Investigation of a memory effect in a Au/(Ti–Cu)Ox-gradient thin film/TiAlV structure

• Damian Wojcieszak,
• Jarosław Domaradzki,
• Michał Mazur,
• Tomasz Kotwica and
• Danuta Kaczmarek

Beilstein J. Nanotechnol. 2022, 13, 265–273, doi:10.3762/bjnano.13.21

• also investigated to show the gradient distribution of Ti and Cu as a function of the thin film depth. X-ray photoelectron spectroscopy (XPS) studies were performed to determine the chemical state of titanium and copper on the surface of the mixed oxide thin films. A Specs XR-50 X-ray non-monochromatic

Ultrathin Ni_1−xCo_xS₂ nanoflakes as high energy density electrode materials for asymmetric supercapacitors

• Xiaoxiang Wang,
• Teng Wang,
• Rusen Zhou,
• Lijuan Fan,
• Shengli Zhang,
• Feng Yu,
• Tuquabo Tesfamichael,
• Liwei Su and
• Hongxia Wang

Beilstein J. Nanotechnol. 2019, 10, 2207–2216, doi:10.3762/bjnano.10.213

• F·g−1 at 1 A·g−1 were synthesized by Zhang and Lou [17]. Ni–Co mixed oxide nanoprisms with a capacitance of 1000 F·g−1 at 10 A·g−1 were also reported by Yu and co-workers [18]. Differently designed nanostructures will impact the electrochemical performance of nickel–cobalt oxide/sulfide materials

Photoactive nanoarchitectures based on clays incorporating TiO₂ and ZnO nanoparticles

• Eduardo Ruiz-Hitzky,
• Pilar Aranda,
• Marwa Akkari,
• Nithima Khaorapapong and
• Makoto Ogawa

Beilstein J. Nanotechnol. 2019, 10, 1140–1156, doi:10.3762/bjnano.10.114

• decrease in the bandgap values by doping with Ag, Pd and other transition metals such as Zr, W, Ce, Sn, Sb and In improve the photoactivity efficiency [140]. Alternatively, combination of TiO2 and ZnO with other metal oxides leads to mixed oxide NPs, including the TiO2–ZnO compositions, which exhibit

• contributions in the use of mixed-oxide NPs, it would be also of interest to explore new synthetic procedures for the preparation of nanoparticulated TiO2–ZnO solids. See for instance the recent and systematic studies developed by Bachvarova-Nedelcheva et al. [164], which could be used for the assembly of

A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide

• Shahreen Binti Izwan Anthonysamy,
• Syahidah Binti Afandi,
• Mehrnoush Khavarian and
• Abdul Rahman Bin Mohamed

Beilstein J. Nanotechnol. 2018, 9, 740–761, doi:10.3762/bjnano.9.68

• Brønsted acid sites in the CeO2-WO3 mixed oxide catalyst. Generally, chemical reactions that occurr in the NO adsorption system involve a redox reaction on the surface of the catalyst and adsorption of NO, NH3, and O2. The rate of a chemical reaction normally depends on the catalyst, which speeds up the

• interaction and oxide–oxide interactions that are unreachable otherwise [38]. Xiong et al. [39] prepared magnetic iron–cerium–tungsten mixed oxide pellets using a citric acid sol–gel process assisted by microwave irradiation for the SCR-NH3 of NO. They found that the dispersion of both cerium oxide and

Facile synthesis of ZnFe₂O₄ photocatalysts for decolourization of organic dyes under solar irradiation

• Arjun Behera,
• Debasmita Kandi,
• Sanjit Manohar Majhi,
• Satyabadi Martha and
• Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 436–446, doi:10.3762/bjnano.9.42

• -maximum of the diffraction peak) [27]. The XRD pattern of the ZFO mixed oxide shows peaks at 2θ values of 29.7, 35.1, 42.7, 53.7, 56.4, 62.0, and 73.4ο which correspond to (220), (311), (400), (422), (333), (440) and (533) crystal planes of ZFO crystal structure. FESEM Field-emission scanning electron

Fabrication of CeO₂–MO_x (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

• Ling Liu,
• Jingjing Shi,
• Hongxia Cao,
• Ruiyu Wang and
• Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

• -containing precursors and the control of the various factors that govern the morphology, texture and physico-chemical properties, provide a promising approach to fabricate CeO2-based mixed oxide with various nanostructures. However, compared with pure CeO2, it remains a challenge to synthesize CeO2-based

• transition-metal mixed-oxide nanostructures. Based on this synthesis method, other CeO2-based composite oxides with various nanostructures can be expected to be fabricated through the pre-formation of CeO2 or CeO2-based solid solution with different morphologies and the subsequent decoration of highly

From iron coordination compounds to metal oxide nanoparticles

• Mihail Iacob,
• Carmen Racles,
• Codrin Tugui,
• George Stiubianu,
• Adrian Bele,
• Liviu Sacarescu,
• Daniel Timpu and
• Maria Cazacu

Beilstein J. Nanotechnol. 2016, 7, 2074–2087, doi:10.3762/bjnano.7.198

• light scattering. The parameters were varied within each route to fine tune the size and shape of the formed nanoparticles. Keywords: iron coordination compounds; mixed oxide nanoparticles; morphology control; nanoparticle shape control; optimization procedure; Introduction The iron oxide-based

