Graphene supported βNaYF_4:Yb~(3+),Tm~(3+) and N doped P25 nanocomposite as an advanced NIR and sunlight driven upconversion photocatalyst

Wei Wang; Wenjuan Huang; Yaru Ni; Chunhua Lu; Lijuan Tan; Zhongzi Xu

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Graphene supported βNaYF_4:Yb~(3+),Tm~(3+) and N doped P25 nanocomposite as an advanced NIR and sunlight driven upconversion photocatalyst

机译：石墨烯负载的βNaYF_4：Yb〜（3 +），Tm〜（3+）和N掺杂的P25纳米复合材料作为先进的近红外和阳光驱动的上转换光催化剂

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A new photocatalytic nanocomposite consisting of upconversion material (β-NaYF_4:Yb~(3+),Tm~(3+)), N doped P25 (P(N)), and graphene (GP) has been fabricated successfully and shown to be an advanced photocatalyst under the near infrared (NIR) and sunlight irradiation. During the preparation process, β-NaYF_4:Yb~(3+),Tm~(3+) and P(N) were simultaneously loaded on GP and they were closely attach to each other. The light absorption range of P(N) matches well with the converted light emission peaks of β-NaYF_4:Yb~(3+),Tm~(3+), resulting in P(N) can absorb the converted light sufficiently for photocatalysis. The introduced GP not only act as the support material, but also enhances the light absorption and photogen-erated electron-hole pairs' separation. Photocatalytic activity measurements of the new photocatalyst under the NIR and simulated sunlight irradiation was improved compared with those of pure and GP supported P(N). The upconversion efficiency related photocatalytic activity confirms the significant role of upconversion materials. Overall, this investigation may provide new insights in preparing new photo-catalysts by coupling with optical function materials to make sufficient use of sunlight for practical applications.

机译：由上转换材料（β-NaYF_4：Yb〜（3 +），Tm〜（3 +）），N掺杂的P25（P（N））和石墨烯（GP）组成的新型光催化纳米复合材料已成功制备并显示出在近红外（NIR）和日光照射下成为高级光催化剂。在制备过程中，将β-NaYF_4：Yb〜（3 +），Tm〜（3+）和P（N）同时加载到GP上并紧密结合。 P（N）的光吸收范围与β-NaYF_4：Yb〜（3 +），Tm〜（3+）的转换发光峰匹配良好，从而P（N）可以充分吸收转换后的光用于光催化。引入的GP不仅充当支撑材料，而且还增强了光吸收和光生电子空穴对的分离。与纯净和GP负载的P（N）相比，改进了在NIR和模拟阳光照射下对新光催化剂的光催化活性测量。上转换效率相关的光催化活性证实了上转换材料的重要作用。总体而言，这项研究可通过与光学功能材料结合使用以充分利用日光在实际应用中的应用，为制备新的光催化剂提供新的见解。

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来源
《Applied Surface Science》 |2013年第1期|832-837|共6页
作者
Wei Wang; Wenjuan Huang; Yaru Ni; Chunhua Lu; Lijuan Tan; Zhongzi Xu;
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作者单位

State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, PR China;

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正文语种 eng
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关键词
Titanium dioxide; Upconversion; Photocatalysis; Doping; Graphene;

机译：二氧化钛;上转换;光催化;掺杂石墨烯;

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Graphene supported βNaYF_4:Yb~(3+),Tm~(3+) and N doped P25 nanocomposite as an advanced NIR and sunlight driven upconversion photocatalyst

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