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bifunctional S-scheme hybrid heterojunction comprising CdS nanorods and biOIO_(3) nanosheets for efficient solar-induced antibiotic degradation and highly-selective CO_(2) reduction

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Journal of Materials Science & Technology 2023年第30期161卷 74-87页

作者： Dong-Eun Lee Naresh Mameda Kasala Prabhakar reddy b.Moses Abraham Wan-Kuen Jo Surendar Tonda School of Architecture CivilEnvironmental and Energy EngineeringKyungpook National University80 Daehak-roBuk-guDaegu 41566South Korea Department of Chemistry Koneru Lakshmaiah Education FoundationVaddeswaramGunturAndhra Pradesh 522302India Department of Chemistry and biochemistry University of South Carolina631 Sumter StreetColumbiaSC 29208United States Department of Chemical Engineering Indian Institute of Technology KanpurKanpur 208016India

The development of a bifunctional photocatalyst that can be utilized for both energy conversion and envi-ronmental remediation is of great practical *** addition,an S-scheme charge transfer process can assist a photocatalyst in efficiently separating photoexcited electrons and holes while maintaining the strong reducibility and oxidizability of the former and the latter,*** developed a bifunctional S-scheme hybrid photocatalyst comprising CdS nanorods and biOIO_(3)(bIO) nanosheets for efficient antibi-otic degradation and cocatalyst-and sacrificial reagent-free CO_(2) *** combination of visible-light-responsive one-dimensional(1D)CdS and UV-light-responsive 2D bIO resulted in a CdS/bIO hybrid photocatalyst with effective 1D/2D(line)interfacial contact and a broadened optical absorption ***,the CdS/bIO hybrid exhibited exceptional diclofenac degradation and mineralization as well as outstanding CO_(2) reduction activity for CO production,with 95.4%CO selectivity over H_(2)*** exceptional performance of the hybrid catalyst is primarily attributed to the accelerated photoexcited charge transfer caused by the 1D/2D line interfacial contact and the high charge separation and strong redox power of the separated charges,both of which stem from the effective S-scheme charge transfer *** addition,photocorrosion of CdS was substantially mitigated,resulting in the high photocat-alytic performance of the hybrid catalyst even after repeated test *** study provides insight into the rational design of bifunctional S-scheme hybrid photocatalysts for CO_(2) reduction and pollutant degra-dation.

关键词： CdS biOIO_(3) bifunctional photocatalyst S-scheme mechanism Antibiotic degradation CO_(2)reduction

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Magnetohydrodynamic flow and heat transfer of a hybrid nanofluid over a rotating disk by considering Arrhenius energy

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Communications in Theoretical Physics 2021年第4期73卷 9-20页

作者： M Gnaneswara reddy Naveen Kumar R b C Prasannakumara N G Rudraswamy K Ganesh Kumar Department of Mathematics Acharya Nagarjuna University CampusOngole-523001India Department of Studies and Research in Mathematics Davangere UniversityShivagangothriDavangere-577007KarnatakaIndia Department of Mathematics P.C.Jabin Science CollageHubballi-580031India

This research work explores the effect of hybrid nanoparticles on the flow over a rotating disk by using an activation energy ***,we considered molybdenum disulfide and ferro sulfate as nanoparticles suspended in base fluid *** magnetic field is pragmatic normal to the hybrid nanofluid flow *** derived nonlinear ordinary differential equations are non-dimensionalized and worked out numerically with the help of Maple software by the RKF-45 *** scientific results for a non-dimensionalized equation are presented for both nanoparticle and hybrid nanoparticle *** of various predominant restrictions on flow and thermal fields are *** estimation for friction factor,local Nusselt number and Sherwood number are also *** reveal that the reduction of the heat transfer rate is greater in hybrid nanoparticles when compared to nanoparticles for increasing values of Eckert Number and the thermal field enhances for the enhanced values of volume fraction.

