Shape control of nickel crystals and catalytic hydrogenation performance of ruthenium-on-Ni crystals

CrystEngComm ◽  
2018 ◽  
Vol 20 (1) ◽  
pp. 113-121 ◽  
Author(s):  
Lihua Zhu ◽  
Tuo Zheng ◽  
Jinbao Zheng ◽  
Changlin Yu ◽  
Nuowei Zhang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Catalytic Hydrogenation ◽  
Shape Control ◽  
Effect Of Temperature ◽  
Nickel Crystals

Nickel crystals with various shapes were obtained via hydrothermal synthesis. The effect of temperature and surfactant on nickel morphology was studied.

scholarly journals Ionic liquid assisted hydrothermal synthesis of MoS2 double-shell polyhedral cages with enhanced catalytic hydrogenation activities

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23523-23529 ◽  
Author(s):  
Jiahe Li ◽  
Donge Wang ◽  
Huaijun Ma ◽  
Min Li ◽  
Zhendong Pan ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Hydrothermal Synthesis ◽  
Catalytic Hydrogenation ◽  
Hydrothermal Route

MoS2 double-shell polyhedral cages are synthesized via an ionic liquid assisted hydrothermal route and exhibit enhanced catalytic hydrogenation properties.

Ni2+ ions assisted hydrothermal synthesis of flowerlike Co11(HPO3)8(OH)6 superstructures and shape control

CrystEngComm ◽  
2009 ◽  
Vol 11 (4) ◽  
pp. 570 ◽  
Author(s):  
Yonghong Ni ◽  
Kaiming Liao ◽  
Jianming Hong ◽  
Xianwen Wei
Keyword(s):  
Hydrothermal Synthesis ◽  
Shape Control

Low Temperature Synthesis of PbTiO3 Nanoparticles

2005 ◽  
Vol 475-479 ◽  
pp. 3517-3520
Author(s):  
Yu Jing Sun ◽  
Shi Tian ◽  
Xiao Bing Li
Keyword(s):  
Hydrothermal Synthesis ◽  
Low Temperature ◽  
Hydrothermal Method ◽  
Tetragonal Phase ◽  
Lead Acetate ◽  
Average Diameter ◽  
Effect Of Temperature ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis

PbTiO3 nano-sized powders were synthesized at 150oC by a new hydrothermal [denoted as sol-hydrothermal] method by using modified titanium tetra-n-butoxide and lead acetate as the precursors. Furthermore, tetragonal PbTi0.8O2.6 nano-sized powders were obtained by this method at 80oC. Compared with hydrothermal synthesis, the effect of temperature on the formation of products prepared by sol-hydrothermal was investigated. The characteristics of products were studied by XRD, TEM and SAXS. The results show sol-hydrothermal method choosing acetylacetonate-modified titanium tetra-n-butoxide and lead acetate to form a sol could obtain PbTiO3 in 120nm size and PbTi0.8O2.6 powders with average diameter of 30nm, and both of them are pure tetragonal phase. In addition, PbTi0.8O2.6 could be converted into PbTiO3 gradually after annealed at giving condition.

The effect of temperature on morphology and electrochemical properties of NiCo2S4 by hydrothermal synthesis

2018 ◽  
Vol 11 (03) ◽  
pp. 1850063
Author(s):  
Yanwei Sui ◽  
Haihua Hu ◽  
Yuanming Zhang ◽  
Bin Tang ◽  
Jiqiu Qi ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Electrochemical Properties ◽  
Specific Capacitance ◽  
Hydrothermal Method ◽  
Current Density ◽  
Level Structure ◽  
Hydrothermal Process ◽  
Effect Of Temperature ◽  
Second Step ◽  
Carbon Sphere

The hydrothermal method, using the template is a conspicuous way to change the morphology of the product, so it is used widely in many reports. The effect of temperature on morphology of NiCo2S4 by hydrothermal synthesis and its electrochemical properties is distinct as high-performance electrode materials for supercapacitors. With the help of the template (carbon sphere), different morphologies of NiCo2S4 under 90[Formula: see text]C, 120[Formula: see text]C and 180[Formula: see text]C were obtained. They have different properties after electrochemical analysis. In order to build a hierarchical multi-level structure, two-step vulcanization was carried out at each temperature, resulting in the difference in the morphology and performance of the six sample of electrodes. The obtained NiCo2S4 electrodes exhibit 1000[Formula: see text]F[Formula: see text]g[Formula: see text] at the current density of 1[Formula: see text]A[Formula: see text]g[Formula: see text] in the second-step of the hydrothermal process under 120[Formula: see text]C, which is superior to the microblocks NiCo2S4 electrode (90[Formula: see text]C, 888[Formula: see text]F[Formula: see text]g[Formula: see text] at the current density of 1[Formula: see text]A[Formula: see text]g[Formula: see text]) and microparticles NiCo2S4 electrode (180[Formula: see text]C, 574[Formula: see text]F[Formula: see text]g[Formula: see text] at the same current density) in the second-step hydrothermal, which shows a high-rate capability (640[Formula: see text]F[Formula: see text]g[Formula: see text] at 20[Formula: see text]A[Formula: see text]g[Formula: see text]). The obtained nanoparticles NiCo2S4 under 180[Formula: see text]C in the first-step hydrothermal electrode had an excellent cycle retention rate (89.7%), although its specific capacitance was lower. At the same time, the specific capacitance of these sample electrodes obtained in the second-step hydrothermal process is superior to those from the first-step. It was mainly attributed to the fact that temperature can influence the morphology by controlling ion exchange. And our experiment aims to use the hydrothermal method and the template method to find a more suitable temperature range to provide more ideas.