• mixed oxide nanoparticles, if we refer to iron/chromium oxides, for example, all methods known in the art to obtain such nanoparticles are based on the use of iron and chromium salts in a specific physical relation. In our previous studies we have demonstrated the possibility of obtaining nanoparticles

• of iron/chromium oxide from mixed metal clusters with preservation of the mass ratio of iron and chromium [22][23]. In the current study, we present various approaches for preparing iron oxide or mixed oxide nanoparticles using metal complexes as precursors with or without stabilizing agents. Some of

Nanostructured germanium deposited on heated substrates with enhanced photoelectric properties

• Ionel Stavarache,
• Valentin Adrian Maraloiu,
• Petronela Prepelita and
• Gheorghe Iordache

Beilstein J. Nanotechnol. 2016, 7, 1492–1500, doi:10.3762/bjnano.7.142

• annealing temperature increases. The shift of peaks position is widely debated in scientific literature and it is partly attributed to the decomposition of the mixed oxide of Ge and Si, (Ge,Si)O2, which helps to reduce tensile strain in the layer [30][33]. In Figure 2, the results of high resolution

Tm-doped TiO₂ and Tm₂Ti₂O₇ pyrochlore nanoparticles: enhancing the photocatalytic activity of rutile with a pyrochlore phase

• Desiré M. De los Santos,
• Javier Navas,
• Teresa Aguilar,
• Antonio Sánchez-Coronilla,
• Concha Fernández-Lorenzo,
• Rodrigo Alcántara,
• Jose Carlos Piñero,
• Ginesa Blanco and
• Joaquín Martín-Calleja

Beilstein J. Nanotechnol. 2015, 6, 605–616, doi:10.3762/bjnano.6.62

• TiO2, predominantly a rutile phase, and a pyrochlore phase corresponding to the mixed oxide Tm2Ti2O7 was obtained. In both cases, the presence of Tm3+ was confirmed by XPS and UV–vis spectroscopy. The UV–vis spectra showed new absorption bands in the visible part of the electromagnetic spectrum, which

Nanoporous composites prepared by a combination of SBA-15 with Mg–Al mixed oxides. Water vapor sorption properties

• Amaury Pérez-Verdejo,
• Alvaro Sampieri,
• Heriberto Pfeiffer,
• Mayra Ruiz-Reyes,
• Juana-Deisy Santamaría and
• Geolar Fetter

Beilstein J. Nanotechnol. 2014, 5, 1226–1234, doi:10.3762/bjnano.5.136

• basic pH, as SiO2 is not formed. Furthermore, during calcination, the nanocasting of Mg–Al species can occur on the mesoporous surface of the SBA-15 [9]. Indeed, the Mg–Al hydrotalcite becomes a magnesium–aluminum mixed oxide (Mg–Al–O) nanoparticles with thermal treatment and the average wall thickness

• the SBA-15 tubular structure (inset of Figure 3d). The morphology and distribution of Mg–Al mixed oxide nanoparticles into the SBA-15 channels cannot be observed, due the relative low scattering contrast between mixed oxides and the SBA-15 silica pore walls. Furthermore, no Mg–Al–O bulks are observed

Template-directed synthesis and characterization of microstructured ceramic Ce/ZrO₂@SiO₂ composite tubes

• Jörg J. Schneider and
• Meike Naumann

Beilstein J. Nanotechnol. 2014, 5, 1152–1159, doi:10.3762/bjnano.5.126

• together. The composition and crystallinity of this material connecting the individual silica particles contains the elements Ce and Zr and O as mixed oxide solid solution identified by XRD, Raman and high-resolution TEM and EFTEM. High-resolution microscopy techniques allowed for an elemental mapping on

• distribution of the oxides CeO2 and ZrO2 on the surface of the silica tubes. An element mapping analysis of the resulting mixed oxide tubes (Ce, Zr, and O) shows that oxygen is evenly distributed throughout the whole sample as would be expected from an all oxidic material. The majority of the cerium and

Twofold role of calcined hydrotalcites in the degradation of methyl parathion pesticide

• Alvaro Sampieri,
• Geolar Fetter,
• María Elena Villafuerte-Castrejon,
• Adriana Tejeda-Cruz and
• Pedro Bosch

Beilstein J. Nanotechnol. 2011, 2, 99–103, doi:10.3762/bjnano.2.11

• degradation; mixed oxide; organophosphate; pesticide; water pollution; Introduction MP, an organophosphate, has been extensively used as pesticide since the 1970’s instead of chlorinated hydrocarbons (e.g., DDT). This pesticide is persistent and very toxic to humans and animals [1], even at low

• effective (Figure 1b) and after 1170 minutes of the sorption process MP still remained in the waste solution as p-NP. The result using Ni–Al mixed oxide as sorbent was surprising, as it did not promote the degradation of MP (Figure 1c). Figure 2 shows the MP degradation performance to p-NP of Mg–Al, Zn–Al

• participate in the rebuilding of hydrotalcite through a memory effect mechanism. For instance, the role of Mg–Al or Zn–Al HTs is twofold, on the one hand as a catalyst (mixed oxide) accelerating the MP degradation and on the other hand as an anion sorbent through layered structure regeneration. Calcined HTs