The doped ZnO nanorods as a photocatalyst with different Eu contents were prepared by microwave assisted method and they were characterized by means of X-ray diffraction （XRD）, energy-dispersive X-ray spectroscopy ...The doped ZnO nanorods as a photocatalyst with different Eu contents were prepared by microwave assisted method and they were characterized by means of X-ray diffraction （XRD）, energy-dispersive X-ray spectroscopy （EDS）, UV-Vis spectroscopy, surface area Brunauer-Emmett-Teller （BET）, X-ray photoelectron spectroscopy （XPS）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The average crystallite size and band gap energy of Eu-doped ZnO were varied with the Eu content. The XRD pattern of Eu-doped ZnO indicated hexagonal crystal structure with an average crystallite size of 25 nm. The pres-ence of europium with trivalent state and its doping successfully into the crystal lattice of ZnO matrix were confirmed by XPS tech-nique. The photocatalytic activity of Eu-doped ZnO nanorods was evaluated for methyl orange degradation. The photocatalytic experi-ments showed^91%degradation of methyl orange over 0.2 mol.%Eu doped ZnO sample within 3 h under UV light （365 nm）.展开更多
The capturing process for carbon dioxide over porous solid adsorbents such as lithium silicate,lithium aluminate,and magnesium aluminate at pre-combustion temperatures was studied.Lithium silicate was prepared by the ...The capturing process for carbon dioxide over porous solid adsorbents such as lithium silicate,lithium aluminate,and magnesium aluminate at pre-combustion temperatures was studied.Lithium silicate was prepared by the sol gel and solid fusion methods.The lithium silicate adsorbent was characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning elec-tron microscopy(SEM),nuclear magnetic resonance(NMR),and surface area.The capturing of carbon dioxide over lithium silicate,lithium aluminate,and magnesium aluminate was explored at different experimental condi-tions such as exposure time,temperature variation,and exposure carbon dioxide pressure.The capturing process for carbon dioxide was investigated over these adsorbents with variation of their metal mole ratios.The effect of the addition of(promoter)sodium,potassium,and cesium in the lithium silicate adsorbent was explored to investigate the variation of the capture of carbon dioxide over these adsorbents.展开更多
基金Project supported by University Grants Commission(UGC),New Delhi,India(37-335/2009(SR))Department of Science and Technology(DST)of India(SR/S1/PC/0041/2010)
文摘The doped ZnO nanorods as a photocatalyst with different Eu contents were prepared by microwave assisted method and they were characterized by means of X-ray diffraction （XRD）, energy-dispersive X-ray spectroscopy （EDS）, UV-Vis spectroscopy, surface area Brunauer-Emmett-Teller （BET）, X-ray photoelectron spectroscopy （XPS）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The average crystallite size and band gap energy of Eu-doped ZnO were varied with the Eu content. The XRD pattern of Eu-doped ZnO indicated hexagonal crystal structure with an average crystallite size of 25 nm. The pres-ence of europium with trivalent state and its doping successfully into the crystal lattice of ZnO matrix were confirmed by XPS tech-nique. The photocatalytic activity of Eu-doped ZnO nanorods was evaluated for methyl orange degradation. The photocatalytic experi-ments showed^91%degradation of methyl orange over 0.2 mol.%Eu doped ZnO sample within 3 h under UV light （365 nm）.
基金grateful to the Department of Science and Technology,Government of India for awarding Research Grant GAP271526.
文摘The capturing process for carbon dioxide over porous solid adsorbents such as lithium silicate,lithium aluminate,and magnesium aluminate at pre-combustion temperatures was studied.Lithium silicate was prepared by the sol gel and solid fusion methods.The lithium silicate adsorbent was characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning elec-tron microscopy(SEM),nuclear magnetic resonance(NMR),and surface area.The capturing of carbon dioxide over lithium silicate,lithium aluminate,and magnesium aluminate was explored at different experimental condi-tions such as exposure time,temperature variation,and exposure carbon dioxide pressure.The capturing process for carbon dioxide was investigated over these adsorbents with variation of their metal mole ratios.The effect of the addition of(promoter)sodium,potassium,and cesium in the lithium silicate adsorbent was explored to investigate the variation of the capture of carbon dioxide over these adsorbents.
