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Online since: July 2011
Authors: Ju Gong Zheng, Ting Yang
Compare infrared absorption band of as-sample with ionic liquid, it can be found that they have the same specific absorption peak, but the strength has been weakened and the peak moving toward the lower wave number.
The infrared spectrum of the power being compared with the spectrum of ionic liquid, it can be seen that the strength of ionic liquid has been weakened and the peak moving toward the lower wave number.
Table 1 Nuclear Magnetic Resonance Spectra of Hydrogen-1 of [Beim]BF4 H/C Subsumption Chemical shift(δ)/10-6 Structure formula and serial number 1 2 3 4 5 6 7 8 9 3H, t,N (CH2) 3CH3 2H, m, N (CH2)2CH2CH3 2H, m, N CH2CH2CH2CH3 2H, t, NCH2 (CH2)2CH3 2H, t, NCH2CH3 3H, s, N CH2CH3 1H, s, CH3CH2NCHCHN 1H, s, CH3CH2NCHCHN 1H, s, NCHN 0.906 1.307 1.843 4.207 4.310 3.657 7.603 7.738 9.185 2.3 XRD analysis of Product.
Fig.2 XRD pattern of the ZnO nanorod sample All the peaks are indexed to typical hexagonal wurtzite structure ZnO, with calculated cell parameters a=3.249 Å and c=5.191 Å, consistent with the standard values for bulk ZnO (JCPDS card No. 79-0205).
In addtion, the wurtzite-structured ZnO crystal is described schematically as a number of alternating planes composed of tetrahedral coordinated O2- and Zn2+ ions, stacked alternatively along the c-axis.
The infrared spectrum of the power being compared with the spectrum of ionic liquid, it can be seen that the strength of ionic liquid has been weakened and the peak moving toward the lower wave number.
Table 1 Nuclear Magnetic Resonance Spectra of Hydrogen-1 of [Beim]BF4 H/C Subsumption Chemical shift(δ)/10-6 Structure formula and serial number 1 2 3 4 5 6 7 8 9 3H, t,N (CH2) 3CH3 2H, m, N (CH2)2CH2CH3 2H, m, N CH2CH2CH2CH3 2H, t, NCH2 (CH2)2CH3 2H, t, NCH2CH3 3H, s, N CH2CH3 1H, s, CH3CH2NCHCHN 1H, s, CH3CH2NCHCHN 1H, s, NCHN 0.906 1.307 1.843 4.207 4.310 3.657 7.603 7.738 9.185 2.3 XRD analysis of Product.
Fig.2 XRD pattern of the ZnO nanorod sample All the peaks are indexed to typical hexagonal wurtzite structure ZnO, with calculated cell parameters a=3.249 Å and c=5.191 Å, consistent with the standard values for bulk ZnO (JCPDS card No. 79-0205).
In addtion, the wurtzite-structured ZnO crystal is described schematically as a number of alternating planes composed of tetrahedral coordinated O2- and Zn2+ ions, stacked alternatively along the c-axis.
Online since: November 2010
Authors: Cheng Guang Zhang, Juan Miao, Kong Zhao Li
When the cathode has a large number of negative charges, these ions move to the cathode and align along the OHP (outer Helmholtz plane).
The number of different metal ions in the OHP can be connected with the concentration of ions, the size of coordination ions, electric charge of central ions and migration velocity of ions in the bulk solution: (1) where VRi is migration velocity of the ions from the OHP to the cathode, Vdi is migration velocity of the ions from the bulk solution to the OHP, Zi is the ionic electric charge number, Ci0 is the bulk solution concentration.
As found in the experiment, at larger current density, the hydrogen evolution is more serious in the electrodeposition, so there are a large number of bubbles near the cathode, the deposition surface quality could also decrease.
As can be seen from Fig.2, the diffraction peak of the ZnSe thin films respectively is 2θ=27.4o, 45.4o and 53.9o and the ZnSe thin films respectively are the cube (111), (220) and (311) by JCPDS card of the ZnSe.
The number of different metal ions in the OHP can be connected with the concentration of ions, the size of coordination ions, electric charge of central ions and migration velocity of ions in the bulk solution: (1) where VRi is migration velocity of the ions from the OHP to the cathode, Vdi is migration velocity of the ions from the bulk solution to the OHP, Zi is the ionic electric charge number, Ci0 is the bulk solution concentration.
