scholarly journals Synthesis and water oxidation electrocatalytic and electrochromic behaviours of mesoporous nickel oxide thin film electrodes

2019 ◽  
Vol 7 (38) ◽  
pp. 22012-22020 ◽  
Author(s):  
Assel Amirzhanova ◽  
Irmak Karakaya ◽  
Can Berk Uzundal ◽  
Gözde Karaoğlu ◽  
Ferdi Karadas ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Nickel Oxide ◽  
Molten Salt ◽  
Surface Area ◽  
Self Assembly ◽  
Water Oxidation ◽  
Large Surface Area ◽  
Oxide Thin Film ◽  
Assembly Method

A molten salt assisted self-assembly method has been employed to produce mesoporous nickel oxide thin films that have a large surface area, efficient water oxidation electrocatalytic performance and good electrochromic properties.

Large Surface Area of HMDS Plasma Polymerized Thin Film Used for Production of Miniaturized Structures

2010 ◽  
Vol 636-637 ◽  
pp. 1065-1072 ◽  
Author(s):  
Lilian Marques Silva ◽  
Roberto R. Lima ◽  
E.R. Fachini ◽  
E.W. Simões ◽  
E. Pecoraro ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Surface Area ◽  
Preliminary Analysis ◽  
Low Cost ◽  
Large Surface Area ◽  
Polar Organic Compounds ◽  
Organic Mixtures ◽  
Surface Areas ◽  
Good Agreement

The aim of this work was the production of a large surface area of hexamethyldisilazane (HMDS) plasma-deposited thin films and their applicability in a miniaturized structure useful for preliminary analysis of organic mixtures. The HMDS plasma films were produced with different surface areas and morphologies, and all films adsorbed polar and non-polar organic compounds. A low cost miniaturized structure was manufactured in glass using a Milling cutter and covered with HMDS plasma films. Good agreement was observed between simulation and experimental results on those microstructures. The observed different performance between pure and mixtures of organic compound samples suggests that the proposed system is a simple setup that could be useful for rough analysis of a fuel.

scholarly journals Mesoporous Composite Networks of Linked MnFe2O4 and ZnFe2O4 Nanoparticles as Efficient Photocatalysts for the Reduction of Cr(VI)

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 199
Author(s):  
Euaggelia Skliri ◽  
Ioannis Vamvasakis ◽  
Ioannis T. Papadas ◽  
Stelios A. Choulis ◽  
Gerasimos S. Armatas
Keyword(s):  
Surface Area ◽  
Self Assembly ◽  
Environmental Remediation ◽  
Performance Enhancement ◽  
Spinel Ferrite ◽  
Catalytic Efficiency ◽  
Large Surface Area ◽  
Composite Catalyst ◽  
Visible Absorption ◽  
Assembly Method

Semiconductor photocatalysis has recently emerged as an effective and eco-friendly approach that could meet the stringent requirements for sustainable environmental remediation. To this end, the fabrication of novel photocatalysts with unique electrochemical properties and high catalytic efficiency is of utmost importance and requires adequate attention. In this work, dual component mesoporous frameworks of spinel ferrite ZnFe2O4 (ZFO) and MnFe2O4 (MFO) nanoparticles are reported as efficient photocatalysts for detoxification of hexavalent chromium (Cr(VI)) and organic pollutants. The as-prepared materials, which are synthesized via a polymer-templated aggregating self-assembly method, consist of a continuous network of linked nanoparticles (ca. 6–7 nm) and exhibit large surface area (up to 91 m2 g−1) arising from interstitial voids between the nanoparticles, according to electron microscopy and N2 physisorption measurements. By tuning the composition, MFO-ZFO composite catalyst containing 6 wt.% MFO attains excellent photocatalytic Cr(VI) reduction activity in the presence of phenol. In-depth studies with UV-visible absorption, electrochemical and photoelectrochemical measurements show that the performance enhancement of this catalyst predominantly arises from the suitable band edge positions of constituent nanoparticles that efficiently separates and transports the charge carriers through the interface of the ZFO/MFO junctions. Besides, the open pore structure and large surface area of these ensembled networks also boost the reaction kinetics. The remarkable activity and durability of the MFO-ZFO heterostructures implies the great possibility of implementing these new nanocomposite catalysts into a realistic Cr(VI) detoxification of contaminated wastewater.

Synthesis and Characterization of TiO2 Thin Film by Self-Assembly Method

2011 ◽  
Vol 148-149 ◽  
pp. 1500-1503
Author(s):  
Wen Ning Mu ◽  
Shuang Zhi Shi
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Self Assembly ◽  
Film Surface ◽  
Molar Ratio ◽  
Layer By Layer ◽  
Sem Images ◽  
Thin Film Surface ◽  
Assembly Method ◽  
Average Size

TiO2 thin films were deposited on SAM-coated silicon substrate by layer-by-layer self-assembly method. The influence of various parameters was investigated to optimize the conditions and the results show that with increasing deposition temperature and deposition time, and decreasing molar ratio of HCl to TiO22+, the content of TiO22+ in the reaction solution decreases. The as-deposited thin films were fully amorphous from the result of XRD, also were homogeneous and continuous produced at 80 °C for120 min as presented in SEM images, and the average size of particles on the thin film surface is approximately 33 nm.

