01957nas a2200241   4500008004100000022001400041245011400055210006900169260000800238490000800246520113000254653001601384653003001400653002801430653001901458653001701477100001801494700001701512700002301529700001901552700001801571856012601589       2024                        eng d  a0254-058400aFacile microwave synthesis of Zinc Ferrite@NCDs for photocatalytic degradation of fluoroquinolone antibiotics0 aFacile microwave synthesis of Zinc FerriteNCDs for photocatalyti  cFEB0 v3143 a<p>
	Zinc ferrite (ZnFe2O4) composites have attracted growing interest in photocatalytic water purification. Herein, the hybrids of zinc ferrite and nitrogen-doped carbon dots (ZnF@x%NCDs) were synthesized via facile micro-wave synthesis. X-ray diffraction and Raman characterization confirm the formation of the spinel structure, and elemental composition has been analyzed by X-ray photoelectron spectroscopy. The photocatalytic activity of ZnF@x%NCDs was evaluated via the decomposition of ciprofloxacin and norfloxacin under visible light illumination. We noted that 20 % weight loading of NCDs led to the highest (similar to 79.2 %) ciprofloxacin (CIP) degradation. Diffuse reflectance measurements demonstrate the reduction of the band gap in composites ZnF@20%NCDs (1.91 eV) compared with bare ZnF (2.03 eV); moreover, the hybridization of zinc ferrites with NCDs results in enhanced photocurrent density and surface area. The effect of experimental parameters, including the role of photocatalyst dosage, pH value, and initial concentration of pollutants on the degradation of CIP, have also been investigated.</p>
10aCarbon dots10aCiprofloxacin degradation10aNorfloxacin degradation10aPhotocatalysis10aZinc Ferrite1 aKaushal, Neha1 aSarraf, Sonu1 aBasu, Aviru, Kumar1 aMishra, Sunita1 aSaha, Avishek  uhttps://library.ncl.res.in/content/facile-microwave-synthesis-zinc-ferritencds-photocatalytic-degradation-fluoroquinolone02077nas a2200205   4500008004100000022001400041245012400055210006900179260000800248300001400256490000700270520135800277100001701635700001801652700001801670700002001688700001801708700002001726856012501746       2024                        eng d  a0022-246100aVisible light-assisted ferro-photocatalytic application of bismuth ferrite nanoparticles synthesized at low temperature0 aVisible lightassisted ferrophotocatalytic application of bismuth  cJAN  a1513-15250 v593 a<p>
	Polycrystalline nano-sized multiferroic bismuth ferrite was prepared by facile sole-gel method using acetic acid as a chelating agent followed by calcination at 450, 500, and 600 degrees C. Transmission electron spectroscopy and X-ray diffraction patterns revealed the crystallinity in the samples, and the crystallite size increased with calcination temperature. The calcination temperature also greatly influenced the grain size of the materials, and high calcination temperature induces a decline in the total surface area per unit mass of material. The ferroelectric polarization measurement showed a decrease in remnant polarization from 0.18 to 0.09 mu C/cm2 with an increase in temperature. The remnant polarization induced delayed recombination of charge carriers upon light illumination, and the high surface area led to the highest photocatalytic activity in 450 degrees C calcined samples. The higher photocurrent density in low-temperature calcined samples supports the visible-light photodegradation studies of Congo Red (CR) dye. A maximum of 76.6% photocatalytic activity was observed in the 450 celcius calcined bismuth ferrite samples. In summary, the higher photocatalytic efficiency in the low-temperature samples is attributable to the synergistic effect of relatively higher remnant polarization and higher surface area.</p>
1 aSarraf, Sonu1 aKaushal, Neha1 aChugh, Vibhas1 aSundar, Adhiraj1 aSaha, Avishek1 aBasu, Aviru, K.  uhttps://library.ncl.res.in/content/visible-light-assisted-ferro-photocatalytic-application-bismuth-ferrite-nanoparticles02358nas a2200193   4500008004100000245013700041210007100178260000800249490000700257520161900264100002301883700002001906700002501926700001701951700002301968700002501991700001802016856013002034       2025                        eng d00aOxidase-like nanozyme activity of ultrathin copper metal–organic framework nanosheets with high specificity for catechol oxidation0 aOxidaselike nanozyme activity of ultrathin copper metal–organic   cJAN0 v173 a<p>
	<span style="color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, icomoon, sans-serif; font-size: 16px;">In nature, catechol oxidase catalyzes the oxidation of&nbsp;</span><i style="box-sizing: border-box; color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, icomoon, sans-serif; font-size: 16px;">o</i><span style="color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, icomoon, sans-serif; font-size: 16px;">-diphenol to&nbsp;</span><i style="box-sizing: border-box; color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, icomoon, sans-serif; font-size: 16px;">o</i><span style="color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, icomoon, sans-serif; font-size: 16px;">-quinone to produce a series of highly important polyphenolic natural products. Although mimicking the functionality of natural enzyme using a nanozyme was found to be beneficial, attaining a high specificity is challenging. Herein, we have explored the thickness-dependent oxidase activity and specificity of Cu-metal-organic framework (MOF) nanosheets. The unique synthetic method offers control over the thickness of the Cu-MOF nanosheets. The ultrathin (4&nbsp;nm) Cu-MOF (Cu-UMOF) nanosheets as an oxidase nanozyme exhibit high specificity for catechol oxidation without having any peroxidase activity. Interestingly, the thicker (20–30&nbsp;nm) Cu-MOF nanosheets showed poor catechol oxidase and peroxidase activity. The binuclear Cu-center, coordinative, and electronic unsaturation tuned electronic structure in Cu-UMOF, resulting in higher specificity for catechol oxidation than thicker Cu-MOF.</span></p>
1 aSingh, Ajit, Kumar1 aSharma, Deepika1 aSingh, Devesh, Kumar1 aSarraf, Sonu1 aBasu, Aviru, Kumar1 aGanesan, Vellaichamy1 aSaha, Avishek  uhttps://library.ncl.res.in/content/oxidase-nanozyme-activity-ultrathin-copper-metal%E2%80%93organic-framework-nanosheets-high