Microwave-Assisted Hydrothermal Preparation of YVO4:Eu3+ Phosphor

YVO4:Eu3+ phosphors were prepared by microwave hydrothermal method in this work. YVO4:Eu3+ phosphors were probed by photoluminescence (PL), X-ray powder diffraction (XRD) and scanning electron microscope (SEM). The effects of different preparation conditions on the photoluminescence, the structure and the morphology of YVO4:Eu3+ phosphors were studied. The experiment results show that the pH value and the Eu3+ doping amount have some important effect on the photoluminescence and the morphology of YVO4:Eu3+phosphors.

Morphology Control of the Nano-MnO2 by Microwave Hydrothermal Synthesis

10.4028/www.scientific.net/amr.624.47 ◽

2012 ◽

Vol 624 ◽

pp. 47-50

Author(s):

Shi Lei Zhang ◽

Ben Niu ◽

Enlei Qi ◽

Lei Wang ◽

Jie Qiang Wang

Keyword(s):

Hydrothermal Synthesis ◽

Energy Dispersive Spectrometer ◽

Raw Material ◽

X Ray Diffraction ◽

Crystal Forms ◽

X Ray ◽

Microwave Assisted ◽

Structure And Morphology ◽

Microwave Hydrothermal ◽

In this paper, KMnO4 was used as raw material, nano-MnO2 with different morphologies such as flowers globular, hollow tubular and rodlike were obtained by the microwave assisted hydrothermal synthesis under the acidic condition. The crystal structure and morphology of the resultant MnO2 were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM), respectively. The elements and content of samples were tested by Energy Dispersive Spectrometer (EDS). The influence of reaction temperature and holding time on crystal forms and morphologies of the MnO2 was analyzed.

Hydrothermal Preparation of B-Doped TiO2 and Photodegradation of Salicylic Acid under Visible Light

10.4028/www.scientific.net/amr.557-559.1592 ◽

2012 ◽

Vol 557-559 ◽

pp. 1592-1595 ◽

Cited By ~ 1

Author(s):

Xiao Lin Liu ◽

Wen Lu Guo ◽

Jing Jing Ma

Keyword(s):

Salicylic Acid ◽

Electron Microscope ◽

Hydrothermal Synthesis ◽

Visible Light ◽

Degradation Rate ◽

Diffuse Reflectance ◽

X Ray Diffraction ◽

Hydrothermal Preparation ◽

X Ray ◽

B-doped TiO2 nanoparticles have been successfully prepared using hydrothermal synthesis with tetrabuttyl titanate and boric acid as precursor. The prepared samples were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (UV-vis DRS), scanning electron microscope (SEM). The B-doped TiO2 nanoparticles were red-shifted than P25. And the degradation rate of B-TiO2 is 72.62% in 120 min by degradation of salicylic acid under visible light irradiation.

Microwave Hydrothermal Synthesis of W-Doped CuS Nanoparticle

10.4028/www.scientific.net/amr.906.196 ◽

2014 ◽

Vol 906 ◽

pp. 196-199 ◽

Cited By ~ 1

Author(s):

Wen Xiang Ye ◽

Quan Xin Zhu ◽

Wan Qing Xiong ◽

Jian Lei ◽

Xue Hong Liao

Keyword(s):

Electron Microscopy ◽

Copper Sulfide ◽

Fluorescence Spectra ◽

Raw Materials ◽

Copper Nitrate ◽

Butyl Lithium ◽

X Ray ◽

Microwave Hydrothermal ◽

Microwave Hydrothermal Method ◽

The CuS nanoparticles precursor have been synthesized by microwave irradiation, using copper nitrate and thioacetamide (TAA) as raw materials, dodecyl sodium sulfate as surfactants. After the precursor had being split with n-butyl lithium for 14 days, we synthesized w-doped copper sulfide nanoparticles with microwave hydrothermal method. The samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and fluorescence spectra.

Fabrication of Accurate Diamond - Metal Composite Cutting Blade by Electrotyping Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.304-305.57 ◽

2006 ◽

Vol 304-305 ◽

pp. 57-61

Author(s):

L.L. Fang ◽

Bing Lin Zhang ◽

Ning Yao

Keyword(s):

Electron Microscope ◽

Ph Value ◽

Photoemission Spectroscopy ◽

Metal Composite ◽

X Ray Diffraction ◽

Electrolytic Solution ◽

X Ray ◽

In this paper, we report that the experimental results of fabricated diamond-metal composite film. Electrotyping method was used to deposit the thick film. During the deposition, low internal stress electrolytic solution, the electric current density of cathode, PH value, temperature, the distance between cathode and anode, the pretreatment of motherboard cathode were selected simultaneously. It was found that stirring strongly affected the quality of the film. Especially stirring velocity affected the distribution of diamond grains. Scanning electron microscope (SEM), X-ray photoemission spectroscopy (XPS) and X-ray diffraction (XRD) were used to measure the surface morphology, the crystal microstructure, diamond grains distribution and the chemical environment of the film.

Synthese of Cancrinite from Alkali-Fused Fly Ash by “Dry Method”

10.4028/www.scientific.net/amr.236-238.676 ◽

2011 ◽

Vol 236-238 ◽

pp. 676-679 ◽

Cited By ~ 2

Author(s):

Ya Juan Zhao ◽

Xi Cheng Zhao ◽

Hui Dong Xie ◽

Yuan Ru Jiang

Keyword(s):

Electron Microscope ◽

Fly Ash ◽

Solid State ◽

Crystallization Time ◽

X Ray Diffraction ◽

Synthesis Mechanism ◽

Major Phase ◽

X Ray ◽

Preparation Conditions ◽

In this study, zeolite was prepared from fused fly ash with very little water treatment. The as-prepared zeolite was characterized by X-ray diffraction (XRD) and scanning electron microscope. XRD results showed that cancrinite was the major phase in the product. The influence of preparation conditions on the yield of zeolite was described. Experiments showed that the crystallization time of zeolite became shorter and the crystallinity of cancrinite became higher with the increase of NaOH dose in fusion stage. Based on the fact that the water was not enough to be as the solvent which was different from conventional method, it can be concluded that the synthesis mechanism of zeolite from fused fly ash is the Solid-state Conversion Theory.

