mos2 supported on tio2 powder
Performance improvement of tio2 catalysts supported on adsorbents
... 1997) On the other hand, the concentration of the contaminants typically is at a low concentration (ppm or less), and pre-concentration of these contaminants on the TiO2 surface where photons are ... Incineration Adsorption Stripping Absorption Condensation Chemical Degradation Chlorination Advanced Oxidation Process (AOPs) Biodegrada -tion Ozonation H2O2/UV O3/UV H2O2/O3/UV TiO2/ UV Figure 1.1 ... Photodegradation rate constants of orange II by supported and unsupported TiO2 at different pH with initial orange II concentration of 50 mg/l Figure 5.5 TOC concentration with time during dark adsorption...
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Photocatalytic degradation of organic pollutants by tio2 catalysts supported on adsorbents
... adsorption 300 10% TiO2- AlPC desorption 20% TiO2- AlPC adsorption 250 Volume (cc/g) (b) 20% TiO2- AlPC desorption 50% TiO2- AlPC adsorption 50% TiO2- AlPC desorption 200 80% TiO2- AlPC adsorption 80% TiO2- AlPC ... MCM-41 adsorption Pure MCM-41 desorption 10% TiO2 -MCM-41 adsorption 10% TiO2 -MCM-41 desorption 25% TiO2 -MCM-41 adsorption 25% TiO2 -MCM-41 desorption 50% TiO2 -MCM-41 adsorption 50% TiO2 -MCM-41 ... researchers Supported catalyst enhances the electron density on the conduction band of TiO2 in composite catalyst as the supported TiO2 absorbs more incident photons (due to dispersion of TiO2 on the...
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Reduction of nitrate by nanoscale zero-valent iron supported on mesoporous silica beads
... Journal of Water and Environment Technology, Vol 6, No.1, 2008 These reactions are known to be favorable only in acidic condition of solution (pH
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photocatalytic nanocomposites based on tio2 and carbon nanotubes
... rate constant [133] Degradation and mineralization can be monitored by determining sulfate ion and total organic carbon concentrations in the reaction solution In this study, the reduction in ... oxidative conversions Environmental decontamination by photocatalysis can be more appealing than conventional chemical oxidation methods because semiconductors are inexpensive, nontoxic, and capable ... solution without irradiation 61 3-14 Dye degradation by anatase – carbon nanotube mixture as a function of carbon nanotube amount 62 3-15 Direct comparison of dye degradations by...
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preparation and characterization of monodispersed wo3 nanoclusters on tio2(110)
... Æ K) is ascribed to N2 physisorption on O2À anions On as-deposited WO3, the TPD intensity of physisorbed N2 attributable to adsorption on Ti4+ cations is monotonically suppressed as the WO3 dose ... spontaneous formation of such trimers directly upon room temperature deposition A detailed description of the chemisorption bonding between (WO3)3 and TiO2( 110) awaits theoretical calculations Qualitatively, ... spacing between neighboring Ti4+ cations along the [001] direction (3) The enhanced tunneling intensity in regions adjacent to the dark regions is no longer evident On the other hand, the surface density...
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Influence of the support on the physicochemical properties of Pt electrocatalysts: Comparison of catalysts supported on different carbon materials
... of Pt catalysts supported on the non-oxidized carbon materials Table The size of Pt crystallites supported on carbon nanofibers was about nm, whereas Pt crystallites supported on CMK-3 were approximately ... specific surface area and the pore volume of the carbon materials, which depended on the oxidation conditions [22,23,25] More severe oxidation conditions resulted in a more significant decrease of the ... carbon samples were analyzed by gas chromatography The determination of deconvolutions was calculated by using Origin software Results and discussion 3.1 Characterization of carbon supports Carbon...
