A5055648304- Advanced Photocatalysis Techniques
- Catalytic Processes in Materials Science
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Electrospun Nanofibers in Biomedical Applications
- Electron and X-Ray Spectroscopy Techniques
- Copper-based nanomaterials and applications
- Catalysts for Methane Reforming
- Advanced Electron Microscopy Techniques and Applications
- 2D Materials and Applications
- Conducting polymers and applications
- Electronic and Structural Properties of Oxides
- Electrocatalysts for Energy Conversion
- Advanced Nanomaterials in Catalysis
- Nanocluster Synthesis and Applications
- Nanomaterials for catalytic reactions
- Nanoparticles: synthesis and applications
- Electrochemical Analysis and Applications
- Graphene research and applications
- Carbon dioxide utilization in catalysis
- Transition Metal Oxide Nanomaterials
- Chalcogenide Semiconductor Thin Films
- Gas Sensing Nanomaterials and Sensors
- nanoparticles nucleation surface interactions
- Carbon Dioxide Capture Technologies
University of Georgia
2015-2025
Washington University in St. Louis
2008-2016
Oak Ridge National Laboratory
2010-2016
University of Washington
2008
Bradley University
2008
University of Rochester
2008
This paper reports a simple procedure for derivatizing the surface of anatase TiO2 nanofibers with Pt nanoparticles and then nanowires. The were prepared in form nonwoven mat by electrospinning solution containing both poly(vinyl pyrrolidone) titanium tetraisopropoxide, followed calcination air at 510 °C. fiber was immersed polyol reduction bath to coat fibers 2−5 nm size controllable density coverage. Furthermore, coated could serve as three-dimensional scaffold upon which nanowires roughly...
The polyol synthesis is a popular method of preparing metal nanostructures, yet the mechanism by which ions are reduced poorly understood. Using spectrophotometric method, we show, for first time, that heating ethylene glycol (EG) in air results its oxidation to glycolaldehyde (GA), reductant capable reducing most noble ions. dependence power on temperature EG can be explained this temperature-dependent oxidation, and factors influencing GA production have profound impact nucleation growth...
Abstract This paper provides a brief review of current research activities that focus on the fabrication ceramic nanofibers by electrospinning, as well their applications in various areas. We begin with introduction to electrospinning context nanofibers, and methods for preparing aligned and/or hollow nanofibers. then discuss approaches hierarchical structure. continue highlight some recent enabled electrospun three areas: catalysis, environmental science, energy technology, which are...
Prussian blue analogs (PBAs) are promising catalysts for green hydrogen production. However, the rational design of high-performing PBAs is challenging, which requires an in-depth understanding catalytic mechanism. Here FeMn@CoNi core-shell employed as precursors, together with Se powders, in low-temperature pyrolysis argon atmosphere. This synthesis method enables partial dissociation inner FeMn that results hollow interiors, Ni nanoparticles (NPs) exsolution to surface, and incorporation...
Liquid crystal containing composite fibres were produced via coaxial electrospinning, demonstrating that this technique can be used for producing new functional and/or to study the impact of extreme confinement on liquid phases.
This letter reports an electrocatalytic study of electrospun anatase nanofibers decorated with Pt catalysts in the form nanoparticles or nanowires. We surface through a polyol process, which 2−5 nm size were formed different densities depending on reaction time. By adding Fe(III) ions to we also obtained nanowires ∼7 diameter and up 125 length. then studied effects both coverage morphology nanostructures methanol oxidation reaction. Nanofibers submonolayer found display improved catalytic...
This article reports a simple method for functionalizing the surface of TiO2 (both anatase and rutile) ZrO2nanofibre membranes with Pt, Pd, Rh nanoparticles. The TiO2membranes were prepared in form nonwoven mats by electrospinning solution containing both poly(vinyl pyrrolidone) titanium tetraisopropoxide, followed calcination air to generate (at 510 °C) or rutile 800 °C). ZrO2membranes fabricated zirconium acetylacetonate, at 550 °C yield tetragonal phase. fibre then immersed polyol...
Plasmonic catalysis enables the use of light to accelerate molecular transformations. Its application control reaction selectivity is highly attractive but remains challenging. Here, we have found that plasmonic properties in AgPd nanoparticles allowed different pathways for tunable product formation under visible-light irradiation. By employing hydrogenation phenylacetylene as a model transformation, demonstrate irradiation can be employed steer pathway from homocoupling. Our data showed...
