Ultra Fast Hematite Preparation using a Microwave-Assisted Hydrothermal Method

2013 ◽  
Vol 3 (4) ◽  
pp. 477-484
Author(s):  
Arnayra Silva ◽  
Jefferson Andrade ◽  
Graziela Casali ◽  
Severino Lima ◽  
Elson Longo ◽  
...  
2019 ◽  
Vol 21 (5) ◽  
Author(s):  
I. A. Garduño-Wilches ◽  
G. Alarcón-Flores ◽  
S. Carmona-Téllez ◽  
J. Guzmán ◽  
M. Aguilar-Frutis

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1040 ◽  
Author(s):  
Getachew Solomon ◽  
Raffaello Mazzaro ◽  
Vittorio Morandi ◽  
Isabella Concina ◽  
Alberto Vomiero

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.


RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34761-34768 ◽  
Author(s):  
B. Nageswara Rao ◽  
P. Ramesh Kumar ◽  
O. Padmaraj ◽  
M. Venkateswarlu ◽  
N. Satyanarayana

Porous α-Fe2O3 nanostructures were developed in the presence of a base catalyst by a rapid microwave assisted hydrothermal method.


2014 ◽  
Vol 17 (4) ◽  
pp. 933-939 ◽  
Author(s):  
Fabiana Villela da Motta ◽  
Ana Paula de Azevedo Marques ◽  
Vinícius Dantas de Araújo ◽  
Mara Tatiane de Souza Tavares ◽  
Mauricio Roberto Bomio Delmonte ◽  
...  

2014 ◽  
Vol 507 (1) ◽  
pp. 012053
Author(s):  
R G Lima ◽  
V D Rodrigues ◽  
C L Carvalho ◽  
S R Teixeira ◽  
A E Souza ◽  
...  

2018 ◽  
Vol 37 (8) ◽  
pp. 927-931 ◽  
Author(s):  
Samara Schmidt ◽  
Evaldo T. Kubaski ◽  
Diogo P. Volanti ◽  
Thiago Sequinel ◽  
Vinicius D. N. Bezzon ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document