TY - JOUR
T1 - Substantial Enhancement toward the Photocatalytic Activity of CdS Quantum Dots by Photonic Crystal-Supporting Films
AU - Zhang, Ruifang
AU - Zeng, Fang
AU - Pang, Fei
AU - Ge, Jianping
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/12/12
Y1 - 2018/12/12
N2 - The introduction of photonic crystals (PC) to semiconductors, which usually appear in the form of inverse opal materials, has been proved to be an effective way to enhance the photocatalytic activity, but their enhancement factor is merely two- to fourfold in most previous reports. In this work, a supported thin-film photocatalyst (CdS/SiO 2 -ETPTA), as a new PC-based catalyst system, is prepared for hydrogen evolution under visible light, which presents an 6.4- to 8.8-fold activity compared to the same CdS quantum dots deposited on a non-PC film. This substantial enhancement originates from the high reflectivity of PCs and absorption of reflected light by CdS, whose absorption edge exactly matches the stopband of PCs. Compared to the traditional inverse opal photocatalysts, the PC-supported photocatalyst possesses many advantages including simplified procedures in synthesis, a substantial enhancement of activity, flexible modification with mature thin-film techniques, good stability, and easy regeneration in reaction.
AB - The introduction of photonic crystals (PC) to semiconductors, which usually appear in the form of inverse opal materials, has been proved to be an effective way to enhance the photocatalytic activity, but their enhancement factor is merely two- to fourfold in most previous reports. In this work, a supported thin-film photocatalyst (CdS/SiO 2 -ETPTA), as a new PC-based catalyst system, is prepared for hydrogen evolution under visible light, which presents an 6.4- to 8.8-fold activity compared to the same CdS quantum dots deposited on a non-PC film. This substantial enhancement originates from the high reflectivity of PCs and absorption of reflected light by CdS, whose absorption edge exactly matches the stopband of PCs. Compared to the traditional inverse opal photocatalysts, the PC-supported photocatalyst possesses many advantages including simplified procedures in synthesis, a substantial enhancement of activity, flexible modification with mature thin-film techniques, good stability, and easy regeneration in reaction.
KW - CdS
KW - hydrogen evolution
KW - photocatalyst
KW - photonic crystal
KW - quantum dots
UR - https://www.scopus.com/pages/publications/85058088005
U2 - 10.1021/acsami.8b14437
DO - 10.1021/acsami.8b14437
M3 - 文章
C2 - 30450893
AN - SCOPUS:85058088005
SN - 1944-8244
VL - 10
SP - 42241
EP - 42248
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 49
ER -