Journal
NANOSCALE
Volume 4, Issue 12, Pages 3761-3767Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2nr30371j
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Funding
- National Basic Research Program of China [2009CB939901]
- National Nature Science Foundation [90922016, 10979047, 11079004]
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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-BiVO4 quantum tubes-graphene nanocomposites that exhibit unprecedented visible-light-driven photocatalytic activities, over 20 times faster than that of commercial P25 or bulk BiVO4 and roughly 1.5 times more active than that of bare m-BiVO4 quantum tubes. Notably, the unusual photoreactivities arise from the synergistic effects between the microscopic crystal structure of m-BiVO4 and macroscopic morphological features of ordered m-BiVO4 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.
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