Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Abstract

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 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-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

Investigation on Cu2O Combined g-C3N4/ZnO Heterostructures For High-Performance Photocatalytic Dye Degradation Under Visible-Light Exposure

“…No substantial changes were noticed in the structures and active functional groups of the photocatalyst before and after reused, which speci es that the g-C 3 N 4 /ZnO/Cu 2 O heterostructured photocatalyst was greatly stable. The as-obtained photocatalytic activity of this work was better for with the formerly reported photo-degradation [38,[45][46][47]. Also, the photocatalytic performance of g-C 3 N 4 /ZnO/Cu 2 O composite photocatalyst was greater when compared to the commercial P25 TiO 2 NPs [48].…”

In situ self-assembly fabrication of ultrathin sheet-like CuS modified g–C3N4 heterojunction and its enhanced visible-light photocatalytic performance

“…Preparation of g-C 3 N 4 . The synthesis process was carried out according to our previous works [14,15]. Typically, 15 g of ammonium chloride and 3 g of dicyandiamide were dissolved in 50 ml of water, and the mixture was heated to 80 °C under magnetically stirring until the materials did not stick to the glass rod.…”

Facile synthesis of nitrogen-defective g-C3N4 for superior photocatalytic degradation of rhodamine B

“… 1 The precautions of the negative impacts of this situation were inadequate, which has led to a global crisis, including resource shortages, pollution of the living environment (water pollution, air pollution, and soil pollution), and ecological pollution damage. Among them, environmental pollution has become a prominent problem faced by humankind; 2 the quality of water changes and air pollution seriously affect human health and development. 3 Of the environmental pollutions, water pollution is one of the most serious issues and worthy of concern.…”