Abstract
Novel Cd2P2O7/Ag3PO4 photocatalysts containing different mass fractions of Cd2P2O7 were synthesized by a hydrothermal method. The photocatalysts were characterized by X-ray diffractometry, transmission electron microscopy, X-ray photoelectron spectroscopy, Electron spin resonance (ESR), Fourier transform infrared spectrometry, ultraviolet–visible absorption spectroscopy and photoluminescence spectroscopy. Photocatalytic activity was decided by the effective separation and low recombination rate of photogenerated electron-hole pairs. During the experiments, the Cd2P2O7/Ag3PO4 composites possessed fierce electron- hole separation capacity. In particular, the 1wt% Cd2P2O7/Ag3PO4 catalyst displayed higher photocatalytic performance than pure Ag3PO4 under visible-light irradiation (λ>420nm). The ESR spectrum showed the main active species during the methyl orange degradation were ·OH and ·O2−.
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