TY - JOUR
T1 - Facile synthesis of monodispersed yolk-shelled molybdenum disulfide microspheres with enhanced photocatalytic properties
AU - Zhang, Yongxing
AU - Zhao, Yuanyuan
AU - Li, Jia
AU - Li, Li
AU - Liu, Yi
AU - Ma, Dong
AU - Li, Dechuan
AU - Li, Xuanhua
N1 - Publisher Copyright:
© the Partner Organisations.
PY - 2018/12
Y1 - 2018/12
N2 - The controllable preparation and development of a practical photocatalytic material with yolk-shelled structure remains a great challenge. Herein, monodispersed yolk-shelled molybdenum disulfide microspheres have been synthesized via a facile and economical hydrothermal method with the assistance of a surfactant (polyethylene-polypropylene glycol (P123)). Ostwald ripening is the main formation mechanism for the yolk-shelled structure. The photocatalytic activity of the sample is evaluated by monitoring the photodegradation of rhodamine B (RhB) under white light illumination (500 W xenon lamp) with the assistance of hydrogen peroxide (H2O2). The results indicate that the yolk-shelled microspheres display excellent photocatalytic activity and recycling stability. The photocatalytic degradation rate of yolk-shelled MoS2 microspheres is 97.6% after only 30 min, which is much higher than those of MoS2 particles synthesized without P123, MoS2 solid microspheres and commercial MoS2 (Experimental section) (54.7%, 4.6% and 9.6% at 30 min, respectively). The reaction rate constant (k) of the yolk-shelled microspheres for the photodegradation of RhB is 1.19 × 10-1 min-1, which is 1.58, 92.97 and 107.21 times faster than those of MoS2 particles (k2 = 7.51 × 10-2), MoS2 solid microspheres (k3 = 1.28 × 10-3) and commercial MoS2 (k4 = 1.11 × 10-3), respectively. Such a highly desired yolk-shelled structure enables higher multiple light reflections and scattering between the outer spherical shell and the interior core compared with MoS2 particles, MoS2 solid microspheres and commercial MoS2 to provide a more efficient way of enhancing light-harvesting efficiency.
AB - The controllable preparation and development of a practical photocatalytic material with yolk-shelled structure remains a great challenge. Herein, monodispersed yolk-shelled molybdenum disulfide microspheres have been synthesized via a facile and economical hydrothermal method with the assistance of a surfactant (polyethylene-polypropylene glycol (P123)). Ostwald ripening is the main formation mechanism for the yolk-shelled structure. The photocatalytic activity of the sample is evaluated by monitoring the photodegradation of rhodamine B (RhB) under white light illumination (500 W xenon lamp) with the assistance of hydrogen peroxide (H2O2). The results indicate that the yolk-shelled microspheres display excellent photocatalytic activity and recycling stability. The photocatalytic degradation rate of yolk-shelled MoS2 microspheres is 97.6% after only 30 min, which is much higher than those of MoS2 particles synthesized without P123, MoS2 solid microspheres and commercial MoS2 (Experimental section) (54.7%, 4.6% and 9.6% at 30 min, respectively). The reaction rate constant (k) of the yolk-shelled microspheres for the photodegradation of RhB is 1.19 × 10-1 min-1, which is 1.58, 92.97 and 107.21 times faster than those of MoS2 particles (k2 = 7.51 × 10-2), MoS2 solid microspheres (k3 = 1.28 × 10-3) and commercial MoS2 (k4 = 1.11 × 10-3), respectively. Such a highly desired yolk-shelled structure enables higher multiple light reflections and scattering between the outer spherical shell and the interior core compared with MoS2 particles, MoS2 solid microspheres and commercial MoS2 to provide a more efficient way of enhancing light-harvesting efficiency.
UR - http://www.scopus.com/inward/record.url?scp=85058158606&partnerID=8YFLogxK
U2 - 10.1039/c8qi00878g
DO - 10.1039/c8qi00878g
M3 - 文章
AN - SCOPUS:85058158606
SN - 2052-1553
VL - 5
SP - 3082
EP - 3090
JO - Inorganic Chemistry Frontiers
JF - Inorganic Chemistry Frontiers
IS - 12
ER -