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Dendritic TiO 2 /ln 2 S 3 /AgInS 2 Trilaminar Core–Shell Branched Nanoarrays and the Enhanced Activity for Photoelectrochemical Water Splitting
Author(s) -
Liu Zhifeng,
Guo Keying,
Han Jianhua,
Li Yajun,
Cui Ting,
Wang Bo,
Ya Jing,
Zhou Cailou
Publication year - 2014
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201400622
Subject(s) - photocurrent , nanorod , water splitting , materials science , photocatalysis , nanotechnology , hydrothermal circulation , adsorption , ionic bonding , chemical engineering , nanostructure , optoelectronics , chemistry , ion , catalysis , organic chemistry , engineering
Hierarchical TiO 2 /ln 2 S 3 /AgInS 2 trilaminar core–shell branched nanorod arrays (T‐CS BNRs) have been fabricated directly on conducting glass substrates (FTO) via a facile, versatile and low‐cost hydrothermal and successive ionic layer adsorption and reaction (SILAR) for photoelectrochemical (PEC) water splitting. On the basis of optimal thickness of AgInS 2 shell, such TiO 2 /ln 2 S 3 /AgInS 2 T‐CS BNRs exhibit a higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 22.13 mA·cm −2 and 14.83%, which is, to the best of our knowledge, the highest value ever reported for similar nanostructures. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via (i) increasing the photon absorption through the lager specific surface area of TiO 2 BNRs and a sensitizer layer (AgInS 2 ), (ii) a buffer layer (ln 2 S 3 ), (iii) a better energy level alignment.