Facile synthesis of Mn/N-doped TiO2 on wood-based activated carbon fiber as an efficient visible-light-driven photocatalyst

文献类型： 外文期刊

第一作者： Li, Dongna

作者： Li, Dongna;Chen, Yin;Yin, Fen;Zhu, Lizhi;Ma, Xiaojun;Li, Jianing

作者机构：

期刊名称：JOURNAL OF MATERIALS SCIENCE （ 影响因子：4.22； 五年影响因子：3.69 ）

ISSN： 0022-2461

年卷期： 2018 年 53 卷 16 期

页码：

收录情况： SCI

摘要： The exploration of highly efficient and stable visible-light-driven photocatalysts for wastewater treatment has been recognized as one of the most challenging topics in environmental remediation. In this study, we report a new type of Mn/N co-doped TiO2 supported on wood-based activated carbon fiber (Mn-N/TiO2-WACF) composite material that can be synthesized via sol-gel method. XRD indicates that the nano-TiO2 particles in the composites are in the anatase phase (except when calcined at 850 A degrees C) and the average crystallite size is approximately 23-33 nm. Doping with Mn and N significantly inhibits the crystal phase transformation of TiO2 from anatase to rutile. Photocatalytic experiments confirm that the Mn-N/TiO2-WACF catalysts are highly efficient and robust for the photodegradation of methylene blue under visible light irradiation (lambda > 420 nm). Mn-N/TiO2-WACF exhibits the highest photocatalytic activity (reaches 99%) after calcined at 550 A degrees C. The introduction of Mn and N not only improves the light adsorption and redox activity of TiO2, but also promotes photochemical stability because of narrow band gap energy and lower recombination rate of photoinduced electron-hole pairs. Composite photocatalysts such as these materials are important in the ongoing effort to design and explore new low cost, high efficiency, robust photocatalytic materials.

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