scholarly journals Techniques of Preparation of Thin Films: Catalytic Combustion

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1530
Author(s):  
Marius Stoian ◽  
Thomas Maurer ◽  
Salim Lamri ◽  
Ioana Fechete
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Catalytic Activity ◽  
Catalytic Combustion ◽  
Large Scale ◽  
High Catalytic Activity ◽  
Oxidation Reactions ◽  
Structured Catalysts ◽  
Thin Film Catalysts ◽  
Environmentally Friendly Process

Over the past several decades, an increasing amount of attention has been given to catalytic combustion as an environmentally friendly process. However, major impediments to large-scale application still arise on the materials side. Here, we review catalytic combustion on thin film catalysts in view of highlighting some interesting features. Catalytic films open the way for new designs of structured catalysts and the construction of catalysts for catalytic combustion. A special place is occupied by materials in the form of very thin films that reveal catalytic activity for various chemical reactions. In this review, we demonstrate the high catalytic activity of thin film catalysts in these oxidation reactions.

scholarly journals Microfluidic electrochemical cell for in situ structural characterization of amorphous thin-film catalysts using high-energy X-ray scattering

2019 ◽  
Vol 26 (5) ◽  
pp. 1600-1611 ◽  
Author(s):  
Gihan Kwon ◽  
Yeong-Ho Cho ◽  
Ki-Bum Kim ◽  
Jonathan D. Emery ◽  
In Soo Kim ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrochemical Cell ◽  
Porous Electrode ◽  
High Energy ◽  
Porous Electrodes ◽  
X Ray ◽  
Pdf Analysis ◽  
Thin Film Catalysts

Porous, high-surface-area electrode architectures are described that allow structural characterization of interfacial amorphous thin films with high spatial resolution under device-relevant functional electrochemical conditions using high-energy X-ray (>50 keV) scattering and pair distribution function (PDF) analysis. Porous electrodes were fabricated from glass-capillary array membranes coated with conformal transparent conductive oxide layers, consisting of either a 40 nm–50 nm crystalline indium tin oxide or a 100 nm–150 nm-thick amorphous indium zinc oxide deposited by atomic layer deposition. These porous electrodes solve the problem of insufficient interaction volumes for catalyst thin films in two-dimensional working electrode designs and provide sufficiently low scattering backgrounds to enable high-resolution signal collection from interfacial thin-film catalysts. For example, PDF measurements were readily obtained with 0.2 Å spatial resolution for amorphous cobalt oxide films with thicknesses down to 60 nm when deposited on a porous electrode with 40 µm-diameter pores. This level of resolution resolves the cobaltate domain size and structure, the presence of defect sites assigned to the domain edges, and the changes in fine structure upon redox state change that are relevant to quantitative structure–function modeling. The results suggest the opportunity to leverage the porous, electrode architectures for PDF analysis of nanometre-scale surface-supported molecular catalysts. In addition, a compact 3D-printed electrochemical cell in a three-electrode configuration is described which is designed to allow for simultaneous X-ray transmission and electrolyte flow through the porous working electrode.

Study on the Photocatalytic Properties of Nano-CdS Crack-Free Thin Films for Removal of Rhodamine B

2012 ◽  
Vol 468-471 ◽  
pp. 1017-1021 ◽  
Author(s):  
Ai Miao Qin ◽  
Hai Nian Chen ◽  
Kun Peng Jiang ◽  
Lei Liao ◽  
Wei Ping Yu ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Ultraviolet Light ◽  
Exposure Time ◽  
Rhodamine B ◽  
X Ray Diffraction ◽  
Conductive Glass ◽  
Cds Thin Film ◽  
Ultraviolet Light Irradiation ◽  
Thin Film Catalysts

Nano-CdS crack-free thin films were deposited on the conductive glass substrate with a two-electrodes DC electrochemical deposited method at low temperature (<100°C). The structure and properties of thin film catalysts were characterized by X-ray diffraction (XRD), SEM and AFM. Photocatalytic reactivities of nano-CdS thin film were conducted for removal of Rhodamine B (RB) in aqueous solution under ultraviolet light irradiation. The effect of the concentration and pH of the RB solution, the ultraviolet light, the exposure time, the size and the reusability of thin films on the degradation of RB were studied. It was found out that the exposure time, the light wavelength, the pH of RB solution and thin film’s size have much influence on the degradation. Reusability experiments show that the catalyst has well recycle characterization.

