TY - JOUR
T1 - Activation and Zr precursor influence on UiO-66-NH2 composites for efficient cationic and anionic dye removal
AU - Hegazy, Sherif
AU - Ghannami, Ayoub
AU - dos Reis, Glaydson S.
AU - Hu, Tao
AU - Brahmi, Rachid
AU - Tuomikoski, Sari
AU - Lassi, Ulla
AU - Srivastava, Varsha
N1 - Publisher Copyright:
© 2024 The Author(s)
PY - 2025/2/5
Y1 - 2025/2/5
N2 - This study investigates the synthesis of UiO-66-NH2@HTC composites, focusing on the control of surface charge, textural properties, and crystallinity. Surface charge modification was achieved through activation processes to enhance affinity for specific pollutants. By utilizing ZrCl4 and ZrOCl2⋅8H2O precursors, the textural properties were optimized, leading to higher mesopore content and improved crystallinity with the ZrOCl2⋅8H2O precursor. The UiO-66-NH2(ZrCl4)@HTC composite exhibited a crystallinity of 51.7 %, with 40 % mesopores and 57 % micropores, while the UiO-66-NH2(ZrOCl2)@HTC composite showed a crystallinity of 60 %, consisting of 60 % mesopores and 37 % micropores. Adsorption followed the Langmuir isotherm model, with maximum adsorption capacities of 263.1 mg/g for methylene blue (MB) and 277.77 mg/g for Congo red (CR), driven by hydrogen bonding and electrostatic interactions. The activated UiO-66-NH2@HTC composites demonstrated remarkable reusability. These findings emphasize the significant role of surface charge modification, pore structure optimization, and crystallinity enhancement in developing high-performance adsorbents.
AB - This study investigates the synthesis of UiO-66-NH2@HTC composites, focusing on the control of surface charge, textural properties, and crystallinity. Surface charge modification was achieved through activation processes to enhance affinity for specific pollutants. By utilizing ZrCl4 and ZrOCl2⋅8H2O precursors, the textural properties were optimized, leading to higher mesopore content and improved crystallinity with the ZrOCl2⋅8H2O precursor. The UiO-66-NH2(ZrCl4)@HTC composite exhibited a crystallinity of 51.7 %, with 40 % mesopores and 57 % micropores, while the UiO-66-NH2(ZrOCl2)@HTC composite showed a crystallinity of 60 %, consisting of 60 % mesopores and 37 % micropores. Adsorption followed the Langmuir isotherm model, with maximum adsorption capacities of 263.1 mg/g for methylene blue (MB) and 277.77 mg/g for Congo red (CR), driven by hydrogen bonding and electrostatic interactions. The activated UiO-66-NH2@HTC composites demonstrated remarkable reusability. These findings emphasize the significant role of surface charge modification, pore structure optimization, and crystallinity enhancement in developing high-performance adsorbents.
KW - Activation
KW - Anionic dye
KW - Cationic dye
KW - Textural properties
KW - UiO-66-NH
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=85205530571&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2024.120785
DO - 10.1016/j.ces.2024.120785
M3 - Article
SN - 0009-2509
VL - 302
JO - Chemical Engineering Science
JF - Chemical Engineering Science
M1 - 120785
ER -