当前位置: X-MOL 学术Carbon › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effective light scattering and charge separation in nanodiamond@g-C 3 N 4 for enhanced visible-light hydrogen evolution
Carbon ( IF 10.9 ) Pub Date : 2018-11-01 , DOI: 10.1016/j.carbon.2018.06.048
Li-Xia Su , Qun-Zeng Huang , Qing Lou , Zhi-Yu Liu , Jun-Lu Sun , Zong-Tao Zhang , Shi-Rong Qin , Xing Li , Jin-Hao Zang , Lin Dong , Chong-Xin Shan

Abstract Development of heterostructured photocatalysts that promotes charge separation of semiconductor materials is crucial towards efficient photocatalytic hydrogen evolution. Here nanodiamond (ND)@graphitic carbon nitride (g-C3N4) nanosheet heterostructures were synthesized via a facile one-step pyrolysis approach. The ND@g-C3N4 heterostructures exhibit enhanced photocatalytic activity for hydrogen evolution from water splitting as compared with pristine g-C3N4. The optimal heterostructures with 10 wt% ND loading content show the best performance in photocatalytic H2 evolution under visible light irradiation, which is more than 5.6 times higher than that of the pristine g-C3N4. The increased light-trapping induced by the scattering of the NDs promotes more localized charge carriers generation, which is clarified by the combined experimental results and finite difference time domain simulations. Meanwhile, the effective charge separation at the ND@g-C3N4 interface due to the energy level matching can synergistically induce the enhanced photocatalytic activity of g-C3N4.

中文翻译:

纳米金刚石@gC 3 N 4 中的有效光散射和电荷分离可增强可见光析氢

摘要 开发促进半导体材料电荷分离的异质结构光催化剂对于有效的光催化析氢至关重要。在这里,纳米金刚石(ND)@石墨氮化碳(g-C3N4)纳米片异质结构是通过简单的一步热解方法合成的。与原始 g-C3N4 相比,ND@g-C3N4 异质结构对水分解析氢的光催化活性增强。具有 10 wt% ND 负载量的最佳异质结构在可见光照射下显示出最佳的光催化析氢性能,比原始 g-C3N4 高 5.6 倍以上。由 ND 散射引起的光俘获增加促进了更多局部电荷载流子的产生,结合实验结果和有限差分时域模拟可以阐明这一点。同时,由于能级匹配,ND@g-C3N4 界面处的有效电荷分离可以协同诱导 g-C3N4 的光催化活性增强。
更新日期:2018-11-01
down
wechat
bug