用于高效光电化学水分解的黑色硅掺杂二氧化钛纳米管光阳极。

Dong Zhenbiao, Ding Dongyan, Li Ting, Ning Congqin

Institute of Electronic Materials and Technology, School of Materials Science and Engineering, Shanghai Jiao Tong University Shanghai 200240 China

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 China.

RSC Adv. 2018 Feb 2;8(11):5652-5660. doi: 10.1039/c8ra00021b.

Black Si-doped TiO (Ti-Si-O) nanotubes were fabricated through Zn metal reduction of the Ti-Si-O nanotubes on Ti-Si alloy in an argon atmosphere. The nanotubes were used as a photoanode for photoelectrochemical (PEC) water splitting. Both Si element and Ti/oxygen vacancies were introduced into the black Ti-Si-O nanotubes, which improved optical absorption and facilitated the separation of the photogenerated electron-hole pairs. The photoconversion efficiency could reach 1.22%, which was 7.18 times the efficiency of undoped TiO. It demonstrated that a Si element and Ti/oxygen vacancy co-doping strategy could offer an effective method for fabricating a high-performance TiO-based nanostructure photoanode for improving PEC water splitting.

通过在氩气气氛中用锌金属还原钛硅合金上的钛硅氧纳米管制备了黑色硅掺杂二氧化钛（Ti-Si-O）纳米管。这些纳米管被用作光电化学（PEC）水分解的光阳极。硅元素和钛/氧空位都被引入到黑色Ti-Si-O纳米管中，这提高了光吸收并促进了光生电子-空穴对的分离。光转换效率可达1.22%，是未掺杂二氧化钛效率的7.18倍。这表明硅元素和钛/氧空位共掺杂策略可为制备用于改善PEC水分解的高性能二氧化钛基纳米结构光阳极提供一种有效方法。