Journal
NANOTECHNOLOGY
Volume 30, Issue 12, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6528/aafcee
Keywords
mesoporous TiO2 nanotube; NiS cocatalyst; Ti3+ self-doping; oxygen vacancy defect; photocatalysis
Funding
- National Natural Science Foundation of China [21871078, 51672073]
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2015014]
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NiS nanoparticles modified black TiO2 hollow nanotubes (NBTNs) are successfully synthesized via surface hydrogenation and the facile solvothermal method. The unique structure with intensified surface and interface characteristics endow NBTNs with more catalytic sites, and increase charge carrier separation efficiency with an extended charge lifetime, overwhelmingly promoting its photocatalytic performance. The resultant NBTNs possess a relatively high surface area and pore size of similar to 89 m(2) g(-1) and similar to 9.8 nm, respectively. The resultant NBTNs exhibit an excellent solar-driven photocatalytic hydrogen rate (3.17 mmolh(-1) g(-1)), which is almost as high as that of Pt as cocatalyst, in which the apparent quantum yield of 5.4% (420 nm) is recorded for the NBTNs sample. Moreover, the turnover number can be up to 116 000 within 48 h and the turnover frequency is 2400 for NiS. This novel strategy could provide a better understanding of cocatalyst photocatalytic mechanisms, and a scheme simultaneously regulating the morphology and structure of photocatalysts for promoting H-2 generation.
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