The Preparation of Cu2ZnSnSe4 Films by Selenization of the Oxide Precursors

2011 ◽  
Vol 418-420 ◽  
pp. 597-601
Author(s):  
Gui Lin Chen ◽  
Lu Jin ◽  
Wei Feng Liu ◽  
Guo Shun Jiang ◽  
Chang Fei Zhu
Keyword(s):  
Electron Microscopy ◽  
Spin Coating ◽  
Low Cost ◽  
Solvent Free ◽  
Coating Process ◽  
X Ray Diffraction ◽  
Mechanochemical Method ◽  
Spin Coating Process ◽  
X Ray ◽  
Scanning Electron

A low-cost non-vacuum process for fabrication of Cu2ZnSnSe4 (CZTSe) films by solvent-free mechanochemical method and spin-coating process is described. First, highly monodisperse Cu, Zn, Sn oxides nanoparticles are synthesized via a facile, solvent-free route. Second, the oxide particulate precursors are deposited in a thin layer by spin-coating technique. Finally, the dry layers are sintered into CZTSe thin films selenization. Through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), it is found that near stoichiometric CZTSe films with a micron-sized grains are obtained in our work.

scholarly journals Calcium pyrophosphate powder derived from avian eggshell waste

Cerâmica ◽  
2016 ◽  
Vol 62 (363) ◽  
pp. 278-280 ◽  
Author(s):  
T. H. A. Corrêa ◽  
J. N. F. Holanda
Keyword(s):  
Electron Microscopy ◽  
Low Cost ◽  
Average Crystallite Size ◽  
Calcium Pyrophosphate ◽  
Precipitation Method ◽  
Medical Applications ◽  
X Ray Diffraction ◽  
X Ray ◽  
Eggshell Waste ◽  
Scanning Electron

Abstract Calcium pyrophosphate (CPP) was prepared by a simple precipitation method using avian eggshell waste as a low-cost alternative calcium precursor source. The synthesized CPP powder was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM/EDS), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). The results indicate that pure β-CPP nanocrystallites (Ca/P = 1.067) were successfully synthesized from avian eggshell waste. The correlation among XRD, SEM/EDS, TGA, and FTIR data is well established. The β-CPP particle exhibited spherical morphology with average crystallite size of 62.3 nm, and can be an important bioceramic for medical applications.

Synthesis, Structure and Properties of Super Fine LiMn2O4

2010 ◽  
Vol 177 ◽  
pp. 9-11 ◽  
Author(s):  
Jie Song ◽  
Bing Xu ◽  
De Xin Huang ◽  
Cai Xia Li ◽  
Qiang Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Electrode Material ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Mechanochemical Method ◽  
X Ray ◽  
Size And Morphology ◽  
Scanning Electron

In this paper, super fine LiMn2O4 powder was synthesized by mechanochemical method starting from Li2CO3 and Mn2O3. The structure, size and morphology of LiMn2O4 were explored with X-ray diffraction and scanning electron microscopy (SEM). The electrochemical properties of LiMn2O4 were studied in 2 mol/L (NH4)2SO4 solution. The result showed that pure spinel LiMn204 powder was prepared after 8h grinding with 3.0KW of power and the particle size was about 1µm. Cyclic vohammetry curve indicate LiMn2O4 electrode material has better capacitive performances.

Preparation of Photocatalytic Nanostructured TiO2 Thin Films

2008 ◽  
Vol 587-588 ◽  
pp. 795-799 ◽  
Author(s):  
A. Di Paola ◽  
M. Addamo ◽  
M. Bellardita ◽  
E. García-López ◽  
G. Marcì ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dip Coating ◽  
Coating Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Glass Slides ◽  
Scanning Electron

Photoactive films consisting of pure anatase, brookite or rutile were deposited on glass slides by a dip coating process from water dispersions or solutions obtained by using TiCl4 as the precursor. The films were characterized by X-ray diffraction, scanning electron microscopy and atomic force microscopy. The photocatalytic activity of the various samples was evaluated by using the photooxidation of 2-propanol in gas solid regime as probe reaction. Brookite and anatase films showed a good photoactivity degrading the substrate and the propanone produced during the reaction.

