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

Sun, Bo, Chen, Wenge, Zhang, Hui, Elmarakbi, Ahmed and Fu, Yong Qing (2023) Li2Si2O5 Nano-brush Coated Carbon Cloth as a Potential Solution for Wastewater Treatment. Separation and Purification Technology, 310. p. 123085. ISSN 1873-3794

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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.

Item Type: Article
Additional Information: 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)
Uncontrolled Keywords: Lithium disilicate, Carbon cloth, Heavy metal adsorption, Nanostructure
Subjects: H100 General Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 03 Jan 2023 10:14
Last Modified: 10 Feb 2023 15:45

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