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Search for "diffuse reflectance" in Full Text gives 82 result(s) in Beilstein Journal of Nanotechnology.

Mesoporous cerium oxide nanospheres for the visible-light driven photocatalytic degradation of dyes

  • Subas K. Muduli,
  • Songling Wang,
  • Shi Chen,
  • Chin Fan Ng,
  • Cheng Hon Alfred Huan,
  • Tze Chien Sum and
  • Han Sen Soo

Beilstein J. Nanotechnol. 2014, 5, 517–523, doi:10.3762/bjnano.5.60

Graphical Abstract
  • nominal molecular formula of the material based on the XPS data is CeO1.89, comprising of around 54% Ce7O12 and 46% CeO2. The mixture of two crystalline forms is also observed in our XRD measurements and TEM results (vide infra). The UV–vis diffuse reflectance spectra (subjected to a Kubelka–Munck
  • spectrum. (c) High-resolution XPS spectrum of mesoporous cerium oxide (black circles) with the overall fit (black) and the fits to Ce4+ (blue) and Ce3+ (red). (a) UV–vis diffuse reflectance spectra of cerium oxide nanospheres (black), 7 nm CeO2 (red) nanopowder, and P25 TiO2 (blue). (b) Tauc plot for
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Published 24 Apr 2014

Dye-sensitized Pt@TiO2 core–shell nanostructures for the efficient photocatalytic generation of hydrogen

  • Jun Fang,
  • Lisha Yin,
  • Shaowen Cao,
  • Yusen Liao and
  • Can Xue

Beilstein J. Nanotechnol. 2014, 5, 360–364, doi:10.3762/bjnano.5.41

Graphical Abstract
  • particles are in a solid spherical shape and composed by nanoparticle aggregation, and the average diameter of deposited Pt nanoparticles is about 5 nm. Figure 3 shows the UV–vis diffuse reflectance spectra of the Pt@TiO2 core–shell nanostructures and the Pt/TiO2 control sample. The absorption from 250 to
  • -ray diffractometer (Cu Kα radiation) with a scanning speed of 2°/min in the 2θ range from 20 to 80°. Diffuse reflectance UV–vis spectra were acquired on a Lambda 750 UV–vis–NIR spectrophotometer (Perkin Elmer, USA). The morphology of the Pt@TiO2 nanocomposites were investigated by field emission
  • thermal conductivity detector (TCD). XRD patterns of Pt@TiO2 and Pt/TiO2 samples. TEM and SEM images of the Pt@TiO2 sample. (A) (B) TEM images of Pt@TiO2, (C) HRTEM images of Pt@TiO2, (D) SEM image of Pt@TiO2. UV–vis diffuse reflectance spectra of the Pt@TiO2 and Pt/TiO2 samples. The H2 yield from Pt@TiO2
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Full Research Paper
Published 26 Mar 2014

Study of mesoporous CdS-quantum-dot-sensitized TiO2 films by using X-ray photoelectron spectroscopy and AFM

  • Mohamed N. Ghazzal,
  • Robert Wojcieszak,
  • Gijo Raj and
  • Eric M. Gaigneaux

Beilstein J. Nanotechnol. 2014, 5, 68–76, doi:10.3762/bjnano.5.6

Graphical Abstract
  • . Similarly as described in [16], diffuse reflectance spectra of CdS/titania films were recorded by using an UV–vis spectrophotometer (Carry 5), which was equipped with an integrating sphere. The baseline was set by BaSO4 in the diffuse reflectance mode. The spectra were recorded at room temperature in the
  • formation of aggregates make the estimation of the average particle size of the CdS nanoparticles by AFM very challenging and result in overestimated values. UV–vis diffuse reflectance spectroscopy The absorption spectra recorded for various increasing deposition cycles of CdS quantum dots are shown in
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Published 20 Jan 2014

Preparation of NiS/ZnIn2S4 as a superior photocatalyst for hydrogen evolution under visible light irradiation

  • Liang Wei,
  • Yongjuan Chen,
  • Jialin Zhao and
  • Zhaohui Li

Beilstein J. Nanotechnol. 2013, 4, 949–955, doi:10.3762/bjnano.4.107

Graphical Abstract
  • NiS/ZnIn2S4 nanocoposite. No peaks in the Ni 2p region were observed in the XPS spectra of 0.5% NiS/ZnIn2S4, probably due to the low amount of NiS loaded and its embed within the ZnIn2S4 nanostructures. The UV–visible diffuse reflectance spectra of NiS/ZnIn2S4 nanocomposites are displayed in Figure 4
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Published 23 Dec 2013

Mesoporous MgTa2O6 thin films with enhanced photocatalytic activity: On the interplay between crystallinity and mesostructure

  • Jin-Ming Wu,
  • Igor Djerdj,
  • Till von Graberg and
  • Bernd M. Smarsly

Beilstein J. Nanotechnol. 2012, 3, 123–133, doi:10.3762/bjnano.3.13

Graphical Abstract
  • , for the UV–vis diffuse-reflectance spectrum). The photogenerated holes diffuse all the way to the surface where they oxidize the preadsorbed RhB molecules directly, or indirectly by forming hydroxyl radicals, which abstract H atoms from the organics on or near the semiconductor surface [26]. During
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Published 13 Feb 2012

Investigation on structural, thermal, optical and sensing properties of meta-stable hexagonal MoO3 nanocrystals of one dimensional structure

  • Angamuthuraj Chithambararaj and
  • Arumugam Chandra Bose

Beilstein J. Nanotechnol. 2011, 2, 585–592, doi:10.3762/bjnano.2.62

Graphical Abstract
  • transformation into a highly stable orthorhombic structure were confirmed by thermal studies. The optical band structure and ethanol vapor-sensing behavior were studied by means of diffuse reflectance spectroscopy (DRS) and fiber optics spectroscopy, respectively. To the best of our knowledge, this paper reports
  • band gap is evaluated using K–M function as follows [27]: where F(R∞) is the K–M function or re-emission function, R∞ is the diffuse reflectance of an infinitely thick sample, K(λ) is the absorption coefficient, s(λ) is the scattering coefficient, hν is the photon energy and Eg is the band gap energy
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Published 14 Sep 2011

Novel acridone-modified MCM-41 type silica: Synthesis, characterization and fluorescence tuning

  • Maximilian Hemgesberg,
  • Gunder Dörr,
  • Yvonne Schmitt,
  • Andreas Seifert,
  • Zhou Zhou,
  • Robin Klupp Taylor,
  • Sarah Bay,
  • Stefan Ernst,
  • Markus Gerhards,
  • Thomas J. J. Müller and
  • Werner R. Thiel

Beilstein J. Nanotechnol. 2011, 2, 284–292, doi:10.3762/bjnano.2.33

Graphical Abstract
  • samples were calibrated with a diffuse BaSO4 referenced auto zero and were measured using a Biconical (Praying Mantis) Diffuse Reflectance Accessory in reflecting absorption mode. Solid state fluorescence data was recorded on a Perkin-Elmer LS55 with a step width of 0.5 nm. The thin film powder samples
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Published 09 Jun 2011
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