TY - JOUR
T1 - A comparative study on photocatalytic hydrogen evolution activity of synthesis methods of CDs/ZnIn2S4 photocatalysts
AU - Lei, Kai
AU - Kou, Mingpu
AU - Ma, Zhaoyu
AU - Deng, Yu
AU - Ye, Liqun
AU - Kong, Yan
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/8/5
Y1 - 2019/8/5
N2 - The introduction of carbon materials in photocatalytic systems can significantly enhance the photocatalytic hydrogen evolution activity. Here, we proposed and fabricated carbon nanodots/Znln2S4 (CDs/ZIS)samples via three methods. The morphology, chemical elements and valence, and photoelectric properties of CDs/ZIS samples were systematically characterized by SEM, TEM, XPS, UV and PL. The photocatalytic H2 production experiments indicate that the photocatalytic performance of all CDs/ZIS samples has been significantly improved, which could be attributed to the fact that serving as an excellent electron acceptor, CDs can accelerate the separation efficiency of photogenerated electrons and holes. The samples prepared via one-pot hydrothermal method exhibit the optimal photocatalytic activity and the corresponding H2 production rate of 4.15 mmol g−1.h−1 under visible light irradiation (λ>420 nm), which is about 2.92 times higher than pure ZIS. Our work presented the influence of synthetic method on photoelectric performance and photocatalytic activity of CDs/ZIS nanocomposites, and provided a reliable idea for improving the photocatalytic performance of photocatalyst toward practical applications.
AB - The introduction of carbon materials in photocatalytic systems can significantly enhance the photocatalytic hydrogen evolution activity. Here, we proposed and fabricated carbon nanodots/Znln2S4 (CDs/ZIS)samples via three methods. The morphology, chemical elements and valence, and photoelectric properties of CDs/ZIS samples were systematically characterized by SEM, TEM, XPS, UV and PL. The photocatalytic H2 production experiments indicate that the photocatalytic performance of all CDs/ZIS samples has been significantly improved, which could be attributed to the fact that serving as an excellent electron acceptor, CDs can accelerate the separation efficiency of photogenerated electrons and holes. The samples prepared via one-pot hydrothermal method exhibit the optimal photocatalytic activity and the corresponding H2 production rate of 4.15 mmol g−1.h−1 under visible light irradiation (λ>420 nm), which is about 2.92 times higher than pure ZIS. Our work presented the influence of synthetic method on photoelectric performance and photocatalytic activity of CDs/ZIS nanocomposites, and provided a reliable idea for improving the photocatalytic performance of photocatalyst toward practical applications.
KW - Carbon dots
KW - Photocatalytic hydrogen evolution
KW - Synthesis methods
KW - ZnlnS
UR - http://www.scopus.com/inward/record.url?scp=85065491848&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2019.04.073
DO - 10.1016/j.colsurfa.2019.04.073
M3 - 文章
AN - SCOPUS:85065491848
SN - 0927-7757
VL - 574
SP - 105
EP - 114
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
ER -