Piezo-photocatalytic activity of Bi2VO5.5 for methylene blue dye degradation

Ball-milling synthesized Bi2VO5.5 for piezo-photocatalytic assessment

“…A distinct Bi 2 VO 5.5 (BiV) that was not subjected ball mill was prepared by grinding using mortar-pestle through utilizing oxide powders of V 2 O 5 and Bi 2 O 3 in the correct stoichiometric molar ratio to show the comparison in photocatalytic activity. To confirm the Bi 2 VO 5.5 phase, the powders were ground with the aid of a mortar and pestle and then they were calcined at 750 °C for 8 h. The X-ray diffraction method is utilized to establish the BiV phase formed and has been confirmed 34 . Additionally, a peculiar, not ball-milled Bi 2 VO 5.5 (NBM BiV) was synthesized by combining the oxide powders of V 2 O 5 and Bi 2 O 3 in the correct molar ratios.…”

“…In contrast to the majority of ferroelectric materials, bismuth vanadate (Bi 2 VO 5.5 , (BV)) exhibits simultaneous high ionic mobility and polar responses, two properties that are typically incompatible 30 , 31 . There are numerous applications for it, including catalysts, solid electrolytes, gas sensors, and positive electrode materials for lithium rechargeable batteries 32 – 34 . Bi 2 VO 5.5 can be produced using several techniques, including sol–gel, co-precipitation, solid-state reaction, and microwave 33 , 35 , 36 .…”

“…Using the MBM synthesis approach to synthesize powdered BiVO 4 sample, we recently reported an 81% degradation efficiency of MB dye using piezo-photocatalysis 44 . Utilizing a Bi 2 VO 5.5 powdered sample that has not been synthesized through a ball mill, we were able to degrade MB dye to attain an efficiency of 82% using piezo-photocatalysis 34 . Bi 2 VO 5.5 powder made using the MBM process has not yet been investigated for piezo-photocatalytic use.…”

“…With respect to the meta-stable elevated energy state, the reduction in particle size that occurs during milling causes defects and micro-stress. BV is therefore subjected to post-annealing treatment to eliminate the generated defects 34 , 49 . The effect of improved piezo-photocatalytic efficiency on the ball-milled BV powder is an unexplored area, and we have attempted to investigate it here.…”

Nanohybrids of Layered Titanate and Bismuth Vanadate as Visible-Light-Driven Photocatalysts for the Degradation of Dyes and Antibiotic

“…The electron transfer between NS-titanate and BiVO 4 in the NS-titanate–BiVO 4 nanohybrids is investigated with band structure estimated from the CV measurements (detailed explanation of band positions are given in Note S1 and Figure S16 in ESI), PL spectroscopy (detailed explanation is given in Note S2 and Figure S17 in ESI), and UV–vis DRS. ,,− The photocatalytic multitarget degradation mechanism is mainly based on the photoinduced charge separation and transport to the semiconductor surface upon exposure to light irradiation. , When photons having energy equal to or greater than the band gap of BiVO 4 (2.33 eV) are incident on the NS-titanate–BiVO 4 nanohybrid, electrons from the valence band (VB) of BiVO 4 are excited to its conduction band (CB), which results in the formation of electron–hole pairs. As shown in Figure , the NS-titanate shows a higher position of CB than the CB of BiVO 4 , and the VB of BiVO 4 shows a higher position than the VB of NS-titanate.…”