scholarly journals Superficial Surface Treatment using Atmospheric Plasma on Recycled Nylon 6,6

2021 ◽  
Vol 8 (2) ◽  
pp. 191-196
Author(s):  
M. Rodríguez ◽  
E. Vázquez-Vélez ◽  
H. Martinez ◽  
A. Torres
Keyword(s):  
Physical Chemistry ◽  
Electron Microscopy ◽  
Plasma Treatment ◽  
Spin Coating ◽  
Cost Effective ◽  
Atmospheric Plasma ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nylon 6,6 ◽  
Scanning Electron

Polymers currently represent materials that are cost-effective, while its recycled nature is significant in terms of environmental protection. However, the surface properties of polymers often do not meet the demands of wettability, adhesion, and friction, among others. Atmospheric plasma treatment on the surface of polymers improves its physical-chemistry properties. In this work, a recycled nylon coating was prepared by the spin coating technique and characterized by Fourier transform infrared spectroscopy and X-ray diffraction. This coating was treated by atmospheric plasma, and Raman spectroscopy was performed to analyze the signals related to different functional groups present in the coating surface after plasma treatment. The action of plasma on the surface morphology was observed by scanning electron microscopy. The contact angle results showed an improvement in surface wettability.

scholarly journals TỔNG HỢP LỚP FILM BÁN DẪN MẦM TINH THỂ ZNO TRÊN KÍNH DẪN TRONG SUỐT ITO VỚI THIẾT BỊ TỰ CHẾ SPIN – COATING

2021 ◽  
Vol 44 (02) ◽  
Author(s):  
VĂN THANH KHUÊ ◽  
HUỲNH NGUYỄN VIỆT ĐỨC ◽  
VÕ THÀNH CÔNG ◽  
NGUYỄN VĂN TRỌNG
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solar Cell ◽  
Spin Coating ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron ◽  
Spin Coater

Thiết bị spin coater được thiết kế, chế tạo và ứng dụng để tổng hợp vật liệu màng mỏng đồng nhất trên chất nền phẳng với chi phí phù hợp, dễ sử dụng, khả năng hoạt động ở 2 pha tốc độ với khoảng tốc độ điều chỉnh là 300 - 4800 rpm, độ ổn định tốc độ cao và phù hợp với chất nền phẳng có nhiều hình dạng khác nhau với kích thước tối đa 10 cm. Thiết bị được phát triển trên nền tảng Arduino và công nghệ in nhựa 3D . Film bảng mỏng của vật liệu chất bán dẫn mầm tinh thể ZnO phủ trên đế kính dẫn trong suốt ITO có kích thước 25 mm x 25 mm được tổng hợp bằng thiết bị tự chế spin-coater và phương pháp nhiệt. Các phương pháp phân tích hóa lý hiện đại scanning electron microscopy và x-ray diffraction được áp dụng để nghiên cứu hình thái học và cấu trúc tinh thể của lớp vật liệu. Lớp mầm tinh thể ZnO, là giai đoạn quan trọng trước khi phát triển tinh thể với các hình thù khác nhau ứng dụng trong, điện cực quang điện, thiết bị điện tử quang điện hoá như màn hình cảm ứng, cảm biến, transistor, solar cell.

Temperature Effect on the Thermoluminescent Signal Induced by Gamma Radiation in NaCl

2015 ◽  
Vol 1769 ◽  
Author(s):  
Demetrio Mendoza Anaya ◽  
Pedro R. González Martínez ◽  
María E. Fernández García ◽  
Gilberto Mondragón Galicia ◽  
Claudia E. Gutiérrez Wing
Keyword(s):  
Electron Microscopy ◽  
Gamma Radiation ◽  
Gamma Ray ◽  
Irradiation Time ◽  
Low Cost ◽  
Thermal Treatments ◽  
X Ray Diffraction ◽  
X Ray ◽  
Linear Dependency ◽  
Scanning Electron

