Highly efficient visible-light-driven photocatalytic activities in synthetic ordered monoclinic BiVO4 quantum tubes-graphene nanocomposites.
Highly efficient visible-light-driven photocatalytic activities in synthetic ordered monoclinic BiVO4 quantum tubes-graphene nanocomposites.
复制标题
DOI：
10.1039/c2nr30371j
复制
发表时间：
2012-05
期刊：
影响因子：
6.7
通讯作者：
Yongfu Sun;B. Qu;Qinghua Liu;Shan Gao;Zixiang Yan;Wensheng Yan;B. Pan;Shiqiang Wei;Yi Xie
中科院分区：
文献类型：
--
作者：
Yongfu Sun;B. Qu;Qinghua Liu;Shan Gao;Zixiang Yan;Wensheng Yan;B. Pan;Shiqiang Wei;Yi Xie
光催化净化污水是缓解日益严重的水资源危机的一种很有前途的方法。尽管付出了巨大的努力，但开发低成本、高活性的可见光驱动光催化剂仍然是一个巨大的挑战。在此，我们首次报道了有序m-BiVO(4)量子管-石墨烯纳米复合材料的设计和合成，该复合材料具有前所未有的可见光驱动光催化活性，比商用P25或本体BiVO(4)快20倍以上，比裸m-BiVO(4)量子管的活性高约1.5倍。值得注意的是，不同寻常的光反应性源于m-BiVO(4)的微观晶体结构与有序m-BiVO(4)量子管和二维石墨烯片的宏观形态特征之间的协同效应。这些结构特征有助于提供更多的光催化反应位点，扩大光响应范围，同时提高电荷传输和分离效率。简而言之，这项工作不仅为制造高效稳定的石墨烯基纳米复合材料提供了一种简单直接的策略，而且证明了这些独特的结构是显著提高其可见光驱动光活性的优秀平台，在净化污染水资源领域具有很大的应用前景。
Photocatalytic purification of polluted water is a very promising way to alleviate the increasingly serious water resources crisis. Despite tremendous efforts, developing visible-light-driven photocatalysts with high activity at low cost still remains a great challenge. Herein, we report for the first time the design and synthesis of ordered m-BiVO(4) quantum tubes-graphene nanocomposites that exhibit unprecedented visible-light-driven photocatalytic activities, over 20 times faster than that of commercial P25 or bulk BiVO(4) and roughly 1.5 times more active than that of bare m-BiVO(4) quantum tubes. Notably, the unusual photoreactivities arise from the synergistic effects between the microscopic crystal structure of m-BiVO(4) and macroscopic morphological features of ordered m-BiVO(4) quantum tubes and two-dimensional graphene sheets. These structural features help to provide increased photocatalytic reaction sites, extended photoresponding range, enhanced charge transportation and separation efficiency simultaneously. Briefly, this work not only provides a simple and straightforward strategy for fabricating highly efficient and stable graphene-based nanocomposites, but also proves that these unique structures are excellent platforms for significantly improving their visible-light-driven photoactivities, holding great promise for their applications in the field of purifying polluted water resources.