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

Abstract

The mechanochemical ball milling followed by heating at 650 °C for 5 h successfully produced the single-phase Bi2VO5.5 powder. Catalytic activity for methylene blue dye degradation was investigated. Raman spectroscopy and X-ray diffraction were used to confirm the phase formation. The sample’s charge carrier transportation behavior was ascertained using time-dependent photocurrent analysis. The piezo-photocatalysis experiment yielded a 63% degradation efficiency for the ball-milled Bi2VO5.5 sample. The pseudo-first-order kinetics of the piezo-photocatalytic dye degradation are discerned, and the significant k value of 0.00529 min−1 is achieved. The scavenger test declares the h+ radical is the predominant active species during the piezo-photocatalysis experiment. Vigna radiata seeds were used in a phytotoxicity test to evaluate the germination index. The mechanochemical activation method facilitates reactions by lowering reaction temperature and time. The effect of improved piezo-photocatalytic efficiency on the ball-milled Bi2VO5.5 powder is an unexplored area, and we have attempted to investigate it. Here, ball-milled Bi2VO5.5 powder achieved improved dye degradation performance.

Unveiling an Energy Efficient Solar-Driven Nanophotocatalyst: Z-Scheme-Based CdFe2O4@CuBi2O4 Heterostructure for MB and RhB Dye Degradation

“…A scavenging study was performed to elucidate the involvement of reactive species generated by the 20%-CDO@CBO nanocomposite during the photocatalytic process to degrade MB and evaluate the photocatalytic charge transfer mechanism. Various types of quenchers, including p -benzoquinone (BQ), methanol (MeOH), potassium iodide (KI), and ethylenediaminetetracetate acid disodium (Na 2 EDTA), were used to trap O 2 .– , OH·, e – , and h + , respectively . The degradation efficiency of the catalyst was found to be 98.48% without any scavenger during the reaction (Figure a,b).…”

“…Various types of quenchers, including p-benzoquinone (BQ), methanol (MeOH), potassium iodide (KI), and ethylenediaminetetracetate acid disodium (Na 2 EDTA), were used to trap O 2 .− , OH•, e − , and h + , respectively. 48 The degradation efficiency of the catalyst was found to be 98.48% without any scavenger during the reaction (Figure 6a,b). In the presence of scavengers, the efficiency reached 85, 92.5, 74.49, and 38.36% for KI, BQ, Na 2 EDTA, and MeOH, respectively.…”

Enhanced Piezo‐photocatalytic Performances of AgNbO3 Materials for Dye Decomposition Via Polarization Engineering

“…The phase transition of the sample led to the deteriorated piezo-catalytic, photocatalytic, and piezo-photocatalytic performances of the polarized AgNbO 3 sample synthesized at 180 °C. Relevant studies have proved that corona poling can enhance the piezoelectric response of ferroelectric/piezoelectric materials, and improve the separation of photo-induced carriers, thereby boosting the photocatalytic and piezo-photocatalytic performances [51,52] In summary, polarization engineering through corona poling is an effective method to enhance the polarization and piezoelectric responses of AgNbO 3 materials, particularly for the sample with M1 ferrielectric phase. The stronger piezoelectric response and higher polarization in the polarized AgNbO 3 material led to an increased internal electric field, thereby suppressing the recombination of the photoinduced carriers.…”