Preparation and characterization of activated aluminum powder by magnetic grinding method for hydrogen generation

2013 ◽  
Vol 38 (8) ◽  
pp. 1016-1023 ◽  
Author(s):  
Honglei Zhang ◽  
Yingxiang Sun ◽  
Feng He ◽  
Xianjin Yu ◽  
Zengdian Zhao
Keyword(s):  
Aluminum Powder ◽  
Hydrogen Generation ◽  
Grinding Method

scholarly journals Synthesis and Characterization of K-Ta Mixed Oxides for Hydrogen Generation in Photocatalysis

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Beata Zielińska ◽  
Ewa Mijowska ◽  
Ryszard J. Kalenczuk
Keyword(s):  
Diffuse Reflectance ◽  
Hydrogen Generation ◽  
Mixed Oxides ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Photocatalytic Hydrogen Generation ◽  
Irregular Structure ◽  
Transmission Electron

K-Ta mixed oxides photocatalysts have been prepared by impregnation followed by calcination. The influence of the reaction temperature (450°C–900°C) on the phase formation, crystal morphology, and photocatalytic activity in hydrogen generation of the produced materials was investigated. The detailed analysis has revealed that all products exhibit high crystallinity and irregular structure. Moreover, two different crystal structures of potassium tantalates such as KTaO3and K2Ta4O11were obtained. It was also found that the sample composed of KTaO3and traces of unreacted Ta2O5(annealed at 600°C) exhibits the highest activity in the reaction of photocatalytic hydrogen generation. The crystallographic phases, optical and vibronic properties were examined by X-ray diffraction (XRD) and diffuse reflectance (DR) UV-vis and resonance Raman spectroscopic methods, respectively. Morphology and chemical composition of the produced samples were studied using a high-resolution transmission electron microscope (HR-TEM) and an energy dispersive X-ray spectrometer (EDX) as its mode.

scholarly journals Perbaikan Kelarutan Albendazol Melalui Pembentukan Kristal Multikomponen dengan Asam Malat

2020 ◽  
Vol 6 (1) ◽  
pp. 114-123
Author(s):  
Fikri Alatas ◽  
Fahmi Abdul Azizsidiq ◽  
Titta Hartyana Sutarna ◽  
Hestyari Ratih ◽  
Sundani Nurono Soewandhi
Keyword(s):  
Phase Solubility ◽  
Crystal Formation ◽  
Solubility Curve ◽  
X Ray Diffraction ◽  
Ethanol Mixture ◽  
X Ray ◽  
Grinding Method ◽  
Diffraction Patterns ◽  
Phase Solubility Curve

An effort to improve the solubility of albendazole (ABZ), an anthelmintic drug has been successfully carried out through the formation of multicomponent crystal with dl-malic acid (MAL). Construction of phase solubility curve of ABZ in MAL solution and crystal morphological observations after recrystallization in the acetone-ethanol (9:1) mixture were performed for initial prediction of multicomponent crystal formation. ABZ-MAL multicomponent crystal was prepared by wet grinding or also known as solvent-drop grinding (SDG) with acetone-ethanol (9:1) mixture as a solvent followed by characterization of the multicomponent crystal formation by powder X-ray diffraction and Fourier transform infrared (FTIR) methods. The solubility of ABZ-MAL multicomponent crystal was tested in water at ambient temperature and in pH 1.2, 4.5 and 6.8 of buffered solutions at 37°C. The phase solubility curve of the ABZ in the MAL solution showed type Bs. The ABZ-MAL mixture has a different crystalline morphology than pure ABZ and MAL after recrystallization in the acetone-ethanol mixture (9:1). The powder X-ray diffraction pattern and the FTIR spectrum of ABZ-MAL from SDG different from intact ABZ and MAL powder X-ray diffraction patterns and these results can indicate the ABZ-MAL multicomponent crystal formation. The ABZ-MAL multicomponent crystal has better solubility than pure ABZ in all media used. These results can be concluded that ABZ-MAL multicomponent crystal can be prepared by solvent-drop grinding method with acetone-ethanol (9:1) mixture as a solvent and can increase the solubility of albendazole.

Synthesis and characterization of Ni2P and MoS2 on MWCNT as an innovative catalytic material for hydrogen generation

2020 ◽  
Vol 503 ◽  
pp. 144163
Author(s):  
E. Ramírez-Mondragón ◽  
O.E. Contreras ◽  
U.J. Tamayo-Pérez ◽  
M.T. Oropeza-Guzmán
Keyword(s):  
Hydrogen Generation ◽  
Synthesis And Characterization ◽  
Catalytic Material

Evaluation of a cobalt–molybdenum–boron catalyst for hydrogen generation of alkaline sodium borohydride solution–aluminum powder system

2013 ◽  
Vol 224 ◽  
pp. 304-311 ◽  
Author(s):  
Da-Wei Zhuang ◽  
Qiang Kang ◽  
Sean S. Muir ◽  
Xiangdong Yao ◽  
Hong-Bin Dai ◽  
...  
Keyword(s):  
Aluminum Powder ◽  
Sodium Borohydride ◽  
Hydrogen Generation ◽  
Powder System ◽  
Sodium Borohydride Solution

Characterization of Fe 2 O 3 /CeO 2 oxygen carriers for chemical looping hydrogen generation

2018 ◽  
Vol 43 (6) ◽  
pp. 3154-3164 ◽  
Author(s):  
Shiwei Ma ◽  
Shiyi Chen ◽  
Ahsanullah Soomro ◽  
Min Zhu ◽  
Wenguo Xiang
Keyword(s):  
Hydrogen Generation ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Chemical Looping Hydrogen Generation

scholarly journals Development and characterization of sustainable lightweight geopolymer composites

Cerâmica ◽  
2019 ◽  
Vol 65 (373) ◽  
pp. 153-161 ◽  
Author(s):  
H. M. Khater
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Aluminum Powder ◽  
Building Materials ◽  
Microstructural Characteristics ◽  
Imaging Results ◽  
Lightweight Composites ◽  
Sem Imaging ◽  
Geopolymer Composites

Abstract Production of lightweight building materials attract the attention of the scientists worldwide with the need for reducing the structure deadweight, provide better thermal insulation for buildings, and cost less to transport. The current work focused on the production of lightweight geopolymer composites by the incorporation of aluminum powder and aluminum slag in various ratios for water-cooled slag/kaolinite sand composite; the activators used were 6% of equal ratio from sodium hydroxide and sodium silicate. The properties of the produced lightweight geopolymer composites were studied by measurement of compressive strength, bulk density, water absorption, FTIR, XRD and SEM imaging. Results showed the enhancement for both physicomechanical and microstructural characteristics with using aluminum powder and aluminum slag forming lightweight composites with densities below 2.15 g/cm3 depending on the studied mix composition.

Formation and characterization of gray Ta2O5 and its enhanced photocatalytic hydrogen generation activity

2020 ◽  
Vol 45 (33) ◽  
pp. 16560-16568 ◽  
Author(s):  
Wei-Szu Liu ◽  
Ming-Wei Liao ◽  
Sheng-Hsin Huang ◽  
Yves Ira A. Reyes ◽  
Hsin-Yi Tiffany Chen ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Photocatalytic Hydrogen Generation ◽  
Generation Activity
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