Development and characterisation of novel hybrid materials of modified ZnO-SiO₂ and polyaniline for adsorption of organic dyes

New Hybrid Adsorbents Based on Polyaniline and Polypyrrole with Silicon Dioxide: Synthesis, Characterization, Kinetics, Equilibrium, and Thermodynamic Studies for the Removal of 2,4-Dichlorophenol

“…The reduction in the surface area is attributed to the PAni:PPy matrix blocking the pores of the SiO2, thus reducing the surface area [27]. TGA is widely used to study the thermal degradation of materials [9]. The technique analyzes the weight loss associated with a continuous increase in temperature.…”

“…The second (wt) level is up to 9.95% at 300 °C due to the evaporation of absorbed moisture and residual monomer or oligomer loss and the following third (wt) level reached up to 420 °C due to the chain degradation and decomposition of the material being 29.03%. In addition, a steady state decrease in TGA is widely used to study the thermal degradation of materials [9]. The technique analyzes the weight loss associated with a continuous increase in temperature.…”

“…Hence, it is very significant to find a way to eliminate 2,4-DCP. Among the existing treatment methods, including photocatalytic degradation [5], electrochemical oxidation [6], membrane filtration [7], flocculation coagulation [8], adsorption [9], and so on, the adsorption process is one of the more efficient and promising technologies owing to its low cost, simplicity in design and operation, and superior adsorption effectiveness even at low concentrations [9][10][11]. In addition to its toxic effect, the presence of 2,4-DCP in water in even trace amounts (5-10 µg/L) produces a specific odor and makes it undrinkable [1][2][3][4].…”

Recent Advances in the Removal of Organic Dyes from Aqueous Media with Conducting Polymers, Polyaniline and Polypyrrole, and Their Composites

“…This is based on the observation that any material in contact with the reaction mixture becomes coated with a thin submicrometre film [ 44 ], which is well suited for adsorption purposes. The coating of inorganic substrates is represented by the following: barium titanate [ 45 ]; cobalt ferrite [ 28 ]; cobalt sulfide [ 46 ]; copper(II) oxide [ 47 ]; fly ash [ 48 ]; iron oxyhydroxide [ 49 ]; iron sulfide [ 21 ]; magnetite [ 50 ]; manganese(IV) dioxide [ 34 , 40 ]; manganese ferrite [ 51 ]; magnesium ferrite [ 52 ]; molybdenum trioxide [ 53 ]; montmorillonite [ 54 ]; nickel oxide [ 40 ]; silica gel [ 55 ]; tin dioxide [ 56 ]; titanium dioxide [ 22 , 33 , 57 , 58 ]; zeolite [ 59 ]; zinc oxide [ 60 , 61 , 62 ]; zirconium(IV) dioxide [ 63 ].…”

Layer‐by‐layer preparation of electromagnetic NH2‐SiO2/polypyrrole/Ni nanocomposites, characterization and their electrochemical properties

“…Organic conducting polymers, principally polyaniline, polythiophene and polypyrrole (PPy), have vast application prospects in bioelectronics, [1][2][3] biomedical applications, [4][5][6][7] drug delivery, 8,9 energy storage devices, [10][11][12][13] water purification, [14][15][16][17] etc. Among these conducting polymers, PPy is attracting much attention because it offers certain advantages like high conductivity, redox property, high environment stability, biocompatibility and easy synthesis.…”