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Platinum quantum dots-decorated MXene-derived titanium dioxide nanowire/Ti_(3)C_(2) heterostructure for use in solar-driven gas-phase carbon dioxide reduction to yield value-added fuels

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Journal of Energy Chemistry 2023年第7期82卷 627-637,I0013页

作者： kamaks.aiah charyulu devarayapalli S.V.Prabhakar Vattikuti Dong Jin Kim Youngsu Lim Bolam Kim Gyuhyeon Kim Dae Sung Lee Department of Environmental Engineering Kyungpook National UniversityBuk-guDaegu 41566Republic of Korea Research Institute of Environmental Science&Technology Core Research InstituteKyungpook National UniversityBuk-guDaegu 41566Republic of Korea School of Mechanical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea School of Architecture CivilEnvironmental and Energy EngineeringKyungpook National UniversityBuk-guDaegu 41566Republic of Korea

Solar-driven photocatalytic CO_(2) reduction to produce valuable chemicals and fuels offers an attractive strategy in alleviating the energy *** quantum dots(PtQDs)with TiO_(2) nanowire(TiO_(2)NW)/Ti_(3)C_(2) MXene heterostructures(Pt-TiO_(2)NW/Ti_(3)C_(2)) with tight interfacial contacts between the various components were prepared at room temperature via oxidation *** incorporated PtQDs played crucial roles as electron conduction bridges supported by the cocatalyst effect,effectively enhancing the separation efficiencies of photoinduced electron/hole pairs and improving CO_(2) reduction under simulated solar light *** Pt-TiO_(2)NW/Ti_(3)C_(2) heterostructures exhibited remarkable carbon monoxide(CO)and methane(CH_(4)) production at respective rates of 38.14 and 36.15μmol g^(-1)after 10 h of simulated solar light irradiation,an apparent quantum yield of 1.68%,and 79.2%selectivity for *** photocatalytic activities of the Pt-TiO_(2) NW/Ti_(3)C_(2) heterostructures for CO_(2) reduction were significantly enhanced compared to those of TiO_(2)NW/Ti_(3)C_(2) and the single-component photocatalysts,and they exhibited remarkable stabilities even after five *** addition,the densities of states and electronic characteristics of Ti_(3)C_(2) MXene and Pt-TiO_(2)NW/Ti_(3)C_(2) were studied using density functional theory,and a synergistic mechanism of the improvement in CO_(2) photoreduction is proposed.

关键词： MXene CO_(2)reduction Density functional theory Quantum dot Photocatalyst

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Effect of Monocrotophos and Quinalphos on Soil Population and Nitrogen-Fixing Activity of Azospirillum sp.

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Biomedical and Environmental Sciences 1989年第4期2卷 305-311页

作者： V.RANGASWAMY P.B.B.N.charyulu K.VENKATESWARLU Department of Microbiology Sri Krishnadevaraya UniversityAnantapur 515003India

The effects of monocrotophos and quinalphos on population and nitrogen-fixing activity of Azospirillum *** four agricultural soils were determined in a laboratory *** of the two insecticides up to a 5 kg ha^(-1)level were either stimulatory or innocuous to the popula- tion of Azospirillum in the *** successive applications of the insecticides to soils resulted in a significant increase in the population *** of Azospirillum sp.,isolated from insecticide-treated soils,exhibited greater nitrogen-fixing *** consecutive subcultur- ings of the isolates from insecticide-treated soils had no effect on their nitrogen-fixing activity.1989 Academic Press,Inc.

关键词： In test Effect of Monocrotophos and Quinalphos on Soil Population and Nitrogen-Fixing Activity of Azospirillum sp

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Effect of ramp-cavity on hydrogen fueled scramjet combustor

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Propulsion and Power Research 2014年第1期3卷 22-28页

作者： J.V.S.Moorthy B.Rajinikanth B.V.N.charyulu G.Amba Prasad Rao Scientist Defence Research and Development LaboratoryHyderabadAndhra Pradesh 500058India Professor in Mechanical Engineering National Institute of TechnologyWarangalAndhra Pradesh 506004India

Sustained combustion and optimization of combustor are the two challenges being faced by combustion scientists working in the area of supersonic *** mixing,lower stagnation pressure losses,positive thrust and sustained combustion are the key issues in the field of supersonic *** fluid mechanism is required to achieve good *** induce such mechanisms in supersonic inflows,the fuel injectors should be critically shaped incurring less flow *** investigations are focused on the effect of fuel injection scheme on a model scramjet combustor *** at supersonic flow generate axial vortices that help in macro-mixing of fuel with *** of shocks generated by ramps with the fuel stream generates boro-clinic torque at the air&liquid fuel interface,enhancing *** zones present in cavities increase the residence time of the combustible *** use of the advantageous features of both,a ramp-cavity combustor is *** combustor has two ***,constant height section consists of a backward facing step followed by ramps and cavities on both the top and bottom *** ramps are located alternately on top and bottom *** complete combustor width is utilized for the *** second section of the combustor is diverging area *** is provided to avoid thermal *** the present work gaseous hydrogen is considered as *** study was mainly focused on the mixing different fuel injection *** was found that injecting fuel upstream of the ramp was beneficial from fuel spread point of view.

关键词： Supersonic combustion Combustion instabilities Ramps Cavities Mixing

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