SOL-GEL DERIVED SENSOR MATERIALS FOR USE IN AQUEOUS TRANSITION METAL ION DETECTION

1992 ◽  
Vol 286 ◽  
Author(s):  
L. M. Yates ◽  
D. Arbuthnot ◽  
H.J. Harmon ◽  
E. T. Knobbe
Keyword(s):  
Metal Ion ◽  
Sol Gel ◽  
Chemical Analyses ◽  
Host Matrix ◽  
Local Conditions ◽  
Metal Ion Detection ◽  
Chemical Transducers ◽  
Luminescence Behavior ◽  
Absorption Characteristics

ABSTRACTOpto-chemical transducers, which exhibit changes in luminescence and/or absorption characteristics as a function of local conditions, are currently of great interest for use in performing quantitative chemical analyses. Present research is focused on the preparation and characterization of novel optrode materials which may be remotely interrogated via optical fiber carriers. The approach under investigation involves preparation of sol-gel derived films which are sensitized by the entrapment of analyte-complexing organic probe molecules. Zn(II)aq induced perturbations to the luminescence behavior of a porphyrin derivative entrapped within a porous sol-gel derived host matrix are detailed.

Synthesis and characterization of macroporous europium-doped Ca12Al14O33 (C12A7:Eu3+) and its application in metal ion detection

2019 ◽  
Vol 43 (21) ◽  
pp. 8315-8324
Author(s):  
Hui Yang ◽  
Rui Wang ◽  
Yaozu Wang ◽  
Jianzhong Jiang ◽  
Xingzhong Guo
Keyword(s):  
Heat Treatment ◽  
Metal Ion ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Practical Application ◽  
Ion Detection ◽  
Gel Method ◽  
Sol Gel Method ◽  
Metal Ion Detection

Macroporous europium-doped Ca12Al14O33 (C12A7:Eu3+) was prepared via a sol–gel method followed by heat-treatment, and the resultant macroporous C12A7:Eu3+ shows potential for practical application in metal ion detection and has a good response to Pb2+ ions.

Electrical characterization of functionalized platinum electrodes and ISFET sensors for metal ion detection

2006 ◽  
Vol 26 (1) ◽  
pp. 149-153 ◽  
Author(s):  
M. Ben Ali ◽  
T. Homri ◽  
Y. Korpan ◽  
A. Abdelgani ◽  
M. Ali Maaref ◽  
...  
Keyword(s):  
Metal Ion ◽  
Electrical Characterization ◽  
Platinum Electrodes ◽  
Ion Detection ◽  
Metal Ion Detection

Sol-gel synthesis and characterization of CuO–based nanosystems

2002 ◽  
Vol 737 ◽  
Author(s):  
Lidia Armelao ◽  
Davide Barreca ◽  
Manuel Bertapelle ◽  
Gregorio Bottaro ◽  
Cinzia Sada ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Copper Acetate ◽  
Dip Coating ◽  
Silica Matrix ◽  
Synthesis And Characterization ◽  
Host Matrix ◽  
X Ray ◽  
Sol Gel Synthesis

ABSTRACTThis paper is focused on the sol-gel synthesis and characterization of CuO-based nanosystems both in the form of supported films and as guest nanoclusters embedded in a silica matrix. In both cases copper acetate (Cu(CH3COO)2 · H2O) was used as Cu source and, for the CuO :SiO2 nanocomposite systems, tetraethoxysilane (Si(OC2H5)4, TEOS) was adopted as silica precursor. Films were obtained by a dip-coating procedure and subsequently treated in air between 100 and 900°C. The system evolution on thermal annealing was studied by X-ray photoelectron spectroscopy (XPS), Glancing-Incidence X-ray diffraction (GIXRD) and optical absorption. Irrespective of the processing conditions, the formation of tenorite (CuO) crystallites with nanometric dimension was observed. In the nanocomposite samples, copper was homogeneously distributed in the host matrix and stable CuO nanoclusters (φ ≈ 15 nm) were obtained.

Sol–Gel Synthesis and Characterization of Silica Polyamine Composites: Applications to Metal Ion Capture

2012 ◽  
Vol 4 (3) ◽  
pp. 1573-1584 ◽  
Author(s):  
Jesse J. Allen ◽  
Edward Rosenberg ◽  
Erik Johnston ◽  
Carolyn Hart
Keyword(s):  
Metal Ion ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Silica Polyamine Composites ◽  
Sol Gel Synthesis

Plasmonic Structures for Near Infrared Applications

2014 ◽  
Vol 1629 ◽  
Author(s):  
Francesco Floris ◽  
Franco Marabelli ◽  
Maddalena Patrini ◽  
Lucia Fornasari ◽  
Francesco Quochi ◽  
...  
Keyword(s):  
Near Infrared ◽  
Sol Gel ◽  
Research Work ◽  
Infrared Range ◽  
Active Device ◽  
Host Matrix ◽  
Sensing Applications ◽  
Device Applications ◽  
Emission Quenching

ABSTRACTWe report on the development of a plasmonic-photonic coupled platform based on a plasmonic periodic nanostructure and a host matrix for active media in the visible-near infrared range, constituted by a thin film of sol-gel glass. Here, we report on preliminary results about two main tasks of the research work. On one side, we have studied and optimized the surface that supports plasmonic resonances with tunable wavelengths. On the other side, we focused on improving the sol-gel techniques to form and deposit thin films appropriate for covering the previous surface as well as to protect it (i.e. for sensing applications), embed suitable fluorophores (for active device applications) while avoiding metal-induced radiative emission quenching. Besides structural and optical characterization of the considered structures and films, finite-difference time-domain numerical simulations have been performed, in order to give a feedback on the structure features and thereby interpret its optical response.

scholarly journals Photocatalytic Degradation of Levofloxacin by Cu doped TiO2 under Visible LED Light

2021 ◽  
pp. 182-198
Author(s):  
K.S. Varma
Keyword(s):  
Sol Gel ◽  
Pollutant Concentration ◽  
Catalyst Loading ◽  
Visible Light Absorption ◽  
Gel Method ◽  
Doped Tio2 ◽  
Led Light ◽  
Antibiotic Drug ◽  
Absorption Characteristics

Degradation performance of Cu-TiO2 photocatalytic materials against a widely used antibiotic drug levofloxacin (LFX) was investigated under visible LED light source of 40 W. Cu-TiO2 (0.25-1.0 wt%) nanomaterials are prepared through reverse micelle mediated modified sol-gel method. Characterization of synthesized Cu-TiO2 samples are performed by XRD, UV-Vis, and DLS techniques. The doping of 0.5 wt% copper in TiO2 shown lower crystallite size (5.79 nm) and visible light absorption characteristics with energy band gap of 2.84 eV. 0.5 wt% Cu-TiO2 photocatalyst has shown significant LFX degradation of 75.5% with catalyst loading of 1 g/L and initial pollutant concentration of 50 mg/L.

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