TY - JOUR
T1 - Chitosan modified N, S-doped TiO2 and N, S-doped ZnO for visible light photocatalytic degradation of tetracycline
AU - Farhadian, Negin
AU - Akbarzadeh, Rokhsareh
AU - Pirsaheb, Meghdad
AU - Jen, Tien Chien
AU - Fakhri, Yadolah
AU - Asadi, Anvar
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - N, S-doped TiO2 (NST), N, S-doped ZnO (NSZ) and their composite with chitosan (NST/CS, NSZ/CS) were synthesized by sol gel-hydrothermal method. The prepared samples were characterized using XRD, FTIR, TEM and BET techniques. These photocatalysts were used for the photocatalytic degradation of tetracycline under visible light irradiation. At screening test, NST/CS had the highest tetracycline degradation efficiency of 91% for duration of 20 min under visible light. The blending of chitosan with NST increases the rate of photocatalytic degradation of tetracycline about 2 times. A detail characterization including HRTEM, SEM, EDS and DRS were conducted for NST/CS, the most active photocatalyst in this study. Photocatalytic activity test was conducted by varying tetracycline concentration, irradiation time, catalyst's concentration and pH using response surface methodology to find out the optimum condition for photocatalytic activity. The reusability of as-synthesized NST/CS was assessed which due to its high recoverability can be applied as an effective catalyst for degradation of organic substances in water and wastewater especially for degradation of emerging pollutants such pharmaceutical pollutants. The results from this work show a promising material for local authorities and pharmaceutical facilities to use for the treatment of pharmaceutical pollutants and tetracycline removal in water resource.
AB - N, S-doped TiO2 (NST), N, S-doped ZnO (NSZ) and their composite with chitosan (NST/CS, NSZ/CS) were synthesized by sol gel-hydrothermal method. The prepared samples were characterized using XRD, FTIR, TEM and BET techniques. These photocatalysts were used for the photocatalytic degradation of tetracycline under visible light irradiation. At screening test, NST/CS had the highest tetracycline degradation efficiency of 91% for duration of 20 min under visible light. The blending of chitosan with NST increases the rate of photocatalytic degradation of tetracycline about 2 times. A detail characterization including HRTEM, SEM, EDS and DRS were conducted for NST/CS, the most active photocatalyst in this study. Photocatalytic activity test was conducted by varying tetracycline concentration, irradiation time, catalyst's concentration and pH using response surface methodology to find out the optimum condition for photocatalytic activity. The reusability of as-synthesized NST/CS was assessed which due to its high recoverability can be applied as an effective catalyst for degradation of organic substances in water and wastewater especially for degradation of emerging pollutants such pharmaceutical pollutants. The results from this work show a promising material for local authorities and pharmaceutical facilities to use for the treatment of pharmaceutical pollutants and tetracycline removal in water resource.
KW - Chitosan
KW - Nitrogen and sulfur co-doped TiO
KW - Nitrogen and sulfur co-doped ZnO
KW - Photocatalysis
KW - Tetracycline
UR - http://www.scopus.com/inward/record.url?scp=85063739474&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2019.03.217
DO - 10.1016/j.ijbiomac.2019.03.217
M3 - Article
C2 - 30940592
AN - SCOPUS:85063739474
SN - 0141-8130
VL - 132
SP - 360
EP - 373
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -