Nanomaterials on the Basis of Chelating Agents, Metal Complexes, and Organometallics for Environmental Purposes

Kharisov, Boris I.; Kharissova, Oxana V.; Méndez, Ubaldo Ortiz

doi:10.1002/9781118845530.ch7

Cited by 9 publications

(5 citation statements)

References 56 publications

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“…Numerous nanomaterials have been exploited in many fields, including electron devices [16], health care [17], energy [18], etc. The past decades have also witnessed the increasing applications of nanomaterials in the environmental protection field [19]. In general, nanomaterials are materials whose external dimensions are in the nanoscale (usually 1–100 nm) or those who have a nanoscale internal structure/surface [20].…”

Section: Introductionmentioning

confidence: 99%

Nanomaterials for the Removal of Heavy Metals from Wastewater

et al. 2019

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Removal of contaminants in wastewater, such as heavy metals, has become a severe problem in the world. Numerous technologies have been developed to deal with this problem. As an emerging technology, nanotechnology has been gaining increasing interest and many nanomaterials have been developed to remove heavy metals from polluted water, due to their excellent features resulting from the nanometer effect. In this work, novel nanomaterials, including carbon-based nanomaterials, zero-valent metal, metal-oxide based nanomaterials, and nanocomposites, and their applications for the removal of heavy metal ions from wastewater were systematically reviewed. Their efficiency, limitations, and advantages were compared and discussed. Furthermore, the promising perspective of nanomaterials in environmental applications was also discussed and potential directions for future work were suggested.

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Section: Introductionmentioning

confidence: 99%

Nanomaterials for the Removal of Heavy Metals from Wastewater

et al. 2019

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“…In general, AgNPs are prepared by chemical and photochemical methods [7,8]. These methods are complex and employ high thermal energy and hazardous chemicals, both reducing and stabilising agents, which might be harmful to environment and human health and limits the application of AgNPs in the medical field [9,10]. Therefore, biological molecules are searched for using as non-toxic reducing agents.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of AgNPs Coated Mesoporous Silica Nanoparticles Using Tyrosine as Reducing/Stabilising Agent

Ratirotjanakul

Sioloetwong

Suteewong

et al. 2018

MSF

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A novel, simple and environmental friendly approach to fabricate silver nanoparticles (AgNPs) on mesoporous silica nanoparticles (MSNs) using tyrosine (Tyr) as biological reducing agent was developed. The functionalization of Tyr with MSNs (Tyr-MSNs) (150 nm in length) by the sol-gel process was confirmed by the characteristic peaks of amino, carboxyl and silanol groups appeared in FTIR spectrum and the change of the zeta potential from 0 mV at pH 2 to-60 mV at pH 12. Then, AgNPs were formed on the surface of Tyr-MSNs (Tyr-MSN@AgNPs) via only reducibility from phenolic group of Tyr and catalytic activity from base at room temperature. TEM images and UV-Visible absorption band at 420 nm supported the obtained AgNPs (18 nm at pH 11) were tightly bound to Tyr-MSNs even after centrifugation at high speed. These Tyr-MSN@AgNPs would be potentially used as drug carrier in biomedical applications.

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“…This has fostered the exploration of preorganized metal ion coordinating ligands for a wide range of applications . These include bioimaging diagnostics, biomedical/biological sciences, metal ion separation for environmental protection, radioactive waste recovery, and catalysis research. − The selective binding of charged analyte species to receptor elements on planar semiconducting surfaces is a phenomenon that has fueled research in the development of sensing systems that combine semiconductor electronics with ligand–analyte interactions. − …”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Surfaces Modified with Carboxymethylthio Ligands for Chelate-Assisted Trapping of Copper

Adongo

Neubert

Sun³

et al. 2017

ACS Appl. Mater. Interfaces

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The metal ion chelating property was conferred onto silicon (Si) and gold (Au) surfaces by direct electrografting of the 4-[(carboxymethyl)thio]benzenediazonium cation (4-CMTBD). Infrared spectroscopic ellipsometry showed the presence of characteristic phenyl and carbonyl vibrational bands on the functionalized surfaces as a proof of existence of surface-bound organic units of 4-[(carboxymethyl)thio]benzene, (4-CMTB). The loss of diazonium group (N≡N) upon electrografting of 4-CMTBD was investigated using IR spectroscopy. A Faradaic efficiency of about 18.8-20.0% was realized in mass deposition experiments for grafting 4-CMTB on the Au surface using an electrochemical quartz crystal microbalance technique. Raman spectroscopy performed on the Si-(4-CMTB) surface after treatment with copper (Cu) ion solution provided evidence of metal ion chelation based on an observed v(Cu-O) peak at about 487 cm and a v(Cu-S) signal at about 267 cm. The binding of Cu ions by the chelating ligands also caused a red shift of about 10 cm in the Raman spectrum of the Si-(4-CMTB)-Cu surface within the spectral region, characteristic of the v(C-O) signal. X-ray photoelectron spectroscopy investigations showed indications of the Cu(II) ion species chelated by the surface-bound carboxymethylthio ligands. The functionalized surface, Si-(4-CMTB), constitutes an alternative metal ion chelating surface that may potentially be developed for applications in trace-level trapping of Cu ions.

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Nanomaterials on the Basis of Chelating Agents, Metal Complexes, and Organometallics for Environmental Purposes

Cited by 9 publications

References 56 publications

Nanomaterials for the Removal of Heavy Metals from Wastewater

Nanomaterials for the Removal of Heavy Metals from Wastewater

Green Synthesis of AgNPs Coated Mesoporous Silica Nanoparticles Using Tyrosine as Reducing/Stabilising Agent

Fabrication and Characterization of Surfaces Modified with Carboxymethylthio Ligands for Chelate-Assisted Trapping of Copper

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