A5073453850- Clay minerals and soil interactions
- Crystal Structures and Properties
- Radioactive element chemistry and processing
- Geological and Geochemical Analysis
- Layered Double Hydroxides Synthesis and Applications
- Mineralogy and Gemology Studies
- Advanced Photocatalysis Techniques
- Geochemistry and Geologic Mapping
- Iron oxide chemistry and applications
- Metal Extraction and Bioleaching
- Nuclear materials and radiation effects
- TiO2 Photocatalysis and Solar Cells
- X-ray Diffraction in Crystallography
- Catalytic Processes in Materials Science
- Magnesium Oxide Properties and Applications
- Mesoporous Materials and Catalysis
- Advanced oxidation water treatment
- Chemical Synthesis and Characterization
- Heavy metals in environment
- Nuclear Materials and Properties
- Mineral Processing and Grinding
- Thermal and Kinetic Analysis
- Inorganic Chemistry and Materials
- Arsenic contamination and mitigation
- Cultural Heritage Materials Analysis
Queensland University of Technology
2015-2024
NanoScale Corporation (United States)
2024
Nanosc (Sweden)
2024
Brisbane School of Theology
2017-2021
National Museum
2004-2020
Inner Mongolia University
2012
Zentrum für Psychiatrie Emmendingen
2009
National Synchrotron Radiation Research Center
2008
Universidad de Salamanca
2006
Nankai University
2004-2006
Cobalt hydroxide, cobalt oxyhydroxide, and oxide nanomaterials were synthesized through simple soft chemistry. The hydroxide displays hexagonal morphology with clear edges 20 nm long. This nanosize is retained to Co3O4 a topotactical relationship. oxyhydroxide oxidation low-temperature calcination from the as-prepared hydroxide. Characterization of these cobalt-based was fully developed, including X-ray diffraction, transmission electron microscopy combined selected area scanning microscopy,...
Abstract Both Raman and infrared spectroscopy have been used to characterise the three phase‐related minerals—dreyerite (tetragonal BiVO 4 ), pucherite (orthorhombic ) clinobisvanite (monoclinic )—and a comparison of spectra is made with that minerals namibite (Cu(BiO 2 )VO (OH)), schumacherite (Bi 3 O(OH)(VO pottsite (PbBiH(VO ·2H O). Pucherite, are characterised by VO stretching vibrations at 872, 824 846 cm −1 . The spectrum dreyerite shows complexity in 750 950 region two intense bands...
Niobium pentoxide reacts actively with concentrate NaOH solution under hydrothermal conditions at as low 120 °C. The reaction ruptures the corner-sharing of NbO7 decahedra and NbO6 octahedra in reactant Nb2O5, yielding various niobates, structure composition niobates depend on temperature time. morphological evolution solid products 180 °C is monitored via SEM: fine Nb2O5 powder aggregates first to irregular bars, then niobate fibers an aspect ratio hundreds form. are microporous molecular...
Abstract Azurite [Cu 2+ 3 (CO ) 2 (OH) ] and malachite )(OH) are both monoclinic hydroxy carbonates of copper. The Raman spectra these two minerals were collected at 298 77 K together with the single crystal azurite K. contain modes three separate vibrational groups: OH, CO Cu O. Accordingly, for bands 3453 3427 cm −1 have been assigned as O H stretching mode bending found 1035 952 . Malachite displays hydroxyl 3474 3404 which shift to 3470 3400 while out‐of‐plane 1045 875 For carbonate...
This article provides an overview of the research on green solvent alternatives for perovskite technology, with a fundamental discussion and analysis relationship between solvents, molecular ligands, material properties.
Production of 2,5-furandicarboxylic acid (FDCA, a platform chemical for the industry in future) by selective aerobic oxidation 5-hydroxymethyl-furfural is crucial component to enable FDCA production from sugars. The challenge achieve high yield at low temperatures. Here, we report catalyst composed alloyed nanoparticles (containing 1.5 wt % Ag and Pd) supported on CeO2 nanofibers, which achieved an excellent (93%) 20 °C. Interesting observations include deterioration higher reaction...
