Enhanced photocatalytic activity of silver vanadate nanobelts in concentrated sunlight delivered through optical fiber bundle coupled with solar concentrator

Abstract

To date, sunlight driven photocatalytic process for wastewater treatment is a great challenge. Herein, the photocatalytic methylene blue (MB) dye degradation activity of silver vanadate nanobelts has been enhanced using concentrated sunlight irradiation. The MB dye degradation factor in normal and concentrated sunlight irradiation is 0.57 and 0.25 respectively after 120 min of light exposure. Therefore, degradation of MB dye in concentrated sunlight occurs more than two times faster than normal sunlight. The silver vanadate nanobelts have been prepared by simple hydrothermal method. The prepared nanobelts are very thin having length ranging between 5 and 10 μm and width is in the 100-300 nm range. The optical band gap of the synthesized silver vanadate nanobelts is 1.96 eV (632.5 nm), which indicates strong absorption of visible light. This work will open new technological aspects for cost-effective sustainable wastewater treatment using solar energy.

Insight into Potassium Vanadates as Visible-Light-Driven Photocatalysts: Synthesis of V(IV)-Rich Nano/Microstructures for the Photodegradation of Methylene Blue

“… 14 − 17 A series of compounds can be mentioned here, such as Ag 3 VO 4 , 18 AgV 7 O 18 , 19 CuV 2 O 6 , 20 FeVO 4 , 21 Cd 2 V 2 O 7 , 22 InVO 4 , 23 GdVO 4 , 24 and BiVO 4 25 , 26 as the most known representatives from the vanadate family. The conducted research is mainly devoted to the nanostructured vanadates, which can appear in various forms such as nanoparticles, 27 , 28 nanobelts, 29 , 30 or nanotubes. 31 It is well known that the shape and size play a significant role, as broadly described in the literature.…”

“…Recent studies demonstrate that metal vanadates exhibit promising visible-light photocatalytic reactivity in decomposing pollutants and water splitting. − A series of compounds can be mentioned here, such as Ag 3 VO 4 , AgV 7 O 18 , CuV 2 O 6 , FeVO 4 , Cd 2 V 2 O 7 , InVO 4 , GdVO 4 , and BiVO 4 , as the most known representatives from the vanadate family. The conducted research is mainly devoted to the nanostructured vanadates, which can appear in various forms such as nanoparticles, , nanobelts, , or nanotubes . It is well known that the shape and size play a significant role, as broadly described in the literature. − The photocatalytic properties are also strongly dependent on the crystalline structure.…”

TiO2/g-C3N4 Visible-Light-Driven Photocatalyst for Methylene Blue Decomposition

“…Then, the cleavage of each methyl group on amine groups, in turn, leads to the formation of Azure B, Azure A, and thionin, with m/z of 268, 252, and 225, respectively (Figure 10(a)-10(e)). These products result from the reduction of the methyl group in the MB molecule via photocatalytic degradation [35,43]. The peak at 1.8 min (Figure 10 ).…”

Synthesis of Cu3Fe4V6O24 Nanoparticles to Produce 1,2,3-Triazoles by Azide–Alkyne Cycloaddition Reactions

“…25 As a result, this process of combination leads to the preparation of many new nanomaterials. Various compounds of vanadate have been used as heterogeneous catalysts, 26 photocatalysts, 27 solar cells, 28 photoluminescence, 29 optical fibers, 30 anode and cathode materials in lithium-ion batteries, 31,32 gas sensors, 33 and microwave applications. 34 Herein, we report the synthesis of attractive, efficient, selective, and high-yielding copper iron vanadium oxide NPs to perform the azide−alkyne cycloaddition reaction.…”

“…As a result, this process of combination leads to the preparation of many new nanomaterials. Various compounds of vanadate have been used as heterogeneous catalysts, photocatalysts, solar cells, photoluminescence, optical fibers, anode and cathode materials in lithium-ion batteries, , gas sensors, and microwave applications …”