Synthesis of Copper Oxide Nanopowder by Microwave Method

2018 ◽  
Vol 283 ◽  
pp. 154-159
Author(s):  
Pusit Pookmanee ◽  
Pimpaka Sangthep ◽  
Jiratchaya Tafun ◽  
Viruntachar Kruefu ◽  
Suchanya Kojinok ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Copper Oxide ◽  
Single Phase ◽  
Functional Group ◽  
Copper Acetate ◽  
Chemical Compositions ◽  
Microwave Method ◽  
X Ray ◽  
Infrared Spectrometer ◽  
Scanning Electron

Copper oxide nanopowder was successfully synthesized by microwave method. Copper acetate and sodium hydroxide were used as the starting precursors. The microwave power was set to 800 Watt for 2-6 min and fine black nanopowder was obtained. The nanopowder was milled and dried at 80 °C for 12 h. The structure was identified by X-ray diffractometer (XRD). A monoclinic single phase of CuO nanopowder structure was obtained without calcination steps. The morphology was investigated by scanning electron microscope (FESEM). The particle was irregular in shape and agglomerated. The chemical composition was determined by energy dispersive X-ray spectrometer (EDXS). The chemical compositions showed the characteristic X-ray energy of copper (Kα=8.048 keV) and oxygen (Kα=0.525 keV), respectively. The functional group was investigated by fourier transform infrared spectrometer (FTIR). The functional groups of the vibration Cu-O bending showed the wavenumber at 491-615 cm-1.

Synthesis, Characterization and its Photocatalytic of Copper Oxide (CuO) Powder

2019 ◽  
Vol 962 ◽  
pp. 70-76 ◽  
Author(s):  
Pusit Pookmanee ◽  
Pimpaka Sangthep ◽  
Jiratchaya Tafun ◽  
Viruntachar Kruefu ◽  
Suchanya Kojinok ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Copper Oxide ◽  
Single Phase ◽  
Functional Group ◽  
Copper Acetate ◽  
Chemical Compositions ◽  
Microwave Method ◽  
X Ray ◽  
Infrared Spectrometer ◽  
Scanning Electron

In this research, copper oxide (CuO) powder was successfully synthesized by microwave method. Copper acetate and sodium hydroxide were used as the starting precursors. The microwave power was annealed at 600-800 Watt for 6 min. The fine black powder was obtained, milled and dried at 80 °C for 12 h. The structure was identified by X-ray diffractometer (XRD). A monoclinic single phase was obtained without calcination steps. The morphology was investigated by field emission scanning electron microscope (FESEM). The particle was irregular in shape and agglomerated. The chemical composition was determined by energy dispersive X-ray spectrometer (EDXS). The chemical compositions showed the characteristic X-ray energy of copper (Cu, Lα = 0.929 keV) and oxygen (O, Kα = 0.525 keV). The functional group was investigated by fourier transform infrared spectrometer (FTIR). The functional groups of the vibration Cu-O bending showed the wavenumber at 514-615 cm-1. The degradation of methylene blue (MB) over CuO powder was studied by ultraviolet-visible spectrophotometer (UV-Vis). The highest percentage of MB degradation for CuO powder annealed at 800 Watt for 6 min was about 33.72.

The Characterization of Bismuth Vanadate Powder Synthesized by a Modified Microwave Method

2015 ◽  
Vol 1103 ◽  
pp. 85-90
Author(s):  
Pusit Pookmanee ◽  
Prakasit Intaphong ◽  
Sukon Phanichphant
Keyword(s):  
Functional Group ◽  
Bismuth Vanadate ◽  
Microwave Method ◽  
X Ray ◽  
Calcination Step ◽  
Irradiation Power ◽  
Infrared Spectrometer ◽  
Multi Phase ◽  
Scanning Electron

Bismuth vanadate (BiVO4) powder was synthesized by a modified microwave method. Bismuth nitrate pentahydrate, ammonium metavanadate and 2-propanol were used as the starting precursors. The final pH of solution was adjusted to 7 and irradiation power at 600 Watt for 2 and 6 min. The yellow powder was filtered and dried at 100 °C for 24h. The phase of BiVO4 powder was characterized by X-ray diffractometer (XRD). Multi-phase of monoclinic and tetragonal phase was obtained without calcination step. The morphology of BiVO4 powder was investigated by scanning electron microscope (SEM). The BiVO4 powder was irregular in shape and agglomerated with the range particle of 0.1–0.3 μm. The functional group of BiVO4 powder was investigated by fourier transform infrared spectrometer (FTIR). The wavenumber at 498–502 cm-1 and 746–762 cm-1 was corresponding to the vibration of Bi-O bending and VO43- stretching, respectively.

