Final published version
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Theory-driven design of cadmium mineralizing layered double hydroxides for environmental remediation
AU - Li, Zixian
AU - Xu, Nuo
AU - Ren, Jing
AU - Hao, Haigang
AU - Gao, Rui
AU - Kong, Xianggui
AU - Yan, Hong
AU - Hua, Xiao
AU - Peng, Yung-Kang
AU - Ma, Shulan
AU - O'Hare, Dermot
AU - Zhao, Yufei
PY - 2024/8/14
Y1 - 2024/8/14
N2 - The environmental concern posed by toxic heavy metal pollution in soil and water has grown. Ca-based layered double hydroxides (LDHs) have shown exceptional efficacy in eliminating heavy metal cations through the formation of super-stable mineralization structures (SSMS). Nevertheless, it is still unclear how the intricate coordination environment of Ca2+ in Ca-based LDH materials affects the mineralization performance, which hinders the development and application of Ca-based LDH materials as efficient mineralizers. Herein, we discover that, in comparison to a standard LDH, the mineralization efficiency for Cd2+ ions may be significantly enhanced in the pentacoordinated structure of defect-containing Ca-5-LDH utilizing both density functional theory (DFT) and ab initio molecular dynamics (AIMD) simulations. Furthermore, the calcination-reconstruction technique can be utilized to successfully produce pentacoordinated Ca-5-LDH. Subsequent investigations verified that Ca-5-LDH exhibited double the mineralization performance (421.5 mg g−1) in comparison to the corresponding pristine seven coordinated Ca-7OH/H2O-LDH (191.2 mg g−1). The coordination-relative mineralization mechanism of Ca-based LDH was confirmed by both theoretical calculations and experimental results. The understanding of LDH materials and their possible use in environmental remediation are advanced by this research.
AB - The environmental concern posed by toxic heavy metal pollution in soil and water has grown. Ca-based layered double hydroxides (LDHs) have shown exceptional efficacy in eliminating heavy metal cations through the formation of super-stable mineralization structures (SSMS). Nevertheless, it is still unclear how the intricate coordination environment of Ca2+ in Ca-based LDH materials affects the mineralization performance, which hinders the development and application of Ca-based LDH materials as efficient mineralizers. Herein, we discover that, in comparison to a standard LDH, the mineralization efficiency for Cd2+ ions may be significantly enhanced in the pentacoordinated structure of defect-containing Ca-5-LDH utilizing both density functional theory (DFT) and ab initio molecular dynamics (AIMD) simulations. Furthermore, the calcination-reconstruction technique can be utilized to successfully produce pentacoordinated Ca-5-LDH. Subsequent investigations verified that Ca-5-LDH exhibited double the mineralization performance (421.5 mg g−1) in comparison to the corresponding pristine seven coordinated Ca-7OH/H2O-LDH (191.2 mg g−1). The coordination-relative mineralization mechanism of Ca-based LDH was confirmed by both theoretical calculations and experimental results. The understanding of LDH materials and their possible use in environmental remediation are advanced by this research.
U2 - 10.1039/d4sc02860k
DO - 10.1039/d4sc02860k
M3 - Journal article
C2 - 39148794
VL - 15
SP - 13021
EP - 13031
JO - Chemical Science
JF - Chemical Science
SN - 2041-6520
IS - 32
ER -