TY - JOUR
T1 - Li2Si2O5 nano-brush coated carbon cloth as a potential solution for wastewater treatment
AU - Sun, Bo
AU - Chen, Wenge
AU - Zhang, Hui
AU - Elmarakbi, Ahmed
AU - Fu, Yongqing (Richard)
N1 - Funding information: The authors would like to acknowledge the financial supports from the Science and Technology Project of Shaanxi Province of China (No.2020ZDLGY12-06), Xi’an Science research project of China (No.2021XJZZ0042) and International Exchange Grant (IEC/NSFC/201078) through Royal Society and National Science Foundation of China (NSFC)
PY - 2023/4/1
Y1 - 2023/4/1
N2 - Li2Si2O5 nano-brush coated carbon cloth was synthesized using a hydrothermal method with lithium hydroxide and tetraethyl orthosilicate as the resource chemicals. Its adsorption capabilities for Mn2+, Cu2+ and Ni2+ ions were demonstrated for wastewater treatments, and their corresponding maximum adsorption capacities were 325.60, 314.76 and 270.15 mg/g at 298 K, respectively. Brush-like and highly uniformly Li2Si2O5 nanorods with an average diameter of ∼60 nm were uniformly synthesized onto the carbon cloth. Adsorption experiments showed that the adsorption behaviors for selected heavy metal ions followed both a pseudo-second-order model and a Langmuir isothermal model, indicating that the adsorption process was a monolayer and chemical adsorption one. The key adsorption mechanisms were identified as surface complexation between heavy metal ions and hydroxyl groups and ion-exchanges between heavy metal ions and lithium ions. These brush-like nanorods have advantages of effective adsorption of heavy metal ions in wastewater due to their widely exposed active sites and effective ion diffusion and transport.
AB - Li2Si2O5 nano-brush coated carbon cloth was synthesized using a hydrothermal method with lithium hydroxide and tetraethyl orthosilicate as the resource chemicals. Its adsorption capabilities for Mn2+, Cu2+ and Ni2+ ions were demonstrated for wastewater treatments, and their corresponding maximum adsorption capacities were 325.60, 314.76 and 270.15 mg/g at 298 K, respectively. Brush-like and highly uniformly Li2Si2O5 nanorods with an average diameter of ∼60 nm were uniformly synthesized onto the carbon cloth. Adsorption experiments showed that the adsorption behaviors for selected heavy metal ions followed both a pseudo-second-order model and a Langmuir isothermal model, indicating that the adsorption process was a monolayer and chemical adsorption one. The key adsorption mechanisms were identified as surface complexation between heavy metal ions and hydroxyl groups and ion-exchanges between heavy metal ions and lithium ions. These brush-like nanorods have advantages of effective adsorption of heavy metal ions in wastewater due to their widely exposed active sites and effective ion diffusion and transport.
KW - Lithium disilicate
KW - Carbon cloth
KW - Heavy metal adsorption
KW - Nanostructure
UR - http://www.scopus.com/inward/record.url?scp=85147118061&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2022.123085
DO - 10.1016/j.seppur.2022.123085
M3 - Article
SN - 1873-3794
VL - 310
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 123085
ER -
