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The present manuscript portrays environmental benign, cost‐effective and energy efficient green route way to synthesize Mg−Zn ferrite nanoparticles [Mg0.05Zn0.05Fe2O4 NPs] using Ocimum Basilicum leaf extract [OBLE]. X‐ray diffraction (XRD) analysis revealed that Ocimum Basilicum leaf extract mediated Mg−Zn ferrite nanoparticles [OBLE@Mg−Zn NPs] exhibit face centred cubic crystallinity with space group Fd3‾m ${{\rm F}{\rm d}\bar{3}{\rm m}}$ as confirmed by Rietveld refinement studies. Microstructural analysis illustrated uniform surface morphology with well interlinked grain with an average grain size of 35.6±0.12 nm. FTIR spectra showed existence of hydroxyl −OH group at 3403 cm−1 and C=C vibration at 2345 cm−1. Magnetic hysteresis loop (M−H loop) confirmed the superparamagnetic behaviour of OBLE@Mg−Zn NPs. Cytotoxic activity of OBLE@Mg−Zn NPs was carried out against breast cancer cell line MDA‐MB‐231. Dose dependent cell viability of cancerous cells depicted cytotoxic potential of OBLE@Mg−Zn NPs. [ABSTRACT FROM AUTHOR]

Present study portrays, physicochemical investigations of pristine and Pd2+ modified ZnO nanoflowers (NFs) compositional series [Zn(1−x)PdxO NFs; where x = 0, 0.01, 0.03, 0.05, and 0.07] synthesized via sol–gel reaction route. X-ray diffractogram of all the compositions displayed hexagonal wurtzite type crystallinity with P63mc space group without any traces of impurities as confirmed from Rietveld refinement technique. It was found that the average crystallite size increased from 32 to 74 nm with Pd2+ intrusion in the crystal lattice framework of ZnO. FESEM micrographs depicted that the surface morphology of pure and Pd modified compositions exhibit flower-shaped surface morphology. The optical properties of as-synthesized NFs were carried out using UV–vis spectroscopy and it was observed that optical energy bandgap (Eg) decreased minutely by Pd2+ doping. To determine the gas sensing behavior of synthesized NFs, the prepared gel during material fabrication was used to cast thin films. The thin films were calcined at 600 °C for LPG gas sensing activity and it was observed that the transient curve shows a high response for the composition x = 0.03 for the concentration of 2000 ppm. The present result illustrates that synthesized NFs showed potential candidature for LPG gas sensing. The present study reveals synthesized NFs showed potential candidature for LPG gas sensing 80 °C with a gas sensitivity of 315%. [ABSTRACT FROM AUTHOR]