Preliminary Study on the Synthesis of ZIF-8 Membranes via In Situ and Secondary Seeded Growth Methods

2016 ◽  
Vol 1133 ◽  
pp. 649-653 ◽  
Author(s):  
Li Sze Lai ◽  
Yin Fong Yeong ◽  
Kok Keong Lau ◽  
Mohd Shariff Azmi
Keyword(s):  
Secondary Growth ◽  
Dip Coating ◽  
Gas Permeation ◽  
In Situ Growth ◽  
Seeded Growth ◽  
Nitrogen Gas ◽  
Growth Method ◽  
Stage Synthesis ◽  
Growth Methods

In this work, synthesis of ZIF-8 membranes via in situ and secondary seeded growth methods was conducted at the preliminary stage. Synthesis durations were varied at 4 h and 36 h using in situ growth method. For secondary growth, the seeding procedure was applied through rubbing and dip-coating of the seeds on the support. The resultant membranes were characterized using X-ray diffraction (XRD) and scanning electron microscope (SEM). Subsequently, the defects of the resultant membranes were determined using nitrogen gas permeation test. The results showed that, ZIF-8 membrane synthesized using in situ growth method for 4 h exhibited highest crystallinity and lower defects with the nitrogen gas permeance of 5.09 × 10-7 mol/m2·s·Pa. Besides, in situ growth method has shown its potential in synthesizing high quality ZIF-8 membrane through an easy and faster route.

scholarly journals Study the Effect of Seeding Suspension Concentration of DD3R Particles on the Modified Surface of Α-Alumina Support for Preparing DD3R Zeolite Membrane with High Quality

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Aynaz Meshkat ◽  
Mohammad Javad Vaezi ◽  
Ali Akbar Babaluo
Keyword(s):  
Secondary Growth ◽  
Dip Coating ◽  
Sem Analysis ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
Alumina Support ◽  
Suspension Concentration ◽  
Coating Method ◽  
Growth Method ◽  
Modified Surface

In this study, seeding of DD3R particles as an important step in the synthesis of DD3R membrane with secondary growth method was investigated. Dip-coating method is used for seeding of DD3R particles on the modified surface of α-alumina supports. 0.1, 0.2 and 0.3 wt% aqueous suspensions of the DD3R seeds were prepared and each support was coated three times with dipping time of 240 s. Scanning electron microscopy (SEM) analysis was used for the investigation of the quality of seed layer formed on the support. It is shown that the uniform layer of seeds was formed with 0.2 wt% seed suspension concentration. DD3R zeolite membrane was synthesized via hydrothermal method on the support seeded with 0.2 wt% seed suspension concentration. The X-ray diffraction and SEM analysis confirmed the synthesis of uniform DD3R zeolite membrane layer on the support which can be due to the uniform distribution of the DD3R seeds. Single gas permeation tests of N2, CO2 and CH4 were carried out, so that good perm-selectivity for gas mixtures was observed.

Interfacial adhesion of nanoporous zeolite thin films

2006 ◽  
Vol 21 (2) ◽  
pp. 505-511 ◽  
Author(s):  
Lili Hu ◽  
Junlan Wang ◽  
Zijian Li ◽  
Shuang Li ◽  
Yushan Yan
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Interfacial Adhesion ◽  
Interfacial Strength ◽  
Future Generation ◽  
In Situ Growth ◽  
Seeded Growth ◽  
Si Substrates ◽  
Film Substrate

Nanoporous silica zeolite thin films are promising candidates for future generation low-dielectric constant (low-k) materials. During the integration with metal interconnects, residual stresses resulting from the packaging processes may cause the low-k thin films to fracture or delaminate from the substrates. To achieve high-quality low-k zeolite thin films, it is important to carefully evaluate their adhesion performance. In this paper, a previously reported laser spallation technique is modified to investigate the interfacial adhesion of zeolite thin film-Si substrate interfaces fabricated using three different methods: spin-on, seeded growth, and in situ growth. The experimental results reported here show that seeded growth generates films with the highest measured adhesion strength (801 ± 68 MPa), followed by the in situ growth (324 ± 17 MPa), then by the spin-on (111 ± 29 MPa). The influence of the deposition method on film–substrate adhesion is discussed. This is the first time that the interfacial strength of zeolite thin films-Si substrates has been quantitatively evaluated. This paper is of great significance for the future applications of low-k zeolite thin film materials.