关键词： porous medium MHD hybrid nanoparticles activation energy

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Performance, emission and combustion characteristics of DI diesel engine running on blends of honne oil/diesel fuel/kerosene/DMC

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International Journal of Agricultural and biological Engineering 2011年第3期4卷 48-57页

作者： b.K.Venkanna C.Venkataramana reddy Department of Mechanical Engineering Basaveshwar Engineering CollegeBagalkot 587102KarnatakaIndia Principal Guru Nanak Institute of TechnologyIbrahimpatnamR.R.District-501506Andra PradeshIndia

Honne oil(tamanu)(H),a non-edible vegetable oil is native for northwards of Northern Marianas islands and the Ryukyu Islands in southern Japan and westward throughout *** has remained as an untapped new possible source of alternative fuel that can be used as diesel engine *** pertaining to use of vegetable oil in diesel engine with kerosene and dimethyl carbonate(DMC)is *** present research is aimed to investigate experimentally the performance,exhaust emission and combustion characteristics of a direct injection(DI)diesel engine,typically used in agricultural sector,over the entire load range,when fuelled with neat diesel(ND)and blends of diesel fuel(D)/DMC/H/kerosene(K).DMC/D/H/K blends have a potential to improve the performance and emissions and to be an alternative to *** have been conducted when fuelled with H20(20%H+80%D),HK(20%H+40%K+40%D)and HKD5(20%H+40%K+35D+5%DMC)to HKD15 in steps of 5%DMC keeping H and K percentages *** emissions(CO,HC and smoke density(SD))of fuel blend HKD15 are found to be lowest,with SD dropping *** NOx level is slightly higher with HKD5 to HKD15 as compared to *** brake thermal efficiency of HKD5 to HKD15 is same and it is higher than that of *** is a good trade off between NOx and *** cylinder pressure and premixed combustion phase increases as DMC content increase.

关键词： diesel engine performance emissions combustion vegetable oil kerosene diesel fuel dimethyl carbonates

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Schottky barrier parameters and structural properties of rapidly annealed Zr Schottky electrode on p-type GaN

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Journal of Semiconductors 2017年第6期38卷 44-51页

作者： V.Rajagopal reddy b.Asha Chel-Jong Choi Department of Physics Sri Venkateswara University School of Semiconductor and Chemical Engineering Semiconductor Physics Research Center (SPRC)Chonbuk National University

The Schottky barrier junction parameters and structural properties of Zr/p-GaN Schottky diode are explored at various annealing *** analysis showed that the barrier height（bH）of the Zr/pGa N Schottky diode increases with annealing at 400°C（0.92 eV（I–V）/1.09 e V（C–V））compared to the asdeposited one（0.83 eV（I–V）/0.93 eV（C–V））.However,the bH decreases after annealing at 500°***,at different annealing temperatures,the series resistance and bH are assessed by Cheung’s functions and their values ***,the interface state density（NSS/of the diode decreases after annealing at 400°C and then somewhat rises upon annealing at 500°*** reveals that the maximum bH is obtained at 400°C,and thus the optimum annealing temperature is 400°C for the *** XPS and XRD analysis revealed that the increase in bH may be attributed to the creation of Zr–N phases with increasing annealing up to 400°*** bH reduces for the diode annealed at 500°C,which may be due to the formation of Ga–Zr phases at the *** AFM measurements reveal that the overall surface roughness of the Zr film is quite smooth during rapid annealing process.

关键词： zirconium Schottky contacts p-type GaN electrical characteristics energy distribution curves X-ray photoelectron spectroscopy X-ray diffraction

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Performance, emission and combustion characteristics of direct injection diesel engine running on calophyllum inophyllum linn oil (honne oil)

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International Journal of Agricultural and biological Engineering 2011年第1期4卷 26-34页

作者： b.K.Venkanna C.Venkataramana reddy Department of Mechanical Engineering Basaveshwar Engineering CollegeBagalkot 587102KarnatakaIndia Guru Nanak Institute of Technology IbrahimpatnamR.R.District-501506Andra PradeshIndia

The present work examines the use of a non-edible vegetable oil namely honne oil,a new possible source of alternative fuel for diesel engine.A Direct Injection(DI)diesel engine typically used in agricultural sector was operated on Neat Diesel(ND)and neat honne oil(H100).At maximum load,with H100,brake thermal efficiency and NOx emission decreased where as emissions like CO,HC,smoke opacity *** H100,peak cylinder pressure and maximum rate of pressure rise decreased compared to *** H100,occurrence of peak pressure is away from top dead center compared to *** H100,ignition delay and combustion duration increased compared to ND.

