Simultaneous electrochemical determination of uric acid and hypoxanthine at a TiO₂/graphene quantum dot-modified electrode

• Vu Ngoc Hoang,
• Dang Thi Ngoc Hoa,
• Nguyen Quang Man,
• Le Vu Truong Son,
• Le Van Thanh Son,
• Vo Thang Nguyen,
• Le Thi Hong Phong,
• Ly Hoang Diem,
• Kieu Chan Ly,
• Ho Sy Thang and
• Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 719–732, doi:10.3762/bjnano.15.60

• . HRTEM images of (a) TiO2, (b) GQDs, (c) (1:4)TiO2/GQDs, and (d) of (1:4)TiO2/GQDs with high magnification. EDX mapping of (1:4)TiO2/GQDs. (a) CV curves at different electrodes in a solution (0.05 M BR buffer, pH 4) containing CURI = CHYP = 25 µM at a potential scan rate v = 0.1 V·s−1. (b) Oxidation peak

Sodium doping in brookite TiO₂ enhances its photocatalytic activity

• Boxiang Zhuang,
• Honglong Shi,
• Honglei Zhang and
• Zeqian Zhang

Beilstein J. Nanotechnol. 2022, 13, 599–609, doi:10.3762/bjnano.13.52

• Na2Ti6O13 structure with the HOLZ ring radius of 26.86 nm−1 and the primitive-cell volume of 256 Å3 in comparison to 256.2 Å3 of the standard Na2Ti6O13 structure. Here, we use the symbol NaxTi1−xO2 (B) to indicate the as-synthesized brookite, TiO2 (B) for the conventional brookite, TiO2 (A) for the anatase

Engineered titania nanomaterials in advanced clinical applications

• Padmavati Sahare,
• Paulina Govea Alvarez,
• Juan Manual Sanchez Yanez,
• Gabriel Luna-Bárcenas,
• Samik Chakraborty,
• Sujay Paul and
• Miriam Estevez

Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15

• direct route for both bandgap engineering and photoactivity enhancement. One strategy employed was high-pressure and high-temperature hydrogenation, resulting in reduced “black TiO2” (B-TiO2−x) nps with a crystalline center and a disordered surface that absorbs light in the visible range. Chen et al

BiOCl/TiO₂/diatomite composites with enhanced visible-light photocatalytic activity for the degradation of rhodamine B

• Minlin Ao,
• Kun Liu,
• Xuekun Tang,
• Zishun Li,
• Qian Peng and
• Jing Huang

Beilstein J. Nanotechnol. 2019, 10, 1412–1422, doi:10.3762/bjnano.10.139

• the survey scan (a) and detailed Bi 4f (b), Si 2p (c), Cl 2p (d), O 1s (e) and Ti 2p (f) spectra. SEM images of BiOCl (a), TiO2 (b), TiO2/diatomite (c) and BTD (d and e). Energy-dispersive X-ray spectroscopy (EDS) mapping of BTD, including SEM image (a), O element (b), Si element (c), Cl element (d

• ), Ti element (e) and Bi element (f). TEM image (a) and high-resolution image showing the lattice fringes (b) of BTD. The photodegradation curves and corresponding kinetic plots of different samples, including various photocatalysts (a and d), BTD with different molar ratios of BiOCl to TiO2 (b and e

Tailoring the stability/aggregation of one-dimensional TiO₂(B)/titanate nanowires using surfactants

• Atiđa Selmani,
• Johannes Lützenkirchen,
• Kristina Kučanda,
• Dario Dabić,
• Engelbert Redel,
• Ida Delač Marion,
• Damir Kralj,
• Darija Domazet Jurašin and
• Maja Dutour Sikirić

Beilstein J. Nanotechnol. 2019, 10, 1024–1037, doi:10.3762/bjnano.10.103

• . Keywords: 1D nanomaterials; cationic surfactants; stability; surface complexation model; titanate nanowires; Introduction Among the extensive variety of metal oxide nanomaterials, titanium dioxide nanomaterials (TNMs) (e.g., anatase, rutile, TiO2(B) and titanate) have attracted considerable attention

• mixed phase, TiO2(B) and trititanate layered TNW structure was confirmed by powder X-ray diffraction (PXRD) as well as Fourier-transform infrared spectroscopy (FTIR) and Raman spectroscopy. The details can be found in Supporting Information File 1. High-resolution scanning electron microscopy (HR-SEM

Novel reversibly switchable wettability of superhydrophobic–superhydrophilic surfaces induced by charge injection and heating

• Xiangdong Ye,
• Junwen Hou and
• Dongbao Cai

Beilstein J. Nanotechnol. 2019, 10, 840–847, doi:10.3762/bjnano.10.84

• electrophoretic deposition. The transformation of hydrogen titanate to porous TiO2 (B) and anatase-type TiO2 completed the superhydrophilic–superhydrophobic transition but the process was unidirectional and irreversible. Jiang et al. [14] prepared cotton fabrics by a three-step method that comprised cotton

