Synthesis of high-Si hierarchical beta zeolites without mesoporogen and their catalytic application in the methanol to propene reaction

2018 ◽  
Vol 8 (11) ◽  
pp. 2966-2974 ◽  
Author(s):  
Xuebin Zhao ◽  
Linying Wang ◽  
Peng Guo ◽  
Nana Yan ◽  
Tantan Sun ◽  
...  
Keyword(s):  
Single Crystalline ◽  
Catalytic Application ◽  
Beta Zeolites ◽  
First Time ◽  
Hierarchical Beta

High-Si single-crystalline beta zeolites with intracrystal mesopores were synthesized for the first time and investigated as catalysts for the methanol to propene (MTP) reaction.

scholarly journals Single-crystalline epitaxial TiO film: A metal and superconductor, similar to Ti metal

2021 ◽  
Vol 7 (2) ◽  
pp. eabd4248
Author(s):  
Fengmiao Li ◽  
Yuting Zou ◽  
Myung-Geun Han ◽  
Kateryna Foyevtsova ◽  
Hyungki Shin ◽  
...  
Keyword(s):  
Transition Metal ◽  
Density Functional ◽  
Tight Binding ◽  
Crystal Form ◽  
Titanium Monoxide ◽  
Binding Model ◽  
Functional Theory ◽  
Single Crystalline ◽  
First Time ◽  
Lattice Matched

Titanium monoxide (TiO), an important member of the rock salt 3d transition-metal monoxides, has not been studied in the stoichiometric single-crystal form. It has been challenging to prepare stoichiometric TiO due to the highly reactive Ti2+. We adapt a closely lattice-matched MgO(001) substrate and report the successful growth of single-crystalline TiO(001) film using molecular beam epitaxy. This enables a first-time study of stoichiometric TiO thin films, showing that TiO is metal but in proximity to Mott insulating state. We observe a transition to the superconducting phase below 0.5 K close to that of Ti metal. Density functional theory (DFT) and a DFT-based tight-binding model demonstrate the extreme importance of direct Ti–Ti bonding in TiO, suggesting that similar superconductivity exists in TiO and Ti metal. Our work introduces the new concept that TiO behaves more similar to its metal counterpart, distinguishing it from other 3d transition-metal monoxides.

scholarly journals High-silica nanocrystalline Beta zeolites: efficient synthesis and catalytic application

2016 ◽  
Vol 7 (1) ◽  
pp. 102-108 ◽  
Author(s):  
Raquel Martínez-Franco ◽  
Cecilia Paris ◽  
Marta E. Martínez-Armero ◽  
Cristina Martínez ◽  
Manuel Moliner ◽  
...  
Keyword(s):  
Efficient Synthesis ◽  
High Solid ◽  
Catalytic Application ◽  
Beta Zeolites ◽  
High Silica ◽  
Synthesis Methodology ◽  
20 Nm

An efficient synthesis methodology to obtain homogeneous nanosized high-silica Beta zeolites (∼10–20 nm) with high solid yields (above 95%) using simple alkyl-substituted flexible dicationic OSDAs is described.

Synthesis of single-crystalline GeS nanoribbons for high sensitivity visible-light photodetectors

2015 ◽  
Vol 3 (31) ◽  
pp. 8074-8079 ◽  
Author(s):  
Changyong Lan ◽  
Chun Li ◽  
Yi Yin ◽  
Huayang Guo ◽  
Shuai Wang
Keyword(s):  
Visible Light ◽  
Vapor Deposition ◽  
High Performance ◽  
Incident Light ◽  
Chemical Vapor ◽  
High Sensitivity ◽  
Single Crystalline ◽  
Promising Application ◽  
Photo Detection ◽  
First Time

Single-crystalline GeS nanoribbons were synthesized by chemical vapor deposition for the first time. The nanoribbon photodetectors respond to the entire visible incident light with a response edge at around 750 nm and a high responsivity, indicating their promising application for high performance broadband visible-light photo-detection.

scholarly journals Benchmark characterization of the thermoelectric properties of individual single-crystalline CdS nanowires by a H-type sensor

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25298-25304 ◽  
Author(s):  
Haidong Wang ◽  
Dingshan Zheng ◽  
Xing Zhang ◽  
Hiroshi Takamatsu ◽  
Weida Hu
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Single Crystalline ◽  
Cds Nanowires ◽  
First Time

A precision H-type sensor method has been developed to measure the thermoelectric performance of individual single-crystalline CdS nanowires for the first time.

scholarly journals Sandwich type polyoxometalates encapsulated into the mesoporous material: synthesis, characterization and catalytic application in the selective oxidation of sulfides