Rapid and large-scale synthesis of Co3O4 octahedron particles with very high catalytic activity, good supercapacitance and unique magnetic properties

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 104991-105002 ◽  
Author(s):  
Mahabubur Chowdhury ◽  
Oghenochuko Oputu ◽  
Mesfin Kebede ◽  
Franscious Cummings ◽  
Oscar Cespedes ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Catalytic Activity ◽  
Large Scale ◽  
High Catalytic Activity ◽  
Large Scale Synthesis ◽  
Very High

Octahedron Co3O4 particles with very high catalytic activity, good supercapacitance, and unique magnetic properties.

scholarly journals Facile synthesis of biomass-based carbon materials nano-Ni-based catalysts and its application in selective hydrogenation of alkynes

2021 ◽  
Author(s):  
Jianguo liu ◽  
Jiangmin Sun ◽  
Longlong Ma
Keyword(s):  
Catalytic Activity ◽  
Selective Hydrogenation ◽  
Carbon Material ◽  
Large Scale ◽  
High Efficiency ◽  
Environmentally Friendly ◽  
Metal Catalyst ◽  
High Catalytic Activity ◽  
Chemical Research ◽  
Nickel Metal

The development of high efficiency, excellent selectivity, and super activity metal catalyst for chemical selective hydrogenation of alkynes to olefin is of great significance in the field of the chemical industry. At the same time, the development of a large number of available base metal catalysts for organic conversion remains an important objective of chemical research. Herein, we report a facile preparation of a simple, high catalytic activity, environmentally friendly, and inexpensive biomass carbon material supported nano-nickel catalyst from lignin residue. The entire preparation process of the catalyst is simple, reliable, economical, and environmentally friendly, which provides a potential utilization prospect for large-scale industrial applications of biomass-based carbon material catalysts. Biomass-based lignin residues can not only reduce the high oxidation state of nickel ions into nickel nanoparticles by the in-situ reducing gas generated during the calcination process, but the mesoporous structure of lignin residue also promotes the adsorption of nickel metal, which greatly improved the catalytic activity of biomass-based Ni-based catalysts. The simple synthetic green, cost-effective and sustainable biomass-based Ni-based catalyst shows good performance in the selective hydrogenation of phenylacetylene, reaching 97.2% conversion and 84.3% styrene selectivity, respectively.

scholarly journals Conversion of WO3 thin films into self-crosslinked nanorods for large-scale ultraviolet detection

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14147-14153 ◽  
Author(s):  
Youngho Kim ◽  
Sang Hoon Lee ◽  
Seyoung Jeong ◽  
Bum Jun Kim ◽  
Jae-Young Choi ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Large Scale ◽  
High Density ◽  
Large Area ◽  
High Quality ◽  
Ultraviolet Detection ◽  
Heat Treated ◽  
Wo3 Thin Films

We heat-treated an amorphous large-area WO3 thin film to synthesize high-density, high-quality WO3 nanorods.

scholarly journals Tailor-made preparation of Co–C, Co–B, and Co catalytic thin films using magnetron sputtering: insights into structure–composition and activation effects for catalyzed NaBH4 hydrolysis

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 108611-108620 ◽  
Author(s):  
M. Paladini ◽  
V. Godinho ◽  
G. M. Arzac ◽  
M. C. Jiménez de Haro ◽  
A. M. Beltrán ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetron Sputtering ◽  
Sodium Borohydride ◽  
Thin Film Catalysts

The magnetron sputtering (MS) methodology is a powerful tool for tailor-made fabrication of Co-based thin film catalysts with controlled microstructures and compositions for sodium borohydride (SBH) hydrolysis.

