Tin dioxide nanoclusters are very effective as catalysts for various reactions including CO₂ conversion and Friedel-Crafts acylation for pharmaceuticals. The nanoarchitectonics of SnO₂ could be controlled by different synthetic strategies. In the current article, we have presented synthesis of SnO₂ nanoclusters and their applications in catalysis. We have also reviewed computational studies on SnO₂ nanoclusters for using them in nanoarchitectonics and catalytic conversion of CO₂ to useful chemicals. Optimized structures of various cluster sizes are presented. The present and future perspectives of SnO₂ catalysts in biomass conversions are also given.
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http://dx.doi.org/10.1166/jnn.2020.18539 | DOI Listing |
Int J Mol Sci
January 2025
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
It is challenging to handle heavy-metal-rich plants that grow in contaminated soil. The role of heavy metals in biomass on the physicochemical structure and electrochemical properties of their derived carbon has not been considered in previous research. In this study, Cu-ion hybrid nanoporous carbon (CHNC) is prepared from Cu content-contaminated biomass through subcritical hydrocharization (HTC) coupling pyrolytic activation processes.
View Article and Find Full Text PDFNature
January 2025
Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada.
In a dilute two-dimensional electron gas, Coulomb interactions can stabilize the formation of a Wigner crystal. Although Wigner crystals are topologically trivial, it has been predicted that electrons in a partially filled band can break continuous translational symmetry and time-reversal symmetry spontaneously, resulting in a type of topological electron crystal known as an anomalous Hall crystal. Here we report signatures of a generalized version of the anomalous Hall crystal in twisted bilayer-trilayer graphene, whose formation is driven by the moiré potential.
View Article and Find Full Text PDFNature
January 2025
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA.
Electrons in topological flat bands can form new topological states driven by correlation effects. The pentalayer rhombohedral graphene/hexagonal boron nitride (hBN) moiré superlattice was shown to host fractional quantum anomalous Hall effect (FQAHE) at approximately 400 mK (ref. ), triggering discussions around the underlying mechanism and role of moiré effects.
View Article and Find Full Text PDFNat Mater
January 2025
Department of Physics, Harvard University, Cambridge, MA, USA.
Atomically thin van der Waals (vdW) films provide a material platform for the epitaxial growth of quantum heterostructures. However, unlike the remote epitaxial growth of three-dimensional bulk crystals, the growth of two-dimensional material heterostructures across atomic layers has been limited due to the weak vdW interaction. Here we report the double-sided epitaxy of vdW layered materials through atomic membranes.
View Article and Find Full Text PDFNature
January 2025
Department of Physics, Columbia University, New York, NY, USA.
The discovery of superconductivity in twisted bilayer and trilayer graphene has generated tremendous interest. The key feature of these systems is an interplay between interlayer coupling and a moiré superlattice that gives rise to low-energy flat bands with strong correlations. Flat bands can also be induced by moiré patterns in lattice-mismatched and/or twisted heterostructures of other two-dimensional materials, such as transition metal dichalcogenides (TMDs).
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