Monolayer Attachment of Metallic MoS2 on Restacked Titania Nanosheets for Efficient Photocatalytic Hydrogen Generation
Monolayer Attachment of Metallic MoS2 on Restacked Titania Nanosheets for Efficient Photocatalytic Hydrogen Generation
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DOI：
10.1021/acsaem.8b01319
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发表时间：
2018-11
影响因子：
6.4
通讯作者：
L. Nurdiwijayanto;Jinghua Wu;Nobuyuki Sakai;R. Ma;Y. Ebina;T. Sasaki
中科院分区：
文献类型：
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作者：
L. Nurdiwijayanto;Jinghua Wu;Nobuyuki Sakai;R. Ma;Y. Ebina;T. Sasaki
单层附着的金属MoS 2（1 T）上重新堆叠的二氧化钛（Ti0.87O20.52-）纳米片，通过一个简单的两步絮凝过程中，他们的胶体悬浮液的援助，在临界H+浓度的差异所需的诱导各自的纳米片絮凝。该过程产生了多孔的Ti0.87O20.52-纳米片复盖单层二硫化钼，作为电子收集器，并提供了丰富的质子还原反应的催化活性位点的重新堆叠的聚集体。MoS 2改性的再堆叠的Ti0.87O20.52-纳米片显示出显着高的光催化效率为氢气的产生（1.2 mmol h-1 g-1），是上级的那些再堆叠的Ti0.87O20.52-纳米片和P25-TiO 2纳米粒子常规改性的MoS 2（0.38，和0.4 mmol h-1 g-1，分别）。Ti0.87O20.52-/MoS 2纳米片广泛的分子级界面耦合有利于有效的电荷分离和快速的电子转移，导致了Ti0.87O20.52-/MoS 2纳米片的高性能。
Monolayer attachment of metallic MoS2 (1T) on restacked titania (Ti0.87O20.52–) nanosheets was attained via a facile two-step flocculation process of their colloidal suspensions with the aid of the difference in critical H+ concentrations required for inducing flocculation of the respective nanosheets. The process produced porous flaky aggregates of restacked Ti0.87O20.52– nanosheets covered with monolayer MoS2, which serves as the electron collector and provides abundant catalytically active sites for proton reduction reaction. The MoS2-modified restacked Ti0.87O20.52– nanosheets showed a remarkably high photocatalytic efficiency for hydrogen generation (1.2 mmol h–1 g–1), being superior to those of the restacked Ti0.87O20.52– nanosheets and P25-TiO2 nanoparticles conventionally modified with MoS2 (0.38, and 0.4 mmol h–1 g–1, respectively). The extensive molecular-level interfacial coupling of Ti0.87O20.52–/MoS2 nanosheets facilitates efficient charge separation and fast electron transfer, resulting in t...