scholarly journals Hydrothermal synthesis of anisotropic alkali and alkaline earth vanadates

2007 ◽  
Vol 22 (1) ◽  
pp. 5-18 ◽  
Author(s):  
Alexej Michailovski ◽  
Michael Wörle ◽  
Denis Sheptyakov ◽  
Greta R. Patzke
Keyword(s):  
Hydrothermal Synthesis ◽  
Systematic Study ◽  
Alkaline Earth ◽  
Hydrothermal Process ◽  
Vanadium Oxides ◽  
Hydrothermal Systems ◽  
Oxide Materials ◽  
Emerging Trends ◽  
One Step ◽  
Systematic Field

In the course of a systematic field study, anisotropic alkali and alkaline earth vanadates have been accessed through a straightforward, one-step hydrothermal process. They are formed quantitatively from V2O5 and alkali- or alkaline earth halide solutions after a few days of autoclave treatment in the temperature range between 100 and 220 °C. The presence of ionic additives leads to an interplay between the formation of isotropic crystalline phases and the production of fibrous oxide materials, such as a novel magnesium vanadate. The influence of the hydrothermal parameters and of the alkali/alkaline earth halides on the emerging phases and morphologies has been investigated in the course of a systematic study. The results are compared with other vanadate- and transition metal oxide-based hydrothermal systems, and the emerging trends are discussed with respect to the development of predictive synthetic concepts for nanostructured vanadium oxides.

scholarly journals One-Step Hydrothermal Synthesis of P25 @ Few Layered MoS2 Nanosheets toward Enhanced Bi-catalytic Activities: Photocatalysis and Electrocatalysis

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1636 ◽  
Author(s):  
Zhou ◽  
Zhang ◽  
Wang ◽  
Wang ◽  
Xu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Active Sites ◽  
Photocatalytic Performance ◽  
Transformation Efficiency ◽  
Hydrothermal Process ◽  
Mos2 Nanosheets ◽  
Sunlight Irradiation ◽  
Catalytic Activities ◽  
One Step ◽  
Layered Mos2

P25 loaded few layered molybdenum disulfide (MoS2) nanosheets (P25@MoS2) are successfully synthesized through a facile one-step hydrothermal process. The bi-catalytic activities, i.e., photocatalytic and electrocatalytic activities, of the as-prepared nanomaterials have been investigated. For the as-prepared products, the photocatalytic performances were investigated by degrading simulated pollutant under sunlight irradiation, and the hydrogen evolution reaction evaluated the electrocatalytic performances. The results indicate that P25@MoS2 possesses excellent activities in both photocatalysis and electrocatalysis. The presence of MoS2 broadens the light absorption range of P25 and improves the separation and transformation efficiency of photogenerated carriers, thus improving its photocatalytic performance. The existence of P25 inhibits the aggregation of MoS2 to form more dispersed MoS2 nanosheets with only few layers increasing its active sites. Thereby, the electrocatalytic performance is heightened. The excellent multifunction makes the as-prepared P25@MoS2 a promising material in the fields of environment and energy.

One-step hydrothermal synthesis of porous Ti3C2Tz MXene/rGO gels for supercapacitor applications

Nanoscale ◽  
2021 ◽  
Author(s):  
Sanjit Saha ◽  
Kailash Arole ◽  
Miladin Radovic ◽  
Jodie Lutkenhaus ◽  
Micah Green
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Synthesis ◽  
Titanium Carbide ◽  
Porous Structure ◽  
Hydrothermal Process ◽  
Average Pore ◽  
Reduced Graphene ◽  
One Step ◽  
Supercapacitor Applications ◽  
Highly Porous

Titanium carbide/reduced graphene oxide (Ti3C2Tz/rGO) gels were prepared by a one-step hydrothermal process. The gels show a highly porous structure with a surface area of ~224 m2/g and average pore...

