Study of adsorption properties of functionalized nanodiamonds in aqueous solutions of metal salts using optical spectroscopy

Dolenko, Tatiana A.; Burikov, Sergey; Laptinskiy, Kirill; Laptinskaya, T. V.; Rosenholm, Jessica M.; Shiryaev, A. A.; Sabirov, A. R.; Власов, И. И.

doi:10.1016/j.jallcom.2013.01.055

Cited by 34 publications

(18 citation statements)

References 14 publications

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“…Up till now, various methods have been developed and used to remove metal ions from wastewater, such as chemical precipitation, coagulation, electrochemical, and adsorption treatments [ 3 – 5 ]. Among these methods, adsorption is a widely applied and promising technology due to its high-efficiency and cost-effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Co2+ from Aqueous Solution by 3-Aminopropyltriethoxysilane Functionalized Montmorillonite with Enhanced Adsorption Capacity

Huang

Gong

et al. 2016

PLoS ONE

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To achieve a satisfactory removal efficiency of heavy metal ions from wastewater, silane-functionalized montmorillonite with abundant ligand-binding sites (-NH2) was synthesized as an efficient adsorbent. Ca-montmorillonite (Ca-Mt) was functionalized with 3-aminopropyl triethoxysilane (APTES) to obtain the APTES-Mt products (APTES1.0CEC-Mt, APTES2.0CEC-Mt, APTES3.0CEC-Mt, APTES4.0CEC-Mt) with enhanced adsorption capacity for Co2+. The physico-chemical properties of the synthesized adsorbents were characterized by spectroscopic and microscopic methods, and the results demonstrated that APTES was successfully intercalated into the gallery of Ca-Mt or grafted onto the surface of Ca-Mt through Si-O bonds. The effect of solution pH, ionic strength, temperature, initial concentrations and contact time on adsorption of Co2+ by APTES-Mt was evaluated. The results indicated that adsorption of Co2+ onto Ca-Mt, APTES1.0CEC-Mt and APTES2.0CEC-Mt can be considered to be a pseudo-second-order process. In contrast, adsorption of Co2+ onto APTES3.0CEC-Mt and APTES4.0CEC-Mt fitted well with the pseudo-first-order kinetics. The adsorption isotherms were described by the Langmuir model, and the maximum adsorption capacities of APTES1.0CEC-Mt, APTES2.0CEC-Mt, APTES3.0CEC-Mt and APTES4.0CEC-Mt were 25.1, 33.8, 61.6, and 61.9 mg·g-1, respectively. In addition, reaction temperature had no impact on the adsorption capacity, while both the pH and ionic strength significantly affected the adsorption process. A synergistic effect of ion exchange and coordination interactions on adsorption was observed, thereby leading to a significant enhancement of Co2+ adsorption by the composites. Thus, APTES-Mt could be a cost-effective and environmental-friendly adsorbent, with potential for treating Co2+-rich wastewater.

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Section: Introductionmentioning

confidence: 99%

Efficient Removal of Co2+ from Aqueous Solution by 3-Aminopropyltriethoxysilane Functionalized Montmorillonite with Enhanced Adsorption Capacity

Huang

Gong

et al. 2016

PLoS ONE

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“…However, our preliminary accelerator mass spectrometry (Martschini, personal communication) and SIMS measurements revealed a problem of contamination of nanodiamonds by silicon: dangling bonds on nanodiamond surfaces may serve as very efficient sorption sites for various elements (e.g., Dolenko et al. ). Silicon is a fairly ubiquitous element, and appears to be efficiently sorbed by nanodiamonds especially during acid dissolution of silicate matrix of a parent meteorite.…”

Section: Implications For Astrophysical Search Of Nanodiamondsmentioning

confidence: 99%

Photoluminescence of silicon‐vacancy defects in nanodiamonds of different chondrites

Shiryaev

Fisenko

Semjonova

et al. 2015

Meteorit & Planetary Scien

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Photoluminescence spectra show that silicon impurity is present in lattice of some nanodiamond grains (ND) of various chondrites as a silicon-vacancy (SiV) defect. The relative intensity of the SiV band in the diamond-rich separates depends on chemical composition of meteorites and on size of ND grains. The strongest signal is found for the size separates enriched in small grains; thus confirming our earlier conclusion that the SiV defects preferentially reside in the smallest (≤ 2 nm) grains. The difference in relative intensities of the SiV luminescence in the diamond-rich separates of individual meteorites are due to variable conditions of thermal metamorphism of their parent bodies and/or uneven sampling of nanodiamonds populations. Annealing of separates in air eliminates surface sp 2 -carbon, consequently, the SiV luminescence is enhanced. Strong and well-defined luminescence and absorption of the SiV defect is a promising feature to locate cold (< 250 °C) nanodiamonds in space.

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“…A general goal is to create a nanocarrier combining an opportunity for tissue diagnostics and an ability to provide a therapeutic effect. Nanodiamonds (ND) are a promising material to accomplish this goal . Combining such properties as stable luminescence, polyfunctionality of the surface which can be specifically modified, active sorption properties, non‐toxicity and biocompatibility, NDs have triggered a high level of interest for their application in biomedicine.…”

Section: Introductionmentioning

confidence: 99%

“…Biomedical applications of ND as fluorescent biomarkers including visualization of processes in cells , as a drug carrier and sorbent of toxic elements have been reported. Typically for biomedical applications, the surfaces of NDs are modified or covered with a shell such as, for example, mesoporous silica shell or copolymers , which have, besides fluorescence properties, higher biocompatibility and higher ability to adsorb and retain medical drugs in comparison with ND.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of nanodiamonds in human urine using artificial neural networks

Laptinskiy

Burikov

Доленко

et al. 2016

Physica Status Solidi (a)

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Phone: þ7 495 939 16 53, Fax: þ7 495 939 11 04This paper presents the results of application of the elaborated methods for monitoring of nanodiamonds in human urine using fluorescence spectroscopy. High efficiency of artificial neural networks applied for recognition and estimation of the concentration of nanodiamonds in urine with a strong autofluorescence background is demonstrated. It was found that minimal concentration of nanodiamonds with strong fluorescence containing nitrogen-vacancy (NV) centers can be detected in urine by fluorescence spectroscopy at a level of 3.06 Â 10 À4 g L À1 ; while use of artificial neural networks for detection of weakly fluorescent detonation nanodiamonds provides reasonably high accuracy of detection, not worse than 6.8 Â 10 À3 g L À1 .

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Study of adsorption properties of functionalized nanodiamonds in aqueous solutions of metal salts using optical spectroscopy

Cited by 34 publications

References 14 publications

Efficient Removal of Co2+ from Aqueous Solution by 3-Aminopropyltriethoxysilane Functionalized Montmorillonite with Enhanced Adsorption Capacity

Efficient Removal of Co2+ from Aqueous Solution by 3-Aminopropyltriethoxysilane Functionalized Montmorillonite with Enhanced Adsorption Capacity

Photoluminescence of silicon‐vacancy defects in nanodiamonds of different chondrites

Monitoring of nanodiamonds in human urine using artificial neural networks

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