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highly active photocatalytic zno nanocrystalline rods supported on polymer fiber
... crystals on the ZnO coated silicon and PBT substrates The silicon wafer was held face-down in the solution to prevent the precipitation of any ZnO particles that may have formed in the solution bulk ... degradation The inset shows a photograph of the dye solutions in contact with the different substrates after h of illumination The red dye is nearly completely removed from the solution in contact ... either 100 or 200 ZnO deposition cycles, which produce ∼20 or 40 nm thick films, respectively, on planar silicon substrates Refractive index and film thickness on silicon was measured by variable-angle...
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Báo cáo sinh học: " Low-energy structures of clusters supported on metal fcc(110) surface" doc
... that the Pt adatoms on Pt(110) not tend to form close-packed configuration but prefer the loose one which is continuous in [ 10 ] direction but discontinuous in [001] direction, e.g., structure ... observations of the (1×2) surface reconstruction on the Pt(110) plane Phys Rev Lett 1985, 55:2168-2171 20 Robinson IK, Eng PJ, Romainczyk C, Kern K: X-ray determination of the 1×3 reconstruction of ... large islands and the surface reconstruction reflect that our model Equation really works although it is just based on the simplified two-body interaction Conclusion Groups of low-energy structures...
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Báo cáo hóa học: " Improved conversion efficiency of Ag2S quantum dot-sensitized solar cells based on TiO2 nanotubes with a ZnO recombination barrier layer" pdf
... different conditions A three-electrode configuration was employed in our experiments However, a two-electrode configuration was used in the experiments of Tubtimtae et al In addition, our results ... semiconductor-electrolyte interfaces in connection with problems of catalysis Surf Sci 1969, 18:97-122 33 Marcus RA: On the theory of oxidation-reduction reactions involving electron transfer J Chem Phys 1956, ... increased h Conclusions In conclusion, Ag2S quantum dot-sensitized TiO2 nanotube array photoelectrodes were successfully achieved using a simple sequential chemical bath deposition (CBD) method...
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báo cáo hóa học: " Gold nanoparticles supported on magnesium oxide for CO oxidation" pot
... 22 June 2011 References Bond GC, Thompson DT: ’Gold-catalysed oxidation of carbon monoxide’ Gold Bull 2000, 33:41 Bond GC, Louis C, Thompson DT: Catalysis by Gold London: Imperial College Press; ... nm) Abbreviations CP: co-precipitation; DP: deposition-precipitation; DIM: double impregnation; EDXS: energy-dispersive X-ray spectroscopy; HRTEM: high-resolution transmission electron microscopy; ... coprecipitation for low-temperature oxidation of hydrogen and of carbon monoxide J Catal 1989, 115:301 27 Tanielyan SK, Augustine RL: ’Effect of catalyst pretreatment on the oxidation of carbon-monoxide...
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Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge
... Carbon/amount of PAC ( mg g-1) adsorption capacity of PAC does not totally due to the adsorption of DOM on PAC 10 AC AC AC AC PAC on P on P on P on P ion ion tion New tion ba ba bat bat incu incu incu ... Chloride ion (Cl-) concentration was determined by ion-chromatography (Dionex DX-500) DOC concentration was determined by TOC analyzer (Shimadzu TOC-500) Results and Discussion 3.1 Adsorption capacity ... glucose on PAC 4th incubation of glucose on PAC 10 0.1 10 100 1000 -1 E quilibriumC oncentration of 3,5-D P（m l ) C g Figure Adsorption isotherm of 3,5-DCP onto new PAC, PAC in the aeration tank,...
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The Future of the Internet: A Compendium of European Projects on ICT Research Supported by the EU 7th Framework Programme for RTD ppt
... Self-Optimisation and Self-Configuration in Wireless Networks SOCRATES aims at the development, evaluation and demonstration of methods and algorithms for self-configuration, self-optimisation and self-healing, ... vision on the network of the future, organization of an international conference and several open international workshops including one devoted to the Future of the Internet, strong relationship ... the integration of these enabling techniques and the demonstration of the concept in a realistic environment A radio demonstrator will be developed, based on two hardware platforms: one platform...
