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Nanoconfinement-Enabled Resistance to Water Matrix Components for Selective Degradation of Micropollutants.
Angew Chem Int Ed Engl
January 2025
Sun Yat-Sen University, Environmental Science and Engineering, CHINA.
Despite recent substantial advances in water treatment, the ability to selectively degrade trace micropollutants in real waters with complex matrix components remains a grand challenge. Here we report rational crafting of graphene oxide (GO)-wrapped defective TiO2 composite catalysts that creates nanoscopic confinement over the TiO2 surface within GO, thereby enabling the selective degradation of micropollutants through effectively excluding natural organic matter (NOM) and anions from the nanoconfined catalytic sites. In contrast to unconfined counterparts, the nanoconfined composite catalysts retain high degradation efficiency when exposed to various concentrations of NOM and anions, even in real water samples.
View Article and Find Full Text PDFThe Impact of Carbon on Electronic Structure of N-Doped ZnO Films: Scanning Photoelectron Microscopy Study and DFT Calculations.
Nanomaterials (Basel)
December 2024
Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland.
A Scanning Photoelectron Microscopy (SPEM) experiment has been applied to ZnO:N films deposited by Atomic Layer Deposition (ALD) under O-rich conditions and post-growth annealed in oxygen at 800 °C. spatial resolution (130 nm) allows for probing the electronic structure of single column of growth. The samples were cleaved under ultra-high vacuum (UHV) conditions to open atomically clean cross-sectional areas for SPEM experiment.
View Article and Find Full Text PDFInsights into the electronic structure of non-steroidal anti-inflammatory drugs: soft X-ray study of fenoprofen, ketoprofen and methyl salicylate in the gas phase.
Phys Chem Chem Phys
November 2024
Elettra Sincrotrone Trieste, in Area Science Park, 34149 Basovizza, Trieste, Italy.
The valence and core electronic structure of three non-steroidal anti-inflammatory drugs (methyl salicylate, fenoprofen and ketoprofen) have been studied by photoelectron and soft X-ray absorption spectroscopy, supported by theoretical calculations of the molecular and electronic structure. The conformational landscape has been explored for sixteen low-energy conformers of fenoprofen and ketoprofen, and the energies of both compounds fall into two groups with steric similarities, separated by about 3 kJ mol. Valence band photoelectron spectra agree with previous results, and the spectra have been calculated using two approaches.
View Article and Find Full Text PDFRole of Metal-Oxide Interfaces in Methanol Decomposition: Reaction of Methanol on CeO/Ag(111) Inverse Model Catalysts.
J Phys Chem Lett
November 2024
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, People's Republic of China.
Article Synopsis
- Metal-oxide interfaces are important for catalytic processes, especially in methanol reactions on the CeO/Ag(111) catalyst surfaces studied under ultrahigh vacuum (UHV) conditions.
- Scanning tunneling microscopy and other techniques revealed that submonolayer CeO films form a hexagonal lattice with fully oxidized cerium, while higher ceria coverages lead to multilayer formations.
- Methanol interacts with these surfaces to create methoxy groups, which can decompose into formate or formaldehyde, with the submonolayer CeO exhibiting significantly lower temperatures for methoxy dehydrogenation compared to multilayer structures, highlighting the unique catalytic properties of the CeO-Ag(111) interface.
Origin of Persisting Photoresponse of One-Year Aged Two-Dimensional Lead Halide Perovskites Stored in Air under Dark Conditions.
ACS Appl Mater Interfaces
November 2024
Instituto de Ciencia de Materiales, Universidad de Valencia (ICMUV), Valencia 46071, Spain.
Two-dimensional halide perovskites are promising for advanced photonic, optoelectronic, and photovoltaic applications. However, their long-term stability is still a critical factor limiting their implementation into further commercial applications. Here, we present an environmental stability analysis of BA(MA)PbI (BA = CHN, MA = CHN) two-dimensional perovskites with the lowest quantum well thicknesses of = 1 and = 2, after 1 year of aging under ambient humidity, oxygen content, and light conditions.
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