Highly efficient photocatalysts of Pt/BN/CdS constructed by using the Pt as the electron acceptor and the BN as the holes transfer for H2-production
Highly efficient photocatalysts of Pt/BN/CdS constructed by using the Pt as the electron acceptor and the BN as the holes transfer for H2-production
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DOI：
10.1016/j.jallcom.2015.03.047
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发表时间：
2015-07
影响因子：
6.2
通讯作者：
Ruizhen Zhang;Jian Wang;P. Han
中科院分区：
文献类型：
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作者：
Ruizhen Zhang;Jian Wang;P. Han
采用球磨法制备了高活性BN/CdS复合光催化剂。采用X射线粉末衍射（XRD）、透射电子显微镜（TEM）、紫外-可见吸收光谱（UV-vis）和荧光发射光谱（PL）对所制备的BN/CdS复合材料进行了表征。研究了BN负载量和球磨时间对析氢速率的影响。结果表明，CdS与h-BN之间可以实现紧密接触，与适量的h-BN复合后，CdS的光催化活性得到显著提高。结果表明，h-BN的最佳负载量为5wt%，球磨时间为1h。在Pt/CdS/BN光催化体系中，Pt作为电子受体和BN作为空穴传输体都能提高CdS的活性。在Pt/BN/CdS光催化剂上的最高H2-释放速率可以高达17.563 mmol g-1h-1。
High active BN/CdS composite photocatalysts were prepared by the ball milling method. The prepared BN/CdS composites were characterized by the X-ray powder diffraction (XRD), transmission electron microscopy (TEM), UV–vis absorption spectra (UV–vis) and fluorescence emission spectra (PL). The effects of the loading amounts of BN and the ball milling time on the H2-evolution rate were investigated. The results indicated that the tight contact of CdS with h-BN can be achieved, and the photocatalytic activity of CdS could be improved substantially by coupling with a proper amount of milled h-BN. The optimal loading amount of h-BN was found to be 5 wt% and the milling time was 1 h. In the Pt/CdS/BN photocatalytic system, both the Pt as the electron acceptor and the BN as the hole transfer may cause the improvement of the CdS activity. The highest H2-evolution rate over the Pt/BN/CdS photocatalyst can reach as high as ∼17.563 mmol g−1h−1.