Purbia Rahul, Borah Rituraj, Paria Santanu
Interfaces and Nanomaterials Laboratory, Department of Chemical Engineering, National Institute of Technology , Rourkela-769008, India.
Inorg Chem. 2017 Aug 21;56(16):10107-10116. doi: 10.1021/acs.inorgchem.7b01864. Epub 2017 Aug 7.
Development of a high surface area and efficient visible light induced photocatalyst on a large scale is a promising task from the practical perspective. In this study, visible light active C-doped anatase TiO multi-tubes were synthesized using banana (Musa acuminata) stem fiber as a sacrificial template, removed by calcination at 450 °C. During the calcination process, the lattice of anatase TiO phase was doped with C, and obtained multi-tubes showed high surface area (∼99 m/g) with a mesoporous structure made of ∼15 ± 3 nm nanoparticles. The synthesized TiO multi-tubes showed an enhanced light absorption property in the whole visible light region and good thermal stability of the anatase phase up to 750 °C. The synthesized C-doped TiO multi-tubes manifest an excellent photocatalytic activity for the reduction of Cr (VI) to Cr(III) under the visible light exposure. This process may have lots of practical importance as the method of synthesis of the catalyst is novel and the multi-tubes structure can be synthesized on a large scale through a quick and economical way with excellent photocatalytic activity. This novel multi-tubes structure may also be useful for photovoltaics, antimicrobial, and Li-batteries applications in the future.
从实际应用的角度来看，大规模开发具有高表面积且高效的可见光诱导光催化剂是一项很有前景的任务。在本研究中，以香蕉（Musa acuminata）茎纤维为牺牲模板合成了可见光活性的碳掺杂锐钛矿型TiO多管，并在450°C下通过煅烧将其去除。在煅烧过程中，锐钛矿TiO相的晶格被碳掺杂，所得多管具有高表面积（约99 m/g），由约15±3 nm的纳米颗粒构成介孔结构。合成的TiO多管在整个可见光区域表现出增强的光吸收性能，并且锐钛矿相在高达750°C时具有良好的热稳定性。合成的碳掺杂TiO多管在可见光照射下对将Cr（VI）还原为Cr（III）表现出优异的光催化活性。由于该催化剂的合成方法新颖，并且多管结构可以通过快速且经济的方式大规模合成且具有优异的光催化活性，所以这个过程可能具有很多实际意义。这种新颖的多管结构在未来的光伏、抗菌和锂电池应用中可能也会很有用。