scholarly journals Construction of in situ degradation bacteria of corn straw and analysis of its degradation efficiency

2020 ◽  
Vol 70 (1) ◽  
Author(s):  
Xiujie Gong ◽  
Hongtao Zou ◽  
Chunrong Qian ◽  
Yang Yu ◽  
Yubo Hao ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Degradation Efficiency ◽  
Corn Straw ◽  
X Ray ◽  
In Situ Degradation ◽  
Infrared Spectrometer ◽  
Scanning Electron

Abstract Purpose The highly efficient degradation bacteria were selected from the humus from the very cold straw in China for many years to construct the in situ degradation bacteria, and the degradation efficiency of corn straw was determined by process optimization. Methods According to the main components of corn straw, through morphological, physiological, and biochemical screening, three highly efficient complementary degradation strains were selected to construct the compound flora, and the degradation efficiency was analyzed by Fourier transform infrared spectrometer, field emission scanning electron microscope, and X-ray diffractometer. Result The corn straw selected in this paper is mainly composed of cellulose (31.99%), hemicellulose (25.33%), and lignin (14.67%). Through the determination of enzyme activity, strain Streptomyces sp. G1T has high decomposition ability to cellulose and hemicellulose but weak utilization ability to lignin; strain Streptomyces sp. G2T has the strongest decomposition ability to cellulose and hemicellulose among the three strains. The decomposition ability of strain Streptomyces sp. G3T to lignin was the strongest among the three strains. Therefore, by compounding the three strains, the decomposition ability has been greatly improved. The optimal process conditions obtained by single factor and response surface method are as follows: pH is 7, temperature is 30 °C, inoculation amount is 5%, rotational speed is 210 rpm, and the weight loss rate of straw is 60.55% after decomposing for 7 days. A large amount of degradation of corn straw can be seen by Fourier transform infrared spectrometer, field emission scanning electron microscope, and X-ray diffractometer. Conclusion Streptomyces sp. G1T, Streptomyces sp. G2T, and Streptomyces sp. G3T screened from straw humus in very cold areas were used to construct in situ degradation bacteria, which had good straw degradation activity and had the potential to be used for straw treatment in cold areas after harvest. This characteristic makes the complex bacteria become a strong competitive candidate for industrial production, and it is also an effective biotechnology in line with the current recycling of resources.

scholarly journals Characteristics of Paraffin Shielding of Kartini Reactor, Yogyakarta

2020 ◽  
Vol 35 (3) ◽  
pp. 195-198 ◽  
Author(s):  
Lana Khanifah ◽  
Susilo Widodo ◽  
Widarto ◽  
Ngurah Made Dharma Putra ◽  
Argo Satrio
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Nuclear Energy ◽  
Functional Group ◽  
Energy Agency ◽  
Radiation Attenuation ◽  
X Ray ◽  
Scanning Electron

The National Nuclear Energy Agency (BATAN) Yogyakarta uses two kinds of paraffin for shielding radiation of Kartini reactor. For developing BNCT research, the radiation attenuation capability of paraffin has been analyzed to find out the coefficient attenuation, density, and composition of both kinds of paraffin. The components of the paraffin were analyzed using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) spectroscopy characterization. Paraffin P1 has a density of 0.689 gr/mL and paraffin P2 is 0.578 gr/mL. Paraffin samples P1 and P2 were the sample content of functional group CH, CH2, and OH when analyzed by FTIR. Paraffin P2 had an additional content namely CO. The concentration of carbon (C) and oxide (O) of paraffin P2 was much greater than that of paraffin P1. Hydrogen (H) in the paraffin has the function of moderating neutrons, but hydrogen content in both kinds of paraffin could not be detected by EDX. The acquired neutron coefficient attenuation of paraffin P2 was 0.0382 cm-1 and the gamma coefficient attenuation was 0.0535 cm-1.

