Enhanced photoactivity of N-doped TiO2 for Cr(VI) removal: Influencing factors and mechanism

Shu Qin Wang; Wen Bo Liu; Peng Fu; Wei Liang Cheng

Korean Journal of Chemical Engineering, Vol.34, No.5, 1584-1590, May, 2017

DOI10.1007/s11814-017-0003-7 Export Citation

Enhanced photoactivity of N-doped TiO2 for Cr(VI) removal: Influencing factors and mechanism

Shu Qin Wang^†, Wen Bo Liu, Peng Fu¹, and Wei Liang Cheng^†

School of Environmental Science and Engineering, North China Electric Power University, Baoding, Hebei 071003, P. R. China
¹Sailhero Environmental Protection Hi-tech Co., Ltd., No. 251, Xiangjiang Road, Shijiazhuang City, Hebei, P. R. China

E-mail:,

To further enhance the photoactivity of virgin TiO2, we prepared N-doped TiO2 (N-TiO2) by sol-gel method and used it to remove Cr(VI) ions from water under visible light. The catalysts were characterized by TEM, XRD, BET and UV-vis techniques. Better crystalline structure, larger specific surface area and decreased band-gap width were obtained after the insertion of N atoms into TiO2 lattice. Several influencing factors were also investigated. The removal efficiency of Cr(VI) increases with the decrease of initial Cr(VI) concentration or the increase of catalyst dosage. Addition of glucose or some inorganic ions (Mg2+, Al3+) can promote the photoreduction process by improving the quantum efficiency. The kinetics and mechanism were discussed as well.

Keywords:Photocatalytic Reduction;Cr(VI);N-doped TiO2;Influencing Factors;Kinetics;Mechanism

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[Referenced By]

[1] Zhang XY, Chen HS, Fang DN, J. Solid State Electrochem., 20(10), 2835 (2016)

[2] Bao YH, Zhang XY, Zhang X, Yang L, Zhang XY, Chen HS, Yang M, Fang DN, J. Power Sources, 321, 120 (2016)

[3] Zhang XY, Yang L, Hao F, Chen HS, Yang M, Fang DN, Nanomaterials, 5(4), 1985 (2015)

[4] Zhang XY, Hao F, Chen SH, Fang DN, Mech. Mater., 91, 351 (2015)

[5] Giannakas AE, Seristatidou E, Deligiannakis Y, Konstantinou I, Appl. Catal. B: Environ., 132-133, 460 (2013)

[6] Wang HJ, Wu XJ, Wang YL, Jiao ZB, Yan SW, Huang LH, Chinese J. Catal., 32(4), 637 (2011)

[7] Pifferi V, Spadavecchia F, Cappelletti G, Paoli EA, Bianchi CL, Falciola L, Catal. Today, 209, 8 (2013)

[8] Sun Q, Li H, Zheng SL, Sun ZM, Appl. Surf. Sci., 311, 369 (2014)

[9] Liu W, Ni JR, Yin XC, Water Res., 53, 12 (2014)

[10] Sun ZM, Zheng LM, Zheng SL, Frost RL, J. Colloid Interface Sci., 404, 102 (2013)

[11] Zheng HR, Cui YJ, Zhang JS, Chinese J. Catal., 32(1), 100 (2011)

[12] Yun HJ, Lee DM, Yu S, Yoon J, Park HJ, Yi J, J. Mol. Catal. A-Chem., 378(11), 221 (2013)

[13] Hu SZ, Wang AJ, Li X, Holger Lowe, J. Phys. Chem. Solids, 71, 156 (2010)

[14] Xie MZ, Feng YJ, Luan P, Bian J, Jing LQ, Chinese J. Inorg. Chem., 30(9), 2081 (2014)

[15] Cendrowski K, Jedrzejczak M, Peruzynska M, Dybusb A, Drozdzik M. Ewa Mijowska, Alloys Comp., 605, 173 (2014)

[16] Wang SQ, Zhang DL, Adv. Mater. Res., 610-613, 1497 (2013)

[17] Chen XY, Kuo DH, Lu DF, Chem. Eng. J., 295, 192 (2016)

[18] Zhang K, Wang XD, He TN, Guo XL, Feng YN, Powder Technol., 253, 608 (2014)

[19] Nolan NT, Synnott DW, Seery MK, Hinder SJ, Wassenhoven AV, Pillai SC, Hazard. Mater., 211, 88 (2012)

[20] Salarian AA, Hami Z, Mirzaei N, Mohseni SM, Asadi A, Bahrami H, Vosoughi M, Alinejad A, Zare MR, J. Mol. Liq., 220, 183 (2016)

[21] Ren XC, Chang GZ, Zhu YM, Liu HF, Cao M, Environ. Chem., 28(06), 288 (2009)

[22] Peter A, Mihaly-Cozmuta L, Cozmuta AM, Camelia N, Tudoran LB, Baia L, Mater. Technol., 29(3), 129 (2014)