关键词： non edible vegetable oil neat honne oil diesel engine performance emissions combustion

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Perturbations in Earth’s Atmosphere over An Indian Region during the Total Solar Eclipse on 22 July 2009

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Journal of Meteorological Research 2019年第4期33卷 784-796页

作者： S.b.Surendra PRASAD Vinay KUMAR K.Krishna reddy S.K.DHAKA Shristy MALIK M.Venkatarami reddy U.Murali KRISHNA Semi-arid-zone Atmospheric Research Centre(SARC) Department of PhysicsYogi Vemana UniversityKadapaAndhra Pradesh 516003India Radio and Atmospheric Physics Lab Rajdhani CollegeUniversity of DelhiDelhi 110015India Department of Applied Physics Delhi Technical UniversityDelhi 110042India

During a total solar eclipse(TSE)on 22 July 2009,atmospheric perturbations were monitored from the surface to thermosphere to understand TSE’s impact on the meteorological(temperature,relative humidity,wind speed,and wind direction)and chemical(O3 and NOx)parameters around Kadapa(14.28°N,78.42°E),a tropical semi-arid region of *** this purpose,an experiment was conducted at Yogi Vemana University Campus,Kadapa,India,to measure the temperature,wind speed,wind direction,and concentrations of ozone(O3),NO,NO2,and NOx by using the automatic weather station(AWS)and O3 *** the eclipse day(22 July 2009),the surface observations at Kadapa showed a reduction in temperature(about 1.1℃)because of the solar *** of the thermal,dynamical(wind),and chemical parameters on the TSE day with control days[preceding(21 July 2009)and succeeding(23 July 2009)the TSE]illustrated the influence of solar *** the eclipse period,the O3 mixing ratio decreased,while NO2 and NOx increased;however,NO remained *** addition,radio occultation(RO)temperature profiles from Constellation Observing System for Meteorology,Ionosphere,and Climate(COSMIC)/Formosat Satellite Mission(FORMOSAT-3)and Thermosphere,Ionosphere,and Mesosphere Energetics and Dynamics(TIMED)satellites were utilized to understand the impact of TSE on dynamics of the middle and upper atmosphere from tropopause to the *** vertical resolution COSMIC observations revealed that during the solar eclipse,tropopause was cooler with twin peaks(double tropopause).The lower thermosphere between 110 and 130 km became warmer during the TSE,which might be caused by the dynamical response of the atmosphere in this region to the solar *** experimental data have provided very fine-scale variations of the atmospheric parameters both in time and height and also constituted a new set of results on TSE for further research.

关键词： total solar eclipse (TSE) atmospheric perturbations tropopause dynamics COSMIC/FORMOSAT-3satellite radio occultation (RO) observations

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Magnesium based surface metal matrix composites by friction stir processing

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Journal of Magnesium and Alloys 2016年第1期4卷 52-61页

作者： b.Ratna Sunil G.Pradeep Kumar reddy Hemendra Patle Ravikumar Dumpala Department of Mechanical Engineering Rajiv Gandhi University of Knowledge Technologies(AP-IIIT)Nuzvid 520202India Department of Mechanical Engineering Vignana Bharathi Institute of TechnologyHyderabad 501301India Department of Mechanical Engineering Visvesvaraya National Institute of TechnologyNagpur 440010India

Surface metal matrix composites(MMCs)are a group of modern engineered materials where the surface of the material is modified by dispersing secondary phase in the form of particles or fibers and the core of the material experience no change in chemical composition and *** potential applications of the surface MMCs can be found in automotive,aerospace,biomedical and power ***,friction stir processing(FSP)technique has been gaining wide popularity in producing surface composites in solid state *** and its alloys being difficult to process metals also have been successfully processed by FSP to fabricate surface *** aim of the present paper is to provide a comprehensive summary of state-of-the-art in fabricating magnesium based composites by *** of the secondary phase particles and grain refinement resulted from FSP on the properties of these composites is also discussed.

