Shi Yuxing, Chen Zhouze, Hao Pengyu, Shan Pengnian, Lu Jialin, Guo Feng, Shi Weilong
School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, PR China.
School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, PR China.
J Colloid Interface Sci. 2024 Jan;653(Pt B):1339-1347. doi: 10.1016/j.jcis.2023.09.170. Epub 2023 Sep 29.
Photothermal-assisted photocatalytic hydrogen production is a very promising way to maximize solar energy utilization to obtain clean energy. Herein, we designed a composite photocatalyst with coating core-shell FeO@SiO nanoparticles on the surface of ZnInS micro-flowers for high-efficient photothermal-assisted photocatalytic water/seawater splitting. Experimental results reveal that in the core-shell structure of FeO@SiO, the addition of the SiO shell in FeO@SiO not only separates the photothermal and photochemical components, avoiding competition between them, but also further increases the temperature of the core in a manner similar to the greenhouse effect, which was used as a hot core to provide heat to the ZnInS photocatalyst to increase the surface reaction temperature and enhance the collision chances of photo-generated carriers into causing severe recombination of carriers, thus promoting the hydrogen generation. Significantly, the optimal photocatalytic water/seawater splitting into hydrogen production rates over FeO@SiO/ZnInS are up to 1258.5 and 1108.5 μmol g h, which are 11.9 and 14.7 times higher than that of pristine ZnInS, respectively. This study provides an idea for the design of highly efficient photothermal-assisted photocatalysts.
光热辅助光催化制氢是一种极具潜力的最大化太阳能利用以获取清洁能源的方法。在此，我们设计了一种复合光催化剂，通过在ZnInS微花表面包覆核壳结构的FeO@SiO纳米颗粒来实现高效的光热辅助光催化水/海水分解。实验结果表明，在FeO@SiO的核壳结构中，SiO壳层的加入不仅分离了光热和光化学组分，避免了它们之间的竞争，还以类似于温室效应的方式进一步提高了核的温度，该核作为热核为ZnInS光催化剂提供热量，以提高表面反应温度并增加光生载流子的碰撞几率，从而减少载流子的严重复合，进而促进产氢。值得注意的是，FeO@SiO/ZnInS光催化水/海水分解制氢的最佳产氢速率分别高达1258.5和1108.5 μmol g⁻¹ h⁻¹，分别是原始ZnInS的11.9倍和14.7倍。本研究为高效光热辅助光催化剂的设计提供了思路。