MICROWAVE HYDROTHERMAL SYNTHESIS OF RUTILE TiO2 NANORODS

International Journal of Modern Physics B ◽

10.1142/s0217979205031663 ◽

2005 ◽

Vol 19 (15n17) ◽

pp. 2763-2768 ◽

Cited By ~ 17

Author(s):

GUOBIN MA ◽

XIAONING ZHAO ◽

JIANMIN ZHU

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Transmission Electron Microscopy ◽

X Ray Diffraction ◽

High Quality ◽

X Ray ◽

Microwave Hydrothermal ◽

Transmission Electron ◽

Microwave Hydrothermal Method ◽

We present in this paper the synthesis of rutile TiO 2 nanorods using an efficient microwave hydrothermal method. The product was characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy, and the results indicated the growth of high quality rutile nanorods along the c-axis of rutile TiO 2 and the radial aggregation of them into spherical secondary nanoparticles.

Study on Removal of Organic Matter by Enhanced Filtration with Iron-Coated Ceramsite

10.4028/www.scientific.net/amr.255-260.2681 ◽

2011 ◽

Vol 255-260 ◽

pp. 2681-2685

Author(s):

Gui Qing Gao ◽

Hai Yan Ju ◽

Zhi Jie Ju

Keyword(s):

Organic Matter ◽

Electron Microscope ◽

Ph Value ◽

Filtration Efficiency ◽

Experimental Result ◽

X Ray Diffraction ◽

X Ray ◽

Temperature Method ◽

Coated Layer ◽

Coating of iron-oxide can improve the surface characters of original filter media, and will enhance filtration efficiency, this study assume the high-temperature method to prepare iron-coated ceramsite. Four coating parameters were investigated: pH value, FeCl3 concentration, baking temperature and baking time. The scanning electron microscope (SEM) and X-Ray diffraction were used to observe the surface properties of the coated layer. Using iron-coated ceramsite in enhanced filtration, removal properties of organic matter were studied. The experimental result indicated under the modifying condition of 0.4 pH value, 2mol/L FeCl3, 650°C baking temperature and 3h baking time, the iron-coated ceramsite has the best removal of organic matter. It has bigger specific surface area. The removal efficiency was increased with the increment of the influent concentration of organic matter and the decrease of velocity. When the pH value was slightly acid, the effect on organic matter removing was best.

X-ray micro tomography in the scanning electron microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107678 ◽

1978 ◽

Vol 36 (1) ◽

pp. 106-107 ◽

Cited By ~ 1

Author(s):

W. Brünger

Keyword(s):

Electron Beam ◽

Electron Microscope ◽

Target Surface ◽

The Body ◽

X Rays ◽

Cross Sectional ◽

X Ray ◽

Micro Tomography ◽

Reconstructive tomography is a new technique in diagnostic radiology for imaging cross-sectional planes of the human body /1/. A collimated beam of X-rays is scanned through a thin slice of the body and the transmitted intensity is recorded by a detector giving a linear shadow graph or projection (see fig. 1). Many of these projections at different angles are used to reconstruct the body-layer, usually with the aid of a computer. The picture element size of present tomographic scanners is approximately 1.1 mm2.Micro tomography can be realized using the very fine X-ray source generated by the focused electron beam of a scanning electron microscope (see fig. 2). The translation of the X-ray source is done by a line scan of the electron beam on a polished target surface /2/. Projections at different angles are produced by rotating the object.During the registration of a single scan the electron beam is deflected in one direction only, while both deflections are operating in the display tube.

PHAX-SCAN: Functional integration of a Scanning Electron Microscope and an energy-dispersive x-ray analyser

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100152252 ◽

1989 ◽

Vol 47 ◽

pp. 56-57

Author(s):

Marc H. Peeters ◽

Max T. Otten

Keyword(s):

Electron Microscope ◽

High Speed ◽

High Performance ◽

Functional Integration ◽

Energy Dispersive ◽

X Rays ◽

X Ray ◽

High Speed Analysis ◽

Over the past decades, the combination of energy-dispersive analysis of X-rays and scanning electron microscopy has proved to be a powerful tool for fast and reliable elemental characterization of a large variety of specimens. The technique has evolved rapidly from a purely qualitative characterization method to a reliable quantitative way of analysis. In the last 5 years, an increasing need for automation is observed, whereby energy-dispersive analysers control the beam and stage movement of the scanning electron microscope in order to collect digital X-ray images and perform unattended point analysis over multiple locations.The Philips High-speed Analysis of X-rays system (PHAX-Scan) makes use of the high performance dual-processor structure of the EDAX PV9900 analyser and the databus structure of the Philips series 500 scanning electron microscope to provide a highly automated, user-friendly and extremely fast microanalysis system. The software that runs on the hardware described above was specifically designed to provide the ultimate attainable speed on the system.

PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽

10.31266/at.v28i1.1434 ◽

2013 ◽

Vol 28 (1) ◽

Author(s):

Maya Komalasari ◽

Bambang Sunendar

Keyword(s):

Fourier Transform ◽

Electron Microscope ◽

Sol Gel ◽

Crosslinking Agent ◽

X Ray Diffraction ◽

Nano Tio2 ◽

X Ray ◽

Infra Red ◽

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1, yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.