SELF-ASSEMBLY FABRICATION OF GRAPHENE-BASED MATERIALS WITH OPTICAL–ELECTRONIC, TRANSIENT OPTICAL AND ELECTROCHEMICAL PROPERTIES

2012 ◽  
Vol 11 (06) ◽  
pp. 1240032 ◽  
Author(s):  
JIAYI ZHU ◽  
JUNHUI HE
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Self Assembly ◽  
Large Scale ◽  
Building Blocks ◽  
Precipitation Method ◽  
Hybrid Thin Film ◽  
Lbl Assembly ◽  
Metal Metal ◽  
Oppositely Charged

Directed self-assembly of nano or microsized materials as building blocks is a very exciting research topic to construct large-scale but still uniform 2D or 3D architectures. Graphene shows great potential as an advanced building block for fabricating varied graphene-based functional films or architectures together with other metal, metal oxide and semiconductor nanomaterials. In our work, we demonstrated an approach to fabrication of flexible, transparent conductive thin films via layer-by-layer (LbL) assembly of oppositely charged reduced graphene oxides (RGOs). The graphene thin films showed remarkable optical–electronic properties. Inspired by this, we further fabricated transparent conductive hybrid thin film via LbL assembly of oppositely charged RGO nanosheets and Pt nanoparticles. The graphene– Pt hybrid thin film showed transient optical property as well as appropriate conductive and wetting properties. Moreover, we demonstrated graphene wrapped- MnO2 (GW- MnO2 ) nanocomposites by self-assembly of honeycomb MnO2 nanospheres and graphene sheets via an electrostatic co-precipitation method. The hybrid materials had a good electrochemical performance.

scholarly journals Electronically Pure Single Chirality Semiconducting Single-Walled Carbon Nanotube for Large Scale Electronic Devices

MRS Advances ◽  
2017 ◽  
Vol 2 (02) ◽  
pp. 83-88
Author(s):  
Huaping Li
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Carbon Nanotube ◽  
Large Scale ◽  
Solution Process ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Schottky Type ◽  
P Type ◽  
Metallic Impurities

Abstract Carbon nanotube thin film transistors (TFTs) with characteristics resembling those of TFTs constructed on amorphous silicon, low-temperature polycrystalline silicon and metal oxides were fabricated on (6,5) single chirality single-walled carbon nanotube (SWCNT) thin film deposited from electronically pure semiconducting (6,5) single chirality single-walled carbon nanotube (SWCNT) ink. This ink was extracted in industrial scale from raw SWCNTs produced using high pressure carbon monoxide conversion, and deposited on pretreated substrates to form uniform and consistent (6,5) HiPCO SWCNT thin film using solution process. The (6,5) HiPCO SWCNT thin films were characterized as pure semiconductor without metallic impurities showing classic nonlinear current-bias curves in Schottky-type diodes. Both N-type and P-type (6,5) HiPCO SWCNT TFTs were fabricated with femto Ampere off-current and ION/IOFF ratio of 108 by depositing SiNx and HfO2 dielectrics on the top of (6,5) HiPCO SWCNT thin films, respectively. The (6,5) HiPCO SWCNT inverter with voltage gain of 52 was also demonstrated by wire-bonding one P-type HiPCO SWCNT TFT to one N-type HiPCO SWCNT TFT.

Manganese oxide films with controlled oxidation state for water splitting devices through a combination of atomic layer deposition and post-deposition annealing

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 98337-98343 ◽  
Author(s):  
Felix Mattelaer ◽  
Tom Bosserez ◽  
Jan Rongé ◽  
Johan A. Martens ◽  
Jolien Dendooven ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Atomic Layer Deposition ◽  
Manganese Oxide ◽  
Atomic Layer ◽  
Post Deposition Annealing ◽  
Solar Hydrogen ◽  
Layer Deposition ◽  
Thin Film Catalysts ◽  
Post Deposition

Manganese oxide thin films were obtained by a combination of atomic layer deposition and post-deposition annealing, and the viability of these thin films as thin film catalysts for solar hydrogen devices has been demonstrated.

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