Preparation of noble metal Ag-modified BiVO₄ nanosheets and a study on the degradation performance of tetracyclines

Abstract

The noble metal Ag Modified BiVO4 (Ag-BVO) composite photocatalytic was synthesized by photodeposition technology. The as-prepared photocatalyst was characterized by XRD, SEM, XPS, UV-vis DRS and electrochemistry measurement. The results...

Sunlight Selective Photodeposition of CoOx(OH)y and NiOx(OH)y on Truncated Bipyramidal BiVO4 for Highly Efficient Photocatalysis

“…For Ag/BiVO4 system, it has been reported that superoxide radicals (O2 •-) are the main species involved in the degradation of organics. 69 To get an insight in the radicals involved in the case of the original 0.1 wt% NiOx(OH)y/BiVO4 photocatalyst, propan-2-ol (IPA), 1,4-benzoquinone (BQ) and potassium iodide (KI) were used as hydroxyl radical (OH • ), superoxide radical (O2 •-) and hole (h + ) scavengers, respectively for RhB photodecomposition. Then, photochemical sacrificial water splitting experiments were carried out to determine the ability of the different photocatalysts to promote O2 evolution reaction in the presence of an electron scavenger (sodium periodate).…”

Enhanced photoelectrocatalytic degradation of diclofenac sodium using a system of Ag-BiVO4/BiOI anode and Ag-BiOI cathode

“…The presence of metallic Ag particles in Ag-BiVO 4 /BiOI significantly improved its PEC performance by promoting electron mobility, better visible light absorption and efficient separation of photogenerated electron–hole pairs through accelerated interfacial electron transfer by the formation of Schottky barrier which resulted in better percentage removal. In previous reports, researchers have also achieved enhanced degradation efficiencies of organics by incorporating Ag particles into BiVO 4 and other heterostructures 32 , 46 . The synergistic effect of light and applied potential in the PEC degradation process using the Ag-BiVO 4 /BiOI was also investigated and it was observed that both the photocatalytic degradation and electrochemical oxidation resulted in far less percentage removal of analyte (Fig.…”

“…The Ag-BiVO 4 /BiOI photoanode was obtained through photodeposition of Ag. This was done by dipping the electrodeposited BiVO 4 /BiOI in a methanolic solution (50% v/v) of 0.1 M AgNO 3 in the dark for 30 min under continuous stirring which was followed by irradiation with a 100 W Xenon lamp (equivalent of 1.3 sun) for specified duration 32 . The samples were designated 1Ag-BiVO 4 /BiOI, 2Ag-BiVO 4 /BiOI and 3Ag-BiVO 4 /BiOI which corresponds to irradiation time of 15 min, 30 min and 45 min respectively.…”

“…For instance, Wu et al . reported enhanced photocatalytic efficiency of Ag decorated BiVO 4 and it was observed that Ag widens the visible light response range of BiVO 4 and also facilitates enhanced charge separation of photogenerated electron–hole pairs which resulted in higher removal of tetracycline 32 . Similarly, in the works of Li et al .…”

Insights into the Mechanism of the Bi/BiVO4 Composites for Improved Photocatalytic Activity

“…[21]. In recent years, several synthetic materials that show heightened photocatalytic activity with noble metal acting as a cocatalyst have been manufactured, such as Au/BiVO 4 [22] and Ag/BiVO 4 [23]. However, the development is limited for the high price and shortage of noble metal.…”