Multiple Effect of Thermal Treatment Approach on PVDF Membranes: Permeability Enhancement and Silver Nanoparticles Immobilization

In this study, we report a straightforward route for the synthesis of silver nanoparticles by chitosan under moderate thermal treatment. Chitosan acted as both a reducing agent and a capping agent. The synthesized nanocomposites could function as effective catalysts for the reduction of 4-nitrophenol in the presence of sodium borohydride.

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A thermal treatment approach to reduce microscale void formation in blanket nanoporous gold films

Scripta Materialia ◽

10.1016/j.scriptamat.2008.11.027 ◽

2009 ◽

Vol 60 (6) ◽

pp. 435-438 ◽

Cited By ~ 22

Author(s):

E SEKER ◽

M REED ◽

M BEGLEY

Keyword(s):

Thermal Treatment ◽

Treatment Approach ◽

Void Formation ◽

Nanoporous Gold ◽

Gold Films

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Anomalous Absorption of Isolated Silver Nanoparticulate Films in Visible Region of Electromagnetic Field

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2008.d252 ◽

2008 ◽

Vol 8 (2) ◽

pp. 739-744 ◽

Cited By ~ 1

Author(s):

Sang Woo Kim ◽

Bang Jae Hui ◽

Dong-Sik Bae

Keyword(s):

Silver Nanoparticles ◽

Thermal Treatment ◽

Absorption Band ◽

Theoretical Prediction ◽

Surface Plasmon ◽

Anomalous Absorption ◽

Surface Plasmon Band ◽

Plasmon Band ◽

Maximum Absorbance ◽

Nanoparticulate Film

Anomalous absorption of isolated silver nanoparticulate films with different morphological patterns prepared by the wet colloidal route and followed by thermal treatment were investigated. A polymer embedded silver nanoparticulate film thermally treated at 200 °C showed maximum absorbance at ∼412 nm. The peakposition of the surface plasmon band was slightly different but still consistent with theoretical prediction derived by the Mie theory. An isolated nanopariculate film thermally treated at 300 °C showed anomalous absorption. Its maximum absorption band was shifted to green regime of 506.9 nm and the bandwidth at half-maximum absorbance of the surface plasmon band was greatly broadened. The plasmon band and its bandwidth were much deviated compared to the theoretical prediction calculated for the silver nanoparticles in the surrounding medium of air and poly(vinyl pyrrolidone) or soda-lime-silica glass. Even though there was no significant growth of silver nanoparticles during thermal treatment at 300 °C, the anomalous absorption was observed. The anomalous absorption was not attributed to effects of particle shape and size but to effects of pores induced by development of a great number of pores in the nanoparticulate film. The anomalous absorption greatly decreased with increase in heating temperature from 400 °C to 500 °C. The extraordinary plasmon damping of the isolated film decreased and the plasmon absorption band was re-shifted to violet regime of 416 nm because of large decrease in size of particles with dramatic change of pore morphology from circular pores with rim to small continuous pores induced by spontaneous formation of new silver nanoparticles.

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Role of cobalt cations in short range antiferromagnetic Co3O4 nanoparticles: a thermal treatment approach to affecting phonon and magnetic properties

Scientific Reports ◽

10.1038/s41598-017-18563-9 ◽

2018 ◽

Vol 8 (1) ◽

Cited By ~ 29

Author(s):

Swati R. Gawali ◽

Ashish Chhaganlal Gandhi ◽

Shrikrushna Shivaji Gaikwad ◽

Jayashree Pant ◽

Ting-Shan Chan ◽

...

Keyword(s):

Magnetic Properties ◽

Thermal Treatment ◽

Short Range ◽

Treatment Approach ◽

Co3o4 Nanoparticles

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Formation of luminescent and nonluminescent silver nanoparticles in silicate glasses by near-infrared femtosecond laser pulses and subsequent thermal treatment: the role of halogenides

Optical Engineering ◽

10.1117/1.oe.55.6.067101 ◽

2016 ◽

Vol 55 (6) ◽

pp. 067101 ◽

Cited By ~ 11

Author(s):

Dmitry A. Klyukin ◽

Victor D. Dubrovin ◽

Alisa S. Pshenova ◽

Sergey E. Putilin ◽

Teimur A. Shakhverdov ◽

...

Keyword(s):

Silver Nanoparticles ◽

Thermal Treatment ◽

Femtosecond Laser ◽

Near Infrared ◽

Laser Pulses ◽

Femtosecond Laser Pulses ◽

Silicate Glasses ◽

Subsequent Thermal Treatment

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Colorimetric Sensor Based on Silver Nanoparticle – Embedded Polymethacrylate Matrix

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1040.923 ◽

2014 ◽

Vol 1040 ◽

pp. 923-927 ◽

Cited By ~ 5

Author(s):

Nataliya A. Gavrilenko ◽

Nadezhda V. Saranchina ◽

Mikhail A. Gavrilenko

Keyword(s):

Hydrogen Peroxide ◽

Silver Nanoparticles ◽

Thermal Treatment ◽

Aqueous Medium ◽

Silver Nanoparticle ◽

Colorimetric Assay ◽

Colorimetric Sensor ◽

Yellow Color ◽

Transparent Color ◽

Polymethacrylate Matrix

Silver nanoparticles synthesized by a reagent less method involving only thermal treatment have been used in colorimetric assay for the detection of hydrogen peroxide. The silver nanoparticles were directly synthesized in polymethacrylate matrix (PMM) by method based on the reduction of the inorganic precursor AgNO3, which was pre-adsorbed by PMM from solution, through thermal treatment. These silver nanoparticles were characterized using absorption spectroscopy. It was shown that the silver nanoparticles in PMM (Ag – PMM) had ability for reduction of hydrogen peroxide with silver oxidation. As a result, the yellow color of Ag – PMM samples was gradually changed to transparent color depending on the hydrogen peroxide concentrations. Hence, the silver nanoparticles in PMM could be used as colorimetric sensor for hydrogen peroxide in aqueous medium.

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