尖晶石型铁氧体异质结的构建及用于有机污染物光催化降解的研究进展  

Research Progress on Fabrication and Application in Photocatalytic Degradation of Organic Pollutants of Spinel Ferrite Heterojunction

作　　者：陈丹丹 李燕[1] 王爱国[1] CHEN Dandan;LI Yan;WANG Aiguo(Anhui Key Laboratory of Advanced Building Materials,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学先进建筑材料安徽省重点实验室,合肥230601

出　　处：《材料导报》2023年第16期35-44,共10页Materials Reports

基　　金：安徽省高校自然科学基金重点项目(KJ2020A0476);安徽省重点研究与开发计划项目(202004b11020033)。

摘　　要：随着工业生产的快速发展,有机废水的排放对环境造成了严重的污染。光催化技术利用太阳能降解有机污染物,被视为极具前途的污水处理技术之一。然而传统光催化剂(TiO_(2)、ZnO、ZnS等)对可见光的利用率低、光生载流子复合率高和回收困难等问题限制了其在光催化领域的实际应用。研究者提出将传统半导体与尖晶石型铁氧体材料复合制备尖晶石型铁氧体异质结光催化剂,通过异质结的界面作用抑制光催化剂中光生电荷的复合。同时,尖晶石型铁氧体优异的磁学性能为异质结光催化剂在废水处理中的回收和再利用提供了保证。目前,大量的尖晶石型铁氧体在合成异质结光催化剂领域已经取得了显著的研究成果,例如Fe_(3)O_(4)、CoFe_(2)O_(4)、CuFe_(2)O_(4)、ZnFe_(2)O_(4)和NiFe_(2)O_(4)等。本文将尖晶石型铁氧体异质结分为Ⅱ型、肖特基型、Z型(传统Z型、全固态Z型、直接Z型)和S型,并具体介绍了各类尖晶石型铁氧体异质结材料光生电荷的分离途径、各类晶石型铁氧体异质结材料目前存在的缺陷以及尖晶石型铁氧体异质结光催化剂在水体治理领域应用的现状,为构建出高载流子分离率的尖晶石型铁氧体异质结光催化剂提供能带匹配理论参考。Discharge of organic wastewater into the environment following the rapid development of industrial production has led to serious pollution.Photocatalytic technology using solar energy to degrade organic pollutants is considered one of the most valuable strategies for water treatment.However,traditional photocatalysts(e.g.,TiO_(2),ZnO,and ZnS)suffer from the inefficient use of visible light,high recombination rate of photon-generated carriers,and poor recycling performance,which hinder their widespread application.Researchers have proposed the preparation of the spinel ferrite heterojunction photocatalyst by combining a traditional semiconductor and spinel ferrite.Photocarrier recombination is inhibited by the interface of the heterojunction,and the excellent magnetic properties of the ferrite guarantee the recovery and reuse of the photocatalyst in wastewater treatment.At present,a large number of spinel ferrites such as Fe_(3)O_(4),CoFe 2O_(4),CuFe_(2)O_(4),ZnFe_(2)O_(4)and NiFe_(2)O_(4)have led to remarkable research results in the field of heterojunction photocatalysts.In this paper,the spinel ferrite heterojunctions are divided into type-Ⅱ,Schottky,Z-scheme(traditional,all-solid-state,and direct),and step-scheme heterojunctions.The separation strategies of the photogenerated charges,defects in various spinel ferrite heterojunction materials,as well as their applications in the field of water treatment are discussed,providing a theoretical reference for the construction of spinel ferrite heterojunction photocatalysts with high carrier separation rates.

关 键 词：尖晶石型铁氧体 异质结 光催化降解 载流子迁移 

分 类 号：O649[理学—物理化学]