Sheet-on-belt branched TiO₂(B)/rGO powders with enhanced photocatalytic activity

• Huan Xing,
• Wei Wen and
• Jin-Ming Wu

Beilstein J. Nanotechnol. 2018, 9, 1550–1557, doi:10.3762/bjnano.9.146

• TiO2(B) is usually adopted to construct phase junctions with anatase TiO2 for applications in photocatalysis to facilitate charge separation; its intrinsic photocatalytic activity, especially when in the form of one- or three-dimensional nanostructures, has been rarely reported. In this study, a sheet

• -on-belt branched TiO2(B) powder was synthesized with the simultaneous incorporation of reduced graphene oxide (rGO). The monophase, hierarchically nanostructured TiO2(B) exhibited a reaction rate constant 1.7 times that of TiO2(B)/rGO and 2.9 times that of pristine TiO2(B) nanobelts when utilized to

• assist the photodegradation of phenol in water under UV light illumination. The enhanced photocatalytic activity can be attributed to the significantly increased surface area and enhanced charge separation. Keywords: branched nanostructure; photocatalysis; reduced graphene oxide; TiO2(B); Introduction

Room-temperature single-photon emitters in titanium dioxide optical defects

• Kelvin Chung,
• Yu H. Leung,
• Chap H. To,
• Aleksandra B. Djurišić and
• Snjezana Tomljenovic-Hanic

Beilstein J. Nanotechnol. 2018, 9, 1085–1094, doi:10.3762/bjnano.9.100

• Corporation). Thin films annealed at various temperatures, NA-TiO2, a-450 °C-TiO2, b-450 °C-TiO2 and 850 °C-TiO2, were investigated. The expected TiO2 phases were an amorphous phase in the untreated sample, anatase in a-450 °C-TiO2 and rutile in 850 °C-TiO2 [57]. The confocal scans in Figure 2a–d show

• experimental setup of the scanning confocal microscope used for investigating TiO2 defects. Representative 100 × 100 μm2 confocal scans of TiO2 morphologies. E-beam deposited thin films: (a) NA-TiO2, (b) a-450 °C-TiO2, (c) 850 °C-TiO2 and (d) b-450 °C-TiO2. (e) Single crystal rutile(001) with edges of

CdSe nanorod/TiO₂ nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity

• Fakher Laatar,
• Hatem Moussa,
• Halima Alem,
• Lavinia Balan,
• Emilien Girot,
• Ghouti Medjahdi,
• Hatem Ezzaouia and
• Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 2741–2752, doi:10.3762/bjnano.8.273

• this work stimulate the idea that CdSe/TiO2 composites may be of high potential for other applications, such as CdSe-sensitized TiO2 films for solar cells. TEM images of (a) TiO2, (b) CdSe nanorods and (c) the CdSe (2 wt %)/TiO2 composite. (d) HR-TEM image of CdSe nanorods associated to TiO2

Photocatalysis applications of some hybrid polymeric composites incorporating TiO₂ nanoparticles and their combinations with SiO₂/Fe₂O₃

• Andreea Laura Chibac,
• Tinca Buruiana,
• Violeta Melinte and
• Emil C. Buruiana

Beilstein J. Nanotechnol. 2017, 8, 272–286, doi:10.3762/bjnano.8.30

• ) TiO2, (b) TiO2/SiO2, (c) TiO2/Fe2O3 and (d) TiO2/SiO2/Fe2O3 nanopowders. FTIR spectra of TiO2 (a), TiO2/SiO2 (b) TiO2/Fe2O3 (c) and TiO2/SiO2/Fe2O3 (d). EDX spectra of S1–S4 hybrid composites recorded in cross section and mappings of titanium, silicon and iron. XRD patterns and TEM images (inset) for

Nanocrystalline TiO₂/SnO₂ heterostructures for gas sensing

• Barbara Lyson-Sypien,
• Anna Kusior,
• Mieczylaw Rekas,
• Jan Zukrowski,
• Marta Gajewska,
• Katarzyna Michalow-Mauke,
• Thomas Graule,
• Marta Radecka and
• Katarzyna Zakrzewska

Beilstein J. Nanotechnol. 2017, 8, 108–122, doi:10.3762/bjnano.8.12

• of a) SnO2 and 90 mol % SnO2/10 mol % TiO2; b) TiO2 and 90 mol % TiO2/10 mol % SnO2 nanopowders. Mössbauer transmission spectra of: a) SnO2; b) 90 mol % SnO2/10 mol % TiO2; c) 90 mol % TiO2/10 mol % SnO2 nanopowders. IS denotes the isomer shift, QS is the quadrupole splitting, whereas G represents

