ChemInform Abstract: Pentavalent Uranium Oxide via Reduction of [UO2]2+under Hydrothermal Reaction Conditions.

ChemInform ◽  
2009 ◽  
Vol 40 (8) ◽  
Author(s):  
Nebebech Belai ◽  
Mark Frisch ◽  
Eugene S. Ilton ◽  
Bruce Ravel ◽  
Christopher L. Cahill
Keyword(s):  
Uranium Oxide ◽  
Hydrothermal Reaction ◽  
Reaction Conditions ◽  
Pentavalent Uranium

Pentavalent Uranium Oxide via Reduction of [UO2]2+Under Hydrothermal Reaction Conditions†

2008 ◽  
Vol 47 (21) ◽  
pp. 10135-10140 ◽  
Author(s):  
Nebebech Belai ◽  
Mark Frisch ◽  
Eugene S. Ilton ◽  
Bruce Ravel ◽  
Christopher L. Cahill
Keyword(s):  
Uranium Oxide ◽  
Hydrothermal Reaction ◽  
Reaction Conditions ◽  
Pentavalent Uranium

Effect of one-step hydrothermal reaction conditions on the crystal growth of nano-/micro-MoS2

Ionics ◽  
2021 ◽  
Author(s):  
Xiangyun Qiu ◽  
Tao Zhang ◽  
Zuoqiang Dai ◽  
Ru Cao ◽  
Tao Wei
Keyword(s):  
Crystal Growth ◽  
Hydrothermal Reaction ◽  
Reaction Conditions ◽  
One Step

Evolution of Crystalline Phase and Morphology of the Products Formed during the Hydrothermal Synthesis of Y2O3 Powders

2011 ◽  
Vol 189-193 ◽  
pp. 1275-1279
Author(s):  
Ying Wang ◽  
Gao Yang Zhao ◽  
Li Yuan
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Treatment ◽  
Crystalline Phase ◽  
Hydrothermal Reaction ◽  
Yttrium Nitrate ◽  
Temperature Reaction ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Transmission Electron

The crystalline phase and morphology of the products formed during the synthesis of yttrium oxide via the hydrothermal treatment yttrium nitrate were characterized by X-ray diffraction, transmission electron microscopy and scanning electron microscopy. Products with high OH/NO3ratios are formed with the increasing of hydrothermal treatment. The crystalline phases are evolved from Y2(OH)5.14(NO3)0.86•H2O toY4O(OH)9(NO3) and finally Y(OH)3. The hydrothermal reaction conditions play an important role in the synthesis of the microstructures. Results show the particle size and final morphology of samples could be controlled by reaction temperature, reaction time, and OH-concentration. Sheets, hexagonal and needle-like Y2O3powders are obtained with the hydrothermal treatment of yittrium nitrate at 180 oC to 200oC for 2-8 hours at pH 9-13.

scholarly journals Effect of Hydrothermal Reaction Conditions on Filtration Performance of Sludge

2014 ◽  
Vol 93 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Nobusuke KOBAYASHI ◽  
Satoshi TACHIBANA ◽  
Shinpei NOMURA ◽  
Yasuhiro TANABE ◽  
Yukihiro FUJIMURA ◽  
...  
Keyword(s):  
Hydrothermal Reaction ◽  
Reaction Conditions ◽  
Filtration Performance

The effect of an anionic starburst dendrimer on the crystallization of BaWO4 under hydrothermal reaction conditions

2004 ◽  
Vol 267 (3-4) ◽  
pp. 569-573 ◽  
Author(s):  
Fan Zhang ◽  
Shi-Ping Yang ◽  
Hong-Mei Chen ◽  
Zhi-Han Wang ◽  
Xi-Bin Yu
Keyword(s):  
Hydrothermal Reaction ◽  
Reaction Conditions

Removal of Chromium and Nickel Ions from Synthetic Solution by the Ferrite Process

2010 ◽  
Vol 113-116 ◽  
pp. 2251-2254 ◽  
Author(s):  
Xiao San Song ◽  
San Fan Wang ◽  
Jiong Yuan Lu
Keyword(s):  
Heavy Metals ◽  
Hydrothermal Reaction ◽  
Technological Parameters ◽  
Reaction Conditions ◽  
Nickel Ions ◽  
Leaching Toxicity ◽  
Stirring Time ◽  
Synthetic Solution ◽  
Optimum Reaction ◽  
Leaching Procedure

Pollution with Cr (VI) and Ni (II) waste water is frequently encountered together in practice, and the ferrite process carves out a new way for the treatment of wastewater contaminated by heavy metals. The purpose of this study is to investigate the treatment of Cr (VI) and Ni (II) wastewater by the ferrite process.In this paper, the ferrite process of Cr (VI) and Ni (II) synthetic solution by hydrothermal reaction and its technological parameters was sdudied. The most optimum reaction conditions were explored: pH=9.0, temperature=70°C, stirring time=40min, stirring speed=120 rpm. Leaching toxicity of heavy metals from Ni–Cr ferrite prepared in the experiment was much lower than the regulated limit of Toxicity Characteristic Leaching Procedure (TCLP), indicating that Ni–Cr ferrite had a better chemical stability. Therefore, the ferrite process is a feasible method with respect to the removal of chromium and nickel ions from wastewater.

