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Wettability,reactivity,and interface structure in Mg/ni system

Journal of Magnesium and Alloys 2024年第2期12卷 659-672页

作者： S.Terlicka n.Sobczak Ł.Maj P.Darłak J.J.Sobczak Institute of Metallurgy and Materials Science Polish Academy of Sciences25 Reymonta Str.KrakowPoland Faculty of Foundry Engineering AGH University23 Reymonta Str.KrakowPoland

The sessile drop method was applied to the experimental investigation of the wetting and spreading behaviors of liquid Mg drops on pure ni *** comparison,the experiments were performed in two variants:(1)using the Capillary Purification(CP)procedure,which allows the non-contact heating and squeezing of a pure oxide-free Mg drop;(2)by classical Contact Heating(ch)*** high-temperature tests were performed under isothermal conditions(CP:760℃for 30 s;ch:715℃for 300 s)using Ar+5 wt%H_(2) *** the sessile drop tests,images of the Mg/ni couples were recorded by CCD cameras(57 fps),which were then applied to calculate the contact angles of metal/substrate *** and transmission electron microscopy analyses,both coupled with energy-dispersive X-ray spectroscopy,were used for detailed structural characterization of the solidified *** was found that an oxide-free Mg drop obtained by the CP procedure showed a wetting phenomenon on the ni substrate(an average contact angleθnng and good wetting over the ni substrate(θ_((CP))~20°in 5 s)to form a final contact angle ofθ_(f(CP))~18°.In contrast,a different wetting behavior was observed for the ch procedure,where the unavoidable primary oxide film on the Mg surface blocked the spreading of liquid Mg showing apparently non-wetting behavior after 300 s contact at the test ***,in both cases,the deep craters formed in the ni substrates under the Mg drops and significant ch.nge in the structure of initially pure Mg drops to Mg-ni alloys suggest a strong dissolution of ni in liquid Mg and apparent values of the final contact angles measured for the Mg/ni system.

关键词： Magnesium-based alloys Sessile drop tests Capillary purification procedure Wettability Reactivity Contact angle

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Energetic,bio-oil,biochar,and ash performances of co-pyrolysis-gasification of textile dyeing sludge and ch.nese medicine residues in response to K_(2)CO_(3),atmosphere type,blend ratio,and temperature

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Journal of Environmental Sciences 2024年第2期136卷 133-150页

作者： Gang Zhang Zhiyun ch.n Tao ch.n Shaojun Jiang Fatih Evrendilek Shengzheng Huang Xiaojie Tang Ziyi Ding Yao He Wuming Xie Jingyong liu Engineering Research Center of none-food Biomass Efficient Pyrolysis and Utilization Technology of Guangdong Higher Education Institutes Dongguan University of TechnologyDongguan 523808China School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China School of Environment The Environmental Research InstituteMOE Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal UniversityGuangzhou 510006China Department of Environmental Engineering Bolu Abant Izzet Baysal UniversityBolu 14052Turkey

Hazardous waste stream needs to be managed so as not to exceed stock-and rate-limited properties of its recipient *** co-pyrolysis of ch.nese medicine residue(CMR)and textile dyeing sludge(TDS)and its bio-oil,biochar,and ash quality and quantity were characterized as a function of the immersion of K_(2)CO_(3),atmosphere type,blend ratio,and *** to the mono-pyrolysis of TDS,its co-pyrolysis performance with CMR(the comprehensive performance index(CPI))significantly improved by 33.9%in the n_(2)atmosphere and 33.2%in the CO_(2)*** impregnation catalyzed the co-pyrolysis at 370℃,reduced its activation energy by 77.3 kJ/mol in the n_(2)atmosphere and 134.6 kJ/mol in the CO_(2)atmosphere,and enriched the degree of coke gasification by 44.25%in the CO_(2)*** impregnation increased the decomposition rate of the co-pyrolysis by weakening the bond energy of fatty side chains and bridge bonds,its catalytic and secondary products,and its bio-oil yield by 66.19%.Its bio-oils mainly contained olefins,aromatic structural substances,and *** immersion of K_(2)CO_(3)improved the aromaticity of the copyrolytic biochars and reduced the contact between K and Si which made it convenient for Mg to react with SiO_(2)to form *** co-pyrolytic biochar surfaces mainly included-OH,-ch_(2),C=C,and *** main phases in the co-pyrolytic ash included Ca_(5)(PO_(4))_(3)(OH),Al_(2)O_(3),and magnesium-silicate.

