scholarly journals Microwave Hydrothermal Synthesis and Acidity of Nanosize Gallosilicate Mesoporous Molecular Sieves

2011 ◽  
Vol 58 (2) ◽  
pp. 155-162
Author(s):  
Chi-Feng Cheng ◽  
Shih-Miao Liu ◽  
Hsu-Hsuan Cheng ◽  
Marina G. Yao ◽  
Shang Bin Liu
Keyword(s):  
Hydrothermal Synthesis ◽  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Microwave Hydrothermal

Microwave Hydrothermal Synthesis of Bimetallic (Ti-V) Ions Modified MCM-41 for Epoxidation of Styrene

2010 ◽  
Vol 1279 ◽  
Author(s):  
Yajie Guo ◽  
Guangjian Wang ◽  
Yuran Wang ◽  
Zhengwang Li ◽  
Guangqing Liu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Synthesis ◽  
Molecular Sieves ◽  
Magic Angle Spinning ◽  
Mesoporous Molecular Sieves ◽  
Magic Angle ◽  
X Ray ◽  
Microwave Hydrothermal ◽  
Hexagonal Arrangement ◽  
Mcm 41

AbstractMesoporous molecular sieves MCM-41 modified by single (Ti) and bimetal (Ti-V) ions with highly ordered hexagonal arrangement of their cylindrical channels were prepared by direct synthesis under microwave–hydrothermal (M–H) conditions at 403K. Characterizations with powder X-ray diffraction (XRD), 29Si magic-angle spinning (MAS) NMR, N2 adsorption–desorption, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelcctron spectra(XPS) and transmission electron microscopy (TEM) showed that Ti and V ions were introduced into MCM-41 under M-H conditions and Ti/V-Si bond was formed. Results revealed that all the samples were of a typical hexagonal arrangement of mesoporous structure. The modified materials were high active and selective in the epoxidation of styrene at 343 K in comparison with single-functional MCM-41. Moreover, compared to conventional method, the presented microwave hydrothermal synthesis of molecular sieves greatly improved the selectivity to styrene oxide, e.g., it reached 58.6% at styrene conversion of 18.7% over Ti-V-MCM-41 (50).

Microwave hydrothermal synthesis and catalytic cracking of polyethylene of microporous-mesoporous molecular sieves (HY/SBA-15)

2020 ◽  
Vol 258 ◽  
pp. 126805 ◽  
Author(s):  
Chunwei Shi ◽  
Yang Fu ◽  
Wenyi Chen ◽  
Honglei Shi ◽  
Yufeng Cong ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Molecular Sieves ◽  
Catalytic Cracking ◽  
Mesoporous Molecular Sieves ◽  
Microwave Hydrothermal

Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

2014 ◽  
Vol 8 (1) ◽  
pp. 95-103 ◽  
Author(s):  
Shengping Wang ◽  
Changqing Ma ◽  
Yun Shi ◽  
Xinbin Ma
Keyword(s):  
Hydrothermal Synthesis ◽  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Mcm 41

Characterization and fluorine-free microwave hydrothermal synthesis of AlPO4-5 molecular sieves as adsorbents

2016 ◽  
Vol 24 (2) ◽  
pp. 315-325 ◽  
Author(s):  
Yutang Fang ◽  
Xueqing Li ◽  
Xianghui Liang ◽  
Shuangfeng Wang ◽  
Xuenong Gao ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Molecular Sieves ◽  
Microwave Hydrothermal

Microwave-hydrothermal synthesis of CuO nanorods and their catalytic applications in sodium humate synthesis and RhB degradation

2014 ◽  
Vol 40 (3) ◽  
pp. 5103-5106 ◽  
Author(s):  
Longjiao Shi ◽  
Chao Yang ◽  
Xintai Su ◽  
Jide Wang ◽  
Feng Xiao ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Sodium Humate ◽  
Microwave Hydrothermal ◽  
Catalytic Applications ◽  
Cuo Nanorods
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