性。遵循基于水热的合成策略来制备球形氧化铈纳米颗粒（CeO 2 NPs）。AgNCs是分别合成的。在最后一步中，只需将CeO 2和各种浓度的AgNC混合并搅拌48小时，即可制得银纳米簇支撑的CeO 2纳米颗粒复合材料。准备好的AgNC / CeO 2纳米复合材料被用作光催化剂以研究染料UV啶红（AR）在紫外光照射下的降解。结果表明，与纯CeO 2 NP相比，AgNC / CeO 2的光催化活性提高了数倍，即使AgNC的负载量非常低（约3％）。AgNC / CeO 2纳米复合材料催化活性的提高是通过包括活性氧的参与来进行机械解释的，并在实验上得到了证实。因此，AgNCs提供了一种方便的方法来提高CeO 2 NPs的光催化活性。
更新日期：2018-07-10
中文翻译：
银纳米团簇在氧化铈纳米颗粒增强的光催化活性中的作用
我们设计了一种由银纳米簇支撑的氧化铈纳米粒子复合材料（AgNC / CeO 2），以克服由于带隙较大而导致CeO 2作为光催化剂的不适用性。遵循基于水热的合成策略来制备球形氧化铈纳米颗粒（CeO 2 NPs）。AgNCs是分别合成的。在最后一步中，只需将CeO 2和各种浓度的AgNC混合并搅拌48小时，即可制得银纳米簇支撑的CeO 2纳米颗粒复合材料。准备好的AgNC / CeO 2纳米复合材料被用作光催化剂以研究染料UV啶红（AR）在紫外光照射下的降解。结果表明，与纯CeO 2 NP相比，AgNC / CeO 2的光催化活性提高了数倍，即使AgNC的负载量非常低（约3％）。AgNC / CeO 2纳米复合材料催化活性的提高是通过包括活性氧的参与来进行机械解释的，并在实验上得到了证实。因此，AgNCs提供了一种方便的方法来提高CeO 2 NPs的光催化活性。
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