Abstract
Mesoporous thiol and guanidine-modified silicas with narrow pore size distribution have been prepared by the sol-gel technique. The surface area of the silicas was modified by treatment with 3-mercaptopropyltrimethoxysilane (MPTMS) and the guanidine polymers polyacrylate guanidine (PAG) and polymethacrylate guanidine (PMAG). The mesoporous silicas were characterized by nitrogen adsorption-desorption analysis, Fourier transform infrared spectroscopy, and laser diffraction. The materials obtained were used as adsorbents for removing heavy metal ions (Cu2+) from water. It was found that modification of the silica surface by treatment with MPTMS and guanidine polymers provides new sorbents with high adsorption capacity compared with unmodified silica. The equilibrium adsorption capacity for Cu2+ ions on the surface of silicas modified by PAG and PMAG was 65 and 99.8 mg/g, respectively. Moreover, the modified silicas were tested for antimicrobial activity, in vitro, against the Gram-positive prokaryote Staphylococcus aureus and the Gram-negative prokaryote Escherichia coli. The results showed that only silica modified with guanidine polymers had high antimicrobial activity. To summarize, silica modified by treatment with guanidine polymers is more effective than thiol-modified silica for removing heavy metal ions from aqueous solution and can also be used as a biocide for surface sterilization.
| Original language | English |
|---|---|
| Pages (from-to) | 2437-2451 |
| Number of pages | 15 |
| Journal | Research on Chemical Intermediates |
| Volume | 41 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2015 |
| Externally published | Yes |
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Keywords
- Adsorbent
- Antimicrobial activity
- Biocide
- Heavy metals
- Mesoporous silicas
- Sol-gel
- Surface area
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Novel biocide multifunctional materials based on mesoporous silicas modified by treatment with guanidine polymers or mercaptopropyltrimethoxysilane : Synthesis, characterization, and applications. / Timin, Alexander; Rumyantsev, Evgeniy.
In: Research on Chemical Intermediates, Vol. 41, No. 4, 2015, p. 2437-2451.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Novel biocide multifunctional materials based on mesoporous silicas modified by treatment with guanidine polymers or mercaptopropyltrimethoxysilane
T2 - Synthesis, characterization, and applications
AU - Timin, Alexander
AU - Rumyantsev, Evgeniy
PY - 2015
Y1 - 2015
N2 - Mesoporous thiol and guanidine-modified silicas with narrow pore size distribution have been prepared by the sol-gel technique. The surface area of the silicas was modified by treatment with 3-mercaptopropyltrimethoxysilane (MPTMS) and the guanidine polymers polyacrylate guanidine (PAG) and polymethacrylate guanidine (PMAG). The mesoporous silicas were characterized by nitrogen adsorption-desorption analysis, Fourier transform infrared spectroscopy, and laser diffraction. The materials obtained were used as adsorbents for removing heavy metal ions (Cu2+) from water. It was found that modification of the silica surface by treatment with MPTMS and guanidine polymers provides new sorbents with high adsorption capacity compared with unmodified silica. The equilibrium adsorption capacity for Cu2+ ions on the surface of silicas modified by PAG and PMAG was 65 and 99.8 mg/g, respectively. Moreover, the modified silicas were tested for antimicrobial activity, in vitro, against the Gram-positive prokaryote Staphylococcus aureus and the Gram-negative prokaryote Escherichia coli. The results showed that only silica modified with guanidine polymers had high antimicrobial activity. To summarize, silica modified by treatment with guanidine polymers is more effective than thiol-modified silica for removing heavy metal ions from aqueous solution and can also be used as a biocide for surface sterilization.
AB - Mesoporous thiol and guanidine-modified silicas with narrow pore size distribution have been prepared by the sol-gel technique. The surface area of the silicas was modified by treatment with 3-mercaptopropyltrimethoxysilane (MPTMS) and the guanidine polymers polyacrylate guanidine (PAG) and polymethacrylate guanidine (PMAG). The mesoporous silicas were characterized by nitrogen adsorption-desorption analysis, Fourier transform infrared spectroscopy, and laser diffraction. The materials obtained were used as adsorbents for removing heavy metal ions (Cu2+) from water. It was found that modification of the silica surface by treatment with MPTMS and guanidine polymers provides new sorbents with high adsorption capacity compared with unmodified silica. The equilibrium adsorption capacity for Cu2+ ions on the surface of silicas modified by PAG and PMAG was 65 and 99.8 mg/g, respectively. Moreover, the modified silicas were tested for antimicrobial activity, in vitro, against the Gram-positive prokaryote Staphylococcus aureus and the Gram-negative prokaryote Escherichia coli. The results showed that only silica modified with guanidine polymers had high antimicrobial activity. To summarize, silica modified by treatment with guanidine polymers is more effective than thiol-modified silica for removing heavy metal ions from aqueous solution and can also be used as a biocide for surface sterilization.
KW - Adsorbent
KW - Antimicrobial activity
KW - Biocide
KW - Heavy metals
KW - Mesoporous silicas
KW - Sol-gel
KW - Surface area
UR - http://www.scopus.com/inward/record.url?scp=84924852314&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84924852314&partnerID=8YFLogxK
U2 - 10.1007/s11164-013-1358-y
DO - 10.1007/s11164-013-1358-y
M3 - Article
VL - 41
SP - 2437
EP - 2451
JO - Research on Chemical Intermediates
JF - Research on Chemical Intermediates
SN - 0922-6168
IS - 4
ER -