Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-CN composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NHCl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-CN is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-CN composite shows promising degradation efficiency which is 40.6% higher than that of pure g-CN. The degradation rate improves from 0.007 min to 0.022 min, which is a comparable photocatalytic performance compared with other g-CN-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-CN to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-CN efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-CN and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-CN efficiently, but also broadens the application of SAPOs in the photocatalytic field.
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| http://dx.doi.org/10.3390/ma12233948 | DOI Listing |
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