Investigation on Line-Shape Control Technology

2012 ◽  
Vol 166-169 ◽  
pp. 956-959
Author(s):  
Guang Cai Yan ◽  
Zhao Xia Ma
Keyword(s):  
Line Shape ◽  
Shape Control ◽  
Simulation Analysis ◽  
Internal Force ◽  
Effect Of Temperature ◽  
Main Beam ◽  
Control Technology ◽  
Entire Line ◽  
On Line ◽  
Cantilever Construction

The simulation analysis of the cantilever construction process was carried out with the structure analysis software. This paper provides an overview of the geometric control and the overall computation according to actual criterion, taking into account the effect of temperature, concrete shrinkage and creep, pre-stressed tension and so on. The elevation monitoring was carried out by comparing the calculated values with testing data. The analysis and control of the line shape are good to perfect the construction control technology of the closure section, enhance the closure quality and ensure the smooth of entire line shape and the rationality of the main beam internal force.

scholarly journals The rapid size- and shape-controlled continuous hydrothermal synthesis of metal sulphide nanomaterials

Nanoscale ◽  
2014 ◽  
Vol 6 (4) ◽  
pp. 2406-2418 ◽  
Author(s):  
Peter W. Dunne ◽  
Chris L. Starkey ◽  
Miquel Gimeno-Fabra ◽  
Edward H. Lester
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Shape Control ◽  
Metal Sulphide ◽  
Size And Shape ◽  
Wide Range ◽  
Shape Controlled

A continuous hydrothermal method has been applied to the synthesis of a wide range of metal sulphide nanomaterials with size and shape control.

The Effect of Temperature and Time on the Formation of TiO2 (B) Nanowires via Hydrothermal Method

2018 ◽  
Vol 280 ◽  
pp. 15-20
Author(s):  
Thida San Nwe ◽  
Matthana Khangkhamano ◽  
Lek Sikong ◽  
Kalayanee Kooptanond
Keyword(s):  
Phase Composition ◽  
Reaction Time ◽  
Hydrothermal Synthesis ◽  
Effect Of Temperature ◽  
Phase Identification ◽  
X Ray Diffraction ◽  
Hydrothermal Temperature ◽  
X Ray ◽  
Higher Temperature ◽  
Scanning Electron

TiO2(B) nanowires were prepared at 170 °C, 200 °C and 220 °C for 24 h via hydrothermal synthesis to evaluate the effect of temperature on phase composition and morphologies. The effect of reaction time: 24 and 72 h on the formation was also studied at 170 °C. All samples were calcined in air at 400 °C for 2 h. Phase identification was performed using X-ray diffraction (XRD) and morphologies was examined by a scanning electron microscope (SEM). It was found that hydrothermal temperature and time played an important role in defining TiO2phase composition and its morphology. For 24 h hydrothermal synthesis, at low temperature of 170 °C, anatase TiO2nanoparticles were formed, while at higher temperature of 200 and 220 °C, TiO2(B) nanowires with averaged diameter of 49 nm and several micrometers in length were produced. Interestingly at 170 °C, by increasing reaction time to 72 h, anatase TiO2nanoparticles were completely transformed to TiO2(B) nanowires with averaged diameter of 74 nm and 2-4 micrometers in length.

Effect of Temperature and KOH Concentration on Hydrothermal Synthesis of SrTiO3 Dendrites

2012 ◽  
Vol 430-432 ◽  
pp. 225-228
Author(s):  
Lin Lin Yang ◽  
Yu Jiang Wang ◽  
Qi Qun Zou ◽  
Yong Gang Wang
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Effect Of Temperature ◽  
Morphology Evolution

SrTiO3dendrites were successfully synthesized by hydrothermal method. An obvious morphology evolution from cubic-like shape to dendrite was observed when KOH concentration varied from 1M to 0.1M at 80°C. A decrease in KOH concentration was found to be favorable for the formation of dendrites. Star-like shape SrTiO3crystals instead of dendrites were obtained when the temperature was lowed to 40°C.

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