Characterization of Diatomite, Leonardite and Pumice

2016 ◽  
Vol 872 ◽  
pp. 211-215 ◽  
Author(s):  
Pusit Pookmanee ◽  
Atit Wannawek ◽  
Sakchai Satienperakul ◽  
Ratchadapon Putharod ◽  
Nattapol Laorodphan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Functional Group ◽  
Chemical Compositions ◽  
Carbonyl Groups ◽  
X Ray Diffraction ◽  
X Ray ◽  
Properties Of Materials ◽  
Scanning Electron

This research studies compositions of diatomite, leonardite and pumice for utilization appropriate to the properties of materials. Chemical compositions of these materials were characterized by X–ray fluorescence spectrometry (XRF) and energy dispersive X–ray spectrometry (EDXS). The silica was major component of these materials. The morphology was investigated by scanning electron microscopy (SEM). Diatomite was cylindrical in shape, leonardite was sheet or flake in shape and pumicewas prismatic in shape. The structure was studied by X–ray diffraction (XRD). It was found that the mineral composition of diatomite, leonardite and pumice showed cristobalite low, quartz and anorthite, respectively. The functional groups were identified by Fourier transform infraredspectrometry (FTIR). The functional group of siloxane was obtained and dominated vibration in these materials. And the vibration of carboxylic, alcoholic and carbonyl groups were obtained in leonardite.

Characterization of Bismuth Vanadate Nanopowder Prepared by Microwave Method

2016 ◽  
Vol 872 ◽  
pp. 253-257 ◽  
Author(s):  
Pusit Pookmanee ◽  
Prakasit Intaphong ◽  
Jitrephan Phanmalee ◽  
Wiyong Kangwansupamonkon ◽  
Sukon Phanichphant
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Bismuth Vanadate ◽  
Microwave Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ammonium Vanadate ◽  
Scanning Electron

Bismuth vanadate (Bi2VO5.5) nanopowder was prepared by microwave method at 500 Watt for 2, 4 and 6 min. Bismuth nitrate pentahydrate (Bi (NO3)3•5H2O) and ammonium vanadate (NH4VO3) were used as the starting precursors with mole ratio of 2:1. The phase of Bi2VO5.5 nanopowder was characterized by X-ray diffraction (XRD). The morphology of Bi2VO5.5 nanopowder was investigated by scanning electron microscopy (SEM). The chemical composition of Bi2VO5.5 nanopowder was determined by energy dispersive X-ray spectroscopy (EDXS). The functional groups of Bi2VO5.5 nanopowder was identified by fourier transform infrared spectroscopy (FTIR).

Hydrothermal Synthesis of Copper (II) Oxide Microparticle

2020 ◽  
Vol 861 ◽  
pp. 337-343
Author(s):  
Pusit Pookmanee ◽  
Piyarat Somsri ◽  
Sukon Phanichphant ◽  
Chanchana Thanachayanont
Keyword(s):  
Hydrothermal Method ◽  
Single Phase ◽  
Functional Group ◽  
Ph Value ◽  
Fine Powder ◽  
Chemical Compositions ◽  
Mixed Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nitrate Trihydrate

CuO microparticle was syntheszied by hydrothermal method. The starting precursors were used as copper (II) nitrate trihydrate (Cu (NO3)2·3H2O), nitric acid (HNO3) and sodium hydroxide (NaOH). The final pH value of the mixed solution was used 2M NaOH to adjust the pH was 8 and treated at 100-200 oC for 4-6 h in a hydrothermal vessel. The black fine powder was obtained after dried at 100 oC for 5 h. The phase and structure of CuO microparticle were characterized by X-ray diffraction (XRD). A single phase monoclinic structure synthezied by hydrothermal method at 200 oC for 4 and 6 h was obtained without calcination steps. The morphology CuO microparticle was investigated by scanning electron microscopy (SEM). It was likely grain in shape and the particle size in range of 2.94-4.06 μm. The element composition of CuO microparticle was indicated by energy dispersive X-ray spectrometry (EDX). The chemical compositions showed the characteristic X-ray energy of copper (Kα = 0.98 keV) and oxygen (Kα = 0.53 keV), respectively. The functional group of CuO microparticle was indentified by Fourier transform spectrophotometry (FTIR). The wavenumber at 690, 514 and 437 cm-1 was corresponded to vibration of Cu-O stretching.