In situ growth of a CaAl-NO3−-layered double hydroxide film directly on an aluminum alloy for corrosion resistance

2020 ◽  
Vol 49 (13) ◽  
pp. 3956-3964 ◽  
Author(s):  
Muhammad Ahsan Iqbal ◽  
Luyi Sun ◽  
Anna Marie LaChance ◽  
Hao Ding ◽  
Michele Fedel
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Layered Double Hydroxide ◽  
In Situ Growth ◽  
Structural Geometry ◽  
Hydroxide Film ◽  
Growth Method ◽  
Double Hydroxide ◽  
First Time

In this study, a calcium–aluminum-layered double hydroxide (CaAl-LDH) thin film was grown on an AA6082 aluminum alloy, for the very first time, by using a facile in situ growth method in an effort to investigate the CaAl-LDH structural geometry and corresponding corrosion resistance properties.

Super-hydrophobic and photocatalytic antimicrobial activity of iodine-doped ZnO nanoarray films

2022 ◽  
Author(s):  
Yingxin Xiao ◽  
Shitong Han ◽  
HaiLing Xi ◽  
Yubo JIn ◽  
Huaxiang Lin ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silicon Wafer ◽  
In Situ Growth ◽  
Structure And Morphology ◽  
Growth Method ◽  
Doped Zno

Iodine (I) doped ZnO nanoarray film (ZnO/ I-X) were prepared on silicon wafer by the in-situ growth method. The structure and morphology of the samples have been test by XRD,...

scholarly journals Modification of V2O5-WO3/TiO2 Catalyst by Loading of MnOx for Enhanced Low-Temperature NH3-SCR Performance

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1900
Author(s):  
Xianlong Zhang ◽  
Qinchao Diao ◽  
Xiaorui Hu ◽  
Xueping Wu ◽  
Kesong Xiao ◽  
...  
Keyword(s):  
Manganese Oxides ◽  
Catalytic Reduction ◽  
In Situ Growth ◽  
X Ray Diffraction ◽  
Scr Catalyst ◽  
X Ray ◽  
Nh3 Scr ◽  
Growth Method ◽  
Temperature Programmed

V2O5-WO3/TiO2 as a commercial selective catalytic reduction (SCR) catalyst usually used at middle-high temperatures was modified by loading of MnOx for the purpose of enhancing its performance at lower temperatures. Manganese oxides were loaded onto V-W/Ti monolith by the methods of impregnation (I), precipitation (P), and in-situ growth (S), respectively. SCR activity of each modified catalyst was investigated at temperatures in the range of 100–340 °C. Catalysts were characterized by specific surface area and pore size determination (BET), X-ray diffraction (XRD), temperature programmed reduction (TPR), etc. Results show that the loading of MnOx remarkably enhanced the SCR activity at a temperature lower than 280 °C. The catalyst prepared by the in-situ growth method was found to be most active for SCR.

scholarly journals In Situ Growth of a High-Performance All-Solid-State Electrode for Flexible Supercapacitors Based on a PANI/CNT/EVA Composite

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 178 ◽  
Author(s):  
Xipeng Guan ◽  
Debin Kong ◽  
Qin Huang ◽  
Lin Cao ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Power Density ◽  
High Performance ◽  
High Capacity ◽  
Wearable Electronics ◽  
In Situ Growth ◽  
Growth Method ◽  
Poly Ethylene ◽  
Areal Capacity

For the development of light, flexible, and wearable electronic devices, it is crucial to develop energy storage components combining high capacity and flexibility. Herein, an all-solid-state supercapacitor is prepared through an in situ growth method. The electrode contains polyaniline deposited on a carbon nanotube and a poly (ethylene-co-vinyl acetate) film. The hybrid electrode exhibits excellent mechanical and electrochemical performance. The optimized few-layer polyaniline wrapping layer provides a conductive network that effectively enhances the cycling stability, as 66.4% of the starting capacitance is maintained after 3000 charge/discharge cycles. Furthermore, the polyaniline (PANI)-50 displays the highest areal energy density of 83.6 mWh·cm−2, with an areal power density of 1000 mW·cm−2, and a high areal capacity of 620 mF cm−2. The assembled device delivers a high areal capacity (192.3 mF·cm−2) at the current density of 0.1 mA·cm−2, a high areal energy (26.7 mWh·cm−2) at the power density of 100 mW·cm−2, and shows no significant decrease in the performance with a bending angle of 180°. This unique flexible supercapacitor thus exhibits great potential for wearable electronics.

scholarly journals Preparation and photocatalytic activity of PET/TiO<sub>2</sub> hybrid nanofibers via in-situ growth method

2010 ◽  
Vol 55 (19) ◽  
pp. 1873-1878 ◽  
Author(s):  
明书 阳 ◽  
Feng WANG ◽  
YanFen DING ◽  
ShiMin ZHANG ◽  
ShaoRen YANG MingShu LIU ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
In Situ Growth ◽  
Hybrid Nanofibers ◽  
Growth Method
Sign in / Sign up

Export Citation Format

Share Document