The efficiency of titanate-nanotubes-based photocatalysts towards hydrogen production was studied in the presence of the sacrificial agent, 2-propanol. The highest hydrogen production rate (~120 μmol h⁻¹ g⁻¹) was observed over surface-modified titanate nanotubes by 5-amino salicylic acid decorated with nanometer-sized silver nanoparticles. The X-ray diffraction analysis, transmission electron microscopy, nitrogen adsorption–desorption isotherms, and diffuse reflection spectroscopy were applied to characterize the prepared photocatalytic materials. The better photocatalytic performance of inorganic–organic hybrid materials in comparison to the pristine titanate nanotubes is a consequence of their improved light-harvesting ability due to the formation of interfacial charge transfer (ICT) complex, as well as the presence of metallic silver nanoparticles that suppress the recombination of photo-generated charge carriers. The spin trapping EPR experiments under irradiation of prepared photocatalysts with either UV or visible light were used to monitor the appearance of hydroxyl radicals and superoxide radical anions. The generation of superoxide radical anions under visible light irradiation was detected for hybrid materials, but not for the pristine titanate nanotubes. These results are a consequence of enhanced promotion of electrons to the conduction band due to extended absorption in visible spectral range in hybrids and support the higher efficiency of hydrogen generation observed for surface-modified titanate nanotubes by 5-amino salicylic acid decorated with silver nanoparticles.

在牺牲剂2-丙醇的存在下，研究了基于钛酸酯-纳米管的光催化剂对制氢的效率。最高产氢率（〜120μmolh ^-1 g ^-1在表面修饰的钛酸酯纳米管上，用装饰有纳米级银纳米粒子的5-氨基水杨酸观察到）。利用X射线衍射分析，透射电子显微镜，氮吸附-解吸等温线和漫反射光谱对制备的光催化材料进行了表征。与无机钛杂化纳米管相比，无机-有机杂化材料具有更好的光催化性能，这是由于由于形成了界面电荷转移（ICT）复合物以及金属银纳米颗粒的存在而提高了其光收集能力的结果抑制光生载流子的重组。在制备的光催化剂用紫外线或可见光照射下进行的自旋捕集EPR实验用于监测羟基自由基和超氧自由基阴离子的出现。对于杂化材料，未检测到可见光照射下超氧自由基阴离子的生成，但未检测到原始钛酸酯纳米管。这些结果是由于杂化物在可见光谱范围内的扩展吸收而增强了电子至导带的促进的结果，并支持了用银纳米颗粒修饰的5-氨基水杨酸对表面改性的钛酸酯纳米管观察到的更高的产氢效率。但不适用于原始的钛酸酯纳米管。这些结果是由于杂化物在可见光谱范围内的扩展吸收而增强了电子至导带的促进的结果，并支持了用银纳米颗粒修饰的5-氨基水杨酸对表面改性的钛酸酯纳米管观察到的更高的产氢效率。但不适用于原始的钛酸酯纳米管。这些结果是由于杂化物在可见光谱范围内的扩展吸收而增强了电子至导带的促进的结果，并支持了用银纳米颗粒修饰的5-氨基水杨酸对表面改性的钛酸酯纳米管观察到的更高的产氢效率。