Catalytic activity of TiO2/sepiolites in the degradation of rhodamine B aqueous solution.

Nguyen Tien Thao, Doan Thi Huong Ly, Dinh Minh Hoan, Han Thi Phuong Nga


TiO2/sepiolite catalysts were prepared by suspension of titanium dioxide and support in solvent accompanying by calcination. The characterization of the obtained powder has been examined by some physical means including XRD, SEM, FT-IR, UV-Vis. The sepiolite support possesses fibrous structure. X-ray diffraction analysis pointed out that the TiO2 particles are firmly distributed on fibrous sepiolite matrix. All TiO2/sepiolite samples were tested for the degradation of rhodamine B and showed a high catalytic activity. The experimental data showed that the degradation efficiency of rhodamine B is correlated with the amount of TiO2 loadings and oxidant behavior. At room temperature, the conversion of rhodamine B reaches 99-100 % over 6.0 wt% TiO2/sepiolite catalyst.

Keywords. TiO2, rhodamine B, sepiolite, degradation, photocatalysis.


TiO2, rhodamine B, sepiolite, degradation, photocatalysis.

Full Text:



Simphiwe P. Buthelezi, Ademola O. Olaniran, and Balakrishna Pillay. Textile Dye Removal from Wastewater Effluents Using Bioflocculants Produced by Indigenous Bacterial Isolates, Molecules, 17, 14260-14274 (2012).

Nguyen Tien Thao, Do Thi Trang. Decolorization of methylene blue from aqueous solution using Mg-Fe-Al layered double hydroxides with H2O2, Asian Journal of Chemistry, 25, 8097-8101 (2013).

Meiqing Fan, Songxia Hu, Bo Ren, Jun Wang, Xiaoyan Jing. Synthesis of nanocomposite TiO2/ZrO2 prepared by different templates and photocatalytic properties for the photodegradation of Rhodamine B, Powder Technol., 235, 27-32 (2013).

Youji Li, Shuguo Sun, Mingyuan Ma, Yuzhu

Ouyang, Wenbin Yan. Kinetic study and model of the photocatalytic degradation of rhodamine B (RhB) by a TiO2-coated activated carbon catalyst: Effects of initial RhB content, light intensity and TiO2 content in the catalyst, Chem. Eng. J., 142, 147-155 (2008).

Noureddine Barka, Samir Qourzal, Ali Assabbane, Abederrahman Nounah, Yhya Ait-Ichou. Factors influencing the photocatalytic degradation of Rhodamine B by TiO2-coated non-woven paper, Journal of Photochemistry and Photobiology A: Chemistry, 195, 346-351 (2008).

Maria Jesus Belzunce, Safrario Mendiorroz and Jerzy Haber. Modification of sepiolite by treatment with fluorides: Structural and Textural Changes, Clays and Clay Minerals, 46(6), 603-614 (1998).

E. Galan, Properties and Applications of Palygorskite-Sepiolite Clays, Clay Minerals, 31, 443-453 (1996).

Mehmet Uqurlu. Adsorption of a textile dye onto activated sepiolite, Microporous and Mesoporous Materials 119(1-3), 276-283 (2009).

Osman Duman, Sibel Tunc, Tulin Gurkan Polat. Adsorptive removal of triarylmethane dye (Basic Red 9) from aqueous solution by sepiolite as effective and low-cost adsorbent, Microporous and Mesoporous Materials 210, 176-184 (2015).

Nguyen Tien Thao, Doan Thi Huong Ly, Ta Thi Huyen, Han Thi Phuong Nga. Characteristics and Rhodamine B Adsorption Ability of modified sepiolite, VNU Journal of Science, Submitted, 2016.

Nguyen Tien Thao, Trinh Dang Tuan, Oxidation of styrene over TiO2/Di Linh clay catalysts, VN Journal of Chemistry, 49, 517-521 (2011).

A. Esteban-Cubillo, R. Pina-Zapardiel, J. S. Moya, M.F. Barba, C. Pecharroman. The role of magnesium on the stability of crystalline sepiolite structure, Journal of the European Ceramic Society, 28, 1763-1768 (2008).

Debajyoti Mahanta, Giridhar Madras, S. Radhakrishnan, and Satish Patil. Adsorption and Desorption Kinetics of Anionic Dyes on Doped Polyaniline, J. Phys. Chem. B, 113, 2293-2299 (2009).

E. Eren, O. Cubuk H. Ciftci, B. Eren, B. Caglar. Adsorption of basic dye from aqueous solutions by modified sepiolite: Equilibrium, kinetics and thermodynamics study, Desalination, 252, 88-96 (2010).

Yalei Zhang, Daojie Wang, Gaoke Zhang. Photocatalytic degradation of organic contaminants by TiO2/sepiolite composites prepared at low temperature, Chem. Eng. J., 173, 1-10 (2011).

Vu Van Nhuong, Nguyen Van Noi, Nguyen Tien Thao. Synthesis and characterization of TiO2/SBA-15 materials used as catalysts for the treatment of red phenol in water, VN Journal of Chemistry, 50(4A), 346-350 (2012).

T. Aarthi and Giridhar Madras. Photocatalytic Degradation of Rhodamine Dyes with Nano-TiO2, Ind. Eng. Chem. Res., 46, 7-14 (2007).

Oliver Merka, Viktor Yarovyi, Detlef W. Bahnemann, and Michael Wark. pH-Control of the Photocatalytic Degradation Mechanism of Rhodamine B over Pb3Nb4O13, J. Phys. Chem. C 115, 8014–8023 (2011).

Nguyen Tien Thao, Nguyen Thi Tuoi, Do Thi Trang. Degradation of methylene blue in water over Mg-Fe-Al hydrotalcites, Vietnam Journal of Chemistry, 51(5), 534-538 (2013).

Bai Cuiping, Gong Wenqi, Feng Dexin, Xian Mo, Zhou Qi, Chen Shaohua, Ge Zhongxue, Zhou Yanshui. Natural graphite tailings as heterogeneous Fenton catalyst for the decolorization of rhodamine B, Chem. Eng. J., 197, 306-313 (2012).