在半晶态石墨相氮化碳上增强可见光光催化固氮：氧和硫共掺杂对晶体和电子结构的调节。
Enhanced visible-light photocatalytic nitrogen fixation over semicrystalline graphitic carbon nitride: Oxygen and sulfur co-doping for crystal and electronic structure modulation.
机构信息
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
出版信息
J Colloid Interface Sci. 2018 Jan 1;509:298-306. doi: 10.1016/j.jcis.2017.09.026. Epub 2017 Sep 8.
Oxygen and sulfur co-doped semicrystalline graphitic carbon nitride (HGCNOS) was synthesized by a one-pot hydrothermal method and applied in visible-light photocatalytic nitrogen fixation. Remarkably, HGCNOS exhibited a higher photocatalytic activity than pristine graphitic carbon nitride (GCN). Oxygen doping caused semicrystalline structure, making exciton dissociated at the order-disorder interfaces of HGCNOS and releasing more electrons and holes. Furthermore, the conduction band position of HGCNOS was elevated by sulfur doping, promoting the reduction ability of HGCNOS. Thus, the special electronic and physicochemical structure of HGCNOS contributed to the enhanced photocatalytic activity, facilitating its application on nitrogen photofixation.
氧硫共掺杂半晶态石墨相氮化碳（HGCNOS）通过一步水热法合成，并应用于可见光光催化固氮。值得注意的是，HGCNOS 表现出比原始石墨相氮化碳（GCN）更高的光催化活性。氧掺杂导致半晶态结构，使激子在 HGCNOS 的有序-无序界面上解离，并释放更多的电子和空穴。此外，硫掺杂使 HGCNOS 的导带位置升高，提高了 HGCNOS 的还原能力。因此，HGCNOS 的特殊电子和物理化学结构有助于提高光催化活性，促进其在氮气光固定中的应用。
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