TiO2-CdS Nanocomposites: Effect of CdS Oxidation on the Photocatalytic Activity

Nanocomposites TiO2-CdS with different relative contents of CdS (molar ratios Cd/Ti = 0.02, 0.03, 0.05, 0.1, 0.2, and 0.5) were studied. The structural, photophysical, and chemical properties were investigated using XRD, Raman spectroscopy, XPS, GSDR, and LIL. XRD and Raman results confirmed the presence of TiO2 and CdS with intensities dependent on the ratio Cd/Ti. The presence of CdSO4 was detected by XPS at the surface of all TiO2-CdS composites. The relative amount of sulphate was dependent on the CdS loading. Luminescence time-resolved spectra clearly proved the existence of an excitation transfer process from CdS to TiO2 through the luminescence emission from TiO2 after excitation of CdS at λexc=410 nm, where no direct excitation of TiO2 occurs. Photodegradation of a series of aromatic carboxylic acids—benzoic, salicylic, 4-bromobenzoic, 3-phenylpropionic, and veratric acids—showed a great enhancement in the photocatalytic efficiency of the TiO2-CdS composites, which is due, mainly, to the effect of the charge carriers’ increased lifetime. In addition, it was shown that the oxidation of CdS to CdSO4 did not result in the deactivation of the photocatalytic properties and even contributed to enhance the degradation efficiency.

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Physical and Chemical Properties of MoP, Ni2P, and MoNiP Hydrodesulfurization Catalysts: Time-Resolved X-Ray Diffraction, Density Functional, and Hydrodesulfurization Activity Studies.

ChemInform ◽

10.1002/chin.200339018 ◽

2003 ◽

Vol 34 (39) ◽

Cited By ~ 1

Author(s):

Jose A. Rodriguez ◽

Jae-Yong Kim ◽

Jonathan C. Hanson ◽

Stephanie J. Sawhill ◽

Mark E. Bussell

Keyword(s):

Density Functional ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

X Ray Diffraction ◽

Time Resolved ◽

X Ray ◽

Hydrodesulfurization Catalysts ◽

Physical And Chemical ◽

Hydrodesulfurization Activity ◽

And Chemical Properties

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Classification and Visualization of Physical and Chemical Properties of Falsified Medicines with Handheld Raman Spectroscopy and X-Ray Computed Tomography

American Journal of Tropical Medicine and Hygiene ◽

10.4269/ajtmh.16-0971 ◽

2017 ◽

Vol 97 (3) ◽

pp. 684-689 ◽

Cited By ~ 9

Author(s):

Tomoko Kakio ◽

Kazunobu Moriguchi ◽

Susan Macha ◽

Kazuko Kimura ◽

Naoko Yoshida ◽

...

Keyword(s):

Computed Tomography ◽

Raman Spectroscopy ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

X Ray ◽

Falsified Medicines ◽

X Ray Computed ◽

Physical And Chemical ◽

And Chemical Properties

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Physical and Chemical Properties of MoP, Ni2P, and MoNiP Hydrodesulfurization Catalysts: Time-Resolved X-ray Diffraction, Density Functional, and Hydrodesulfurization Activity Studies

The Journal of Physical Chemistry B ◽

10.1021/jp022639q ◽

2003 ◽

Vol 107 (26) ◽

pp. 6276-6285 ◽

Cited By ~ 142

Author(s):

José A. Rodriguez ◽

Jae-Yong Kim ◽

Jonathan C. Hanson ◽

Stephanie J. Sawhill ◽

Mark E. Bussell

Keyword(s):

Density Functional ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

X Ray Diffraction ◽

Time Resolved ◽

X Ray ◽

Hydrodesulfurization Catalysts ◽

Physical And Chemical ◽

Hydrodesulfurization Activity ◽

And Chemical Properties

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Synthese und Eigenschaften von Brom(methyl)- und Iod(methyl)(organyIthio)gallanen / Synthesis and Properties of Bromo(methyl)- and Iodo(methyl)(organylthio)gallanes

Zeitschrift für Naturforschung B ◽

10.1515/znb-1985-0304 ◽

1985 ◽

Vol 40 (3) ◽

pp. 335-342 ◽

Cited By ~ 21

Author(s):

Gerhard G. Hoffmann

Keyword(s):

