文献类型：期刊文献

英文题名：An advanced TiO2/Fe2TiO5/Fe2O3 triple-heterojunction with enhanced and stable visible-light-driven fenton reaction for the removal of organic pollutants

作者：Deng, Yuanxin;Xing, Mingyang[1];Zhang, Jinlong[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2017

卷号：211

起止页码：157

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20171703596019);WOS:【SCI-EXPANDED(收录号:WOS:000400816200016)】；

基金：This work has been supported by National Nature Science Foundation of China (21577036, 21377038, 21237003 and 21677048), the National Basic Research Program of China (973 Program, 2013CB632403), State Key Research Development Program of China (2016YFA0204200), "Chenguang Program" supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission (14CG30), the Science and Technology Commission of Shanghai Municipality (16JC1401400) and the Fundamental Research Funds for the Central Universities (22A201514021, 222201717003).

语种：英文

外文关键词：Ion-exchange method; Raspberry-like; TiO2/Fe2TiO5/Fe2O3; Photo-Fenton reaction

摘要：The construction of catalysts with high efficiency and stability for heterogeneous Photo-Fenton reaction Heterogeneous (PFR) has been a major challenge for the degradation of organic pollutants. Here, we successfully develop an advanced TiO2/Fe2TiO5/Fe2O3 triple-heterojunction structure by using the mesoporous TiO2 spheres as the substrate via a simple ion-exchange method. The XRD and HRTEM results demonstrate the generation of Fe2TiO5 on the interface between TiO2 and Fe2O3, which can be used as a "bridge" to transfer the photo-excited electrons from TiO2 to Fe2O3. The as-prepared triple-heterojunction has abundant interphase boundaries which greatly improve the migration of photo-excited charges among different components. As a result, the prepared triple-heterojunction has a significantly enhanced PFR activity for the visible-light-driven degradation of methyl orange (MO) and colorless organic pollutant of phenol, compared with the single catalysts of Fe2O3 and TiO2, and the binary-heterojunction of TiO2/Fe2O3. Compared to the traditional Fe2O3 based PFR, the degradation rates of MO and phenol over triple-heterojunction can be increased from 4% to 87% within 10 min irradiation and from 38% to 100% within 60 min irradiation, respectively. And the total organic carbon (TOC) degradation rate of phenol can be up to 85%. Moreover, this advanced triple-heterojunction has a wide pH value range of application in PFR. Either at a pH of 4.0 or 7.0, it shows a much higher and more stable PFR activity for the degradation of MO than the catalysts of Fe2O3 and TiO2/Fe2O3. And the reaction rate of TiO2/Fe2TiO5/Fe2O3 almost keeps changeless even after 10th cycles, suggesting its vast application foreground in the environmental pollutant treatment. (C) 2017 Elsevier B.V. All rights reserved.