1 引言
2 结果与讨论
2.1 材料表征以及结构分析
图1 (a) C60@TpPa-(CH3)2-COF合成示意图. (b) TpPa-(CH3)2-COF的透射电子显微镜图像. (c) C60@TpPa-(CH3)2-COF的透射电子显微镜图像. (d) TpPa-(CH3)2-COF、C60@TpPa-(CH3)2-COF和C60的粉末X-射线衍射图谱对比Figure 1 (a) Schematic illustration for the synthesis of C60@TpPa-(CH3)2-COF. The TEM images of (b) TpPa-(CH3)2-COF and (c) C60@TpPa-(CH3)2- COF. (d) Comparison of powder XRD Patterns for TpPa-(CH3)2-COF, C60@TpPa-(CH3)2-COF and C60 |
图2 (a) TpPa-(CH3)2-COF和C60@TpPa-(CH3)2-COF的吸附-解吸等温线(77 K). (b) TpPa-(CH3)2-COF和C60@TpPa-(CH3)2-COF的孔径分布. (c) TpPa-(CH3)2-COF和C60@TpPa-(CH3)2-COF傅里叶变换红外光谱. (d) TpPa-(CH3)2-COF, C60@TpPa-(CH3)2-COF和C60的拉曼图谱Figure 2 (a) Adsorption-desorption isotherms (77 K) and (b) pore size distributions of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF. (c) Fourier transform infrared spectra of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF. (d) Raman spectra of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF and C60 |
2.2 能级结构分析
图3 (a) TpPa-(CH3)2-COF和C60@TpPa-(CH3)2-COF紫外-可见漫反射光谱对比. (b) TpPa-(CH3)2-COF和(c) C60@TpPa-(CH3)2的莫特-肖特基图谱. (d) TpPa-(CH3)2-COF和C60@TpPa-(CH3)2-COF的价带和导带能级图Figure 3 (a) Comparison of UV-visible diffuse reflection spectra of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF. Mott-Schottky plots of (b) TpPa- (CH3)2-COF and (c) C60@TpPa-(CH3)2-COF. (d) Valence and conduction band energy level diagrams for TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF |
2.3 光电化学测试与内建电场分析
图4 (a) TpPa-(CH3)2-COF与C60@TpPa-(CH3)2-COF的光电流密度对比图. (b) TpPa-(CH3)2-COF与C60@TpPa-(CH3)2-COF的表面光电压(SPV)对比图. (c) TpPa-(CH3)2-COF与C60@TpPa-(CH3)2-COF的内建电场强度对比图. (d) TpPa-(CH3)2-COF与C60@TpPa-(CH3)2-COF的电化学阻抗谱对比图. (e) TpPa-(CH3)2-COF和C60@TpPa-(CH3)2-COF的静电势分布Figure 4 (a) Photocurrent density comparison of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF. (b) Surface photovoltage (SPV) comparison of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF. (c) The internal electric field intensity comparison of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF. (d) Electrochemical impedance spectroscopy comparison of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF. (e) The ESP of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF |
2.4 材料产氢性能
图5 (a) 全光谱光下C60@TpPa-(CH3)2-COF光催化析氢效率. (b) TpPa-(CH3)2-COF和C60@TpPa-(CH3)2-COF产氢能力对比. (c) C60@TpPa-(CH3)2- COF的AQE与SPV叠加曲线. (d) C60@TpPa-(CH3)2-COF产氢循环稳定性Figure 5 (a) The photocatalytic hydrogen evolution of C60@TpPa-(CH3)2-COF with time under full-spectrum light. (b) Comparison of hydrogen-producing capacity of TpPa-(CH3)2-COF and C60@TpPa-(CH3)2-COF. (c) Overlayer curve of AQE and SPV of C60@TpPa-(CH3)2-COF and (d) hydrogen-producing cycle stability of C60@TpPa-(CH3)2-COF |