Raman Spectral Studies of Aqueous Zinc Nitrate Solution at High Temperatures and at a High Pressure of 30 MPa

1998 ◽  
Vol 102 (16) ◽  
pp. 3029-3035 ◽  
Author(s):  
Yutaka Ikushima ◽  
Norio Saito ◽  
Masahiko Arai
Keyword(s):  
High Pressure ◽  
High Temperatures ◽  
Nitrate Solution ◽  
Zinc Nitrate ◽  
Spectral Studies ◽  
Zinc Nitrate Solution ◽  
Raman Spectral

Supported CuO and ZnO Catalyst for Hydrogenation of Carbon Dioxide to Methyl Alcohol

2012 ◽  
Vol 550-553 ◽  
pp. 396-399
Author(s):  
Chul Min Park ◽  
Won Ju Ahn ◽  
Woong Kyu Jo ◽  
Jin Hun Song ◽  
Chang Yeop Oh ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Methyl Alcohol ◽  
Nitrate Solution ◽  
Catalyst Support ◽  
Zinc Nitrate ◽  
Zinc Nitrate Solution ◽  
Cupric Nitrate ◽  
Air Atmosphere ◽  
Co Precipitation ◽  
Hydrogenation Of Carbon Dioxide

If the surface of the titanium chips (TC) was modified by thermal treatment under air atmosphere, it could be reused as catalyst support or photocatalytic materials. TC-supported CuO and ZnO catalysts were prepared by impregnation (IMP) method and co-precipitation (CP) method using cupric nitrate and zinc nitrate solution as precursors. Loading of CuO and ZnO on TC was 40.6wt% and 50.3wt%, respectively. The catalytic activity for CO2 hydrogenation was investigated using a flow-typed reactor under various pressures. Conversion of carbon dioxide to methyl alcohol over the CuO-ZnO/TC catalyst by CP and IMP methods were ca. 22% and ca. 10%, respectively. Conversion of carbon dioxide over CuO-ZnO/TC catalyst by CP method was increased with increasing reaction temperature in ranging of 15atm to 30 atm. Maximum selectivity and yield to methyl alcohol over CuO-ZnO/TC catalyst at 250°C were ca. 90% at 20 atm and ca. 18.2% at 30 atm, respectively.

Photoluminescence of ZnO layers grown on opals by chemical deposition from zinc nitrate solution

2004 ◽  
Vol 19 (7) ◽  
pp. 851-854 ◽  
Author(s):  
V V Ursaki ◽  
I M Tiginyanu ◽  
V V Zalamai ◽  
V M Masalov ◽  
E N Samarov ◽  
...  
Keyword(s):  
Nitrate Solution ◽  
Chemical Deposition ◽  
Zinc Nitrate ◽  
Zinc Nitrate Solution

A study of the electrochemical synthesis of ZnO thin films

1997 ◽  
Vol 75 (11) ◽  
pp. 1439-1444 ◽  
Author(s):  
Z.H. Gu ◽  
T.Z. Fahidy ◽  
R. Hornsey ◽  
A. Nathan
Keyword(s):  
Zinc Oxide ◽  
Nitrate Solution ◽  
Zinc Nitrate ◽  
X Ray Diffraction ◽  
Zinc Nitrate Solution ◽  
Principal Characteristics ◽  
X Ray ◽  
Oxide Cathode ◽  
Diffraction Patterns ◽  
Xrd Patterns

The principal characteristics of the cathode deposition of zinc oxide from slightly acidified aqueous zinc nitrate solution at 65 °C were studied via potentiodynamic electrolysis, potentiostatic electrolysis, and X-ray diffraction patterns. The results indicate the reliability of a low-temperature electrolytic path of synthesis, and avenues of further exploration. Keywords: zinc oxide, cathode deposition, XRD patterns, FBM theory.