The development of cost-effective and efficient electrocatalysts for the hydrogen evolution reaction (HER) is critical to advancing green production technologies. Here, we present a plasmonic tungsten oxide (W18O49) material integrated with ultralow platinum (Pt) loadings (0.4, 0.8, 1.6 wt %) that delivers high HER performances under both dark visible light conditions. 0.4 % Pt–W18O49 catalyst exhibits remarkable mass activity, outperforming commercial Pt/C by factors 15 30 740 nm LED...
A facile method for the large scale transformation of ZnO nanocrystals into corresponding a zeolitic imidazolate framework was demonstrated. The methodology based on this nanoscale-facilitated can be adapted to synthesize films versatile substrates through from nanoscopic derived chemical vapor deposition (CVD) or solution growth.
This paper reports on the development of a novel thermally stable surface enhanced Raman scattering (SERS) substrate. Specifically, these substrates can withstand high temperatures in air for an extended period time without loss their enhancement capabilities. To accomplish this, we utilized bottom-up approach, where polyol reduction process was used to synthesize silver nanowires (NW) that were roughly 90 nm wide act as SERS active moiety. Subsequently, NW deposited onto glass substrate and...
We report a new class of organic–inorganic hybrid nanostructures prepared by decorating small-molecule single-crystal organic nanowires with gold, platinum, and palladium nanoparticles. demonstrate that field-effect transistors can be fabricated from the mobility current on/off ratio 0.01 cm2V−1 s−1 ∼103, respectively. To further illustrate applicability nanowires, we carried out simple hydrogenation reactions to their catalytic properties. Combined, our results open possibility utilizing...
Precious metals are widely used as catalysts in industry. It is of critical importance to keep the precious metal ions leached from at a level below one part per million (ppm) final products and recycle expensive metals. Here we demonstrate simple effective method for scavenging an aqueous solution thereby reduce their concentrations down parts billion (ppb) level. The key component filtration membrane comprised titania (TiO2 ) nanofibers whose surface has been functionalized with silane...
Abstract Tuning the anionic site of catalyst supports can impact reaction pathways by creating active sites on support or influencing metal‐support interactions when using supported metal nanoparticles. This study focuses CO 2 hydrogenation over Cu nanoparticles, revealing a 3‐fold increase in methanol yield replacing oxygen anions with hydrides perovskite (Cu/BaTiO 2.8 H 0.2 yields ~146 mg/h/gCu vs. Cu/BaTiO 3 ~50 mg/h/gCu). The contrast suggests that significant roles are played reaction....
Herein, we utilize surface enhanced Raman spectroscopy (SERS) for the in situ analyses of catalyst structure while operating at elevated temperatures various atmospheres. In order to accomplish this, robust SERS substrates were generated by depositing an ultrathin protective coating alumina on top silver nanowires (NWs) via atomic layer deposition (ALD). studies then conducted analyzing effects heating a solid acid, phosphotungstic acid (PTA), either oxygen or hydrogen environment up 400 °C....
In situ electron microscopy imaging and spectroscopy enabled us to study the evolution of quasi-1D NbS3-IV nanoribbons with respect morphology chemical structure at temperatures between room temperature 1000 °C. Scanning transmission (STEM) experiments included in secondary electron, (transmitted) bright field, high-angle annular dark-field modes while operating low kV regime. The results showed that samples transform dramatically from smooth into highly textured configurations featuring...
We describe here how the exchange bias effect in Co/CoO nanoparticles depends on size focusing and temperature treatment of precursor Co before oxidation at ambient conditions. By appealing to magnetization, microscopy, neutron, synchrotron X-ray measurements, we found that as-synthesized readily oxidize air only after 20 days. The highest field 814 Oe is observed T = 2 K. When same are centrifuged annealed 70 °C under vacuum prior oxidation, increased 2570 Oe. Annealing improves their...
Herein, we detail how the morphology of a nanomaterial affects its environmental lifetime in aquatic ecosystems. In particular, focus on cube and particle nanostructures Ag age them various mediums including synthetic hard water, pond seawater. Our results show that water cases, there was little difference rate morphological changes as determined by UV–vis spectroscopy. However, when these samples were analyzed with transmission electron microscopy, radically different mechanisms loss their...
Herein, we report on the facile synthesis of AgCl:Ag and AgCl mesocubes with edge lengths up to 500 nm. When these mesostructures were placed under an electron beam, localized heating resulted in decomposition regions respective materials leading formation highly textured silver nanostructures. Furthermore, utilized along their analogs for use surface enhanced Raman spectroscopy (SERS) applications.