Abstract The molecular structure of the three vivianite-structure, compositionally related phosphate minerals vivianite, baricite and bobierrite formula M 3 2+ (PO 4 ) 2 .8H O where is Fe or Mg, has been assessed using a combination Raman infrared (IR) spectroscopy. spectra hydroxyl-stretching region are complex with overlapping broad bands. Hydroxyl stretching vibrations identified at 3460, 3281, 3104 3012 cm −1 for vivianite. high wavenumber band attributed to presence FeOH groups. This...
Abstract Raman spectra of the basic copper chloride minerals atacamite and paratacamite were obtained at 298 77 K using a microprobe in combination with thermal stage. Four distinct regions involved hydroxyl stretching, deformation, CuO stretching CuCl bending identified. The implication from study is that spectroscopy can be useful tool for identifying corrosion products copper, brass bronze objects archaeological or antiquarian significance. In addition, technique may aid restoration...
Abstract The basic copper sulphates are of interest because their appearance in many environmental situations such as pipe corrosion, restoration brass and bronze objects, leaching from waste mineral dumps the frescoes. Raman spectra sulphate minerals antlerite, brochantite, posnjakite langite reported using a diode laser operating at an excitation wavelength 785 nm. In line with crystal structures, each has its own characteristic spectrum, which allows identification. Except for multiple...
Micro- to nano-sized GaOOH nanorods and particles were prepared under varying hydrothermal conditions without any surfactant additive using gallium nitrate sodium hydroxide as starting materials. The combination of X-ray diffraction (XRD), transmission electron microscopy (TEM), small area (SAED), energy-dispersive analysis (EDX), thermogravimetric (TG), FT-IR was employed characterize the resulting oxide nanorods. Detailed results possible growth mechanism are presented.
Abstract Metal nanoparticles (NPs) have emerged as a kind of new photocatalyst to drive various chemical reactions by visible‐light irradiation. A distinct advantage metal NP photocatalysts is that their light absorption not limited certain wavelength but instead they are able utilize broad range wavelengths, constituting large fraction the solar spectrum. NPs like gold, silver, and copper can strongly absorb visible due localized surface plasmon resonance (LSPR) effect. Recent developments...
Catalytic ammoxidation of alcohols into nitriles is an essential reaction in organic synthesis. While highly desirable, conducting the synthesis at room temperature challenging, using NH3 as nitrogen source, O2 oxidant, and a catalyst without noble metals. Herein, we report robust photocatalysts consisting Fe(III)-modified titanium dioxide (Fe/TiO2) for reactions utilizing oxygen atmospheric pressure, NH4Br additive. To best our knowledge, this first example catalytic over photocatalyst such...
Abstract Raman spectra of cornetite, libethenite, pseudomalachite, reichenbachite and ludjibaite were obtained at 298 77 K using a microprobe in combination with thermal stage. libethenite pseudomalachite are different, line differences crystal structure composition. the three polymorphs similar, particularly stretching region, but characteristic deformation regions observed. Differences also observed phosphate regions. Copyright © 2002 John Wiley & Sons, Ltd.
Abstract Raman spectroscopy was used to determine the molecular behaviour of DMSO and DMSO‐ d 6 , compare it with that in DMSO‐intercalated kaolinites. For at 298 K two bands are observed 2994 2913 cm −1 assigned antisymmetric symmetric CH stretching modes. At 77 degeneracy these is lost. Bands now as 3001, 2995 2988 2923, 2909 2885 respectively. low‐defect kaolinite, band resolves into five component 2882, 2907, 2917, 2920 2937 . The CD modes spectrum found 2250 2125 Both show some...
It is known that boehmite (AlOOH) nanofibers formed in the presence of nonionic poly(ethylene oxide) (PEO) surfactant at 373 K. A novel approach proposed this study for growth nanofibers: when fresh aluminum hydrate precipitate was added regular interval to initial mixture and PEO K, grow from 40 50 nm long over 100 nm. believed micelles play an important role nanofiber growth: directing assembly particles through hydrogen bonding with hydroxyls on surface particles. Meanwhile a gradual...