ChemInform Abstract: Hydrothermal Synthesis of Molecular Sieve Fibers: Using Microemulsions to Control Crystal Morphology.

ChemInform ◽  
2010 ◽  
Vol 33 (21) ◽  
pp. no-no
Author(s):  
Matthew Z. Yates ◽  
Kevin C. Ott ◽  
Eva R. Birnbaum ◽  
T. Mark McCleskey
Keyword(s):  
Hydrothermal Synthesis ◽  
Molecular Sieve ◽  
Crystal Morphology

Hydrothermal Synthesis of Molecular Sieve Fibers: Using Microemulsions To Control Crystal Morphology

2002 ◽  
Vol 114 (3) ◽  
pp. 494-496 ◽  
Author(s):  
Matthew Z. Yates ◽  
Kevin C. Ott ◽  
Eva R. Birnbaum ◽  
T. Mark McCleskey
Keyword(s):  
Hydrothermal Synthesis ◽  
Molecular Sieve ◽  
Crystal Morphology

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.

Progress in Synthesis of Micro- and Mesoporous Composite Molecular Sieve

2011 ◽  
Vol 396-398 ◽  
pp. 1151-1156
Author(s):  
Wen Yuan Wu ◽  
Chun Wei Shi ◽  
Xue Bian
Keyword(s):  
Hydrothermal Synthesis ◽  
Microwave Radiation ◽  
Vapor Phase ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Vapor Phase Transport ◽  
Mesoporous Composite ◽  
Composite Molecular Sieve ◽  
Potential Applications ◽  
Phase Transport

Micro- and mesoporous composite molecular sieves enable to achieve grades distribution of pore sizes and appropriate collocation of acidity,which have potential applications in catalysis and adsorption of large molecules.This review focus on some of the most recent results during the last decades.The techniques applied to synthesize different micro-mesoporous composite molecular sieves includes single template, dual template, crystallization of mesoporous walls, alkaline desilication, vapor-phase transport synthesis,and microwave radiation hydrothermal synthesis.

Hydrothermal Synthesis of MgBO2(OH) Nanomaterials

2011 ◽  
Vol 268-270 ◽  
pp. 195-199
Author(s):  
Guo Sheng Wang ◽  
Kang Jun Wang ◽  
Jia Hou ◽  
Hong Yan Sun ◽  
Ying Ming Wang
Keyword(s):  
Hydrothermal Synthesis ◽  
Crystal Morphology ◽  
Magnesium Nitrate ◽  
Nitrate Hexahydrate ◽  
Temperature Reaction ◽  
Hydrothermal Route ◽  
Magnesium Borate ◽  
Reaction Condition ◽  
Magnesium Nitrate Hexahydrate ◽  
Composition Structure

Magnesium borate hydroxide (MgBO2(OH) ) were synthesized using magnesium nitrate hexahydrate(MgNO3.6H2O) and borax decahydrate(Na2B4O7.10H2O) by hydrothermal route. Effect of reaction temperature , reaction time and water's volume on the composition , structure , and crystal morphology of the products were investigated, and the products were characterized by XRD and SEM. The results indicated that all of the products were szaibelyite with the reaction condition investigated, and crystal morphology could be tailored via varying the reaction condition.

Hydrothermal Synthesis of Structure- and Shape-Controlled Manganese Oxide Octahedral Molecular Sieve Nanomaterials

2006 ◽  
Vol 16 (9) ◽  
pp. 1247-1253 ◽  
Author(s):  
W.-N. Li ◽  
J. Yuan ◽  
X.-F. Shen ◽  
S. Gomez-Mower ◽  
L.-P. Xu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Manganese Oxide ◽  
Molecular Sieve ◽  
Shape Controlled

Mild hydrothermal synthesis and crystal morphology control of LiFePO4by lithium nitrate

2017 ◽  
Vol 11 ◽  
pp. 82-87 ◽  
Author(s):  
R. Martins ◽  
R. Gonçalves ◽  
C.M. Costa ◽  
S. Ferdov ◽  
S. Lanceros-Méndez
Keyword(s):  
Hydrothermal Synthesis ◽  
Crystal Morphology ◽  
Morphology Control ◽  
Lithium Nitrate

Hydrothermal synthesis and photoluminescence properties of Ca9Eu(PO4)7 nanophosphors

CrystEngComm ◽  
2015 ◽  
Vol 17 (41) ◽  
pp. 7888-7895 ◽  
Author(s):  
Jiacheng Sun ◽  
Xiaoyun Mi ◽  
Lijian Lei ◽  
Xiaoying Pan ◽  
Shuyi Chen ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Crucial Role ◽  
Crystal Morphology ◽  
Ph Value ◽  
Photoluminescence Properties

During hydrothermal synthesis, the pH value plays a crucial role in the formation of crystal morphology.

Incorporation of Differently Substituted Phthalocyanines into the Mesoporous Molecular Sieve Si-MCM-41

1999 ◽  
Vol 03 (04) ◽  
pp. 299-309 ◽  
Author(s):  
MATTHIAS GANSCHOW ◽  
DIETER WÖHRLE ◽  
GÜNTER SCHULZ-EKLOFF
Keyword(s):  
Composite Material ◽  
Hydrothermal Synthesis ◽  
Molecular Sieve ◽  
Average Distance ◽  
Hydrolytic Degradation ◽  
Mesoporous Molecular Sieve ◽  
Dye Molecules ◽  
Cetyltrimethylammonium Chloride ◽  
Surfactant Micelle ◽  
Mcm 41

Substituted phthalocyanine Zn complexes exhibiting negative, positive or no charge are incorporated in the mesopores of Si -MCM-41 materials during hydrothermal synthesis in the presence of cetyltrimethylammonium chloride. The nature of the intermolecular interaction between the surfactant micelle and the capped chromophores determines (i) the resistance of the dye towards hydrolytic degradation during the synthesis and (ii) its stability of anchoring towards extraction with ethanol in the composite material. Loadings up to 2 × 10−5 mol/g molecular sieve are achieved, corresponding to an average distance between the encapsulated dye molecules between 2 and 3 nm. The UV-vis spectra reveal the non-aggregated state of the chromophores, pointing to a uniform distribution and a perfect separation by the surfactant molecules.

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