The Institute of Scientific and Industrial Research (SANKEN), Osaka University , Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan.
Department of Physics, Beihang University , Beijing 100191, People's Republic of China.
J Am Chem Soc. 2017 Sep 20;139(37):13234-13242. doi: 10.1021/jacs.7b08416. Epub 2017 Sep 8.
In the drive toward green and sustainable chemistry, exploring efficient and stable metal-free photocatalysts with broadband solar absorption from the UV to near-infrared region for the photoreduction of water to H remains a big challenge. To this end, a binary nanohybrid (BP/CN) of two-dimensional (2D) black phosphorus (BP) and graphitic carbon nitride (CN) was designed and used as a metal-free photocatalyst for the first time. During irradiation of BP/CN in water with >420 and >780 nm light, solid H gas was generated, respectively. Owing to the interfacial interaction between BP and CN, efficient charge transfer occurred, thereby enhancing the photocatalytic performance. The efficient charge-trapping and transfer processes were thoroughly investigated with time-resolved diffuse reflectance spectroscopic measurement. The present results show that BP/CN is a metal-free photocatalyst for artificial photosynthesis and renewable energy conversion.
在追求绿色和可持续化学的过程中，探索高效稳定的无金属光催化剂，使其具有从紫外线到近红外区域的宽带太阳能吸收，用于光还原水制氢，仍然是一个巨大的挑战。为此，首次设计并使用了二维（2D）黑磷（BP）和石墨相氮化碳（CN）的二元纳米杂化（BP/CN）作为无金属光催化剂。在 >420 和 >780nm 光照射下，BP/CN 在水中分别产生固体 H 气体。由于 BP 和 CN 之间的界面相互作用，发生了有效的电荷转移，从而提高了光催化性能。通过时间分辨漫反射光谱测量对有效的电荷俘获和转移过程进行了深入研究。目前的结果表明，BP/CN 是一种用于人工光合作用和可再生能源转换的无金属光催化剂。
