High Surface Area SnO₂–Ta₂O₅ Composite for Visible Light‐driven Photocatalytic Degradation of an Organic Dye

Abstract

SnO -Ta O nanocomposite was synthesized by a facile coprecipitation method and further calcined to obtain crystalline powder. Phase formation, morphology, bandgap and photocatalytic properties were analyzed using powder X-ray diffraction, scanning electron microscopy, UV-Vis diffused reflectance spectroscopy, BET surface area and Raman spectroscopy, respectively. Effect of calcination temperature on the crystallinity of the composite was studied. The as-prepared samples of SnO , Ta O and SnO -10wt%Ta O composite as well as the calcined composite sample were tested for photocatalytic activity for methylene blue dye degradation under visible light. Photocatalytic studies reveal that the as-prepared SnO -10wt%Ta O composite showed the best photocatalytic activity for the degradation of methylene blue (MB) by harvesting visible-light radiation efficiently. Further mineralization of methylene blue, estimated by COD analysis, is found to have degraded with an efficiency of 91.6%. The study demonstrates that heterostructure of SnO -Ta O nanocomposite could be applied in photocatalytic purification of organic pollutants.

New Magnetically Recyclable Reduced Graphene Oxide rGO/MFe2O4 (M= Ca, Mg)/Ag3PO4 Nanocomposites With Remarkably Enhanced Visible‐light Photocatalytic Activity and Stability

“…Furthermore, υ and A are light frequency and a constant, respectively. E g can be obtained from a region in the plot of ( αhυ ) 2 versus photon energy ( hυ ) .…”

“…In recent decades, reduced graphene oxide (rGO) has attracted tremendous attention in photocatalysis because of its unique properties such as large surface area, better electronic conductivity and good solution‐dispersibility. In fact, rGO is a good candidate for the preparation of different graphene‐based composite photocatalysts .…”

Enhanced Gas Sensing Performance of Nano‐Structured Ta2O5‐SnO2 Composite for Low Concentration CO Detection

“…The SnO 2 matrix when doped with additives such as X 2 O 5 where X=V, Ta, Nb, Mn, or Fe is expected to show several desirable changes like inhibition of grain growth upon calcination, modifies interface interactions and changes Debye length [38] . These changes stabilize the sensing performance of SnO 2 and improves its response and selectivity towards a particular gas [50–52] . The Ta 2 O 5 ‐SnO 2 nanocomposite tested for CO gas sensing, demonstrated remarkable improvement in the sensing performance compared to the individual semiconducting oxides.…”

“…[38] These changes stabilize the sensing performance of SnO 2 and improves its response and selectivity towards a particular gas. [50][51][52] The Ta 2 O 5 -SnO 2 nanocomposite tested for CO gas sensing, demonstrated remarkable improvement in the sensing performance compared to the individual semiconducting oxides. The material showed promising results for CO gas sensing at low operating temperature and low concentration, with high percentage response, and selectivity.…”

A Sharp Jump in Photocatalytic Activity of Elemental Sulfur for Dye Degradation in Alkaline Solution

“…Thus, these pollutants must be removed from the water (1). Several methods have been reported for the removal of dyes from wastewater such as adsorption (2)(3)(4)(5)(6)(7)(8)(9)(10)(11), membrane filtration (12,13), oxidation (14), coagulation-flocculation (15), and photocatalytic process (16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28). Each of these methods has their advantages and disadvantages.…”