No abstract

Noble metal, semiconductor, or metal-free nanomaterials have shown promising applicability as potential photocatalyst materials. A one-step process has been established for the synthesis of layered molybdenum (meta)phosphate [MoO 2 (PO 3 ) 2 ] using a solvothermal method. The nanopowders were characterized by X-ray diffraction (XRD), UV–visible spectroscopy (UV–vis), scanning electron microscopy (SEM), infrared spectroscopy (IR), X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy (PL), surface area analysis (Brunauer–Emmett–Teller (BET)), electron spin resonance (ESR), and high-resolution transmission electron microscopy (HRTEM). Through this study, we demonstrate the use of MoO 2 (PO 3 ) 2 as a photocatalyst for wastewater treatment. The photoreduction of toxic Cr 6+ to Cr 3+ by layered molybdenum (meta)phosphate is investigated using formic acid as a scavenger. This catalyst has also been used for photodegrading organic dyes like methylene blue. MoO 2 (PO 3 ) 2 has been shown to complete photoreduction of toxic Cr 6+ to Cr 3+ in 6 min and achieved 78% degradation efficiency for methylene blue in 36 min. The reactive species trapping experiments revealed that the key active species like O 2 •– , • OH, and h + can exist and play an important role in methylene blue photodegradation.

The reaction of CdI2with thiosemicarbazone-based ligands such as (benztsczH)2 and (benzoptsczH)2resulted inCdI2(benztsczH)2 and CdI2(benzoptsczH)2 complexes where benztsczH and benzoptsczH are benzaldehyde and benzophenone thiosemicarbazone respectively.The above complexes have been prepared and characterized by elemental analysis, infrared and nuclear magnetic resonance (1H and 13C{1H}) spectroscopic techniques. These complexes have been studied for antibacterial activities usingEscherichia coli (gram-negative) and Staphylococcusaureus(gram-positive).The minimum inhibitory concentration response of both the complexeswas found to be 400ppm against the strains.