Carbon Quantum Dots/BiPO4 Nanocomposites with Enhanced Visible-light Absorption and Charge Separation

doi:10.15541/jim20170283

Abstract

Abstract:

In this study, a CQDs/BiPO₄nanocomposite with enhanced visible-light absorption and charge separation was fabricated via a one-step hydrothermal reaction. The photocatalytic activity of the CQDs/BiPO₄nanocomposite was evaluated by degradation of rhodamine B (RhB). The result showed that the CQDs/BiPO₄ composite exhibited superior photocatalytic performance to pure BiPO₄ under simulated solar light, as well as under visible light irradiation. Its enhanced photocatalytic performance could be ascribed to the excellent light harvesting properties, which increased utilization rate of solar energy, electron transfer efficiency and reservoir ability of the nanocompsites, facilitating the charge separation efficiency of the composite.

Key words: photocatalysis, carbon quantum dots, BiPO₄, electron transfer

CLC Number:

TQ174

ZHANG Zhi-Jie, XU Jia-Yue, ZENG Hai-Bo, ZHANG Na. Carbon Quantum Dots/BiPO₄ Nanocomposites with Enhanced Visible-light Absorption and Charge Separation[J]. Journal of Inorganic Materials, 2018, 33(5): 582-586.

Figures/Tables 6

Fig. 1 XRD patterns of pure BiPO4 and CQDs/BiPO4 composites with different amounts of CQDs

Fig. 2 TEM image of the CQDs/BiPO4 composite (2.4wt%) (a) and high resolution TEM image of the CQDs/BiPO4 composite (b)

Fig. 3 UV-Vis diffuse reflectance spectra of the as-prepared samples

Fig. 4 (a) Degradation efﬁciency of RhB as a function of time by pure BiPO4 and CQDs/BiPO4 composites with different amounts of CQDs under simulated solar light irradiation; degradation efﬁciency of RhB (b) and phenol (c) as a function of time by pure BiPO4 and CQDs/BiPO4 composites (2.4wt%) under visible light irradiation (λ>420 nm)

Fig. 5 Transient photocurrent response curves of pure BiPO4 and CQDs/BiPO4 composite (2.4wt%)

Fig. 6 Photocatalytic degradation of RhB by CQDs/BiPO4 composite (2.4wt%) with different scavengers

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Carbon Quantum Dots/BiPO₄ Nanocomposites with Enhanced Visible-light Absorption and Charge Separation

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