A review on exploration of Fe_2O_3 photocatalyst towards degradation of dyes and organic contaminants

摘要

Photocatalytic degradation is among the promising technology for removal of various dyes and organic contaminants from environment owing to its excellent catalytic activity, low energy utilization, and low cost. As one of potential photocatalysts, Fe_2O_3 has emerged as an important material for degradation of numerous dyes and organic contaminants caused by its tolerable band gap, wide harvesting of visible light, good stability and recyclability. The present review thoroughly summarized the classification, synthesis route of Fe_2O_3 with different morphologies, and several modifications of Fe_2O_3 for improved photocatalytic performance. These include the incorporation with supporting materials, formation of heterojunction with other semiconductor photocatalysts, as well as the fabrication of Z-scheme. Explicitly, the other photocatalytic applications of Fe_2O_3, including for removal of heavy metals, reduction of CO_2, evolution of H_2, and N_2 fixation are also deliberately discussed to further highlight the huge potential of this catalyst. Moreover, the prospects and future challenges are also comprised to expose the unscrutinized criteria of Fe_2O_3 photocatalyst. This review aims to contribute a knowledge transfer for providing more information on the potential of Fe_2O_3 photocatalyst. In the meantime, it might give an idea for utilization of this photocatalyst in other environmental remediation application.