Solvothermal synthesis of Fe-C codoped TiO2 nanoparticles for visible-light photocatalytic removal of emerging organic contaminants in water

被引：56

作者：

Wang, Xiaoping ^{[1
]}

Tang, Yuxin ^{[2
]}

Leiw, Ming-Yian ^{[3
]}

Lim, Teik-Thye ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Civil & Environm Engn, Div Environm & Water Resources Engn, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[3] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

APPLIED CATALYSIS A-GENERAL | 2011年 / 409卷

基金：

新加坡国家研究基金会;

关键词：

Fe-C codoping; Carbonate species; Photocatalytic degradation; Toxicity; TITANIUM-DIOXIDE; DOPED TIO2; SOLAR LIGHT; DEGRADATION; CARBON; PHOTODEGRADATION; 4-CHLOROPHENOL; NANO-TIO2; MECHANISM; OXIDATION;

D O I：

10.1016/j.apcata.2011.10.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Anatase Fe/C-TiO2 nanoparticles were synthesized by a facile solvothermal method. The results showed that Fe was incorporated into TiO2 lattice by substituting Ti4+, while C was present in the form of carbonate species on the surface. Fe3+ dopants could introduce a new dopant energy level into TiO2 band gap while the carbonate species served as photosensitizer. Both of them were responsible for the visible-light photocatalytic activity of the Fe/C-TiO2. In addition, the presence of Fe dopants and carbonate species could favor the formation of surface hydroxyl groups, and inhibit recombination of photo-generated electrons and holes. Moreover, the Fe/C-TiO2 displayed larger surface area than C-TiO2 and Fe-TiO2. The synergistic effects of Fe and C codoping into TiO2 resulted in improved photocatalytic activities of Fe/C-TiO2 for degradation of bisphenol A (BPA) and clofibric acid (CA) as compared to C-TiO2. Fe-TiO2 and P25 under visible light and simulated solar light irradiation. The toxicities of BPA solutions gradually decreased throughout BPA mineralization. The photocatalytic activity of the Fe/C-TiO2 was maintained effectively even after several cyclic experiments. Finally, the possible photocatalytic mechanisms over the Fe/C-TiO2 under visible light and UV irradiation were proposed. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：257 / 266

页数：10

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