期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 38, 页码 11754-11761出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta12332d
关键词
-
资金
- National Natural Science Foundation of China [21003055, 21103054]
- Natural Science Foundation of Fujian Province [2012J01043]
Nitrogen-deficient graphitic carbon nitride (g-C3N4-x) was synthesized by a hydrothermal treatment using ammonium thiosulfate as an oxidant. The as-prepared photocatalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption-desorption, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), elemental analysis (EA), electron paramagnetic resonance (EPR), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and photoluminescence (PL) spectroscopy. The visible-light-driven photocurrent measurement was performed by several on-off cycles of intermittent irradiation. The photocatalytic activity of catalysts was evaluated by splitting water under visible-light irradiation (lambda > 420 nm). Results demonstrated that the photoactivity of g-C3N4-x was enhanced greatly by the deficiency of the terminal amino species on the catalysts. The average H-2 evolution rate on g-C3N4-x was 31.6 mu mol h(-1), which was ca. 3 times higher than that on pristine g-C3N4. It was revealed that the unique nitrogen-deficient structure of g-C3N4-x played an important role in broadened visible-light absorption and efficient electron-hole separation, mainly accounting for the improved photocatalytic activity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据