• with the corresponding SEM and TEM images (b, d). Step changes in hydrogen concentrations are given on the right hand scale (a, c). Dynamic changes in the electrical resistance, R, of: a) 90 mol % SnO2/10 mol % TiO2; b) 10 mol % SnO2/90 mol % TiO2 nanomaterials upon interaction with 1 and 2 ppm of H2

• ). The gas-sensor response S is defined in Equation 4. Dynamic changes in the electrical resistance, R, of: a) 90 mol % SnO2/10 mol % TiO2; b) 10 mol % SnO2/90 mol % TiO2 heterostructures upon interaction with 1100 ppm H2. τ denotes the recovery time. Temperature dependence of the electrical resistance

Temperature-dependent breakdown of hydrogen peroxide-treated ZnO and TiO₂ nanoparticle agglomerates

• Sinan Sabuncu and
• Mustafa Çulha

Beilstein J. Nanotechnol. 2015, 6, 1897–1903, doi:10.3762/bjnano.6.193

• the dispersion of MONPs in water without contamination. TEM images of pristine ZnO (a) and TiO2 (b) NPs. FTIR spectra of untreated and hydroxylated ZnO NPs. FTIR spectra of untreated and hydroxylated TiO2 NPs. TEM images of H2O2-treated ZnO NPs (a) and XRD spectra before and after H2O2 treatment (b

Transformation of hydrogen titanate nanoribbons to TiO₂ nanoribbons and the influence of the transformation strategies on the photocatalytic performance

• Melita Rutar,
• Nejc Rozman,
• Matej Pregelj,
• Carla Bittencourt,
• Romana Cerc Korošec,
• Andrijana Sever Škapin,
• Aleš Mrzel,
• Srečo D. Škapin and
• Polona Umek

Beilstein J. Nanotechnol. 2015, 6, 831–844, doi:10.3762/bjnano.6.86

• titanate 1D nanostructures such as nanotubes [9][12], nanowires [13], nanofibers or nanoribbons [12] (NR) morphologies can be obtained. Transformations from the layered titanate structure to TiO2-B and then to the anatase structure (H2Ti3O7 → TiO2-B → anatase) are considered to be topotactic reactions [14

• low calcination temperatures (ca. 400 °C) results in the formation of a metastable TiO2-B phase [8][16] which at higher temperatures transforms to anatase [17][18][19]. Transformations conducted under reflux or hydrothermal conditions in neutral and acidic environment affect the surface of the

• NRs are summarized in Table 1. Structural determination of TiO2 polymorphs Figure 1 shows the powder XRD patterns of the TiO2 nanoribbons resulting from the calcination of HTiNRs in air at 400, 580 and 650 °C. Upon heating at 400 °C the HTiNRs completely transformed to TiO2-B (TO-400, JCPDS No. 35

Palladium nanoparticles anchored to anatase TiO₂ for enhanced surface plasmon resonance-stimulated, visible-light-driven photocatalytic activity

• Kah Hon Leong,
• Hong Ye Chu,
• Shaliza Ibrahim and
• Pichiah Saravanan

Beilstein J. Nanotechnol. 2015, 6, 428–437, doi:10.3762/bjnano.6.43

• of c) is the EDX spectrum of 0.5 wt % Pd/TiO2 and d–f) HRTEM images of 0.5 wt % Pd/TiO2. X-ray diffraction patterns of a) TiO2, b) 0.5 wt % Pd/TiO2, c) 1.0 wt % Pd/TiO2 and d) 3.0 wt % Pd/TiO2. Raman spectra of a) TiO2, b) 0.5 wt % Pd/TiO2, c) 1.0 wt % Pd/TiO2 and d) 3.0 wt % Pd/TiO2. Adsorption

• –desorption isotherm of 0.5 wt % Pd/TiO2 and the inset is the pore size distribution. Core level XPS spectra of a) Ti 2p and b) Pd 3d of 0.5 wt % Pd/TiO2. UV–vis absorption spectra of a) TiO2, b) 3.0 wt % Pd/TiO2, c) 0.5 wt % Pd/TiO2 and d) 1.0 wt % Pd/TiO2. Photoluminescence spectra of a) TiO2, b) 0.5 wt

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

• mesoporous TiO2 film and (b) TEM image showing the ordered–desordered regions of the mesoporous TiO2 film. AFM images showing size evolution of CdS particles grown on mesoporous TiO2 with different number of deposition cycles (a) 5×CdS/TiO2, (b) 7×CdS/TiO2 and (c) 15×CdS/TiO2. TEM image of the for 15×CdS

Self-assembled monolayers and titanium dioxide: From surface patterning to potential applications

• Yaron Paz

Beilstein J. Nanotechnol. 2011, 2, 845–861, doi:10.3762/bjnano.2.94