Rajitha Beerelli; Padma Suvarna
Abstract
In this current research work, the synthesis of Copper (Cu) doped and Magnesium (Mg) co-doped of BeFiO3 (BFO), i.e BiFe1-xCuxO3 (where; X= 0.1, 0.15 and 0.2 wt.%) and Bi1-yMgyFe1-xCuxO3 (where; Y=0.05, 0.1 and 0.15 wt.%) were prepared by sol-gel method. The obtained samples were analyzed by various characterization ...
Read More
In this current research work, the synthesis of Copper (Cu) doped and Magnesium (Mg) co-doped of BeFiO3 (BFO), i.e BiFe1-xCuxO3 (where; X= 0.1, 0.15 and 0.2 wt.%) and Bi1-yMgyFe1-xCuxO3 (where; Y=0.05, 0.1 and 0.15 wt.%) were prepared by sol-gel method. The obtained samples were analyzed by various characterization techniques including X-ray diffraction (XRD), surface morphology examined by field emission scanning electron microscopy (FE-SEM) and transition electron microscopy (TEM). It was noted that Cu (0.15 wt.%) doped BFO had notable photocatalytic activity for Rhodamine (RhB) dye degradation when exposed to visible light irradiation. In addition to Cu (0.15 wt.%) by adding Mg (0.1 wt.% ) as a co-doping, exhibited higher photodegradation than the pure BFO, Cu-doped BFO (0.1and 0.2 wt.%) and Mg co-doped BFO (0.05 and 0.15 wt.%). Here we reported a new driven photocatalyst by doping of Cu and co-doping of Mg into BFO simultaneously. These played a key role in hampering the recombination of electron-hole pairs hence chance to increase dye degradation performance. These findings could be useful for developing affordable photocatalysts for wastewater purification.
Sankara Rao Miditana; Siva Rao Tirukkovalluri; Manga Raju Imandi; Bangaru Babu A; Ramesh Babu A
Abstract
TiO2-based nanomaterials are very effective for water and air purification and act as good antibacterial agents due to their unique physicochemical properties. TiO2 is a promising nanocatalyst because of its non-toxicity, chemical stability, and low cost. The wide band gap and rapid electron-hole recombination ...
Read More
TiO2-based nanomaterials are very effective for water and air purification and act as good antibacterial agents due to their unique physicochemical properties. TiO2 is a promising nanocatalyst because of its non-toxicity, chemical stability, and low cost. The wide band gap and rapid electron-hole recombination limit its performance which can be overcome by doping with metals and non-metal ions. Metal doping improves the trapping of electrons to inhibit electron-hole recombination and non-metal doping reduces the bandgap of TiO2. These doped TiO2 materials can be synthesized by different routes like the Sol-gel method, hydrothermal method, precipitation method, impregnation method, etc. Among these, the Sol-gel method is reported as the best and most accurate for the synthesis of TiO2 particles in the nano scale range. Because it allows the incorporation of dopant ions at the molecular level with homogeneity and high chemical purity. The structural, morphological, and optical properties of as-synthesized TiO2 nanocatalysts can be well characterized by XRD, SEM, EDX, FT-IR, UV Vis-DRS, TEM, BET, and PL. In this review article, we would like to discuss the advantage of the Sol-gel method over other preparative methods of TiO2 nanomaterials and experimental techniques related to their characterization.
Jacinth Mispa Kanagaraj; Regini Chelladurai; Subramaniam Perumal; Murugesan Rajamani
Abstract
A three component nanocomposite Poly(O-Toluidine) Zr(IV) based ion exchangers are synthesized by sol-gel method and characterized by Fourier transform-infrared spectra, , X-ray diffraction, scanning electron microscopy, thermo gravimetric analysis, ion exchange studies, conductivity and antimicrobial ...
Read More
A three component nanocomposite Poly(O-Toluidine) Zr(IV) based ion exchangers are synthesized by sol-gel method and characterized by Fourier transform-infrared spectra, , X-ray diffraction, scanning electron microscopy, thermo gravimetric analysis, ion exchange studies, conductivity and antimicrobial studies. The organic polymeric part of the composites provides mechanical and chemical stability whereas the inorganic part supports the ion-exchange behavior, thermal stability and also increases the electrical conductivity due to the good ion-exchange behavior of Zirconium (IV) molybdophosphate and Zirconium(IV) iodovanadate . The nano composite of POT/ Zr(IV) Zirconium(IV) iodovanadate exhibited an excellent ion exchange capacity value for Na+ is 4.84 meq g −1 and POT/Zr(IV) molybdo phosphate ion-exchanger has the value 4.60 meq/g . While compared to other nanocomposite ion-exchangers both the ion–exchangers have significant and effective ion-exchange behaviour . From the sorption studies and the distribution coefficient values , both the composite ion exchangers show maximum selectivity towards Pb2+.They can conjugate the mechanical properties of the organic polymers with intrinsic properties of the inorganic ion exchangers creating a new class of hybrid organic – inorganic materials with improvement in thermal stability and good electrical conductivity, ion – exchange capacity and also showed higher antimicrobial activity against Gram positive and Gram negative bacteria like Escherchia coli, Pseudomonas and Staphylococcus saprophitocus, which leads to their usage for environmental remediation like water purification.POT/Zr(IV) molybdophosphate and POT/Zr(IV) iodovanadate nanocomposite ion exchangers were used as promising ion exchangers and applied as electrochemically switchable ion exchanger for water treatment, especially water softening