Fabrication of graphene-modified nano-sized red phosphorus for enhanced photocatalytic performance
Fabrication of graphene-modified nano-sized red phosphorus for enhanced photocatalytic performance
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DOI：
10.1016/j.molcata.2016.07.039
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发表时间：
2016-11
影响因子：
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通讯作者：
Weibing Li;Yaping Zhang;Guodong Tian;Shuya Xie;Qingqing Xu;Lin Wang;Jiming Tian;Yuyu Bu
中科院分区：
文献类型：
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作者：
Weibing Li;Yaping Zhang;Guodong Tian;Shuya Xie;Qingqing Xu;Lin Wang;Jiming Tian;Yuyu Bu
本文采用机械球磨-超声浮选法制备了纳米级赤磷颗粒。将制备的赤磷纳米粒子负载在石墨烯表面。赤磷和石墨烯表面的残余氧化键进行，形成有效的界面接触。结果表明，与大粒径工业赤磷相比，NRP具有更高的比表面积和光催化活性。NRP/石墨烯复合材料对罗丹明（RhB）表现出很大的吸附能力。在可见光下，NRP对RhB的脱色能力是纯NRP的5倍，仅需3min即可完全脱色。因此，NRP/石墨烯复合光催化剂在环境有机污染物净化领域具有巨大的潜力。电化学阻抗谱（EIS）和Mott-Schottky谱结果表明，NRP与石墨烯接触后，导带向下弯曲，电子迅速注入石墨烯。因此，有效地抑制了光生载流子的复合几率，从而提高了复合材料的整体光催化性能。
In this present paper, nano-sized red phosphorus particles (NRP) were prepared through a mechanical milling and ultrasonic flotation method. The as-prepared red phosphorus nano particles were loaded on the surface of graphene. The residual oxidative bonds on the surfaces of the red phosphorus and graphene were carried out to form effective interface contact. The present results indicated that comparing with large size commercial red phosphorus particles, NRP possesses higher specific surface area and photocatalytic activity. The NRP/graphene composite shows a great adsorption capacity for rhodamine (RhB). Meanwhile, its visible-light-driven decolorization performance for RhB was 5 times higher than that of pure NRP, which can decolorize of RhB completely in only 3 min. So, NRP/graphene composite photocatalyst possess great potential in the area of environment organic pollution purge. Electrochemical impedance spectra (EIS) and Mott-Schottky spectra results of these samples indicated that a downward bend of the conduction band of NRP was formed when it contacted with graphene, resulting in a rapid electron injection into the graphene. Therefore, the probability of recombination of photogenerated carriers was inhibited effectively, thus enhanced the overall photocatalytic performance of the composite material.