Chemical Properties ◽

Physical And Chemical Properties ◽

Molar Ratios ◽

New Compounds ◽

Physical And Chemical ◽

And Chemical Properties

The reaction between dibromo- or diiodo(methyl)gallane and the trimethylsilyl sulphides (CH3)3SiSR (R = CH3, C2H5, n-C3H7, i-C3H7. Ph, CH2Ph) have been investigated. Halo(methyl)- (organylthio)gallanes are formed. These compounds and their chloro analogues can also be obtained by the reactions between the dihalo(methyl)gallanes and the corresponding leaddi- (thiolates) in the molar ratios 2:1, or from the halo(dimethyl)gallanes and free thiols. Some physical and chemical properties of the new compounds are given, and the tentative mechanisms of these reactions are discussed. Syntheses of methylgalliumdiiodide and dimethylgalliumhalides via trimethylgallane und galliumtrihalides or methylgalliumdihalides are described.

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Optical trapping-Raman spectroscopy (OT-RS) with embedded microscopy imaging for concurrent characterization and monitoring of physical and chemical properties of single particles

Analytica Chimica Acta ◽

10.1016/j.aca.2018.02.062 ◽

2018 ◽

Vol 1020 ◽

pp. 86-94 ◽

Cited By ~ 13

Author(s):

Zhiyong Gong ◽

Yong-Le Pan ◽

Gorden Videen ◽

Chuji Wang

Keyword(s):

Raman Spectroscopy ◽

Optical Trapping ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

Single Particles ◽

Microscopy Imaging ◽

Physical And Chemical ◽

And Chemical Properties

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Statistical criteria of stellar population types

Symposium - International Astronomical Union ◽

10.1017/s0074180900053304 ◽

1966 ◽

Vol 24 ◽

pp. 101-110

Author(s):

W. Iwanowska

Keyword(s):

Stellar Population ◽

Chemical Properties ◽

Spectrophotometric Study ◽

Physical And Chemical Properties ◽

Population Type ◽

The Galaxy ◽

Distribution Parameters ◽

Physical And Chemical ◽

Statistical Criteria ◽

And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

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The microstructure of a TiB2/Ti-47 Al composite material

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100155347 ◽

1989 ◽

Vol 47 ◽

pp. 674-675

Author(s):

O. Popoola ◽

A.H. Heuer ◽

P. Pirouz

Keyword(s):

Composite Material ◽

Ion Beam ◽

Chemical Properties ◽

Intermetallic Alloys ◽

Transmission Electron ◽

Diamond Polishing ◽

Al Composite ◽

The Matrix ◽

Argon Ion ◽

And Chemical Properties

The addition of fibres or particles (TiB2, SiC etc.) into TiAl intermetallic alloys could increase their toughness without compromising their good high temperature mechanical and chemical properties. This paper briefly discribes the microstructure developed by a TiAl/TiB2 composite material fabricated with the XD™ process and forged at 960°C.The specimens for transmission electron microscopy (TEM) were prepared in the usual way (i.e. diamond polishing and argon ion beam thinning) and examined on a JEOL 4000EX for microstucture and on a Philips 400T equipped with a SiLi detector for microanalyses.The matrix was predominantly γ (TiAl with L10 structure) and α2(TisAl with DO 19 structure) phases with various morphologies shown in figure 1.

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Tailoring microstructures of materials through biomimetics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100148332 ◽

1993 ◽

Vol 51 ◽

pp. 500-501

Author(s):

Mehmet Sarikaya ◽

Ilhan A. Aksay

Keyword(s):

Chemical Properties ◽

Design And Synthesis ◽

Structure Sensitive ◽

Macro Scale ◽

Methods Of Synthesis ◽

Successive Level ◽

Engineering Materials ◽

Physical And Chemical ◽

And Chemical Properties ◽

Synthesis Of Materials

Biomimetics involves investigation of structure, function, and methods of synthesis of biological composite materials. The goal is to apply this information to the design and synthesis of materials for engineering applications.Properties of engineering materials are structure sensitive through the whole spectrum of dimensions from nanometer to macro scale. The goal in designing and processing of technological materials, therefore, is to control microstructural evolution at each of these dimensions so as to achieve predictable physical and chemical properties. Control at each successive level of dimension, however, is a major challenge as is the retention of integrity between successive levels. Engineering materials are rarely fabricated to achieve more than a few of the desired properties and the synthesis techniques usually involve high temperature or low pressure conditions that are energy inefficient and environmentally damaging.In contrast to human-made materials, organisms synthesize composites whose intricate structures are more controlled at each scale and hierarchical order.

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