RSC Advances ◽  
2018 ◽  
Vol 8 (49) ◽  
pp. 28249-28260 ◽  
Author(s):  
Elham Naseri ◽  
Roushan Khoshnavazi
Keyword(s):  
Selective Oxidation ◽  
Mesoporous Material ◽  
Room Temperature ◽  
Material Synthesis ◽  
Catalytic Activities ◽  
Oxidation Of Sulfides ◽  
Catalytic Application ◽  
Sandwich Type ◽  
First Time ◽  
Sandwich Type Polyoxometalates

The A-type sandwich POMs of [(HOSnIVOH)3(PW9O34)2]12– (P2W18Sn3) and [(OCeIVO)3(PW9O34)2]12– (P2W18Ce3) were immobilized for the first time into the porous MIL-101 MOF. Their catalytic activities were examined in the oxidation of sulfides to sulfones at room temperature.

Direct Synthesis of Silicon Nanowires using Silane and Molten Gallium

2002 ◽  
Vol 737 ◽  
Author(s):  
Shashank Sharma ◽  
Mahendra K. Sunkara ◽  
Elizabeth C. Dickey
Keyword(s):  
Silicon Nanowires ◽  
Crystalline Silicon ◽  
Direct Synthesis ◽  
Growth Direction ◽  
Single Crystalline ◽  
Gas Phase Chemistry ◽  
Transmission Electron ◽  
Phase Chemistry ◽  
First Time ◽  
Low Solubility

ABSTRACTWe report for the first time, bulk synthesis of single crystalline silicon nanowires using molten gallium pools and an activated vapor phase containing silane. The resulting silicon nanowires were single crystalline with <100> growth direction. Nanowires contained an unexpectedly thin, non-uniform oxide sheath determined using high-resolution Transmission Electron Microscopy (TEM). Nanowires were tens of nanometers in diameter and tens to hundreds of microns long. The use of activated gas phase chemistry containing solute of interest over molten metal pools of low-solubility eutectics such as gallium offer a viable route to generate nanowire systems containing abrupt compositional hetero-interfaces.

Hierarchical Beta zeolites obtained in concentrated reaction mixtures as catalysts in tetrahydropyranylation of alcohols

2020 ◽  
Vol 594 ◽  
pp. 117380 ◽  
Author(s):  
Roman Barakov ◽  
Nataliya Shcherban ◽  
Pavel Yaremov ◽  
Igor Bezverkhyy ◽  
Valentina Tsyrina ◽  
...  
Keyword(s):  
Beta Zeolites ◽  
Hierarchical Beta

Time resolved growth of membrane stabilized silver NPs and their catalytic activity

RSC Advances ◽  
2014 ◽  
Vol 4 (103) ◽  
pp. 59379-59386 ◽  
Author(s):  
Sabyasachi Patra ◽  
Debasis Sen ◽  
Ashok K. Pandey ◽  
J. Bahadur ◽  
S. Mazumder ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Growth Kinetics ◽  
Nanocomposite Membranes ◽  
Time Resolved ◽  
Catalytic Application ◽  
Silver Nps ◽  
First Time ◽  
Kinetics Of

Growth kinetics of membrane stabilized silver nanoparticles have been studied for the first time with time resolved in situ SAXS. The catalytic application of nanocomposite membranes thus formed has also been explored.

Synthesis and characterization of single-crystalline Bi2O2SiO3 nanosheets with exposed {001} facets

2017 ◽  
Vol 7 (17) ◽  
pp. 3791-3801 ◽  
Author(s):  
Shuoping Ding ◽  
Xuyang Xiong ◽  
Xiufan Liu ◽  
Yiqiu Shi ◽  
Qingqing Jiang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Bismuth Oxide ◽  
Synthesis And Characterization ◽  
Single Crystalline ◽  
One Step ◽  
First Time

Bismuth oxide silicate (Bi2O2SiO3) single-crystalline nanosheets with exposed {001} facets were synthesized for the first time via a facile one-step CTAB-assisted hydrothermal method in the presence of NaOH.

Template and surfactant free synthesis of hierarchical WO3·0.33H2O via a facile solvothermal route for photocatalytic RhB degradation

CrystEngComm ◽  
2014 ◽  
Vol 16 (27) ◽  
pp. 6107-6113 ◽  
Author(s):  
Yi Zheng ◽  
Gang Chen ◽  
Yaoguang Yu ◽  
Jingxue Sun ◽  
Yansong Zhou ◽  
...  
Keyword(s):  
Solvothermal Method ◽  
Hierarchical Structures ◽  
Controlled Synthesis ◽  
Single Crystalline ◽  
Solvothermal Route ◽  
First Time

A template- and surfactant-free solvothermal method has been successfully developed for the controlled synthesis of 3D micro-dahlia WO3·0.33H2O hierarchical structures with single-crystalline petals for the first time.

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