Thème COG — Systèmes cognitifs
Thème COG — Systèmes cognitifs
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DOI：
10.1016/j.ijhydene.2022.07.054
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发表时间：
2006
影响因子：
7.2
通讯作者：
中科院分区：
文献类型：
--
作者：
太阳能光驱动水分解作为解决能源危机的重要技术越来越受到人们的关注。为了抑制载流子的复合率并提高TiO2的表面活性，通过静电纺丝和一锅水热路线制备了Cd/Co摩尔比为1:1的双CdS-CoS与S,N共掺杂TiO2（Cd0.5Co0.5S/SN-TiO2）纳米纤维。 Cd0.5Co0.5S/SN-TiO2纳米纤维的析氢速率高于TiO2、CoS/SN-TiO2和CdS/SN-TiO2纳米纤维。最佳的 3-Cd0.5Co0.5S/SN-TiO2（Cd0.5Co0.5S 比例为 5.0 wt%）表现出最高的光催化活性（4.55 mmol g−1h−1），并且在五个循环后具有最佳的光催化耐久性。这是由于 CdS 和 CoS 的混合效应在 Cd0.5Co0.5S 纳米粒子和 S,N 共掺杂 TiO2 纳米纤维之间的交界处实现了电荷载流子的有效转移和分离。同时，TiO2基异质结扩展的可见光响应和足够的活性位点有利于水分解。
Solar-light driven water splitting acted as an important technology to solve the energy crisis has attracted much more attention. To restrain the recombination rate of charge carriers and enhance the surface activity of TiO2, integrating dual CdS–CoS with S,N-codoped TiO2with a Cd/Co mole ratio of 1:1 (Cd0.5Co0.5S/SN-TiO2) nano-fibers were fabricated via the electro-spinning and one-pot hydrothermal routes. H2-evolution rate of Cd0.5Co0.5S/SN-TiO2nano-fibers was higher than TiO2, CoS/SN-TiO2and CdS/SN-TiO2nano-fibers. The optimal 3-Cd0.5Co0.5S/SN-TiO2with a Cd0.5Co0.5S ratio of 5.0 wt% performed the highest photocatalytic activity (4.55 mmol g−1h−1), and the best photocatalytic durability after five cycles. It's owing to the hybrid effect of CdS and CoS for efficient transfer and separation of charge carriers at the junction interface between Cd0.5Co0.5S nanoparticles and S,N-codoped TiO2nanofibers. Meanwhile, the extending visible-light response and sufficient active sites of TiO2-based heterojunctions are favorable for the water splitting.