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Ag 2 S/CdS‐Heterostructured Nanorod Synthesis by L–Cysteine‐Mediated Reverse Microemulsion Method
Author(s) -
Liu Jing,
Shan Dongyu,
Zhang Tingting,
Li Yunhe,
Wang Ran,
Liu Meiying
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902171
Subject(s) - nanorod , photocatalysis , microemulsion , materials science , high resolution transmission electron microscopy , photoluminescence , x ray photoelectron spectroscopy , visible spectrum , chemical engineering , absorption spectroscopy , photochemistry , nanotechnology , absorption (acoustics) , cyclohexane , catalysis , chemistry , organic chemistry , pulmonary surfactant , optoelectronics , transmission electron microscopy , optics , physics , engineering , composite material
Highly‐efficient charge separation is of significant importance for the improvement of photocatalytic performance towards solar H 2 production. Here, Ag 2 S/CdS hetero nanorods with intimate contact were fabricated at ambient temperature by L‐cysteine‐assisted method involving a Triton X‐100/cyclohexane/hexanol/water quaternary W/O reverse microemulsion process. The formation of Ag 2 S/CdS nanojunction is verified by XRD, TEM, HRTEM, EDS as well as XPS technique, while the photocatalytic activity of Ag 2 S/CdS hetero nanorod is assessed by water photo‐reduction to H 2 in the presence of S 2− /SO 3 2− as sacrificial agents under visible‐light irradiation. It is demonstrated that Ag 2 S/CdS hetero nanorod exhibits an about 480‐fold enhancement in the H 2 ‐evolution rate relative to that of pristine CdS. In combination with UV‐vis absorption and photoluminescence spectra, the synergistic effects stemmed from the extended light‐absorption and facilitated charge‐separation between the interfaces largely contribute to boosting the photocatalytic H 2 ‐evolution activity of CdS nanorod. This work offers a novel strategy to in‐situ construct CdS‐based heterostructured photocatalysts with good performance and low cost.