Synthesis And Characterization Of Silver Nanoparticles embedded In Polyaniline Nanocomposite 

Abstract

Conducting polyaniline/silver nanoparticles (PANI-Ag) nanocomposite was synthesized by in-situ polymerization of aniline in the presence of silver nitrate as precursor. Nanocomposite was characterized by UV-VIS, PL, XRD, FTIR, SEM and TGA to study the effect of silver nanoparticles embedded into PANI on the morphology, structure, crystalline and thermal stability of the conducting polyaniline. The optical studies show that the absorption edge of PANI-Ag nanocomposite exhibits the significant blue shift. The photoluminescence studies show that the emission peak shifted towards the blue when compared to that of bulk PANI-Ag. The broadening sharp peaks in the XRD pattern indicate that the synthesized PANI-Ag nanocomposite is nanocrystalline. FTIR reveals the presence of silver metal ions uniformly embedded into PANI. SEM reveals the rod structure surface morphology of PANI-Ag nanocomposite. Thermogravimetric analysis suggests the presence of silver and also an oligomeric component in the nanocomposite. The combination of PANI as a semiconducting polymer with silver as a noble metal may produce hybrid material that behaves as semiconductor at low temperature and as metal at high temperature.

A green approach to prepare silver nanoparticles loaded gum acacia/poly(acrylate) hydrogels

“…However, in some studies a fair agreement has been reported among the experimental and theoretical values. For example, Thakur et al [33] have reported swelling behaviors of chitosan/xanthan gum blended hydrogels and found an excellent agreement for chitosan/xanthan gum hydrogels of varying compositions. The regression values obtained in the present work for second order model are in the range of 0.9700-0.9965, thus proving the fitness of this model.…”

“…However, the X-ray diffraction pattern of sample Ag NPs/HG1 exhibits strong peaks at 38.12 • , 44.28 • and 66.46 • which are attributed to the Brags reflections at (1 1 1), (2 0 0) and (2 2 0) planes of face centered cubic (FCC) crystals of silver nanoparticles [32,33]. The TG analysis profiles for plain sample HG1 and Ag NPs/HG1 composite hydrogel are shown in Fig.…”

Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

“…The polymerization of aniline (An) in the presence of Ag + ions gave poly(An)/SN nanocomposites with electrical conductance subject to controlled variation as well as UV-absorbing and photoluminescent properties [129]. The use of substituted anilines as comonomers improves the heat stability of the nanocomposites but decreases their conductivity [130].…”

Fabrication of Polymer Based Schottky Diode Using Pani/Ag Nano Composite

“…Among these devices considerable attention is given to the fabrication and characterization of Schottky diodes using polymer and metals because Schottky diode offer several advantages over other diodes such as low forward voltage drop, less heat, high efficiency, high current density and low capacitance [1][2][3][4].Among all conducting polymers, polyaniline (PANI) and its derivatives are more attracted because of its chemical stability, simple preparation, high conductivity and low cost [5][6][7]. Bulk silver shows the highest electrical conductivity among metals at room temperature and it is an adept for producing conducting composites [8,9]. Schottky diode preparation using PANI/Ag is another important subject and have great technological importance for wide variety of applications such as Photovoltaic systems, power supply, RF detector etc.…”