Magnéli-phase TiO, known for its high electrical conductivity and corrosion resistance, is typically prepared by hydrogen reduction at high temperatures (∼1000 °C), leading to large particles. Nanosized TiO have been explored for application toward high specific surface area electrode materials and electrocatalyst supports; nonetheless, the particle size of TiO is still insufficient for utilization as a support. In this study, we have pursued a novel synthetic approach for nanosized TiO platelets with a length of 10-80 nm and thickness of 3-10 nm even under high-temperature conditions. We herein describe the use of SiO beads as a core to obtain a SiO core coated with multilayers of TiO nanosheets exfoliated from layered HTiO which is subsequently subjected to high-temperature reduction to prepare a SiO-core@TiO-shell structure. The pair distribution function technique has proven that the shell is transformed to single-phase TiO. The electrical double layer capacitance of SiO-core@TiO-shell was much larger than that of conventionally synthesized TiO particles with a micrometer size. The results show the beneficial effects of the SiO-core@TiO-shell structure, and it is the first example of the synthesis for conductive TiO with a high specific surface area even under conditions of high-temperature synthesis.
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http://dx.doi.org/10.1021/acs.inorgchem.9b00707 | DOI Listing |
Environ Technol
December 2024
College of Resources and Environmental Engineering, Guizhou University, Guiyang, People's Republic of China.
Increasing antimony (Sb) pollution has become a global concern, but there is still a lack of economically efficient adsorbents for its remediation. In this study, a novel remediation material was developed by precipitating TiO onto waste herb-residue biochar (named TBC). The effectiveness and adsorption mechanisms of the material for Sb(III) removal were investigated through adsorption experiments, and the enhancement pathway of traditional herb decoction on the effectiveness of modified biochar was analyzed.
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December 2024
School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Nanjing, China.
Ferroelectric films are highly sought-after in micro-electro-mechanical systems, particularly with the trend towards miniaturization. However, their tendency to depolarize and degradation in piezoelectric properties when exposed to packaging procedures at temperatures exceeding 260 °C remains a significant challenge. Here, we reveal the prerequisites for self-poling and leverage these insights to achieve unprecedented macroscopic performance through a two-step approach involving texture construction and hierarchical heterogeneity engineering.
View Article and Find Full Text PDFTalanta
December 2024
Université de Lorraine, CNRS, LIEC, F-54000, Nancy, France.
There is a growing interest in the development of methods for the detection of nanoparticle (NP) toxicity to living organisms based on the analysis of relevant multidimensional data sets. In particular the detection of preliminary signs of NPs toxicity effects would benefit from the selection of data featuring NPs-induced alterations of biological barriers. Accordingly, we present an original Topological Data Analysis (TDA) of the nanomechanical properties of Escherichia coli cell surface, evaluated by multiparametric Atomic Force Microscopy (AFM) after exposure of the cells to increasing concentrations of titanium dioxide nanoparticles (TiONPs).
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December 2024
Department of Chemistry, Shanghai Stomatological Hospital & School of Stomatology, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China.
An efficient regiospecific co-assembly (RSCA) strategy is developed for general synthesis of mesoporous metal oxides with pore walls precisely decorated by highly dispersed noble metal nanocrystals with customized parameters (diameter and composition). It features the rational utilization of the specific interactions between hydrophilic molecular precursors, hydrophobic noble metal nanocrystals, and amphiphilic block copolymers, to achieve regiospecific co-assembly as confirmed by molecular dynamics simulations. Through this RSCA strategy, we achieved a controllable synthesis of a variety of functional mesoporous metal oxide composites (e.
View Article and Find Full Text PDFACS Cent Sci
December 2024
Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States.
Added electrons and holes in semiconducting (nano)materials typically occupy "trap states," which often determine their photophysical properties and chemical reactivity. However, trap states are usually ill-defined, with few insights into their stoichiometry or structure. Our laboratory previously reported that aqueous colloidal TiO nanoparticles prepared from TiCl + HO have two classes of electron trap states, termed and .
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