关键词： chemical impregnation Catalytic pyrolysis ch.nese medicine residue Textile dyeing sludge Co-pyrolysis

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Corneal and intraocular pressure ch.nges associated to the circadian rhythms:a narrative review

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International Journal of Ophthalmology(English edition) 2024年第10期17卷 1921-1928页

作者： Laura Barberán-Bernardos MiguelÁngel Ariza-Gracia David P Piñero Department of Optics Pharmacology and AnatomyUniversity of AlicanteSan Vicente del Raspeig 03690AlicanteSpain ARTORG Center for Biomedical Engineering Research University of BernBern 3008Switzerland Department of Ophthalmology(IMQO-Oftalmar) Vithas Medimar International HospitalAlicante 03016Spain

AIM:To synthesize the current body of research regarding the diurnal variations in intraocular pressure(IOP)and corneal biomech.nical and morphological parameters,highlighting their significance in various eye ***:A comprehensive review of studies on the diurnal variations of IOP and corneal parameters was *** findings from various studies were assessed,including the Goldmann applanation tonometry(GAT)and non-contact *** on the variations in central corneal thickness(CCT),corneal curvature,and corneal biomech.nics measured by the Ocular Response Analyzer system across different population groups was extracted and ***:In both healthy subjects and those with Fuchs dystrophy,IOP and CCT demonstrate marked diurnal *** remains the gold standard for tonometry,with the highest ***,its measurements are influenced by *** patients and those with pseudoexfoliation showed significant diurnal variations in *** biomech.nical parameters,especially corneal hysteresis(ch)and the corneal resistance factor(CRF),largely remain stable throughout the day for most of eye conditions,with some ***,the corneal morphology diurnal variation,particularly curvature,yielded mixed conclusions across ***:Circadian rhythms significantly influence various corneal parameters,most notably IOP and *** studies should emphasize standardized approaches larger sample sizes,and delve deeper into less-explored areas,such as the effects of orthokeratology lenses on diurnal biomech.nical shifts.

关键词： circadian rhythms intraocular pressure corneal thickness corneal biomech.nics corneal curvature

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Computational design of BC_(3)n_(2) based single atom catalyst for dramatic activation of inert CO_(2) and ch4 gasses into ch_(3)COOH with ultralow ch_(4) dissociation barrier

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ch.nese chemical Letters 2023年第1期34卷 493-498页

作者： ch.nxu Zhao Menghui Xi Jinrong Huo chaozheng He ling Fu Institute of Environment and Energy Catalysis School of Materials Science and Chemical EngineeringXi’an Technological UniversityXi’an 710021China School of Sciences Xi’an Technological UniversityXi’an 710021China College of Resources and Environmental Engineering Tianshui Normal UniversityTianshui 741001China

The production of ch_(3)COOH from CO_(2)and ch_(4) has stimulated much interest due to the high energy density of C2 *** kinds of catalysts have been developed while the high dissociation barrier of ch_(4) and low selectivity still hinders the efficiency of the *** have herein proposed a novel catalyst with single metals loaded on 2D BC_(3)n_(2) substrate(M@2D-BC_(3)n_(2))based on density functional *** numerous candidates,Pt@2D-BC_(3)n_(2) possesses the most favorable reactivity with an ultralow barrier of ch_(4) splitting(0.26 e V),which is due to the efficient capture ability of ch_(4) on Pt ***,the selectivity for ch_(3)COOH is also very high,which mainly stems from the unique electronic properties of molecules and substrate:The degenerated states,including s,px,pyand pz,in CO_(2)reflects the existence of delocalizedπbonds between C and *** can interact with states of Pt(s),Pt(pz),Pt(dxz),Pt(dyz),and Pt(z2)in Pt@2D-BC_(3)n_(2).The kinetics model also proves that our system can promote ch_(3)COOH production via simply increasing the temperature or the coverage of ch_(4) and CO_(2).Our results provide a reasonable illustration in clarifying mech.nism and propose promising candidates with high reactivity for further study.

关键词： Density functional theory CO_(2)/ch4 coactivation 2D BC_(3)n_(2)substrate ch_(3)COOH production

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Structure-regulated fluorine-containing additives to improve the performance of perovskite solar cells

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nano Research 2024年第7期17卷 6080-6086页

作者： Peiya ch.n Xiaoman Bi Hao Yan Yingjie Zhao Yihao liu Zhuo Huang Qian Xiao Yongpeng Yang Shasha Zhang Yiqiang Zhang Yanlin Song Henan Institute of Advanced Technology College of ChemistrySchool of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences(ICCAS)Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyNational Laboratory for Molecular Sciences(BNLMS)Beijing 100190China

Perovskite solar cells(PSCs)have seen remarkable progress in recent years,largely attributed to various additives that enhance both efficiency and *** these,fluorine-containing additives have garnered significant interest because of their unique hydrophobic properties,effective defect passivation,and regulation capability on the crystallization ***,a targeted structural approach to design such additives is necessary to further enhance the performance of ***,fluoroalkyl ethylene with different fluoroalkyl chain lengths(ch_(2)ch(CF_(2))nCF_(3),n=3,5,and 7)as liquid additives is used to investigate influences of fluoroalkyl chain lengths on crystallization regulation and defect *** findings indicate that optimizing the quantity of F groups plays a crucial role in regulating the electron cloud distribution within the additive *** optimization fosters strong hydrogen bonds and coordination effects with FA+and uncoordinated Pb^(2+),ultimately enhancing crystal quality and device ***,1H,1H,2H-perfluoro-1-hexene(PF_(3))with the optimal number of F presents the most effective modulation effect.A PSC utilizing PF_(3)achieves an efficiency of 24.05%,and exhibits exceptional stability against humidity and thermal *** work sheds light on the importance of tailored structure designs in additives for achieving high-performance PSCs.

