Photocatalytic hydrogen production enhancement of Z-Scheme CdS quantum dots/Ni2P/Black Ti3+-TiO2 nanotubes with dual-functional Ni2P nanosheets
Photocatalytic hydrogen production enhancement of Z-Scheme CdS quantum dots/Ni2P/Black Ti3+-TiO2 nanotubes with dual-functional Ni2P nanosheets
复制标题
具有双功能 Ni2P 纳米片的 Z 型 CdS 量子点/Ni2P/Black Ti3 -TiO2 纳米管的光催化产氢增强
DOI：
10.1016/j.ijhydene.2020.09.084
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发表时间：
2020
影响因子：
7.2
通讯作者：
Li Chaorong
中科院分区：
文献类型：
--
作者：
Pan Jiaqi;Ou Wei;Li Shi;Chen Yipu;Li Hongli;Liu Yanyan;Wang Jingjing;Song Changsheng;Zheng Yingying;Li Chaorong
采用连续电纺-退火/还原-化学沉积的方法制备了具有双功能Ni2P纳米片的Z方案CdS量子点/Ni2P/黑色Ti3+-TiO2纳米管，其中TiO2纳米管是通过电纺法制备的，然后在纳米管表面生长出二维Ni2P片层，然后通过还原引入Ti3+/Ovions，然后在Ni2P片层表面沉积CDS量子点。通过光催化制氢性能评价，Z-SCHEMPLE-CDS量子点/Ni2P/B-TiO2光催化性能(~3303.85μ/gh)比未改性TiO2光催化性能提高了约70倍。其主要原因是二维Ni2P和Ti3+离子的类铂行为加速了光生电子向水中的扩散，降低了H_2的活化势垒，Z-方案异质结加速了光生载流子的分离和转移，Ovions和空心纳米管提高了太阳能的利用率，这一结果得到了电化学测试的支持。
The Z-Scheme CdS quantum dots/Ni2P/Black Ti3+–TiO2nanotubes with dual-functional Ni2P nanosheets are fabricated by a continuously electrospinning-annealing/reduction-chemical deposition method, there, the TiO2nanotubes are fabricated via electrospinning, subsequently, the 2D Ni2P lamellas grow on the surface of nanotubes and the Ti3+/Ovions are introduced by reduction, then CdS QDs are deposited on the surface of Ni2P lamellas. Evaluated by the photocatalytic hydrogen production, the photocatalytic performance of Z-Scheme CdS QDs/Ni2P/B–TiO2(~3303.85 μmol/g h) exhibits an obvious enhancement of about ~70 folds than unmodified TiO2. The main reasons for the HER enhancement are ascribed to that the Pt-like behavior 2D Ni2P and Ti3+ions can accelerate the photo-generated electrons diffusing into water and reduce H2activation barrier, the Z-Scheme heterojunction can accelerate the separating and transferring of photo-generated charge carriers, the Ovions and hollow nanotubes can increase solar utilization, which can be supported by the electrochemical measurements.