Vibrational Spectral Studies of Solutions at Elevated Temperatures and Pressures. IV. Raman Spectra of Aqueous Zinc Nitrate Solutions

1983 ◽  
Vol 37 (1) ◽  
pp. 50-55 ◽  
Author(s):  
D. E. Irish ◽  
T. Jarv
Keyword(s):  
Raman Spectra ◽  
Elevated Temperatures ◽  
Nitrate Solution ◽  
Ion Association ◽  
Outer Sphere ◽  
Solvation Shell ◽  
Zinc Nitrate ◽  
Spectral Studies ◽  
Tetrahedral Configuration ◽  
Nitrate Ion

Raman spectra of 5.196 m aqueous zinc nitrate solution have been measured at a pressure of 11 MPa and temperatures ranging from 25 to 300°C. A band at 386 cm−1, assigned to the hexaaquazinc(II) cation, decreases in intensity and increases in freqeuncy as the temperature rises. These observations are consistent with the replacement of water molecules in the primary solvation shell of Zn2+ by a nitrate ion. Changes in the spectrum of nitrate ion support this interpretation. Evidence is also presented which suggests that the octahedral configuration around Zn2+ is being changed to a tetrahedral configuration. Estimates are made of the populations of inner sphere and outer sphere nitrate; from the plots of log Qm vs 1/ T estimates are made of ΔH and Δ S for the ion association. The plots are remarkably linear over 275 degrees of temperature.

Hybrid thin films of ZnO with porphyrins and phthalocyanines prepared by one-step electrodeposition

2004 ◽  
Vol 08 (12) ◽  
pp. 1366-1375 ◽  
Author(s):  
Esther Michaelis ◽  
Kazuteru Nonomura ◽  
Derck Schlettwein ◽  
Tsukasa Yoshida ◽  
Hideki Minoura ◽  
...  
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Chloride Solution ◽  
Zinc Complex ◽  
Nitrate Solution ◽  
Zinc Nitrate ◽  
Hybrid Films ◽  
Zinc Nitrate Solution ◽  
Zinc Chloride Solution ◽  
Hybrid Thin Films

Hybrid thin films of crystalline zinc oxide and the zinc complex of 5,10,15,20-tetrakis-(4-sulfonatophenyl)porphyrin (ZnTPPS) have been prepared by cathodic electrodeposition from different aqueous zinc salt solutions. Films from a solution containing zinc nitrate and the porphyrin derivate show a rough surface and porosity, whereas films prepared from an oxygen-saturated zinc chloride solution were very smooth. The presence of the porphyrin derivative in the deposition solution has a clear influence on the morphology of the hybrid films compared with pure zinc oxide films. In aqueous zinc nitrate solution the addition of the porphyrin derivative hinders the growth of zinc oxide. In contrast, the addition of the dye to the oxygen-saturated zinc chloride solution leads to an increase of the growth rate of ZnO /porphyrin hybrid films. An increased spectral absorbance was reached when two dyes (zinc complex of tetrasulfonated phthalocyanine and porphyrin) were added to the zinc nitrate solution since the electrodeposited hybrid thin films contained both dyes. UV-vis spectra revealed the presence of both macrocyclic metal complexes in the ZnO films.

scholarly journals Easy Synthesis and Efficient Photocatalytic Activities of ZnO/Mordenite Composite

2008 ◽  
Vol 17 (6) ◽  
pp. 096369350801700
Author(s):  
Lingling Wang ◽  
Hong Wu ◽  
Jinquan Xu ◽  
Ling Li
Keyword(s):  
Nitrate Solution ◽  
Zinc Nitrate ◽  
Bet Surface Area ◽  
Nanoporous Material ◽  
Zinc Nitrate Solution ◽  
Nano Zno ◽  
Photocatalytic Activities ◽  
Zno Particles ◽  
Degussa P25

A new nanoporous material consisting of nano-ZnO particles designed within the cavities and frameworks of mordenite has been synthesized and characterized. The synthesis involves a precipitation of Zinc oxide from Zinc nitrate solution on mordenite by salt melting procedure which is in the present of Nitric acid. These materials were characterized by BET surface area, XRD, UV-Vis-DRS, AAS, and HRTEM. The characterization of ZnO/mordenite composite clearly shows that some of nano-ZnO particles were encapsulated within the cavities and frameworks of mordenite. The photodegradation of methyl orange which occurs in the present of ZnO/mordenite composite is a little superior to that of Degussa P25 TiO2.

Raman Spectral Studies of Aqueous Strontium Nitrate Solution Up to 450 °C and 40 MPa

1998 ◽  
Vol 71 (8) ◽  
pp. 1763-1769 ◽  
Author(s):  
Yutaka Ikushima ◽  
Kiyotaka Hatakeda ◽  
Norio Saito ◽  
Masahiko Arai
Keyword(s):  
Nitrate Solution ◽  
Spectral Studies ◽  
Strontium Nitrate ◽  
Raman Spectral
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