关键词： Surface composites Friction stir processing Hardness Light weight Magnesium alloys biomedical implants

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Sexually transmitted infections of the anus and rectum

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World Journal of Gastroenterology 2014年第41期20卷 15262-15268页

作者： Roland Assi Peter W Hashim Vikram b reddy Hulda Einarsdottir Walter E Longo Department of Surgery Yale University School of Medicine

Sexually transmitted infections(STIs) represent a significant public health *** STIs,once thought to be on the verge of extinction,have recently *** change is thought to be partially related to an increase in STIs of the anus and ***,the global human immunodeficiency virus and acquired immunodeficiency syndrome(HIV/AIDS) epidemic has contributed to the emergence of particular anorectal lesions that require specialized *** this report,we review common anorectal STIs that are frequently referred to colorectal surgeons in the United ***,clinical presentation,and management are summarized,including the latest treatment *** particularity of anorectal diseases in HIV/AIDS is addressed,along with recent trends in anal cytology and human papillomavirus vaccination.

关键词： Sexually transmitted disease Rectal disease Sexual behavior Human papillomavirus Human immunodeficiency virus Perianal disease Highly active antiretroviral therapy Human papilloma virus vaccines Anal cytology

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Magnetic and flotation studies of banded hematite quartzite (bHQ) ore for the production of pellet grade concentrate

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International Journal of Minerals,Metallurgy and Materials 2010年第6期17卷 675-682页

作者： b. Das b.K.Mishra S. Prakash S.K.Das P.S.R.reddy S.I.Angadi Institute of Minerals and Materials Technology Council of Scientific & Industrial Research (CSIR)

To identify and establish beneficiation techniques for banded hematite quartzite （bHQ） iron ore, a comprehensive research on bHQ ore treatment was carried out. The bHQ ore was assayed as 38.9wt% Fe, 42.5wt% SiO2, and 1.0wt% Al2O3. In this ore, hematite and quartz are present as the major mineral phases where goethite, martite, and magnetite are present in small amounts. The liberation of hematite particles can be enhanced to about 82% by reducing the particle size to below 63 μm. The rejection of silica particles can be obtained by magnetic and flotation separation techniques. Overall, the bHQ ore can be enriched to 65.3wt% Fe at 61.9% iron recovery. A flowsheet has been suggested for the commercial exploitation of the bHQ ore.

关键词： hematite beneficiation magnetic separation flotation pelletizing

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Influence of process parameters on physical dimensions of AA6063 aluminium alloy coating on mild steel in friction surfacing

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Defence Technology（防务技术） 2015年第3期11卷 275-281页

作者： b.VIJAYA KUMAR G.MADHUSUDHAN reddy T.MOHANDAS Department of Mechanical Engineering Guru Nanak Institute of Technology Defence Metallurgical Research Laboratory Department of Mechanical Engineering Nalla Malla Reddy Engineering College

An attempt is made in the present study to obtain the relationships among process parameters and physical dimensions of AA6063 aluminium alloy coating on IS2062 mild steel obtained through friction surfacing and their impact on strength and ductility of the coating. Factorial experimental design technique was used to investigate and select the parameter combination to achieve a coating with adequate strength and ductility. Spindle speed, axial force and table traverse speed were observed to be the most significant factors on physical dimensions. It was observed that the thickness of the coating decreased as the coating width increased. In addition, the width and thickness of the coatings are higher at low and high torques. At intermediate torque values, when the force is high, the width of the coating is high, and its thickness is thin; and when the force is low, the width and thickness are low. The interaction effect between axial force(F)-table traverse speed(Vx) and spindle speed(N)-table traverse speed(Vx) produced an increasing effect on coating width and thickness, but other interactions exhibited decreasing influence. It has also been observed that sound coatings could be obtained in a narrow set of parameter range as the substrate-coating materials are metallurgically incompatible and have a propensity to form brittle intermetallics.

关键词：合金涂层摩擦表面尺寸物理工艺参数碳钢涂层厚度试验设计技术

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