The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Solid-state compositions containing copper(II) chloride, halide ions (X−), and natural clinoptilolite (N-CLI) were obtained. N-CLI and CuCl2-KX/N-CLI samples were characterized by X-ray diffraction phase analysis, IR spectroscopy, thermogravimetry, water vapor adsorption, and pH-metry. In addition, they were tested in the reaction of sulfur dioxide oxidation with air oxygen. As found, N-CLI has no...
Mn1Ce1 and Mn0.9Co0.1Ce1 complex oxides were prepared by co-precipitation in hydrothermal conditions and their physicochemical properties were characterized with N2 adsorption, XRD, Raman, and SEM. The complex oxides show enough stability and catalytic activity for oxidative degradation of 4,4'-Dibromobiphenyl in sub-critical water. Mn0.9Co0.1Ce1 has higher activity than Mn1Ce1, indicating doping...
The catalytic oxidation of Acid Red 18 was investigated, with hydrogen peroxide as oxidant and Fe2O3/ZSM-5 as catalysts respectively. Effects of pH, salinity and anions on the catalyst activity were studied. And the lifespan of catalyst was preliminarily investigated. The result shows that catalytic activity is better in acid and alkaline environments (colour removal almost more than 95%) and lower...
The reduction of particulate matter (PM) emission from Diesel engines is an important challenge due to their adverse effects on human health and environment. Therefore, Diesel particulate filters (DPF) are used to trap PM in the gas exhaust lines. DPF must be regenerated periodically by burning off the PM deposit in order to prevent high back pressure level. It is well known that Balance Point Temperature...
A series of CuO-CeO2 catalysts doped with transition metal oxides were prepared by co-precipitation method for selective CO oxidation and the effects of the additives on the catalytic performance were examined by H2-TPR, in-situ DRIFTS techniques. The results showed that the main CO adsorption site on CuO-CeO2 series catalysts was Cu+ species. The catalytic activity at lower temperatures was related...
AC gliding arc reactor producing syngas (H2+CO) for partial oxidation of methane in an atmospheric gliding arc discharge has been designed and constructed. In this case, no catalysts are used to assist reforming; the plasmas play a role as catalyst and provide the energy for such reactions. The oxygen in the air is used for the partial oxidation of methane. The methane conversion and the energy efficiency...
The removal of flotation reagent butyl xanthate by catalytic ozonation process using Mn-Ce-Al2O3 as catalyst was investigated. The effects of initial pH value, ozone dosage, catalyst loading, initial solution concentration, different process on butyl xanthate removal ratio were carried out. There action mechanism of Mn-Ce-Al2O3 for butyl xanthate was discussed by adding tert-butyl alcohol. The stability...
Visible-light response CoAl2O4, MgFe2O4 and CoFe2O4 spinel nanoparticles were prepared by the inorganic salt sol-gel method, and characterized by using XRD, SEM and UV-Vis. The characterization show that the three photocatalysts were in spinel-type structure with the spherical-like particle size in the range of 3~20 nm. The absorbing wavelengths of the three photocatalysts were larger than 800 nm...
This paper proposes a high reaction area (HRA) electrode with finely dispersed electrocatalysts supported on carbon nanotubes (CNTs) for high performance micro direct methanol fuel cell (μDMFC). Ionomer Nafion® loading by spin-coating on the catalysts was in-detail investigated for performance enhancement in anodic half-cell. In terms of electrochemical surface area (ESA) and charge transfer resistance...
There is considerable recent interest in forming nano-materials with enhanced or unique properties and there has already been a great deal of interest in applying nanotechnology to improve fuel cell performance. Researchers have shown that the power output of fuel cells can be enhanced by using carbon nanotubes as catalyst supports. This paper aims to combine the advantages high resolution lithography...
In this abstract, a significantly efficient modification method for Sm2Ti2S2O5 was introduced by employing both reduction and oxidation cocatalysts to improve the H2 activity from water. The modified photocatalyst Sm2Ti2S2O5 is loaded with Ag2S and Rh.The preparation of Ag2S/Sm2Ti2S2O5 involves a one-pot synthesis of by sulfurizing a mixed oxide consisting of Ag, Sm, and Ti, followed by deposition...
Due to the potential environmental applications, photocatalytic reactions occurring on the surface of photoirradiated titanium (IV) oxide (TiO2) have garnered a wide interest. Despite displaying high photocatalytic activity, the utilization of TiO2 is limited by its lack of selectivity. This paper presents the synthesis of platinized TiO2 core and hollow silica shell (SiO2/void/Pt-TiO2), with the...
Highly roughened and catalytic macroporous Au with Pt nanoparticles (macroporous Au-/nPts) hybrid electrode was newly fabricated and characterized for compact nonenzymatic glucose biofuel cell (BFC) applications. Two disk type macroporous Au-/nPts hybrid electrodes were then sandwiched with Nafion film for fabricating a extremely miniaturized BFC device with a cathode and an anode electrodes. As expected,...
The supported catalyst was prepared with transitional metal Co as the active component and the granular active carbon as the carrier. The catalytic wet air oxidation of methyl orange simulated wastewater with chlorine dioxide as oxidant. The optimal conditions were as follows:pH was 2, the dosing quantity of chlorine dioxide was 24 mg/L and catalyst was 60·g/L-1, reaction time was 60 min, the maximum...
Stricter emission standards are forcing automakers to couple the catalytic converters closer to the engine exhaust. Mounting the catalytic converter (DOC) at or near the exhaust manifold helps to reduce the increase in emission after a cold engine is started. The spike occurs because cold engines require a richer air-fuel mixture to run smoothly. The emission standards can be met only by appropriate...
In the present work, the photochemical oxidation of phenol and chlorophenol aqueous solutions in a batch recycle photochemical reactor using ultraviolet irradiation, hydrogen peroxide and TiO2 (as photocatalyst) was studied. The study showed that the combined treatment process was the most effective process under acidic conditions and showed a higher rate of degradation of phenol and chlorophenol...
Currently, consumer electronics, flexible and portable electronic products are the most popular because of further miniaturization accompanying more functionality per device and low costs. To produce high volume, high-density interconnect substrates, flexible printed circuits (FPCs) will become more and more important. For the fabrication of FPCs, polyimides (Pis) possess many outstanding properties,...
The influences of CeO2 and La2O3 on catalytic wet air oxidation of PH3 was investigated. CuO catalysts, CuO-CeO2 catalysts and CuO-La2O3 catalysts were prepared using the co-precipitation method. Results revealed that the purification efficiency of PH3 removed by the combination of Ce and Cu oxide was good. The catalystic activity of CuO-CeO2 catalysts influenced by the ratio of Cu to Ce was studied,...
In this study, the catalytic activities of Raw CNTs and Co/CNTs for CO removal were determined between 100 and 300°C. To confirm the characterization of Raw CNTs and Co/CNTs, the composition and morphology of two catalysts were analyzed by using XRD, SEM, TEM and Raman spectra. The results showed that the CO conversion was 98% by using Raw CNTs at 250°C and this conversion was similar to that of using...
In this study, we synthesized titania nanotubes (TNTs) by a hydrothermal process from commercial P25, and prepared Pt/TNT catalysts by impregnation. To evaluate their catalytic activity, we reacted the TNTs and Pt/TNTs photocatalytically with carbon monoxide (CO). These investigations indicated that the efficient removal of CO could be attributed to the high dispersion of Pt on the TNT (123.4 m2/g,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.