A short review on recent progress in mesoporous silicas for the removal of metal ions from water
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REVIEW
A short review on recent progress in mesoporous silicas for the removal of metal ions from water Sushilkumar A. Jadhav1 · Vinay S. Patil1 · Preeti S. Shinde1 · Saurabh S. Thoravat1 · Pramod S. Patil1,2 Received: 11 April 2020 / Accepted: 15 June 2020 © Institute of Chemistry, Slovak Academy of Sciences 2020
Abstract Mesoporous silica nanoparticles (MSNs) are used as nanoadsorbents for the removal of pollutants from water. MSNs have shown very high adsorption efficiencies for various toxic metal ions from water. Recently, significant new advancements are noticed in this field of research with a potential to develop a water purification technology based on MSNs. In this overview, latest reports about the use of porous silica particles for the removal of metal ions from water are listed and critically analyzed. The maximum adsorption efficiencies of the newly developed porous silica-based materials for different metal ions are studied and comparatively analyzed. Recent trends show that, the majority of works are focused on development of hybrid and functional porous silica nanoparticles for the removal of Pb, Cd, Cu, and Cr metal ions from water. The collective information presented here will help to design future research strategies for the development and use of MSNs for removal of various pollutants from water. Graphical abstract
Keywords Porous silicas · Functional silicas · Nanoadsorbents · Meal ions · Water purification Abbreviations MSNs Mesoporous silica nanoparticles MCM-41 Mobil Composition of Matter No. 41 * Sushilkumar A. Jadhav [email protected] * Pramod S. Patil [email protected] 1
School of Nanoscience and Technology, Shivaji University, Kolhapur, Vidyanagar, Kolhapur 416004, Maharashtra, India
Department of Physics, Shivaji University, Kolhapur, Vidyanagar, Kolhapur 416004, Maharashtra, India
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SBA-15 Santa Barbara Amorphous-15 TEOS Tetraethoxysilicate CTAB Cetyltrimethylammonium TMB Trimethyl benzene NPs Nanoparticles QDs Quantum dots SSA Specific surface area MOF Molecular organic framework
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Introduction Mesoporous silica nanoparticles (MSNs) were first discovered in 1970s. They are comprised of porous structures with hundreds of atomic level arranged mesopores (Kumar et al. 2017). The porous networks can be of different shape and size. The MSNs have very large surface area due to ordered and regular arrangements of the pores. The pores are of size between 2 and 50 nm range and the pore size can be tuned to desired values. Due the porous structure, MSNs have large pore volume and high surface area. MSNs show high chemical and biological stability with good biocompatibility (Xie et al. 2016; Kumar et al. 2017). The most common mesoporous silica particles are MCM-41 (Mobil Composition of Matter No. 41), MCM-48 and SBA-15/(Santa Barbara Amorphous-15). MCM-41 and SBA-15 type porous silicas have hexagonal array of pores and SBA-15 silicas have the large pore size. Another mesoporous silica prepared from kanemite (NaHSi2O5∙3H2O), and C
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