Wu Zhaochun, Gao Honglin, Yan Shicheng, Zou Zhigang
Eco-Materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, Nanjing 210093, PR China.
Dalton Trans. 2014 Aug 21;43(31):12013-7. doi: 10.1039/c4dt00256c.
The photoactivity of g-C3N4 is greatly limited by its high recombination rate of photogenerated carriers. Coupling g-C3N4 with other materials has been demonstrated to be an effective way to facilitate the separation and transport of charge carriers. Herein we report a composite of conductive carbon black and carbon nitride intercalation compound synthesized through facile one-step molten salt method. The as-prepared carbon black/carbon nitride intercalation compound composite was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), UV-vis absorption spectrum and photoluminescence spectroscopy (PL). The carbon black nanoparticles, homogeneously dispersed on the surface of carbon nitride intercalation compound, efficiently enhanced separation and transport of photogenerated carriers, thus improving the visible-light photocatalytic activity. The composite of 0.5 wt% carbon black and carbon nitride intercalation compound exhibited a H2 production rate of 68.9 μmol h(-1), which is about 3.2 times higher than hydrogen production on pristine carbon nitride intercalation compound.
g-C3N4的光活性受到其光生载流子高复合率的极大限制。将g-C3N4与其他材料耦合已被证明是促进电荷载流子分离和传输的有效方法。在此，我们报道了一种通过简便的一步熔盐法合成的导电炭黑与氮化碳插层化合物的复合材料。通过X射线衍射（XRD）、透射电子显微镜（TEM）、紫外可见吸收光谱和光致发光光谱（PL）对所制备的炭黑/氮化碳插层化合物复合材料进行了表征。均匀分散在氮化碳插层化合物表面的炭黑纳米颗粒有效地增强了光生载流子的分离和传输，从而提高了可见光光催化活性。0.5 wt%炭黑与氮化碳插层化合物的复合材料表现出68.9 μmol h(-1)的产氢速率，这比原始氮化碳插层化合物的产氢速率高出约3.2倍。
