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Facile Preparation of MCM-41/Ag2O Nanomaterials with High Iodide-Removal Efficiency TEXT SIZE: A A A

The elimination of iodide (I-) from water is a tough subject due to its low adsorption tendency and high mobility. In this work, MCM-41/Ag2O nanomaterials were prepared, characterized, and employed to adsorb I- from water. The Ag2O nanoparticles were dispersed homogeneously in the pores or at the surface of the MCM-41 support, and the Ag2O nanoparticles in the pores had small particles sizes due to the confinement of the mesoporous channel. The prepared MCM-41/Ag2O nanomaterials exhibited a higher specific surface area than previously reported Ag2O-based composites. The adsorption of I- by the nanomaterials was able to reach equilibrium at 180 min. The MCM-41/Ag2O nanomaterials showed a better adsorption capacity per unit mass of Ag2O than pure Ag2O nanoparticles and previously reported Ag2O-based composites prepared using other supports. Furthermore, the MCM-41/Ag2O nanomaterials exhibited high selectivity for I- in the presence of high concentrations of competitive anions, such as Cl- or Br-, and could function in a wide range of pH. The chemical reaction between Ag2O and I- and the surface adsorption were the main adsorption mechanisms. These results indicate that MCM-41/Ag2O nanomaterials are a promising and efficient adsorbent material suitable for the removal of I- for practical application.

Publication name

 Nanomaterials, Volume 12, Issue 20, Article Number 3678, DOI 10.3390/nano12203678, Published OCT 2022


 Yu, Wenlin; Dong, Qinpeng; Yu, Wenbin; Wan, Quan; Chen, Xiuli

Corresponding author(s) 

 Chen, Xiuli
 Guilin Univ Technol, Sch Mat Sci & Engn, Key Lab Nonferrous Mat & New Proc Technol, Minist Educ, Guilin 541004, Peoples R China
 Yu, Wenbin


 -Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China
 -Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Author(s) from IGCAS   Yu, Wenbin; Yu, Wenlin; Dong, Qinpeng; Wan, Quan

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