Rapid degradation of zinc oxide nanoparticles by phosphate ions

• Rudolf Herrmann,
• F. Javier García-García and
• Armin Reller

Beilstein J. Nanotechnol. 2014, 5, 2007–2015, doi:10.3762/bjnano.5.209

• subsequent TEM investigation. An aliquot was dissolved in acid and analyzed for the phophorus/zinc molar ratio by ICP-OES. The results are shown in Table 1. For pure ZnO the ratio is zero, and for pure tertiary zinc phosphate 2:3 is expected. A higher value indicates the presence of secondary zinc phosphate

• mg/L (very low conversion) the ICP-OES results are considered not reliable and therefore indicated as not determinable (n.d., i.e., close to zero) in the table. The results clearly indicate that the degradation of the ZnO-NP is almost complete for all of the samples after 24 h. Some differences can

• disodium salt (10 mg) for ICP-OES analysis according to DIN EN 11885 (Bayerisches Institut für Angewandte Umweltforschung und -technik (bifa), Augsburg). The results are presented in Table 1. In addition, the ζ-potential and the hydrodynamic diameter were determined in buffer B immediately after dispersion

Nanostructured, mesoporous Au/TiO₂ model catalysts – structure, stability and catalytic properties

• Matthias Roos,
• Dominique Böcking,
• Kwabena Offeh Gyimah,
• Gabriela Kucerova,
• Joachim Bansmann,
• Johannes Biskupek,
• Ute Kaiser,
• Nicola Hüsing and
• R. Jürgen Behm

Beilstein J. Nanotechnol. 2011, 2, 593–606, doi:10.3762/bjnano.2.63

• diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption, inductively coupled plasma ionization spectroscopy (ICP–OES) and X-ray photoelectron spectroscopy (XPS). The catalytic properties were evaluated through the oxidation of CO as a test reaction, and reactivities were measured directly

• calcination in air at 350 °C for 3 h, with a ramp rate of 1 K min−1. For the N2 sorption and inductively coupled plasma ionization spectroscopy (ICP–OES) measurements, a larger quantity of the titania material was needed: The remaining coating solution was cast in petri dishes and aged analogously to the thin

• with a pass energy of 93.9 eV (detail spectra with 29.35 eV). ICP–OES measurements were performed on an Ultima 2 instrument (Horiba Jobin Yvon). Electron microscopy measurements The samples were cut into pieces (diamond wire saw) and glued together face-to-face for cross-sectional TEM measurements

Platinum nanoparticles from size adjusted functional colloidal particles generated by a seeded emulsion polymerization process

• Nicolas Vogel,
• Ulrich Ziener,
• Achim Manzke,
• Alfred Plettl,
• Paul Ziemann,
• Johannes Biskupek,
• Clemens K. Weiss and
• Katharina Landfester

Beilstein J. Nanotechnol. 2011, 2, 459–472, doi:10.3762/bjnano.2.50

• 1 mL·h−1. The solution was stirred for 24 h at 80 °C under an argon atmosphere. After completion, the resulting particles were dialyzed in order to remove the unreacted initiator and monomer. Previously, it has been shown by inductively coupled plasma optical emission spectrometry (ICP-OES) that a

Synthesis of LiNbO₃ nanoparticles in a mesoporous matrix

• Anett Grigas and
• Stefan Kaskel

Beilstein J. Nanotechnol. 2011, 2, 28–33, doi:10.3762/bjnano.2.3

• analyses to determine the content of lithium, and niobium were carried out with an ICP-OES Vista (Varian). The samples were digested in hydrofluoric acid with microwave heating at 180 °C for 20 min. The oxygen content was determined with a TCH-600 (Leco) using the carrier gas hot extraction technique. TEM