Sputtered Nickel Oxide Films for NO2 Gas Sensors

2013 ◽  
Vol 678 ◽  
pp. 361-364 ◽  
Author(s):  
Avula Mallikarjuna Reddy ◽  
Akepati Sivasankar Reddy ◽  
Pamanji Sreedhara Reddy
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Properties ◽  
Nickel Oxide ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Oxide Thin Film ◽  
Nickel Metal ◽  
Force Microscopy ◽  
Nio Thin Film

In recent years, lot of efforts was made to develop many types of nitrogen oxide gas sensors. Among them, most interesting are WO3, V2O5, TiO2, SnO2 and NiO thin films as gas sensing layers. Relatively small effort has been done to examine nickel oxide. But reasonably good electrical properties and stability in air make it feasible for the fabrication of nickel oxide thin film based gas sensors. Hence, in the present study NiO thin films were deposited by dc reactive magnetron sputtering technique from a nickel metal target in argon and oxygen mixed atmosphere and studied its gas sensing properties towards NO2 gas. The effect of process parameters on the morphological and electrical properties of NiO was studied by scanning electron microscopy (SEM), atomic force microscopy (AFM) and Hall effect studies respectively. The films prepared at optimum conditions showed superior electrical properties and exhibited fine and uniform grains with RMS roughness 9.4 nm. These films were tested for gas sensing characteristics of NO2 gas. The sensitivity of NiO thin film was investigated in the temperature range 373 to 573 K. The dynamic response for the NiO films was observed at an operating temperature of 473 K and gas concentration of 50 ppm for NO2 gas.

scholarly journals Synthesis of mesoporous LiMn2O4 and LiMn2−xCoxO4 thin films using the MASA approach as efficient water oxidation electrocatalysts

2018 ◽  
Vol 6 (28) ◽  
pp. 13925-13933 ◽  
Author(s):  
Fadime Mert Balci ◽  
Irmak Karakaya ◽  
Elif Pınar Alsaç ◽  
Muammer Yusuf Yaman ◽  
Gülbahar Saat ◽  
...  
Keyword(s):  
Thin Films ◽  
Molten Salt ◽  
Self Assembly ◽  
Water Oxidation ◽  
Excellent Performance ◽  
High Quality ◽  
Mesoporous Metal

The molten-salt assisted self-assembly (MASA) process is applicable to fabricate high quality mesoporous metal lithiate thin films that exhibit excellent performance as electrocatalysts for water oxidation.

Uncooled bolometer for millimeter-wave detection using manganese-cobalt-nickel-oxide thin film

2020 ◽  
Vol 13 (12) ◽  
pp. 124002
Author(s):  
Tao Hu ◽  
Wanli Ma ◽  
Jing Wu ◽  
Zhibo Zhang ◽  
Wei Zhou ◽  
...  
Keyword(s):  
Thin Film ◽  
Nickel Oxide ◽  
Millimeter Wave ◽  
Oxide Thin Film ◽  
Wave Detection ◽  
Cobalt Nickel ◽  
Cobalt Nickel Oxide ◽  
Nickel Oxide Thin Film

scholarly journals Optoelectronic properties of highly porous silver oxide thin film

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Ahmad Al-Sarraj ◽  
Khaled M. Saoud ◽  
Abdelaziz Elmel ◽  
Said Mansour ◽  
Yousef Haik
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electron Microscope ◽  
Plasma Etching ◽  
Silver Oxide ◽  
Oxidation Time ◽  
Oxide Thin Film ◽  
X Ray ◽  
Porous Silver ◽  
Highly Porous

Abstract In this paper, we report oxidation time effect on highly porous silver oxide nanowires thin films fabricated using ultrasonic spray pyrolysis and oxygen plasma etching method. The NW’s morphological, electrical, and optical properties were investigated under different plasma etching periods and the number of deposition cycles. The increase of plasma etching and oxidation time increases the surface roughness of the Ag NWs until it fused to form a porous thin film of silver oxide. AgNWs based thin films were characterized using X-ray diffraction, scanning electron microscope, transmission electron microscope, X-ray photoemission spectroscopy, and UV–Vis spectroscopy techniques. The obtained results indicate the formation of mixed mesoporous Ag2O and AgO NW thin films. The Ag2O phase of silver oxide appears after 300 s of oxidation under the same conditions, while the optical transparency of the thin film decreases as plasma etching time increases. The sheet resistance of the final film is influenced by the oxidation time and the plasma application periodicity. Graphic abstract

Pseudo n-type behaviour of nickel oxide thin film at room temperature towards ammonia sensing

2021 ◽  
Author(s):  
Kumar Haunsbhavi ◽  
Karuppiah Deva Arun Kumar ◽  
Paolo Mele ◽  
Omar M. Aldossary ◽  
Mohd Ubaidullah ◽  
...  
Keyword(s):  
Thin Film ◽  
Nickel Oxide ◽  
Room Temperature ◽  
Oxide Thin Film ◽  
Ammonia Sensing ◽  
Nickel Oxide Thin Film
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