scholarly journals Synthesis of core–shell SAPO-34@SAPO-18 composites by the epitaxial growth method and their catalytic properties for the MTO reaction

RSC Advances ◽  
2017 ◽  
Vol 7 (86) ◽  
pp. 54866-54875 ◽  
Author(s):  
Zhiqiang Xu ◽  
Jianwen Li ◽  
Weixin Qian ◽  
Hongfang Ma ◽  
Haitao Zhang ◽  
...  
Keyword(s):  
Epitaxial Growth ◽  
Catalytic Properties ◽  
Composite Catalyst ◽  
Core Shell ◽  
Mto Reaction ◽  
Growth Method

A core/shell-structured SAPO-34@SAPO-18 composite catalyst was hydrothermally synthesized through the epitaxial growth method.

scholarly journals Electrochemical Epitaxial Growth of TiO2/CdS/PbS Nanocables

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Peng Wang ◽  
Zhongyang Zhang ◽  
Hua Wang ◽  
Tieqiang Zhang ◽  
Haining Cui ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Epitaxial Growth ◽  
Fill Factor ◽  
Lattice Mismatch ◽  
Hierarchical Structures ◽  
Core Shell ◽  
Pbs Nanoparticles ◽  
Growth Method ◽  
Liquid Phase Epitaxial Growth ◽  
Short Current Density

Electrochemical deposition as a liquid phase epitaxial growth method is widely used to fabricate different kinds of hierarchical structures. As a typical heterostructure, TiO2/PbS is widely utilized in the areas of photovoltaics and photocatalysis. Oriented TiO2 nanorod (NR) arrays can provide direct pathways for the electron transport of photoanode. However, the lattice mismatch between TiO2 NR sides and PbS is very large; PbS nanoparticles (NPs) only formed on the top of TiO2 NRs. To solve this problem, TiO2/CdS core/shell nanocables were firstly prepared electrochemically because the lattice ratio between TiO2 and CdS was 0.916; and then, PbS NPs were successfully deposited over CdS shells (the lattice ratio between CdS and PbS was 0.697) to form TiO2/CdS/PbS hierarchical heterostructures. Experimental results demonstrated that the CdS interlayer could effectively promote the growth of PbS NPs on the surface and improve the fill factor and short current density of the photoanodes.

scholarly journals Hexagonal β-Na(Y,Yb)F4 based core/shell nanorods: epitaxial growth, enhanced and tailored up-conversion emission

RSC Advances ◽  
2017 ◽  
Vol 7 (31) ◽  
pp. 19205-19210 ◽  
Author(s):  
Jing Yan ◽  
Honghu Yao ◽  
Junhao Li ◽  
Shiman He ◽  
Qili Wu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Epitaxial Growth ◽  
Upconversion Emission ◽  
Optically Active ◽  
Rare Earth Ions ◽  
Core Shell ◽  
Growth Method ◽  
One Step

Rare earth ions-doped hexagonal β-Na(Y,Yb)F4 nanorods can be coated perfectly with either optically active or inert shells to improve and/or tailor the upconversion emission through a one-step epitaxial growth method from α-phased nanoparticles.

Synthesis of ZSM-5/SAPO-34 zeolite composites from LAPONITE® and their catalytic properties in the MTO reaction

CrystEngComm ◽  
2020 ◽  
Vol 22 (37) ◽  
pp. 6182-6188
Author(s):  
Xueshuai Chen ◽  
Rongli Jiang ◽  
Huilin Hou ◽  
Zihan Zhou ◽  
Xingwen Wang
Keyword(s):  
Catalytic Properties ◽  
Secondary Growth ◽  
Mto Reaction ◽  
Growth Method

ZSM-5/SAPO-34 zeolite composites were successfully synthesized via a secondary growth method, and the SAPO-34 part of ZSM-5/SAPO-34 was synthesized from LAPONITE®.

scholarly journals Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1007
Author(s):  
Azam Ali ◽  
Mariyam Sattar ◽  
Fiaz Hussain ◽  
Muhammad Humble Khalid Tareen ◽  
Jiri Militky ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Tannic Acid ◽  
Rate Constant ◽  
Catalytic Properties ◽  
Colloidal Dispersion ◽  
Alkaline Condition ◽  
Core Shell ◽  
Average Particle ◽  
Ag Nps

The versatile one-pot green synthesis of a highly concentrated and stable colloidal dispersion of silver nanoparticles (Ag NPs) was carried out using the self-assembled tannic acid without using any other hazardous chemicals. Tannic acid (Plant-based polyphenol) was used as a reducing and stabilizing agent for silver nitrate in a mild alkaline condition. The synthesized Ag NPs were characterized for their concentration, capping, size distribution, and shape. The experimental results confirmed the successful synthesis of nearly spherical and highly concentrated (2281 ppm) Ag NPs, capped with poly-tannic acid (Ag NPs-PTA). The average particle size of Ag NPs-PTA was found to be 9.90 ± 1.60 nm. The colloidal dispersion of synthesized nanoparticles was observed to be stable for more than 15 months in the ambient environment (25 °C, 65% relative humidity). The synthesized AgNPs-PTA showed an effective antimicrobial activity against Staphylococcus Aureus (ZOI 3.0 mM) and Escherichia coli (ZOI 3.5 mM). Ag NPs-PTA also exhibited enhanced catalytic properties. It reduces 4-nitrophenol into 4-aminophenol in the presence of NaBH4 with a normalized rate constant (Knor = K/m) of 615.04 mL·s−1·mg−1. For comparison, bare Ag NPs show catalytic activity with a normalized rate constant of 139.78 mL·s−1·mg−1. Furthermore, AgNPs-PTA were stable for more than 15 months under ambient conditions. The ultra-high catalytic and good antimicrobial properties can be attributed to the fine size and good aqueous stability of Ag NPs-PTA. The unique core-shell structure and ease of synthesis render the synthesized nanoparticles superior to others, with potential for large-scale applications, especially in the field of catalysis and medical.