One step hydrothermal synthesis of CeO2–ZrO2 nanocomposites and investigation of the morphological evolution

RSC Advances ◽  
2015 ◽  
Vol 5 (109) ◽  
pp. 89976-89984 ◽  
Author(s):  
Xiaohui Zhang ◽  
Qiang Wang ◽  
Jing Zhang ◽  
Jigang Wang ◽  
Ming Guo ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Morphological Evolution ◽  
Hydrothermal Process ◽  
One Step ◽  
Facile Hydrothermal Process

Uniform cauliflower-like and rough nano-spheres of CeO2–ZrO2 composites were synthesized by a facile hydrothermal process using only urea as a mineralizer without any surfactant or template.

One-step hydrothermal synthesis of a novel 3D BiFeWOx/Bi2WO6 composite with superior visible-light photocatalytic activity

2018 ◽  
Vol 20 (13) ◽  
pp. 3014-3023 ◽  
Author(s):  
Yanan Wang ◽  
Yiqing Zeng ◽  
Xuanyu Chen ◽  
Qiuyang Wang ◽  
Lina Guo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Hydrothermal Process ◽  
One Pot ◽  
Visible Light Photocatalytic Activity ◽  
One Step ◽  
Visible Light Photocatalytic

A novel 3D BiFeWOx/Bi2WO6 (BFW/BWO) composite has been synthesized via a facile one-pot hydrothermal process.

Hydrothermal Synthesis of 3D Flower-Like Bismuth Trisulphide Microcrystallines

2013 ◽  
Vol 634-638 ◽  
pp. 2207-2210 ◽  
Author(s):  
Pin Jiang Li ◽  
Yan Ge Zhang ◽  
Bao Jun Huang ◽  
Chen Yu ◽  
Ling Zhuge ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Process ◽  
X Ray Diffraction ◽  
Structure Directing Agent ◽  
X Ray ◽  
Laser Raman ◽  
One Step ◽  
Scanning Electron

3D flower-like bismuth trisulphide microcrystallines has been successfully prepared via one step hydrothermal process and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and laser Raman spectrometer techniques. The morphologies of the Bi2S3 microcrystallines were influenced by the surfactant Na2(EDTA), which acts as a structure directing agent.

Targeted Synthesis of Nanostructured Oxide Materials

2007 ◽  
Vol 1056 ◽  
Author(s):  
Greta Ricarda Patzke ◽  
Ying Zhou
Keyword(s):  
Hydrothermal Process ◽  
Kinetic Studies ◽  
Complex Oxide ◽  
Morphology Control ◽  
Oxide Materials ◽  
New Materials ◽  
Binary Oxides ◽  
Nanostructured Oxide ◽  
One Step ◽  
The One

ABSTRACTMorphology control is a key challenge in the straightforward hydrothermal production of technologically relevant anisotropic oxide materials. The use of readily available ionic additives as growth modifiers is discussed and compared for molybdenum- and tungsten oxide-based systems, and it is extended upon the formation of ternary W/Mo-oxides. Generally, the one-step hydrothermal synthesis of ternary and higher oxides is an important goal, because their properties often outperform those of the binary oxides. This holds especially for the Bi2O3-MoO3-VOx (BIMOVOx) system as a rich source of new materials. We present a new solution-based approach to α-Bi2O3 nanobelts starting from commercial Bi2O3 and K2SO4 as a key step on the way to anisotropic BIMOVOx-oxides. This hydrothermal process is an illustrative example of highly selective and efficient morphology control through an inorganic additive. As mechanistic and kinetic studies are crucial for the design of complex oxide nanomaterials, the Bi2O3-K2SO4 system is compared to our previous studies on Mo-, W- and V-oxides with respect to its hydrothermal parameter window and robustness.

One-step hydrothermal synthesis of monolayer MoS2 quantum dots for highly efficient electrocatalytic hydrogen evolution

2015 ◽  
Vol 3 (20) ◽  
pp. 10693-10697 ◽  
Author(s):  
Xianpei Ren ◽  
Liuqing Pang ◽  
Yunxia Zhang ◽  
Xiaodong Ren ◽  
Haibo Fan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Hydrothermal Synthesis ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Hydrothermal Process ◽  
Monolayer Mos2 ◽  
Highly Efficient ◽  
One Step ◽  
Facile Hydrothermal Process

Monolayer MoS2 QDs were prepared via a facile hydrothermal process and exhibited excellent catalytic activity for the hydrogen evolution reaction.

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