Supercritical hydrothermal synthesis of MoS2 nanosheets with controllable layer number and phase structure

2020 ◽  
Vol 49 (27) ◽  
pp. 9377-9384
Author(s):  
Yuki Takahashi ◽  
Yuta Nakayasu ◽  
Kazuyuki Iwase ◽  
Hiroaki Kobayashi ◽  
Itaru Honma
Keyword(s):  
Hydrothermal Synthesis ◽  
Phase Structure ◽  
Reaction Times ◽  
Organic Substances ◽  
Hydrothermal Processing ◽  
Mos2 Nanosheets ◽  
Layer Number ◽  
Number Of Layers ◽  
Supercritical Hydrothermal Synthesis ◽  
Controllable Layer

Supercritical hydrothermal processing with different organic substances for different reaction times provides MoS2 with a controllable number of layers and morphology.

Supercritical Hydrothermal Synthesis of Ultra-Fine Copper Particles Using Different Precursors

2017 ◽  
Vol 744 ◽  
pp. 493-497 ◽  
Author(s):  
Pan Pan Sun ◽  
Shu Zhong Wang ◽  
Yan Hui Li ◽  
Tuo Zhang
Keyword(s):  
Hydrothermal Synthesis ◽  
Supercritical Water ◽  
Fine Particles ◽  
Copper Ions ◽  
Synthesis Method ◽  
Reaction Times ◽  
Copper Particles ◽  
Supercritical Hydrothermal Synthesis ◽  
Ultra Fine Particles ◽  
Fine Copper

Supercritical hydrothermal synthesis is a green synthesis method for metal and metal oxide ultra-fine particles. Ultra-fine copper particles are of great interests for the researchers because of the excellent performance in recent years. In this paper, supercritical hydrothermal synthesis of copper ultra-fine particles with three different precursors (CuSO4, Cu(NO3)2, Cu(HCOO)2) are reported. This thesis reports that different products are produced with different precursors. Also, three kinds of reaction mechanisms with different precursors in supercritical water were explained. The conversion of copper ions in the reaction of Cu(HCOO)2 in supercritical water is the highest, the value reaches 100.0%. In the process of synthesizing ultra-fine copper particles, different additional HCOOH concentrations (0, 0.1 mol/L, 0.2 mol/L) and different reaction times (5 mins, 10 mins) were applied. Zero-valent ultra-fine copper particles without impurity were synthesized. The synthesized copper ultra-fine particles were cubic aggregations with micro-meter size

scholarly journals Microwave-Assisted vs. Conventional Hydrothermal Synthesis of MoS2 Nanosheets: Application towards Hydrogen Evolution Reaction

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1040 ◽  
Author(s):  
Getachew Solomon ◽  
Raffaello Mazzaro ◽  
Vittorio Morandi ◽  
Isabella Concina ◽  
Alberto Vomiero
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Crystal Morphology ◽  
Synthesis Method ◽  
Synthesis Methods ◽  
Mos2 Nanosheets ◽  
Microwave Assisted

Molybdenum sulfide (MoS2) has emerged as a promising catalyst for hydrogen evolution applications. The synthesis method mainly employed is a conventional hydrothermal method. This method requires a longer time compared to other methods such as microwave synthesis methods. There is a lack of comparison of the two synthesis methods in terms of crystal morphology and its electrochemical activities. In this work, MoS2 nanosheets are synthesized using both hydrothermal (HT-MoS2) and advanced microwave methods (MW-MoS2), their crystal morphology, and catalytical efficiency towards hydrogen evolution reaction (HER) were compared. MoS2 nanosheet is obtained using microwave-assisted synthesis in a very short time (30 min) compared to the 24 h hydrothermal synthesis method. Both methods produce thin and aggregated nanosheets. However, the nanosheets synthesized by the microwave method have a less crumpled structure and smoother edges compared to the hydrothermal method. The as-prepared nanosheets are tested and used as a catalyst for hydrogen evolution results in nearly similar electrocatalytic performance. Experimental results showed that: HT-MoS2 displays a current density of 10 mA/cm2 at overpotential (−280 mV) compared to MW-MoS2 which requires −320 mV to produce a similar current density, suggesting that the HT-MoS2 more active towards hydrogen evolutions reaction.

Supercritical hydrothermal synthesis of zeolites from coal fly ash for mercury removal from coal derived gas

2015 ◽  
Vol 136 ◽  
pp. 96-105 ◽  
Author(s):  
Jiancheng Wang ◽  
Dekui Li ◽  
Fenglong Ju ◽  
Lina Han ◽  
Liping Chang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Hydrothermal Synthesis ◽  
Coal Fly Ash ◽  
Mercury Removal ◽  
Supercritical Hydrothermal Synthesis

Supercritical Hydrothermal Synthesis of Nanoparticles

2004 ◽  
Vol 2004 (0) ◽  
pp. 225-230
Author(s):  
Seiichi TAKAMI ◽  
Satoshi OHARA ◽  
Mitsuo UMETSU ◽  
Takao TSUKADA ◽  
Tadafumi ADSCHIRI
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis Of Nanoparticles ◽  
Supercritical Hydrothermal Synthesis

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 pot hydrothermal synthesis of graphene like MoS2 nanosheets for application in high performance lithium ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (71) ◽  
pp. 57666-57670 ◽  
Author(s):  
Chandrasekar Perumal Veeramalai ◽  
Fushan Li ◽  
Hongyuan Xu ◽  
Tae Whan Kim ◽  
Tailiang Guo
Keyword(s):  
Hydrothermal Synthesis ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Li Ion Battery ◽  
Mos2 Nanosheets ◽  
Excellent Performance ◽  
One Pot ◽  
Li Ion ◽  
Battery Anode

The excellent performance of hydrothermally synthesized MoS2 few layer nanosheets as a Li-ion battery anode material is demonstrated.

Supercritical hydrothermal synthesis, thermal, spectroscopic and magnetic studies of two new polymorphs of Mn(SeO3)

2005 ◽  
pp. 1727-1733 ◽  
Author(s):  
Aitor Larrañaga ◽  
José L. Mesa ◽  
José L. Pizarro ◽  
L. Lezama ◽  
Jon P. Chapman ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Magnetic Studies ◽  
Supercritical Hydrothermal Synthesis
Sign in / Sign up

Export Citation Format

Share Document