scholarly journals Characterization of Ag-exchanged clinoptilolite treated with a plasma jet at atmospheric pressure

Clay Minerals ◽  
2020 ◽  
pp. 1-10
Author(s):  
Sedef Dikmen ◽  
Neslihan Şahin ◽  
Zafer Dikmen ◽  
Murat Tanışlı
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Structural Changes ◽  
Diffuse Reflectance Spectroscopy ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Morphological Properties ◽  
X Ray ◽  
Functional Changes ◽  
Xrd Patterns

Abstract This study reports on the effects of dielectric barrier discharge-like (DBD-like) plasma jet treatment at atmospheric pressure on Ag cation-exchanged clinoptilolite. In the plasma treatment process, argon plasma was applied to the surface of pellet samples prepared with Ag-clinoptilolite. After DBD-like plasma jet treatment for 30 and 60 min, remarkable colour changes were observed in the pellet samples. These changes indicate that the DBD-like plasma jet application led to the successful reduction of Ag+ to its metallic forms, which was further confirmed by the results of ultraviolet–visible diffuse reflectance spectroscopy. The structural, composition and morphological properties of the DBD-like plasma jet-treated samples were characterized using Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy and energy-dispersive X-ray analyses, and they were compared to the untreated Ag-clinoptilolite. The DBD-like plasma jet treatment caused no detectable structural changes in clinoptilolite within the analytical limitations of the methods used. The FTIR spectra show that the plasma treatment causes discharge-induced functional changes in the hydroxyl stretching region. The peaks appearing in the XRD patterns confirmed the reduction of Ag+ to Ag0 after exposure to the plasma. The present study indicates that the reduction of Ag+ cations to their metallic forms can be performed successfully using the proposed method without collapsing the crystal structure of the Ag-clinoptilolite.

scholarly journals Low Temperature Deposition of TiO2 Thin Films through Atmospheric Pressure Plasma Jet Processing

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 91
Author(s):  
Suresh Gosavi ◽  
Rena Tabei ◽  
Nitish Roy ◽  
Sanjay S. Latthe ◽  
Y. M. Hunge ◽  
...  
Keyword(s):  
Thin Films ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Morphological Properties ◽  
Photocatalytic Decomposition ◽  
Atmospheric Pressure Plasma Jet ◽  
Tio2 Thin Films ◽  
X Ray ◽  
Pressure Plasma

Titanium dioxide (TiO2) has been widely used as a catalyst material in different applications such as photocatalysis, solar cells, supercapacitor, and hydrogen production, due to its better chemical stability, high redox potential, wide band gap, and eco-friendly nature. In this work TiO2 thin films have been deposited onto both glass and silicon substrates by the atmospheric pressure plasma jet (APPJ) technique. The structure and morphological properties of TiO2 thin films are studied using different characterization techniques like X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and field emission scanning electron microscopy. XRD study reveals the bronze-phase of TiO2. The XPS study shows the presence of Ti, O, C, and N elements. The FE-SEM study shows the substrate surface is well covered with a nearly round shaped grain of different size. The optical study shows that all the deposited TiO2 thin films exhibit strong absorption in the ultraviolet region. The oleic acid photocatalytic decomposition study demonstrates that the water contact angle decreased from 80.22 to 27.20° under ultraviolet illumination using a TiO2 photocatalyst.

Influence of Atmospheric Pressure Plasma Pre-Treatment on Sodium Bicarbonate Desizing of Polyacrylate on PET Fabrics

2011 ◽  
Vol 331 ◽  
pp. 718-721 ◽  
Author(s):  
Xu Ming Li ◽  
Yi Ping Qiu
Keyword(s):  
Plasma Treatment ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Sem Analysis ◽  
X Ray ◽  
Pressure Plasma ◽  
Pre Treatment ◽  
Scanning Electron

The influence of He/O2 atmospheric pressure plasma jet (APPJ) treatment on subsequent wet desizing of polyarylate from PET fabrics was studied in present paper. Scanning electron microscopy (SEM) analysis showed an increased surface roughness after the plasma treatment. And SEM results also showed that the fiber surfaces were as clean as unsized fibers surfaces after 35s treatment followed by NaHCO3 desizing. X-ray photoelectron spectroscopy (XPS) analysis indicated that oxygen-based functional groups increased for the plasma treated polyacrylate sized fabrics. The percent desizing ratio (PDR) results showed that more than 99% PDR was achieved after 65s plasma treatment followed by a 5min NaHCO3 desizing.

Comparison of Plasma-Aided Desizing with Conventional Desizing of Polyacrylate on PET Fabrics

2011 ◽  
Vol 331 ◽  
pp. 713-717 ◽  
Author(s):  
Xu Ming Li ◽  
Yi Ping Qiu
Keyword(s):  
Plasma Treatment ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Atmospheric Pressure Plasma Jet ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Scanning Electron

The influence of He/O2 atmospheric pressure plasma jet (APPJ) treatment on subsequent wet desizing of polyarylate on PET fabrics was studied in present paper. Atomic force microscopy (AFM) and Scanning electron microscopy (SEM) showed an increased surface roughness after the plasma treatment. SEM also showed that the fiber surfaces were as clean as unsized fibers after 35 s treatment followed by NaHCO3 desizing. X-ray photoelectron spectroscopy (XPS) analysis indicated that oxygen-based functional groups increased for the plasma treated polyacrylate sized fabrics. Compared to conventional wet desizing, plasma treatment could significantly reduce desizing time.

