Li2Si2O5 Nano-brush Coated Carbon Cloth as a Potential Solution for Wastewater Treatment

Bo Sun, Wenge Chen*, Hui Zhang, Ahmed Elmarakbi, Yongqing (Richard) Fu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.
Original languageEnglish
Article number123085
JournalSeparation and Purification Technology
Early online date7 Jan 2023
Publication statusE-pub ahead of print - 7 Jan 2023

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