TY - JOUR
T1 - TiO2/CDs modified thin-film nanocomposite polyamide membrane for simultaneous enhancement of antifouling and chlorine-resistance performance
AU - Vatanpour, Vahid
AU - Paziresh, Shadi
AU - Naziri Mehrabani, Seyed Ali
AU - Feizpoor, Solmaz
AU - Habibi-Yangjeh, Aziz
AU - Koyuncu, Ismail
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - In this study, a titanium dioxide/carbon dots (TiO2/CDs) hydrophilic nanocomposite photocatalyst with different contents was embedded in the polyamide layer of reverse osmosis (RO) membrane via interfacial polymerization to increase desalination performance and antifouling properties. The modified membranes showed smoother surfaces with reduced contact angles, causing to improve membrane fouling resistance. TiO2/CDs nanocomposite, due to its photocatalytic activity, showed more flux recovery ratio (FRR) after irradiation of UV light during the washing process. The FRR was enhanced from 94.4 to 97.1% for 0.01 wt% TiO2/CDs RO membrane by UV irradiation. The hydrophilic functional groups with negative charge increased the desalination efficiency of the modified membranes (99.2% NaCl rejection for 0.01 wt% TiO2/CDs membrane). The membrane containing 0.01 wt% TiO2/CDs presented the highest pure water and NaCl solution flux of (59.6 and 54.6 L·m−2·h−1) at 15 bar, respectively. In addition, the used nanoparticles improved the chlorine resistance of the membranes. As a result, TiO2/CDs nanocomposite with little amounts could be applied as a suitable nanofiller to increase the permeability, antifouling properties, and chlorine resistance for RO membrane modification.
AB - In this study, a titanium dioxide/carbon dots (TiO2/CDs) hydrophilic nanocomposite photocatalyst with different contents was embedded in the polyamide layer of reverse osmosis (RO) membrane via interfacial polymerization to increase desalination performance and antifouling properties. The modified membranes showed smoother surfaces with reduced contact angles, causing to improve membrane fouling resistance. TiO2/CDs nanocomposite, due to its photocatalytic activity, showed more flux recovery ratio (FRR) after irradiation of UV light during the washing process. The FRR was enhanced from 94.4 to 97.1% for 0.01 wt% TiO2/CDs RO membrane by UV irradiation. The hydrophilic functional groups with negative charge increased the desalination efficiency of the modified membranes (99.2% NaCl rejection for 0.01 wt% TiO2/CDs membrane). The membrane containing 0.01 wt% TiO2/CDs presented the highest pure water and NaCl solution flux of (59.6 and 54.6 L·m−2·h−1) at 15 bar, respectively. In addition, the used nanoparticles improved the chlorine resistance of the membranes. As a result, TiO2/CDs nanocomposite with little amounts could be applied as a suitable nanofiller to increase the permeability, antifouling properties, and chlorine resistance for RO membrane modification.
KW - Chlorine resistance
KW - Nanofiller
KW - PSf support
KW - TFC-RO membrane
KW - TiO/CDs nanocomposite
UR - http://www.scopus.com/inward/record.url?scp=85121729981&partnerID=8YFLogxK
U2 - 10.1016/j.desal.2021.115506
DO - 10.1016/j.desal.2021.115506
M3 - Article
AN - SCOPUS:85121729981
SN - 0011-9164
VL - 525
JO - Desalination
JF - Desalination
M1 - 115506
ER -