Properties of Geopolymer Paste from Fly Ash Blended with Metakaolin as Pervious Concrete

2016 ◽  
Vol 690 ◽  
pp. 179-186 ◽  
Author(s):  
Phachongkit Boonanunwong ◽  
Pimpawee Keawpapasson ◽  
Chayanee Tippayasam ◽  
Parjaree Thavorniti ◽  
Prinya Chindaprasirt ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fourier Transform ◽  
Fly Ash ◽  
Coarse Aggregate ◽  
Chemical Compositions ◽  
Geopolymer Concrete ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lignite Fly Ash ◽  
Scanning Electron

The purpose of this research was to study pervious geopolymer concrete with different amounts of lignite fly ash (F), metakaolin (M), sodium silicate (NS) and 8 mol/L sodium hydroxide (NH) solution. Constant NS/NH ratio of 0.5, three alkali liquid/pozzolan (L/P) ratios viz., 0.5, 0.6 and 0.7 and pozzolan to coarse aggregate ratio of 1:8 were used. The compressive strengths of 50×50×50 mm3 cube specimens were tested at the age of 28 days. In addition, compressive strengths of 100 mm in diameter and 200 mm in height cylindrical specimens were tested at the age of 7, 14, 21 and 28 days. The chemical compositions and microstructures of specimens were characterized by X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM), respectively.The mixture with 50%F+50%M and L/P ratio of 0.7 was the best proportion for pervious geopolymer concrete according to the compressive strength, good permeability and microstructural images. The bond of Si-O-Al and Si-O-Si characterized by Fourier Transform Infrared Spectroscopy (FTIR) spectra confirmed the developed geopolymeric structure.

scholarly journals Facile Synthesis of Micro CuO Crystals for Li Ion Full Battery

2021 ◽  
Author(s):  
Y.Z. Song ◽  
Z.J. Liu ◽  
B.X. Qi ◽  
Mengting Li ◽  
Jimin Xie ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Graphite Anode ◽  
Facile Synthesis ◽  
X Ray ◽  
Infrared Spectrometer ◽  
One Step ◽  
Current Densities ◽  
Li Ion ◽  
Charge Discharge ◽  
Scanning Electron

Abstract One step facile synthesis of micro CuO crystals is carried out by hydrothermal method. The porous lithium foil/Li-graphite is used as the anode for CuO-Li ion full battery. The micro CuO crystals are characterized by scanning electron micro porousscopy, X-ray powder diffractometer, Fourier Transform infrared spectrometer, thermogravimeter and differential scanning calorimeter. The battery with porous lithium foil/graphite anode is tested by the galvanostatic current charge-discharge technology at higher current densities of 0.25～0.5 mA/cm2. The porous lithium foil-graphite anode can effectively improve the discharge capacity of the CuO crystal battery.

scholarly journals Elemental and Infrared Characterization of Contaminants in Second-Hand Cotton Garments From Flea Markets In Valencia City, Bukidnon, Philippines

2018 ◽  
Vol 8 (1) ◽  
pp. 10
Author(s):  
Marilou Auxtero Pedroso Butanas ◽  
Bienvenido Masirin Butanas Jr.
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Functional Group ◽  
X Ray ◽  
Cotton Material ◽  
Flea Markets ◽  
Flea Market ◽  
Scanning Electron

The use of Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) characterizations have been indispensable techniques in distinguishing purity of the samples. These techniques give spectra that will be used to analyze the composition, morphology, purity, among others, of the material. One of its interesting applications is to assess elemental and chemical contaminations on second hand clothing. In this study, second hand (Ukay-Ukay) cotton garments from selected flea market sites in Valencia City, Bukidnon, Philippines were examined quantitatively for microbial and chemical contaminations by using FTIR, SEM, and EDX. The FTIR results obtained in both sites showed broad peaks at ~3336 cm-1 attributed to OH functional group, and absorption peaks at 2901.30 cm-1 associated to C-H bond, 1159.70 cm-1, 1107.44 cm-1 and 1053.82 cm-1 attributed to the stretches of CO bond. All of them were characteristics of cotton material. We observed degradation of the cotton material on both sites evident in the decreasing intensity of OH stretching (at peaks around ~3334 cm -1 [site A] and ~3332 cm -1 [site B]) and C-O stretching (around ~1500-1700 cm-1). These were due to the presence of microorganisms such as fungi (e.g. Aspergillus species). The degradation was also observed in the SEM results. Furthermore, peaks related to carboxylate contaminants were observed in both sites around ~1600 – 1800 cm-1 that may be caused by the exposure of the cotton garments in hydrochloric acid (HCl). In general, the characterization results on both sites indicated traces of microorganisms and that the second-hand cotton clothes were contaminated by hazardous chemicals.

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