Search results
Search for "titanate" in Full Text gives 36 result(s) in Beilstein Journal of Nanotechnology.
Effect of SiNx diffusion barrier thickness on the structural properties and photocatalytic activity of TiO2 films obtained by sol–gel dip coating and reactive magnetron sputtering
Beilstein J. Nanotechnol. 2015, 6, 2039–2045, doi:10.3762/bjnano.6.207
- + ions increase the temperature of anatase formation and increase the particle size [4][7], (b) Na+ ions inhibit the formation of the anatase phase and act as a recombination center of photo-generated electron–hole pairs [3], and (c) Na+ ions induce the formation of brookite or sodium titanate (Na2OxTiO2
Atomic scale interface design and characterisation
Beilstein J. Nanotechnol. 2015, 6, 1708–1711, doi:10.3762/bjnano.6.174
- chemical properties and processes occurring at the surface on a nanoscale are of crucial concern. Nanostructured materials show a great application potential in the areas of nanoelectronics, catalysis, and light harvesting/energy storage, an excellent example being the capability of titanate nanoribbons to
Current–voltage characteristics of manganite–titanite perovskite junctions
Beilstein J. Nanotechnol. 2015, 6, 1467–1484, doi:10.3762/bjnano.6.152
- with polaronic charge carriers. In particular, we studied manganite–titanate p–n heterojunctions made of n-doped SrTi1−yNbyO3, y = 0.002 and p-doped Pr1−xCaxMnO3, x = 0.34 having a strongly correlated electron system. The diffusion length of the polaron carriers was analyzed by electron beam-induced
- –voltage characteristics of the analyzed manganite–titanate junction are summarized in Figure 4, where J is the current density. For all measurements at different temperatures, the rectifying characteristic of the junction can be recognized. By decreasing the temperature, a plateau evolves for the reverse
- current. This can be discussed according to Figure 10, where the expected simplified band diagram of the manganite–titanate junction is shown for electro-chemical equilibrium and with applied voltage in both forward and reverse directions. We disregard here all changes of the electronic structure of the
High photocatalytic activity of V-doped SrTiO3 porous nanofibers produced from a combined electrospinning and thermal diffusion process
Beilstein J. Nanotechnol. 2015, 6, 1281–1286, doi:10.3762/bjnano.6.132
- metal ions [8][9][10][11], such as Ti4+, Zr4+, Ta5+, Nb5+ and V5+, as well as the development of new photocatalysts. Strontium titanate (SrTiO3), an important multifunctional semiconductor, has been applied in photocatalysis technology for water splitting and organic contaminant degradation [12][13
Transformation of hydrogen titanate nanoribbons to TiO2 nanoribbons and the influence of the transformation strategies on the photocatalytic performance
Beilstein J. Nanotechnol. 2015, 6, 831–844, doi:10.3762/bjnano.6.86
- , SI-1000 Ljubljana, Slovenia 10.3762/bjnano.6.86 Abstract The influence of the reaction conditions during the transformation of hydrogen titanate nanoribbons to TiO2 nanoribbons on the phase composition, the morphology, the appearance of the nanoribbon surfaces and their optical properties was
- in air. Keywords: doping; nanoribbon; photocatalytic performance; titanate; titanium dioxide (TiO2); transformation; Introduction Titanium dioxide (TiO2) is a technologically important material due to its remarkable combination of properties, its chemical stability and nontoxicity [1][2]. In
- . Since the first report on the synthesis of titanate nanotubes by Kasuga et al. [9], this pathway has become more interesting mostly due to its high synthesis yield and the possibility of using sodium titanate nanotubes as a precursor for the preparation of TiO2 nanotubes. Titanates, with the formula
Overview of nanoscale NEXAFS performed with soft X-ray microscopes
Beilstein J. Nanotechnol. 2015, 6, 595–604, doi:10.3762/bjnano.6.61
