Preparation of the additive-modified α-Fe2O3/g-C3N4 Z-scheme composites with improved visible-light photocatalytic activity

The hollow alpha-Fe2O3 (S3) sample with high-activity was obtained by adding H2PO4- and Cu2+ ions via a hydrothermal processes, and the S3/g-C3N4 composites were synthesized by a simple method. The prepared hollow 53 with higher O-v concentration presented higher photocatalytic degradation activity. In contrast with the S3 and g-C3N4, the S3/g-C3N4 composite exhibited superior visible-light photocatalytic activity. The formation of the S3/g-C(3)N(4)Z-scheme heterojunction improved the separation ability of the photoexcited carriers and the redox ability of the catalyst. The synergistic effect of heterojunction and photo-Fenton in the S3/g-C3N4 degradation system promoted the formation of active species, thereby enhancing the visible-light photocatalytic degradation efficiency of p-Nitrophenol. This study provides a fresh insight for p-NP removal in the wastewater.

Automated summary

A hollow alpha-Fe2O3 (S3) sample with high-activity was successfully obtained by adding H2PO4- and Cu2+ ions via a hydrothermal process, and S3/g-C3N4 composites were synthesized using a simple method. The visible-light photocatalytic degradation efficiency of p-Nitrophenol was enhanced through the synergistic effect of heterojunction and photo-Fenton in the S3/g-C3N4 degradation system, providing a new insight for p-NP removal in the wastewater.