TY - JOUR

T1 - Preparation and characterization of a novel photocatalytic self-cleaning PES nanofiltration membrane by embedding a visible-driven photocatalyst boron doped-TiO2–SiO2/CoFe2O4 nanoparticles

AU - Zangeneh, Hadis

AU - Zinatizadeh, Ali Akbar

AU - Zinadini, Sirus

AU - Feyzi, Mostafa

AU - Bahnemann, Detlef

N1 - Funding information: The authors would like to acknowledge Iran National Science Foundation (INSF), Iran, for the full financial support provided for this research work. The authors would also like to thank Razi University, Iran, to provide the required facility to carry out the project. The authors would like to acknowledge Iran National Science Foundation (INSF), Iran, for the full financial support provided for this research work. The authors would also like to thank Razi University , Iran, to provide the required facility to carry out the project.

PY - 2019/1/31

Y1 - 2019/1/31

N2 - Novel self-cleaning PES nanofiltration membranes were successfully synthesized via the phase inversion method with different amounts of the boron doped-TiO 2–SiO 2 cobalt ferrite (B-TiO 2–SiO 2/CoFe 2O 4) nanophotocatalyst. The nanofiltration performance was investigated by the rejection of direct red 16 and COD removal of the biologically treated palm oil mill effluent (POME). The addition of the B-TiO 2–SiO 2/CoFe 2O 4 nanoparticles into the polymeric casting solution improved porosity, morphology, structure, pure water flux (PWF), antifouling properties and separation performance of the embedded membranes due to hydrophilic behavior and photocatalytic properties of the B-TiO 2–SiO 2/CoFe 2O 4 nanoparticles. The B-TiO 2–SiO 2/CoFe 2O 4 nanoparticles can degrade adsorbed organic foulants on the membrane surface (reversible fouling) or deposited/trapped fouling agents into the membrane pores (irreversible fouling). The prevention of the interaction between organic foulant and hydrophilic membrane improves antifouling properties and wettability of the modified membranes. The membrane with 0.5 wt% of the B-TiO 2–SiO 2/CoFe 2O 4 nanoparticle had the highest pure water flux and flux recovery ratio (FRR) with the best separation performance. However, at high concentration of nanoparticles, agglomeration of the nanoparticles on membrane surface/pores resulted in pore blocking, roughness membrane surface which led to slightly reduction of PWF, FRR and separation performance. The obtained results were also confirmed by contact angle measurement, scanning electron microscopy (SEM) and atomic force microscopy analysis (AFM).

AB - Novel self-cleaning PES nanofiltration membranes were successfully synthesized via the phase inversion method with different amounts of the boron doped-TiO 2–SiO 2 cobalt ferrite (B-TiO 2–SiO 2/CoFe 2O 4) nanophotocatalyst. The nanofiltration performance was investigated by the rejection of direct red 16 and COD removal of the biologically treated palm oil mill effluent (POME). The addition of the B-TiO 2–SiO 2/CoFe 2O 4 nanoparticles into the polymeric casting solution improved porosity, morphology, structure, pure water flux (PWF), antifouling properties and separation performance of the embedded membranes due to hydrophilic behavior and photocatalytic properties of the B-TiO 2–SiO 2/CoFe 2O 4 nanoparticles. The B-TiO 2–SiO 2/CoFe 2O 4 nanoparticles can degrade adsorbed organic foulants on the membrane surface (reversible fouling) or deposited/trapped fouling agents into the membrane pores (irreversible fouling). The prevention of the interaction between organic foulant and hydrophilic membrane improves antifouling properties and wettability of the modified membranes. The membrane with 0.5 wt% of the B-TiO 2–SiO 2/CoFe 2O 4 nanoparticle had the highest pure water flux and flux recovery ratio (FRR) with the best separation performance. However, at high concentration of nanoparticles, agglomeration of the nanoparticles on membrane surface/pores resulted in pore blocking, roughness membrane surface which led to slightly reduction of PWF, FRR and separation performance. The obtained results were also confirmed by contact angle measurement, scanning electron microscopy (SEM) and atomic force microscopy analysis (AFM).

KW - Nanofiltration (NF)

KW - Self-cleaning

KW - Visible-driven boron doped-TiO –SiO cobalt ferrite magnetic nanoparticle

UR - http://www.scopus.com/inward/record.url?scp=85053315005&partnerID=8YFLogxK

U2 - 10.1016/j.seppur.2018.09.030

DO - 10.1016/j.seppur.2018.09.030

M3 - Article

VL - 209

SP - 764

EP - 775

JO - Separation and Purification Technology

JF - Separation and Purification Technology

SN - 1383-5866

ER -