- the nanoscale range and allows time resolved measurements [57]. With the new optical concept of the HZB-TXM it was demonstrated for the first time that NEXAFS by studying sodium titanate nanostructures at the Ti-L-absorption edge in the soft X-ray region can be performed with a full field microscope
- NEXAFS-TXM. As a result of this investigation it was found that neither Cd nor S diffuse into the CuO phase after the deposition of CdS on the CuO nanowires [60][61]. The possibility to study the oxidation state of Mn dopants in titanate nanostructures was reported in [62]. Additionally, using the
Functionalized nanostructures for enhanced photocatalytic performance under solar light
Beilstein J. Nanotechnol. 2014, 5, 994–1004, doi:10.3762/bjnano.5.113
- significantly affect the photocatalytic process. For example, Jang and co-workers reported that bulky CdS decorated with TiO2 nanoparticles was much more active than bulky TiO2 decorated with CdS nanoparticles [32]. We have prepared CdS/titanate nanotubes (CdS/TNTs) photocatalysts with a unique morphology by a
Nanostructure sensitization of transition metal oxides for visible-light photocatalysis
Beilstein J. Nanotechnol. 2014, 5, 696–710, doi:10.3762/bjnano.5.82
- tubular structure of TiO2 nanotubes and 2D layered titanate nanosheets were also used for the photosensitization. The CdS quantum dots photosensitized TiO2 nanotubes by covalent bonding [21] or a sonication-assisted sequential chemical bath deposition approach [31] led to a more efficient separation of
- . reported a layer-by-layer self-assembly between positively charged CdS quantum dots and negatively charged exfoliated titanate nanosheets to design noble-metal free photocatalysts. The resultant composites exhibited a much higher photocatalytic H2 production activity than pristine titanate and CdS quantum
Towards atomic resolution in sodium titanate nanotubes using near-edge X-ray-absorption fine-structure spectromicroscopy combined with multichannel multiple-scattering calculations
Beilstein J. Nanotechnol. 2012, 3, 789–797, doi:10.3762/bjnano.3.88
- theoretical modelling. Taking the example of isolated bundles of hydrothermally prepared sodium titanate nanotubes ((Na,H)TiNTs) we are able to unravel the complex nanoscale structure from the NEXAFS–TXM data using multichannel multiple-scattering calculations, to the extent of being able to associate
- resolution in similar techniques with lower spectral resolution [9][10]. We investigate here the electronic structure of sodium titanate nanotubes ((Na,H)TiNTs) by means of near-edge X-ray-absorption fine-structure spectroscopy (NEXAFS) coupled with first-principles NEXAFS calculations (density functional
- that the structure of the layered titanate H2TinO2n+1 better describes the (Na,H)TiNTs [17][18]. Potential applications in lithium-ion batteries, catalyst supports, photocatalysts, and dye-synthesized solar cells have effectively resulted in an increasing interest in titanate nanostuctures [19][20][21
Probing three-dimensional surface force fields with atomic resolution: Measurement strategies, limitations, and artifact reduction
Beilstein J. Nanotechnol. 2012, 3, 637–650, doi:10.3762/bjnano.3.73
- of a piezoelectric scan tube employed as a precise positioning tool in scanning probe microscopes [38][39]. The tube itself (blue) is manufactured out of a piezoelectric material (usually lead zirconate titanate, PZT). Voltages applied to one of the four external metallic electrodes (grey; denoted
Preparation and characterization of supported magnetic nanoparticles prepared by reverse micelles
Beilstein J. Nanotechnol. 2010, 1, 24–47, doi:10.3762/bjnano.1.5
- , in case of Pt, (111)-textured thin films (50 nm) were used which were obtained by pulsed laser deposition (PLD) at ambient temperature on MgO(001) or (100)-oriented films (80 nm) epitaxially grown by PLD on (001) strontium titanate (SrTiO3) crystals at 400 °C. In all cases, no special pre-treatment
Other Beilstein-Institut Open Science Activities
