Enhanced Photocatalytic Degradation of Methylene Blue by WO3 Nanoparticles Under NIR Light Irradiation

Abstract

Photocatalysts have been paid great attention owing to their excellent performance in the degradation of dangerous organic pollutants. Herein, a novel longitudinally grown WO3 photocatalyst was prepared by using a hydrothermal process, which had strong ultraviolet, visible light absorption, and weak near-infrared (NIR) absorption. The WO3 photocatalyst exhibited excellent performance in the rapid degradation of methylene blue (MB) in industry. The photothermal effect is mainly responsible for the rapid degradation of MB under NIR laser irradiation. Besides, different morphologies and structures affect the degradation of MB. The longitudinally grown enlarged the contact area between photocatalyst and MB, and expanded the scope of the absorption wavelength of light, enhancing the stability of photocatalytic materials. So this unique transverse longitudinal structure exhibited a potential capability for degrading organic pollutants.

In‐situ synthesis of reduced graphene oxide templated MIL‐53(Fe) nanorods for photo‐catalytic degradation of organic dyes under sunlight

“…Photodegradation of MB also observed by decrease in maximum absorption peak intensity (λ max = 664 nm) in UV‐visible spectrum (figure 6b). [ 13 ] The presence of RGO in RGO@MIL‐53(Fe) hybrid not only catalyse the degradation of MB and RhB but can also adsorb the MB and RhB molecules. This phenomenon demonstrates that presence of RGO not only provide high surface area for dye adsorption but also lower the recombination rate of e ‐ and h + in photo excited MIL‐53(Fe) to enhance the photodegradation activity.…”

“…Due to their promising qualities, they represent an effective contender for a variety of applications including medicines, administration, energy conversion, light harvesting, gas storage, and environmental clean-up. [11][12][13] MOFs can be photoexcited suitably when interacting with incident light that matches their energy in respect of ligand-to-metal charge-transmission. [14] Garcia and colleagues in their study have described a typical MOF-5 as an effective photo-catalyst for the breakdown of phenol.…”

Shedding light on the use of graphene oxide-thiosemicarbazone hybrids towards the rapid immobilisation of methylene blue and functional coumarins

“…It is likely that the observed enhancement of methylene blue (MB) adsorption occurs through the p-p aromatic stacking interactions between the aromatic ring of MB molecules and the ZnBTSC2@GO hybrid, resulting in non-covalent adsorption, in line with other studies that reported similar features when ZnO or WO 3 were used in MB degradation studies. 77,78 Recent studies highlight the unique physical and photoelectric properties of transition metal functionalised bis(thiosemicarbazones), which positioned them as novel and efficient photocatalysts for organic dyes under similar conditions. 79 A possible reason is that the valence band of these thiol-substituted metal complexes exhibits a more negative energy level relative to the O 2p orbitals, enabling smaller band gaps and therefore increased susceptibility to visible light.…”

Highly Efficient Removal of Methylene Blue Dye from Wastewater Using CaO-MnFe2O4 Nanoparticles Prepared with Teak Leaf Extract

“…Basically, a catalyst solution that is irradiated by light produces pairs of electrons (e) and holes (h+). The photocatalytic activity increases due to retained a large number of these photo-excited holes and the proportion of active surfaces [19], [20].…”