College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, People's Republic of China.
Nanotechnology. 2018 Oct 26;29(43):435706. doi: 10.1088/1361-6528/aada28. Epub 2018 Aug 14.
For improving the photocathodic protection performance of TiO photoanode, ZnInS/reduced graphene oxide (RGO)/TiO nanotubes (NTs) composite was synthesized by electrochemical anodizing combined with hydrothermal method. The photoelectrochemical and photocathodic protection properties of the ZnInS/RGO/TiO composite were investigated in detail. Compared with pure TiO NTs, the ZnInS/RGO/TiO composite showed a significant improvement in photocathodic protection performances. The photogenerated open circuit potential drop of ZnInS/RGO/TiO coupled with Q235 carbon steel in 3.5 wt% NaCl solution under visible light could reach 420 mV versus saturated calomel electrode, which was more than twice as much as that of pure TiO. The photogenerated current density of ZnInS/RGO/TiO could reach 5.6 mA cm, which was twice as much as that of pure TiO. The appearance of the adsorbed oxygen (O) enabled the ZnInS/RGO/TiO to have better photo-carrier separation efficiency and better photogenerated cathodic protection than pure TiO. The present work demonstrated ZnInS/RGO/TiO could be a potential material for photoanodes because of its better visible-light response, higher electrical conductivity and smaller charge transfer resistance.
为了提高 TiO 光阳极的光电阴极保护性能，通过电化学阳极氧化结合水热法合成了 ZnInS/还原氧化石墨烯（RGO）/TiO 纳米管（NTs）复合材料。详细研究了 ZnInS/RGO/TiO 复合材料的光电化学和光电阴极保护性能。与纯 TiO NTs 相比，ZnInS/RGO/TiO 复合材料在光电阴极保护性能方面有了显著的提高。在可见光下，ZnInS/RGO/TiO 与 Q235 碳钢在 3.5wt%NaCl 溶液中耦合时的光生开路电位降可达 420mV 相对于饱和甘汞电极，是纯 TiO 的两倍多。ZnInS/RGO/TiO 的光生电流密度可达 5.6mAcm，是纯 TiO 的两倍。吸附氧（O）的出现使 ZnInS/RGO/TiO 具有比纯 TiO 更好的光载流子分离效率和更好的光生阴极保护性能。本工作表明，由于其更好的可见光响应、更高的电导率和更小的电荷转移电阻，ZnInS/RGO/TiO 可能是一种潜在的光阳极材料。
