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P.R. Sivaranjani,Asad Syed,Abdallah M. Elgorban,Ali H. Bahkali,R. Balakrishnaraja,Rajender S. Varma,S. Sudheer Khan 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-
The current study offers the design of a novel photocatalyst for the effective removal of pharmaceuticalswherein the heterojunction was constructed with the objective of capturing maximum solar spectrumand to ensure effective separation of photogenerated charge carriers. The nano-heterojunction was fabricatedthrough ultrasonication-assisted co-precipitation method by the hierarchical deposition of a-Fe2O3 and b-La2S3 on cubic CoCr2O4 spinel. The fabricated nanomaterials were extensively characterizedby using XRD, Raman, FTIR, XPS, SEM, TEM, EDAX, PL, EIS, BET, and DRS. The photoluminescence and EISanalysis revealed the mitigated charge carrier recombination in CoCr2O4/a-Fe2O3/b-La2S3 (CFL) thatresulted in superior photodegradation of doxycycline (DOX) (92.83 %) under visible light irradiation. Mineralization percentage of 92.5 % was affirmed by TOC analysis. Further, the influence of pH, ions, concentrationof DOX and CFL dosage on the photodegradation process was studied. The active participationof the reactive species involved in the reaction were identified by scavenging assay and ESR. Finally, apossible photocatalytic mechanism of CFL for the degradation of DOX with underlying pathway is proposedwith the help of GC–MS/MS analysis. The study highlights the great promise of CFL photocatalystas well as the potential of n-n-p heterojunction for appliances in the photodegradation of organicpollutants.
Synthesis and Characterization of In2O3Nanoparticles
A. Ayeshamariam,M. Kashif,S. Muthu Raja,S. Sivaranjani,C. SANJEEVIRAJA,M. Bououdina 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.2
Metal-oxide nanostructures have elicited increasing interest in both fundamental and appliedsciences. Among metal oxide nanostructures, In2O3 has the potential for use asa semiconductormaterial. This article provides details on studies carried out thus far for the synthesis and thecharacterization of In2O3 nanostructures. In this research, various techniques were investigatedfor the fabrication of diverse and fascinating spherical shaped In2O3 nanostructures. Brunauer-Emmett-Teller (BET) analyses of the In2O3 nanostructures through detailed refinements of thestructure of the In2O3 nanoparticles by using the Rietveld method, followed by microstructuralanalyses using scanning electron microscopy/ transmission electron microscopy (SEM/TEM) anda chemical composition analysis are presented and discussed. Decreasing crystallinity with animprovement in specific surface area was observed from the structural characterization. The energydispersive analysisresults showed that the as-prepared In2O3 powder sample was stoichiometric,containing almost equal proportions of indium and oxygen. The microstructural analysis (TEM andSEM) demonstrated precise control over the diameters of the nanoparticles, which is an importantadvantage of the solution combustion approach.