Synthesis of nano-ZSM-5 zeolite via a dry gel conversion crystallization process and its application in MTO reaction

CrystEngComm ◽  
2021 ◽  
Vol 23 (15) ◽  
pp. 2793-2800
Author(s):  
Xueshuai Chen ◽  
Rongli Jiang ◽  
Yu Gao ◽  
Zihan Zhou ◽  
Xingwen Wang
Keyword(s):  
Crystallization Process ◽  
Catalytic Properties ◽  
Dry Gel Conversion ◽  
Mto Reaction ◽  
Conversion Method

Nano-sized ZSM-5 with superior catalytic properties was synthesized from LAPONITE® as one of the Si sources by a dry gel conversion method.

PtPd nanoframes derived from Pd@PdPt core–shell rhombic dodecahedrals with excellent catalytic performance toward methanol oxidation

2021 ◽  
Author(s):  
Yangyang Ren ◽  
Chuanliang Li ◽  
Baosong Li ◽  
Fan Gao ◽  
Xinghua Zhang ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Core Shell ◽  
Acid Environment ◽  
Excellent Catalytic Performance

PtPd nanoframes with excellent catalytic properties were obtained by etching Pd@PdPt core–shell RDs with Fe3+ in an acid environment.

scholarly journals Epitaxial Growth of Ordered In-Plane Si and Ge Nanowires on Si (001)

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 788
Author(s):  
Jian-Huan Wang ◽  
Ting Wang ◽  
Jian-Jun Zhang
Keyword(s):  
Electron Microscopy ◽  
Epitaxial Growth ◽  
Molecular Beam ◽  
Core Shell ◽  
High Quality ◽  
Quantum Devices ◽  
Wafer Scale ◽  
Transmission Electron ◽  
Controllable Growth

Controllable growth of wafer-scale in-plane nanowires (NWs) is a prerequisite for achieving addressable and scalable NW-based quantum devices. Here, by introducing molecular beam epitaxy on patterned Si structures, we demonstrate the wafer-scale epitaxial growth of site-controlled in-plane Si, SiGe, and Ge/Si core/shell NW arrays on Si (001) substrate. The epitaxially grown Si, SiGe, and Ge/Si core/shell NW are highly homogeneous with well-defined facets. Suspended Si NWs with four {111} facets and a side width of about 25 nm are observed. Characterizations including high resolution transmission electron microscopy (HRTEM) confirm the high quality of these epitaxial NWs.

Pt-porous ZnO nanoribbon hybrid materials with enhanced catalytic performances

CrystEngComm ◽  
2015 ◽  
Vol 17 (8) ◽  
pp. 1765-1768 ◽  
Author(s):  
Zhiqiang Cheng ◽  
Mingyue Yu ◽  
Guixia Yang ◽  
Lijuan Kang
Keyword(s):  
Photocatalytic Degradation ◽  
Co Oxidation ◽  
Hybrid Materials ◽  
Catalytic Properties ◽  
Seeded Growth ◽  
Hybrid Nanomaterial ◽  
Growth Method ◽  
Catalytic Applications ◽  
Catalytic Performances

With the help of bio-molecule l-lysine, a seeded growth method has been developed and Pt–ZnO porous nanoribbons have been successfully obtained. For the catalytic applications of CO oxidation and the photocatalytic degradation of MO, the hybrid nanomaterial exhibits remarkably enhanced catalytic properties.

Epitaxial Growth of Highly Luminescent CdSe/CdS Core/Shell Nanocrystals with Photostability and Electronic Accessibility

1997 ◽  
Vol 119 (30) ◽  
pp. 7019-7029 ◽  
Author(s):  
Xiaogang Peng ◽  
Michael C. Schlamp ◽  
Andreas V. Kadavanich ◽  
A. P. Alivisatos
Keyword(s):  
Epitaxial Growth ◽  
Core Shell

Epitaxial Growth of ZSM-5@Silicalite-1: A Core–Shell Zeolite Designed with Passivated Surface Acidity

ACS Nano ◽  
2015 ◽  
Vol 9 (4) ◽  
pp. 4006-4016 ◽  
Author(s):  
Arian Ghorbanpour ◽  
Abhishek Gumidyala ◽  
Lars C. Grabow ◽  
Steven P. Crossley ◽  
Jeffrey D. Rimer
Keyword(s):  
Epitaxial Growth ◽  
Surface Acidity ◽  
Core Shell
Sign in / Sign up

Export Citation Format

Share Document