X-ray diffraction and scanning electron microscopic studies on the crystal structure and surface/interface morphology of zinc-octaethylporphyrin films on an indium tin oxide substrate spin coated with 3,4-polyethylenedioxythiophene:polystyrenesulfonate

2009 ◽  
Vol 106 (2) ◽  
pp. 023526 ◽  
Author(s):  
S. Ryuzaki ◽  
J. Onoe
2021 ◽  
Author(s):  
Subramaniyan Keerthana ◽  
Rathinam Yuvakkumar ◽  
Ponnusamy Senthil Kumar ◽  
Ganesan Ravi ◽  
Dhayalan Velauthapillai ◽  
...  

Abstract Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 was synthesized by employing solvothermal route. X-ray diffraction, UV-vis absorption, photoluminescence, Raman, scanning electron microscopic studies confirmed the structural, optical, morphological behaviors. The XRD pattern of Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 correlated well with JCPDS # 65-2435. The crystallite size was found to be 57, 49 and 40 nm. The photoluminescence spectra showed the semiconducting property of the prepared Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3. The absorption spectra of the Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 nanorods were well matched with the spectra of the previous report. The band gap of the Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 was calculated to be 1.56, 1.45 and 1.3 eV in reducing order. The morphology of the Bi2S3, 5 ml EG-Bi2S3, 10 ml EG-Bi2S3 samples showed the development of nanorods. 10 ml EG-Bi2S3 sample showed better development of nanorods with the addition of ethylene glycol. The agglomeration was considerably reduced with the mixing of solvent. 10 ml EG- Bi2S3 sample investigated showed 86% of efficiency towards dye degradation. The narrow band gap, defined morphology of 10 ml EG- Bi2S3 made a positive result towards efficient photocatalytic activity.


2005 ◽  
Vol 16 (9) ◽  
pp. 1687-1692 ◽  
Author(s):  
I V Kityk ◽  
J Ebothé ◽  
I Fuks-Janczarek ◽  
A Ali Umar ◽  
K Kobayashi ◽  
...  

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3249 ◽  
Author(s):  
Satoshi Idenoue ◽  
Yoshitaka Oga ◽  
Daichi Hashimoto ◽  
Kazuya Yamamoto ◽  
Jun-ichi Kadokawa

In this study, we have performed the preparation of reswellable amorphous porous celluloses through regeneration from hydrogels. The cellulose hydrogels were first prepared from solutions with an ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl), in different concentrations. Lyophilization of the hydrogels efficiently produced the regenerated celluloses. The powder X-ray diffraction and scanning electron microscopic measurements of the products suggest an amorphous structure and porous morphology, respectively. Furthermore, the pore sizes of the regenerated celluloses, or in turn, the network sizes of cellulose chains in the hydrogels, were dependent on the concentrations of the initially prepared solutions with BMIMCl, which also affected the tensile mechanical properties. It was suggested that the dissolution states of the cellulose chains in the solutions were different, in accordance with the concentrations, which representatively dominated the pore and network sizes of the above materials. When the porous celluloses were immersed in water, reswelling was observed to regenerate the hydrogels.


1993 ◽  
Vol 11 (5) ◽  
pp. 2802-2807 ◽  
Author(s):  
Hirofumi Yamashita ◽  
Tetsuya Yamaguchi ◽  
Ryohei Miyagawa

2013 ◽  
Vol 721 ◽  
pp. 33-36 ◽  
Author(s):  
Hong Cheng Pan ◽  
Xue Peng Li ◽  
Wei Hong Liu ◽  
Yan Bin Ren

ZnS thin films were deposited on indium–tin-oxide (ITO) coated glass substrates by a chemical bath deposition method. Then the ZnS/ITO slides were immersed in the solution containing 6 mM phosphate buffer solution (pH 7.4), sodium polyacrylate (0.01% w/w), and 0.24 mM AgNO3 at 37°C for 3 h to growth Ag2S films on the surface of ZnS/ITO slides. The absorption band of Ag2S/ZnS/ITO slide displays a considerably blue-shifted. The X-ray diffraction analysis demonstrated the presence of acanthite Ag2S on the surface of ZnS/ITO slides, which is consistent with the cyclic voltammetic data.


2004 ◽  
Vol 19 (10) ◽  
pp. 2905-2912 ◽  
Author(s):  
Tokeer Ahmad ◽  
Ashok K. Ganguli

Nanoparticles of barium orthotitanate (Ba2TiO4) was obtained using microemulsions (avoiding Ba-alkoxide). Powder x-ray diffraction studies of the powder after calcining at 800 °C resulted in a mixture of orthorhombic (70%) and monoclinic (30%) phases. The high-temperature orthorhombic form present at 800 °C was due to the small size of particles obtained by the reverse micellar route. Pure orthorhombic Ba2TiO4 was obtained on further sintering at 1000 °C with lattice parameters a = 6.101(2) Å, b =22.94(1) Å, c = 10.533(2) Å (space group, P21nb). The particle size obtained from x-ray line broadening studies and transmission electron microscopic studies was found to be 40–50 nm for the powder obtained after heating at 800 °C. Sintering at 1000 °C showed increase in grain size up to 150 nm. Our studies corroborate well with the presence of a martensitic transition in Ba2TiO4. The dielectric constant was found to be 40 for Ba2TiO4 (at 100 kHz) for samples sintered at 1000 °C. The dielectric loss obtained was low (0.06) at 100 kHz.


2013 ◽  
Vol 78 (9) ◽  
pp. 1387-1395 ◽  
Author(s):  
Nebojsa Nikolic ◽  
Vesna Maksimovic ◽  
Goran Brankovic ◽  
Predrag Zivkovic ◽  
Miomir Pavlovic

Lead electrodeposition processes from the basic (nitrate) and complex (acetate) electrolytes were mutually compared by the scanning electron microscopic and the X-ray diffraction analysis of the produced powder particles. The shape of dendritic particles strongly depended on the type of electrolyte. The dendrites composed of stalk and weakly developed primary branches (the primary type) were predominantly formed from the basic electrolyte. The ramified dendrites composed of stalk and of both primary and secondary branches (the secondary type) were mainly formed from the complex electrolyte. In the both type of powder particles Pb crystallites were predominantly oriented in the (111) plane. Formation of powder particles of the different shape with the strong (111) preferred orientation was discussed and explained by the consideration of the general characteristics of the growth of a crystal in the electrocrystallization processes.


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