Browsing by Author "Maheskumar, V"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    EFFECT OF ULTRASONICATION DURING AND AFTER PREPARATION OF BIVO4 BY CHEMICAL COPRECIPITATION TECHNIQUE
    (Elsevier, 2019) Deebasree, J P; Maheskumar, V; Vidhya, B; Balaji, G
    Bismuth vanadate (BiVO4) was prepared by ultrasonic assisted coprecipitation method. The photocatalytic activity of BiVO4 was tested under visible light irradiation for the degradation of MB. The properties of BiVO4 prepared by coprecipitation is compared with samples prepared using ultrasonic assisted coprecipiation and an optimal ultrasonic power output yielding better photocatalytic activity is identified. The properties like crystallinity, morphology were studied to understand its effect on photocatalytic property. The sample sonicated with 160 W during preparation yielded better catalytic efficiency (90% degradation of Methylene blue). The improved catalytic activity could be due to the inhibition of electron-holes recombination.
  • No Thumbnail Available
    Item
    INVESTIGATION ON THE IMPACT OF PH ON THE PHOTOCATALYTIC ACTIVITY OF SONOCHEMICALLY SYNTHESISED BIVO4
    (Elsevier, 2022-03-15) Deebasree, J P; Maheskumar, V; Vidhya, B
    The pH of BiVO4 sample synthesized using facile sonication method is varied. The impact of pH variation on structure, morphology, visible light photocatalytic activity of BiVO4 is discussed, an ideal pH which yields better catalytic efficiency is figured out. The crystal structure and phases of the samples were analyzed using X-ray Diffraction (XRD) which confirmed that neither extremely acidic nor extremely basic condition are desirable for monoclinic BiVO4 to be formed. The morphology has been investigated using scanning electron microscopy (SEM). The band gap determined using DRS revealed that sample with pH 7 (neutral) had lower bandgap. Better photocatalytic performance on the degradation of Methyl Blue (MB) under visible light is obtained under pH 7 which may be attributed to its morphology and bandgap.