Effect of Ce and Mn co-doping on photocatalytic performance of sol-gel TiO2

被引：56

作者：

Tbessi, Imen ^{[1
]}

Benito, Monica ^{[2
]}

Molins, Elies ^{[2
]}

Llorca, Jordi ^{[3
,4
]}

Touati, Azza ^{[1
]}

Sayadi, Sami ^{[5
]}

Najjar, Wahiba ^{[1
,6
]}

机构：

[1] Univ Tunis El Manar, Fac Sci Tunis, Lab Mat Chem & Catalysis, Tunis 2092, Tunisia

[2] Inst Ciencia Mat Barcelona ICMAB CSIC, C Tillers S-N,Campus UAB, Bellaterra 08193, Spain

[3] Univ Politecn Cataluna, Inst Energy Technol, Dept Chem Engn, EEBE, Barcelona 08019, Spain

[4] Univ Politecn Cataluna, EEBE, Barcelona Res Ctr Multiscale Sci & Engn, Barcelona 08019, Spain

[5] Ctr Biotechnol Sfax, Lab Environm Bioproc, BP 1177, Sfax 3018, Tunisia

[6] Univ Carthage, Higher Inst Preparatory Studies Biol & Geol Soukr, Tunis 1054, Tunisia

来源：

SOLID STATE SCIENCES | 2019年 / 88卷

关键词：

Photocatalysis; Titanium dioxide; Co-doping; Manganese and cerium; Diclofenac; DOPED MESOPOROUS TIO2; WASTE-WATER; ADVANCED OXIDATION; DEGRADATION; DICLOFENAC; TITANIA; PHARMACEUTICALS; NANOCOMPOSITES; TRANSFORMATION; NANOPARTICLES;

D O I：

10.1016/j.solidstatesciences.2018.12.004

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Co-doped titanium dioxide was synthesized by doping with manganese (Mn) and cerium (Ce) through a sol-gel method for the degradation of diclofenac (DCF). The synthesized products were successfully characterized by X-ray diffraction (XRD), Raman spectroscopy, Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), Nitrogen physisorption at 77 K, X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance (UV-DRS), photoluminescence spectroscopy (PL) and total organic carbon (TOC). It was shown that co-doping increased the specific surface area, improved the visible light absorption and extended the lifetime of photogenerated charge carriers. Furthermore, the results of the photocatalytic experiments show that the photodegradation rate of diclofenac can be approached by pseudo first-order kinetics and it followed the Langmuir-Hinshelwood model very well. The co-doped catalyst with 0.6% Mn and 1% Ce molar ratios appeared to be the most photoactive catalyst with 94% of DCF removal and an apparent rate constant of 0.012 min(-1).

引用

页码：20 / 28

页数：9

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