As found in the experiment, at larger current density, the hydrogen evolution is more serious in the electrodeposition, so there are a large number of bubbles near the cathode, the deposition surface quality could also decrease.
As can be seen from Fig.2, the diffraction peak of the ZnSe thin films respectively is 2θ=27.4o, 45.4o and 53.9o and the ZnSe thin films respectively are the cube (111), (220) and (311) by JCPDS card of the ZnSe.
Online since: December 2011
Authors: Xin Yan Sun, Ming Zhong He, Hai Feng Li, Gang He, Jian He Hong
The results of the XRD (in Fig.2) showed that only in Mn-rich area the Al2O3-Li2O-Mn2O3 ternary eutectic molten compounds with main diffraction peak of spinel (JCPDS card number: 35-0782) would be made.
Acknowledgements Grateful acknowledgement is made to the support from the National Nature Science Foundation of China (NSFC project number: 50972135, 50821140308), State Key Laboratory of Advanced Technology for Materials Synthesis Processing (Wuhan University of Technology, 2010-KF-6).
Acknowledgements Grateful acknowledgement is made to the support from the National Nature Science Foundation of China (NSFC project number: 50972135, 50821140308), State Key Laboratory of Advanced Technology for Materials Synthesis Processing (Wuhan University of Technology, 2010-KF-6).
Online since: February 2020
Authors: Bandana Panda, Dhrubananda Behera
Both are having orthorhombic structure with pnma space group (JCPDS card no.70-2664).
Nanoparticles have a considerable high value of impedance at every isothermal count due to the presence of the more number of resistive grain boundaries [3]. 3.5 Dielectric Studies The dielectric constant (εʹ) is estimated from the equation εʹ = Cp/C0, where C0 = ϵ0A/d. ϵ0 is the free space permittivity, A is the cross-sectional area of the pallet sample, and d is the thickness of the pallet.
In the event of nanoparticles, the σdc and ωp found to be comparatively low due to the presence of more number of resistive grain boundaries.
Nanoparticles have a considerable high value of impedance at every isothermal count due to the presence of the more number of resistive grain boundaries [3]. 3.5 Dielectric Studies The dielectric constant (εʹ) is estimated from the equation εʹ = Cp/C0, where C0 = ϵ0A/d. ϵ0 is the free space permittivity, A is the cross-sectional area of the pallet sample, and d is the thickness of the pallet.
In the event of nanoparticles, the σdc and ωp found to be comparatively low due to the presence of more number of resistive grain boundaries.
Online since: April 2020
Authors: Nyoman Puspa Asri, W.D. Prasetiyo, A. Kafidhu, A. Atiqoh, E.A. Puspitasari, H. Hindarso, S. Suprapto
Characterization includes FFA concentration, saponification number, iodine number and water content.
The diffraction peaks are in a good agreement with the standard pattern of CuO (JCPDS card NO. 050661).
The intensities and position of the peaks are in good agreement with standard of hexagonal wurtzite ZnO (JCPDS Card No. 36-1451).
The diffraction peaks are in a good agreement with the standard pattern of CuO (JCPDS card NO. 050661).
The intensities and position of the peaks are in good agreement with standard of hexagonal wurtzite ZnO (JCPDS Card No. 36-1451).
Online since: November 2011
Authors: Jin Sheng Liao, Hang Ying You, Qing Xia Wu, He Rui Wen, Jing Lin Chen, Rui Jin Hong
From Fig. 1, it can be seen that all diffraction peaks are well consistent with the standard monoclinic phase (Joint Committee for Power Diffractions Standards, JCPDS card No. 15-0438), and that no traces of additional peaks from other phases were observed.
The standard data for La2(WO4)3 (JCPDS No. 15-0438) is also presented in the figure.
The emission intensity Iem depends on the excitation power IP following to the relationship of Iemµ(IP)n, where n is the number of the pumping photons required to excite RE ions from the ground state to the emitting excited state.
The standard data for La2(WO4)3 (JCPDS No. 15-0438) is also presented in the figure.
The emission intensity Iem depends on the excitation power IP following to the relationship of Iemµ(IP)n, where n is the number of the pumping photons required to excite RE ions from the ground state to the emitting excited state.