scholarly journals Garcinia Mangostana Peel Extract as Sustainable Fuel Source on Ceria Synthesis under Hydrothermal Condition

2019 ◽  
Vol 8 (3) ◽  
pp. 255-261
Author(s):  
Salprima Yudha S ◽  
◽  
Morina Adfa ◽  
Aswin Falahudin ◽  
Deni Agus Triawan ◽  
...  
Keyword(s):  
Crystal Size ◽  
Hydrothermal Reaction ◽  
Hydrothermal Condition ◽  
Fluorite Structure ◽  
X Ray Diffraction ◽  
Garcinia Mangostana ◽  
Reaction Conditions ◽  
Xrd Pattern ◽  
X Ray ◽  
Fuel Source

Cerium (IV) oxide or ceria (CeO2) was fabricated by heating an aqueous extract of Garcinia mangostana and cerium (III) nitrate in hydrothermal autoclave reactor at 200 °C for 3 hours, followed by calcination at 600 °C for 5 hours. The powder X-ray diffraction (XRD) pattern of the precipitate from cerium(III) nitrate under hydrothermal reaction conditions shows no clear XRD peaks, indicating its amorphous nature. In contrast, the products from the calcinated samples exhibit XRD peaks, which correspond to cubic fluorite structure with an average crystal size of 7.55 nm. The elemental mapping using the energy-dispersive X-ray (EDX) analysis reveals the main elements present were cerium and oxygen, with minor impurities in low amounts. The presence of Garcinia mangostana extract is predicted to be the key component and fuel source to obtain CeO2 particles with narrow crystal size.

scholarly journals LaCO3OH Nanoprisms and Their Luminescence and NO Reduction Properties

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 394
Author(s):  
Md. Hasan Zahir ◽  
Mohammad Mominur Rahman ◽  
Md Shafiullah ◽  
Mohammad Mizanur Rahman ◽  
Amjad Ali ◽  
...  
Keyword(s):  
Large Scale ◽  
No Reduction ◽  
Hydrothermal Reaction ◽  
Particle Morphology ◽  
Molar Ratio ◽  
Broad Emission Band ◽  
Organic Additives ◽  
Reaction Conditions ◽  
Broad Emission ◽  
Three Samples

In this work, single-crystalline large-scale LaCO3OH nanoprism morphologies were synthesized by controlling La and Ca molar ratio and the hydrothermal reaction conditions. The nanoprism morphologies of LaCO3OH were unique in nature with a sharp corner and smooth surfaces. The hydrothermal reaction was carried out in the absence of organic additives or templates and (NH4)2CO3 was used as a precipitation agent. The molar ratio of La:Ca was varied over the following values (the sample shorthand is given in parentheses): 75:25 mol% (LC-1), 50:50 mol% (LC-2), and 25:75 mol% (LC-3). Phase-pure LaCO3OH nanoprisms formed at a La:Ca molar ratio of 75:25 mol% without any assistance of catalysts or template. The photoluminescence (PL) properties of the as-synthesized powders showed one broad emission band centered at 394 nm after excitation of the pure LC-3 LaCO3OH nanoprisms at λ = 280 nm. The PL intensities were decreased in the order of LC-1 < LC-2< LC-3. The LC-1 and LC-2 samples had almost the same PL intensities probably due to their unique and smooth particle morphology. The calcination result of three samples treated for two hours at 800 °C, shows a reduction in NO activities over highly distributed CaO comprising La2O3. Further, under the presence of H2O and O2 vapor, CaO comprising La2O3 catalysts shows higher stability for the reduction of NO with CH4.

Effect of hydrothermal reaction conditions on the optical properties of ZnO nanorods

2008 ◽  
Vol 403 (10-11) ◽  
pp. 1960-1963 ◽  
Author(s):  
Jaejin Song ◽  
Seonghoon Baek ◽  
Sangwoo Lim
Keyword(s):  
Optical Properties ◽  
Hydrothermal Reaction ◽  
Zno Nanorods ◽  
Reaction Conditions

Effect of Hydrothermal Reaction Conditions on the Sizes and Morphologies of ZnO Nanorods

2013 ◽  
Vol 765-767 ◽  
pp. 3170-3175 ◽  
Author(s):  
Jian Jiao Zhang ◽  
Hong Yan Yue ◽  
Er Jun Guo ◽  
Li Ping Wang ◽  
Chun Yu Zhang ◽  
...  
Keyword(s):  
Hydrothermal Reaction ◽  
Zno Nanorods ◽  
Influence Factors ◽  
Particle Morphology ◽  
Precursor Concentration ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Hydrothermal Temperature ◽  
Zno Nanostructure ◽  
Temperature Time

The influence factors of hydrothermal treatment on the formation process of ZnO nanorods are investigated involving with hydrothermal temperature, time and precursor concentration. The as-obtained products were characterized by Scanning Electron microscope (SEM) and X-ray diffraction (XRD), respectively. XRD result indicates that the obtained ZnO nanorods are high-quality single crystals. SEM results indicate that both the diameter and the length of ZnO nanorods increase with increasing the hydrothermal time and temperature. The precursor concentration prominently determines the morphologies of ZnO nanostructure from initial particle morphology to rod-like, and to final slice-like morphology.

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