Application of Rh/TiO2 Nanotube Array in Photocatalytic Hydrogen Production from Formic Acid Solution
Application of Rh/TiO2 Nanotube Array in Photocatalytic Hydrogen Production from Formic Acid Solution
复制标题
DOI：
10.3390/jcs6110327
复制
发表时间：
2022-11
影响因子：
3.3
通讯作者：
M. H. Suhag;Ikki Tateishi;M. Furukawa;H. Katsumata;Aklima Khatun;S. Kaneco
中科院分区：
文献类型：
--
作者：
M. H. Suhag;Ikki Tateishi;M. Furukawa;H. Katsumata;Aklima Khatun;S. Kaneco
采用电化学阳极氧化法制备了二氧化钛纳米管。研究了用同时沉积Rh的TNT光催化甲酸溶液制氢。研究了煅烧温度和煅烧时间对纳米碳管产氢性能的影响。当使用具有500 °C煅烧温度和10小时煅烧时间的TNT在5小时黑光（352 nm）照射下时，观察到最大氢气产生（54 μmol）。可重复使用性测试表明，具有光沉积Rh金属的TNT（Rh/TNT）在甲酸溶液制氢的第五个循环中具有优异的稳定性。通过X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、光致发光（PL）和漫反射光谱（DRS）对Rh金属光沉积前后的TNT进行了表征。XRD显示在500 °C和300 °C煅烧温度下TNT中存在最佳锐钛矿-金红石相比率。XRD和SEM揭示了在300 °C和500 °C煅烧温度下Rh金属在TNT表面上的沉积。观察到在500 °C下煅烧的TNT的光吸收能力大于在300 °C下煅烧的TNT的光吸收能力。提出了形成TNT的反应机理和同时沉积Rh的TNT光催化甲酸溶液制氢的反应机理。
Titanium dioxide nanotubes (TNTs) were fabricated via electrochemical anodization process. Photocatalytic hydrogen generation from formic acid solution was investigated using TNTs with simultaneous Rh deposition. The effects of calcination temperature and time for TNTs on hydrogen generation were studied. The maximum hydrogen generation (54 µmol) was observed when using TNTs with a 500 °C calcination temperature and 10 h calcination time under 5 h of black light (352 nm) irradiation. The reusability tests indicated that the TNTs with photodeposited Rh metal (Rh/TNT) had excellent stability up to the fifth cycle for hydrogen generation from formic acid solution. The TNTs were characterized before and after photodeposition of Rh metal via X-ray powder diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), and diffuse reflectance spectroscopy (DRS). XRD revealed the presence of optimal anatase–rutile phase ratios in TNTs at 500 °C and 300 °C calcination temperatures. XRD and SEM revealed the deposition of Rh metal on the TNT surface at 300 °C and 500 °C calcination temperatures. It was observed that the light absorption ability of TNTs calcined at 500 °C was greater than that of TNTs calcined at 300 °C. The reaction mechanisms for the formation of TNTs and photocatalytic hydrogen production from formic acid solutions by TNTs with simultaneous Rh deposition were also proposed.