Online since: December 2012
Authors: M. Sivabharathy, S. Pandian, R. Legadevi, A. Senthil Kumar, Chandra Prakash, Vasant Naidu, S.K.A. Ahamed Kandu Sahib
The average grain size was determined using the linear intercept method employing the relation [26]
Gavg=1.5L/MN (4)
where L is the total test line length, M the magnification and N the total number of intercepts.
The patterns also revealed the spinal ferrite phase, these XRD patterns match with the JCPDS card number 89-3084 for magnesium ferrite powder and peaks of Sm and Dy are marked in the XRD, which match with the JCPDS card number 26-593.
The patterns also revealed the spinal ferrite phase, these XRD patterns match with the JCPDS card number 89-3084 for magnesium ferrite powder and peaks of Sm and Dy are marked in the XRD, which match with the JCPDS card number 26-593.
Online since: April 2020
Authors: Roto Roto, Nurul Hidayat Aplrilita, Rizal A. Irfai
The Fe3O4 has a cubic system, which can be confirmed by JCPDS card No. 88-0315 [8].
At a pH lower than 3, the increasing number of H+ ions causes the adsorption capacity to decrease because a large number of H+ ions in the solution will block the Cu2+ ion from interacting with the amine group.
The adsorption capacity at pH>3 reduces due to reduced protonation of the amine group on the adsorbent and the increase in the number of OH‒ ions in the solution due to increased pH.
At a pH lower than 3, the increasing number of H+ ions causes the adsorption capacity to decrease because a large number of H+ ions in the solution will block the Cu2+ ion from interacting with the amine group.
The adsorption capacity at pH>3 reduces due to reduced protonation of the amine group on the adsorbent and the increase in the number of OH‒ ions in the solution due to increased pH.
Online since: January 2016
Authors: Srimala Sreekantan, Abdul Rahman Mohamed, Farah Diana Mohd Daud
Cetyltrimethylammonium bromide (CTAB) is most widely used as a cationic surfactant for synthesizing large number of inorganic materials.
The present CTAB beside a large number of Ca(OH)2 nucleation, in the initial period of reaction controls rate of the crystal growth and then the monodisperse Ca(OH)2 pod bundles particle was successfully prepared.
In the XRD pattern, compared with the standard diffraction peaks from JCPDS card no# 01-084-1263, the peaks located at 2θ values of 10–90° can be indexed to the characteristic diffractions of hexagonal phase Ca(OH)2 (a = 3.59180 Å, c = 4.90630 Å).
The sorbent with 0.3g of CTAB exhibited the lowest CO2 adsorption at both reaction and diffusion stages when compared to those of the other sorbents, which could be due to a number of factors such as particles size, surface area and pore volume.
The present CTAB beside a large number of Ca(OH)2 nucleation, in the initial period of reaction controls rate of the crystal growth and then the monodisperse Ca(OH)2 pod bundles particle was successfully prepared.
In the XRD pattern, compared with the standard diffraction peaks from JCPDS card no# 01-084-1263, the peaks located at 2θ values of 10–90° can be indexed to the characteristic diffractions of hexagonal phase Ca(OH)2 (a = 3.59180 Å, c = 4.90630 Å).
The sorbent with 0.3g of CTAB exhibited the lowest CO2 adsorption at both reaction and diffusion stages when compared to those of the other sorbents, which could be due to a number of factors such as particles size, surface area and pore volume.
Online since: December 2010
Authors: Evon Y. Lin Foo, Sabar Derita Hutagalung
When ZnS in the nano size, the number of atoms on the surface are comparable to the number of those are located in the crystalline lattice itself [4-6].
Depending on the capping molecules present on the nanoparticles, the field near the surface varies which depends on the number of defects that have been passivated on the surfaces [16-19].
This lattice constant value was found to be close with the reported value for face-centered cubic ZnS (JCPDS card No. 01-079-0043, a = 0.5318 nm).
Depending on the capping molecules present on the nanoparticles, the field near the surface varies which depends on the number of defects that have been passivated on the surfaces [16-19].
This lattice constant value was found to be close with the reported value for face-centered cubic ZnS (JCPDS card No. 01-079-0043, a = 0.5318 nm).