Influence of Additive Gas on Electrical and Optical Characteristics of Non-equilibrium Atmospheric Pressure Argon Plasma Jet

2011 ◽  
Vol 13 (5) ◽  
pp. 575-582 ◽  
Author(s):  
Xiaomeng Fei ◽  
Shin-ichi Kuroda ◽  
Yuki Kondo ◽  
Tamio Mori ◽  
Katsuhiko Hosoi
Keyword(s):  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Optical Characteristics ◽  
Argon Plasma Jet ◽  
Non Equilibrium

The Research of Atmospheric Pressure Cold Plasma Jet Generated by Auto-Excited-Pulsed DC Discharge

2014 ◽  
Vol 989-994 ◽  
pp. 1200-1203
Author(s):  
Ye Lin Hu ◽  
Qiu Wang ◽  
Zhao Quan Chen
Keyword(s):  
Power Supply ◽  
Discharge Current ◽  
Atmospheric Pressure ◽  
Cold Plasma ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Pulse Frequency ◽  
Dc Discharge ◽  
Pulsed Dc ◽  
Piezoelectric Ceramic Transformer

In order to obtain stable cold plasma jet under atmospheric pressure condition, we designed a high-voltage DC power supply based on the principle of multilayer piezoelectric ceramic transformer (MPT). At the same time, we developed a cold plasma jet device that its shape is similar to the gun structure. The total weight of device, including the power supply and the generator, is less than 500 g. In the experiments of argon plasma under atmospheric pressure, current–voltage measurements show that the discharge actually appears periodically pulsed with a frequency of about 30 kHz. The discharge current has a pulse-width that is about 100 ns, while its peak value reaches about 32 mA. The maximum length of the plasma is about 3 cm. The further study showed that the discharge current pulse frequency is determined by the ion drift mechanism.

scholarly journals Resin Cement–Zirconia Bond Strengthening by Exposure to Low-Temperature Atmospheric Pressure Multi-Gas Plasma

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 631
Author(s):  
Nobuhiro Yoda ◽  
Yuri Abe ◽  
Yuma Suenaga ◽  
Yoshiki Matsudate ◽  
Tomohiro Hoshino ◽  
...  
Keyword(s):  
Treatment Group ◽  
Low Temperature ◽  
Bond Strength ◽  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Untreated Group ◽  
Resin Cement ◽  
Carbon Contamination ◽  
X Ray ◽  
Plasma Irradiation

The purpose of this study was to investigate the effect of gas species used for low-temperature atmospheric pressure plasma surface treatment, using various gas species and different treatment times, on zirconia surface state and the bond strength between zirconia and dental resin cement. Three groups of zirconia specimens with different surface treatments were prepared as follows: untreated group, alumina sandblasting treatment group, and plasma treatment group. Nitrogen (N2), carbon dioxide (CO2), oxygen (O2), argon (Ar), and air were employed for plasma irradiation. The bond strength between each zirconia specimen and resin cement was compared using a tension test. The effect of the gas species for plasma irradiation on the zirconia surface was investigated using a contact angle meter, an optical interferometer, an X-ray diffractometer, and X-ray photoelectric spectroscopy. Plasma irradiation increased the wettability and decreased the carbon contamination on the zirconia surface, whereas it did not affect the surface topography and crystalline phase. The bond strength varied depending on the gas species and irradiation time. Plasma treatment with N2 gas significantly increased bond strength compared to the untreated group and showed a high bond strength equivalent to that of the sandblasting treatment group. The removal of carbon contamination from the zirconia surface and an increase in the percentage of Zr-O2 on the zirconia surface by plasma irradiation might increase bond strength.

Optical Property of The Atmospheric Pressure Argon Plasma Jet Generated by Three Types of Electrodes

2018 ◽  
Vol 39 (4) ◽  
pp. 547-554
Author(s):  
唐蕾 TANG Lei ◽  
王永杰 WANG Yong-jie ◽  
袁春琪 YUAN Chun-qi ◽  
尹增谦 YIN Zeng-qian
Keyword(s):  
Optical Property ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Argon Plasma Jet

scholarly journals Polyimide Surface Modification Using He-H2O Atmospheric Pressure Plasma Jet-Discharge Power Effect

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 662
Author(s):  
Essam Abdel–Fattah ◽  
Mazen Alshaer
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Discharge Power ◽  
Force Microscopy ◽  
Before And After ◽  
Power Effect

The atmospheric pressure He- H 2 O plasma jet has been analyzed and its effects on the Kapton polyimide surface have been investigated in terms of discharge power effect. The polyimide surfaces before and after plasma treatment were characterized using atomic force microscopy (AFM), X-ray photoelectrons spectroscopy (XPS) and contact angle. The results showed that, increasing the discharge power induces remarkable changes on the emission intensity, rotational and vibrational temperatures of He- H 2 O plasma jet. At the low discharge power ≤5.2 W, the contact angle analysis of the polyimide surface remarkably decrease owing to the abundant hydrophilic polar C=O and N–C=O groups as well as increase of surface roughness. Yet, plasma treatment at high discharge power ≥5.2 W results in a slight decrease of the surface wettability together with a reduction in the surface roughness and polar groups concentrations.

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