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aluminum-doped tio2 nano-powders for gas sensors
... ◦ C Among 900 ◦ C samples, wt.% Al-doped TiO2 showed the highest response of 0.94 at 2% oxygen concentration Fig shows the response to different CO concentrations of pure and Al-doped TiO2 calcined ... of pure TiO2 as a function of calcination temperature in oxygen environment The 900 ◦ C calcination shows the best response, though the difference in response as a function of calcination temperature ... hypothesized that powders with higher dopant concentrations need higher calcination temperature or longer calcination time to complete crystallization and see the influence of dopant on response However,...
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hydrothermal synthesis and characterization of tio2 nanorod arrays on glass substrates
... diffraction of TiO2 nanorods; (b) lattice fringes image of high-resolution TEM of one single TiO2 nanorod at the side surface that TiO2 nanorods grow along the (1 0) crystal planes, and this is consistent ... of TiO2 nanorods on the substrate is strongly related to rutile’s inherent growth habit and hydrothermal preparation conditions The structure of rutile consists of chains of TiO6 octahedra along ... hydrothermal reaction process, TiO2 crystalline nucleus is apt to form on the coated TiO2 particles and grow along the (1 0) planes As a result, TNAs can grow on PT-substrate with well orientation and uniform...
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influence of polymerization temperature on nh3 response of pani tio2 thin film gas sensor
... PANI /TiO2 thin films, where simultaneous polymerization of aniline monomer and oxidation of PANI molecules occurred The active solution for PANI /TiO2 nanocomposite material contained colloidal TiO2 ... postulated that PANI and TiO2 form a p–n junction and the inter-particle electron transition from TiO2 to PANI causes the reduction of the activation energy and enthalpy of physisorption for NH3 gas [10] ... heterogeneous nucleation, and the nucleation behavior of PANI is strongly dependent on the polymerization rate determined by reaction temperature As the formation of new embryonic nuclei is much...
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room temperature liquefied petroleum gas (lpg) sensor based on p - polyaniline n - tio2 heterojunction
... p-polyaniline/n -TiO2 heterojunction at a fixed voltage of +2 V and at a concentration of 0.1 vol% LPG is concluded that the gas response is a function of LPG concentration The gas response increased from 15 ... reaction products are not leaving from the interface immediately after the reaction Fig Variation of response and recovery time of the heterojunction sensor with LPG concentration Conclusions In ... the TiO2 film The planes corresponding to (1 0), (1 1), (1 1) and (2 0) are in good agreement with the Joint Committee on Powder Diffraction Standard (JCPDS) (no 21-1276), confirming the formation...
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tem study on the formation process of tio2 nanotubes
... structured fragments Further investigations on formation mechanism are now in progress Acknowledgment This project was supported by the National Natural Science Foundation of China (20071010) References ... HRTEM images (After reaction with alkali for 12 min) a) Swelling side (pointed by arrow); b) Fragments peeling off from granular TiO2 TEM Study on the Formation Process of TiO2 Nanotubes Figure ... atomic percent of Na and the latter(4d) contains only trace of Na, it shows that the treatment with HCl solution is helpful for the removing of Na+ ion from TiO2 nanotubes Why the distance between...
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Photocatalytic Degradation of Isoproturon Pesticide on C, N and S Doped TiO2
... studies, we have concentrated on degradation of isoproturon using TiO2 supported over various zeolites The main idea of using Zeolite support for TiO2 is to enhance the adsorption capacity of the ... stable for longer life Conclusions The present study demonstrates preparation of a C, N, and S doped TiO2 photocatalyst and its role in photocatalytic pesticide degradation The results conclude that ... taking 50 mL of isoproturon solution in glass reactor and only 2–4 % of degradation is observed after 10 h of solar irradiation 3.2.2 Determination of Thiourea Loading over TiO2 To compare the phtotcatalytic...
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