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    Facile preparation of C, N co-modified Nb2O5 nanoneedles with enhanced visible light photocatalytic activity

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    Type
    Article
    Authors
    Xue, Jiao
    Wang, Runwei cc
    Zhang, Zongtao
    Qiu, Shilun
    KAUST Grant Number
    CRG-1-2012-LAI-009
    Date
    2016
    Permanent link to this record
    http://hdl.handle.net/10754/623542
    
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    Abstract
    C, N co-modified niobium pentoxide (Nb2O5) nanoneedles have been successfully synthesized via a facile hydrothermal method with Niobium Chloride (NbCl5) as a precursor and triethylamine as both the carbon and nitrogen source. The formation process of Nb2O5 nanoneedles has been presented in detail by investigating the effect of the crystallization temperature, the amount of triethylamine and the calcination temperature. The as-prepared Nb2O5 nanoneedles exhibit more efficient photocatalytic activity than commercial Degussa P25 and commercial Nb2O5 towards photodegradation of Rhodamine B (RhB) at a concentration of 10 mg L−1 under visible light. Special chemical species, such as carbonate species and NOX species, that exist on the surface of the as-prepared catalyst could extend the absorption into the visible region and thus enhance the photocatalytic activity of the Nb2O5 nanoneedles. At the same time, the obtained Nb2O5 nanoneedles exhibit excellent stability even after three successive cycles. A possible photodegradation mechanism was proposed and the corresponding photodecomposition process of RhB over the Nb2O5 nanoneedles was elucidated by a reactive species trapping experiment, suggesting that h+ and O2˙− play a major role in the photodegradation of RhB in aqueous solution.
    Citation
    Xue J, Wang R, Zhang Z, Qiu S (2016) Facile preparation of C, N co-modified Nb2O5 nanoneedles with enhanced visible light photocatalytic activity. Dalton Trans 45: 16519–16525. Available: http://dx.doi.org/10.1039/c6dt03548e.
    Sponsors
    This work was supported by the National Natural Science Foundation of China (21390394), the National Basic Research Program of China (2012CB821700 and 2011CB808703), NSFC (21261130584 and 91022030), “111” project (B07016), the Award Project of KAUST (CRG-1-2012-LAI-009) and the Ministry of Education, Science and Technology Development Center Project (20120061130012).
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Dalton Trans.
    DOI
    10.1039/c6dt03548e
    ae974a485f413a2113503eed53cd6c53
    10.1039/c6dt03548e
    Scopus Count
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    Publications Acknowledging KAUST Support

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