access icon free Biotemplate preparation of Bi2O3 nanosheet for enhanced photodegradation of methylene blue

Bi2O3 nanosheet was synthesised using China rose petal as a biotemplate for the photodegradation of methylene blue under xenon lamp irradiation. The samples were characterised by thermogravimetric analysis–differential scanning calorimetric analysis, Fourier-transform infrared spectroscopy, nitrogen adsorption, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and ultraviolet–visible diffuse reflectance spectroscopy. The results revealed that the Bi2O3 nanosheet with pure monoclinic phase was successfully synthesised by replication of the petal template with a thickness of about 100 nm, and showed the absorption thresholds wavelength of 480 nm. Moreover, the Bi2O3 nanosheet exhibited 94.84% degradation efficiency of photodegradation of methylene blue in 180 min, which was much more active than that of the commercial α-Bi2O3 due to its high specific surface area of 45.7 m2 g−1 and wide band gap of 3.10 eV.

Inspec keywords: dyes; thermal analysis; adsorption; replica techniques; nanofabrication; energy gap; Fourier transform infrared spectra; ultraviolet spectra; bismuth compounds; scanning electron microscopy; photochemistry; photodissociation; visible spectra; nanostructured materials; differential scanning calorimetry; transmission electron microscopy; X-ray diffraction

Other keywords: photodegradation; specific surface area; thermogravimetric analysis–differential scanning calorimetric analysis; time 180.0 min; Bi2O3 nanosheet; methylene blue; Bi2O3; pure monoclinic phase; petal template; nitrogen adsorption; transmission electron microscopy; ultraviolet–visible diffuse reflectance spectroscopy; China rose petal; Fourier-transform infrared spectroscopy; scanning electron microscopy; wavelength 480.0 nm; biotemplate preparation; xenon lamp irradiation; X-ray diffraction

Subjects: Thin film growth, structure, and epitaxy; Solid surface structure; Sorption and accommodation coefficients (surface chemistry); Infrared and Raman spectra in inorganic crystals; Optical properties of other inorganic semiconductors and insulators (thin films, low-dimensional and nanoscale structures); Adsorption and desorption kinetics; evaporation and condensation; Visible and ultraviolet spectra of other nonmetals; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Photolysis and photodissociation by IR, UV and visible radiation; Other methods of nanofabrication; Microstructure

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2018.5706
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