ABSTRACTThe effects of thermal treatments on the thermoluminescent (TL) signal of NaCl (ACS reagent) induced by gamma radiation were investigated. Samples of NaCl were thermally treated at 500, 800 and 1000 °C and characterized by X-Ray diffraction and scanning electron microscopy. After their exposure 0.1 to 150 Gy of gamma radiation from a gamma-ray source of 60Co, a TL curve for each temperature of treatment was obtained. We observed a different TL behavior on the irradiated samples as a function of the temperature applied during the thermal treatments. For the sample treated at 500 °C, three peaks centered at 102, 133 and 228 °C were observed. Samples treated at 800 and 1000 °C showed two main peaks at 128 and 220 °C and 136 and 219 °C, respectively; however, the highest TL intensity signal was observed for the sample at 800 °C. All samples showed a linear dependency of the integrated TL intensity from the signal emitted as function of the irradiation time. This is an important advantage because NaCl could be applied as a very low cost thermoluminescent dosimetric material. A comparison between the TL signal induced by gamma radiation in pure and Eu doped NaCl is also reported.

ELECTROLESS DEPOSITION OF Ni-P ALLOYS ON CENOSPHERES BY USING SILVER AS THE CATALYST

2006 ◽  
Vol 20 (12) ◽  
pp. 715-723
Author(s):  
JIAN XU ◽  
WEIHAO XIONG ◽  
AIXIANG ZENG
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Energy Dispersive Spectroscopy ◽  
Electroless Deposition ◽  
Coating Process ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
X Ray ◽  
Electroless Ni ◽  
Scanning Electron

Electroless deposition of Ni-P alloys on cenospheres is demonstrated in the present investigation. AgNO 3 is used as an activator to replace the conventional PdCl 2 activator and [Formula: see text] in the coating bath is used as the reducing agent to replace Sn 2+ in order to lower the overall cost of the coating process. The coated cenospheres are characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX) and powder X-ray diffraction (XRD). It shows that Ni-P alloys uniformly deposit on the surface of the cenospheres under experimental conditions. The possible mechanism of electroless Ni-P alloys coating of cenospheres by using silver as the catalyst is suggested.

Rapid Solvent-Free Melting Synthesis of Tungsten Nitrides with Lamellar, Solid Spherical Nanostructures at a Low Temperature

2012 ◽  
Vol 535-537 ◽  
pp. 314-318
Author(s):  
Wei Luo ◽  
Yan Tang ◽  
De Gang Ouyang ◽  
Bin Han ◽  
Ming Hui Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Photoelectron Spectroscopy ◽  
Solvent Free ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface Areas ◽  
Transmission Electron ◽  
Tungsten Nitrides ◽  
Scanning Electron

A rapid solvent-free melting route has been successfully developed for the synthesis of tungsten nitrides with lamellar and solid spherical nanostructures which have considerably different surface areas (106.4 m2g-1contrast to 8.3 m2g-1) by the reaction of WCl6 and NaNH2 at 220 °C for 2-5 h directly, and it is found that the heat insulating property of reaction container plays important roles in the composition, phase, and morphologies of the nitrides. The products were analyzed by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS). Their thermal stability and surface area were measured by thermogravimetric analysis (TGA) and BET, respectively. Finally, the possible formation mechanism of tungsten nitrides with different morphologies was also investigated.

Synthesis, Structure and Properties of Super Fine Zn2SnO4

2011 ◽  
Vol 492 ◽  
pp. 256-259
Author(s):  
Jie Song ◽  
Cai Xia Li ◽  
Dan Yu Jiang ◽  
Jin Feng Xia ◽  
Qiang Li
Keyword(s):  
Electron Microscopy ◽  
Organic Dye ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Mechanochemical Method ◽  
Alizarin Red ◽  
X Ray ◽  
Bet Method ◽  
Size And Morphology ◽  
Scanning Electron

In this paper, super fine Zn2SnO4 powder was synthesized by mechanochemical method starting from ZnO and SnO2. The structure, size and morphology of Zn2SnO4were explored with X-ray diffraction (XRD), scanning electron microscopy (SEM) and nitrogen sorption analysis with the Brunauer-Emmett-Teller (BET) method. The result showed that pure spinel Zn2SnO4 powder was prepared after 2h grinding with 3.0KW of power and the particle size was about 200 nm. The degradation experiment of organic dye was performed by the photocatalytic methods on the light of wavelength (= 365nm). The powder can degrade Alizarin red solution close to 90% under U-V light with a 9W high.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

Sign in / Sign up

Export Citation Format

Share Document