关键词： perovskite solar cells fluorine number additive structure crystallization regulation defect passivation

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Effect of music therapy on short-term psychological and physiological outcomes in mech.nically ventilated patients: A randomized clinical pilot study

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Journal of Intensive Medicine 2024年第04期04卷 515-525页

作者： Ettenberger M. Casanova-Libreros R. chávez-chávez J. Cordoba-Silva J.G. Betancourt-Zapata W. Maya R. Fandiño-Vergara L.A. Valderrama M. Silva-Fajardo I. Hernández-Zambrano S.M. SOnO - Centro de Musicoterapia Bogotá Colombia Vice-Rectorate for Research Fundación Universitaria de Ciencias de la Salud Bogotá Colombia Department of Biomedical Engineering University of Los Andes Bogotá Colombia Department of Rehabilitation Sociedad de Cirugía de Bogotá Hospital de San José Bogotá Colombia Faculty of nursing Fundación Universitaria de Ciencias de la Salud Bogotá Colombia

Background: Elevated anxiety levels are common in patients on mech.nical ventilation (MV) and may challenge recovery. Research suggests music-based interventions may reduce anxiety during MV. However, studies investigating specific music therapy techniques, addressing psychological and physiological well-being in patients on MV, are scarce. Methods: This three-arm randomized clinical pilot study was conducted with MV patients admitted to the intensive care unit (ICU) of Hospital San José in Bogotá, Colombia between March 7, 2022, and July 11, 2022. Patients were divided into three groups: intervention group 1 (IG1), music-assisted relaxation; intervention group 2 (IG2), patient-preferred therapeutic music listening; and control group (CG), standard care. The main outcome measure was the 6-item State-Anxiety Inventory. Secondary outcomes were: pain, measured with a visual analog scale; resilience, measured with the Brief Resilience Scale; agitation/sedation, measured with the Richmond Agitation–Sedation Scale; vital signs, including heart rate, blood pressure, oxygen saturation, and respiratory rate; days of MV; extubation success; and days in the ICU. Additionally, three patients underwent electroencephalography during the interventions. Results: Data from 23 patients were analyzed in this study. The age range of the patients was 24–84 years, with a median age of 66 years (interquartile range: 57–74). Of the 23 patients, 19 were female (82.6%). no statistically significant differences between the groups were observed for anxiety (P=0.330), pain (P=0.624), resilience (P=0.916), agitation/sedation (P=0.273), length of ICU stay (P=0.785), or vital signs. A statistically significant difference between the groups was found for days of MV (P=0.019). Electroencephalography measurements showed a trend toward delta and theta band power decrease for two patients and a power increase on both beta frequencies (slow and fast) in the frontal areas of the brain for one patient. Co

关键词： Anxiety Intensive care unit Mech.nical ventilation Music therapy Pain

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Density functional calculations of efficient H_2 separation from impurity gases(H_2,n_2,H_2O,CO,Cl_2, and ch_4)via bilayer g-C_3n_4 membrane

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ch.nese Physics B 2019年第4期28卷 362-369页

作者： ch.nmei Tang Xinbo Wang ch.ng Wang ling Fu College of Science Hohai University College of Agricultural Engineering Nanyang Normal University Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-north Diversion Project of Henan Province

Membrane technology has been used for H_2 purification. In this paper, the systematic density functional simulations are conducted to study the separation of H_2 from the impurity gases(H_2, n_2, H_2 O, CO, Cl_2, and ch_4) by the bilayer porous graphitic carbon nitride(g-C_3 n_4) membrane. Theoretically, the bilayer g-C3 n4 membrane with a diameter of about3.25 A? should be a perfect candidate for H_2 purification from these mixed gases, which is verified by the high selectivity(S) for H_2 over other kinds of gases(3.43 × 1028 for H_2/n2; 1.40 × 1028 for H_262/H_2 O; 1.60 × 10 for H_2/CO; 4.30 × 10^(14) for H_2/Cl_2; 2.50 × 10^(55) for H_2/ch_4), and the permeance(P) of H_2(13 mol/m^2·s·Pa) across the bilayer g-C_3 n_4 membrane at 300 K, which should be of great potential in energy and environmental research. Our studies highlight a new approach towards the final goal of high P and high S molecular-sieving membranes used in simple structural engineering.

关键词： g-C3n4 gas separation density functional molecular dynamics simulation

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Estimating rock properties using sound signal dominant frequencies during diamond core drilling operations

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Journal of Rock Mech.nics and Geotechnical Engineering 2019年第4期11卷 850-859页

作者： ch.Vijaya Kumar Harsha Vardhan ch.S.n.Murthy n.C.Karmakar Department of Mining Engineering National Institute of Technology KarnatakaSurathkalIndia Indian Institute of Technology (BHU) VaranasiIndia

In many engineering applications such as mining,geotechnical and petroleum industries,drilling operation is widely *** drilling operation produces sound by-product,which could be helpful for preliminary estimation of the rock ***,determination of rock properties is very difficult by the conventional methods in terms of high accuracy,and thus it is expensive and *** this context,a new technique was developed based on the estimation of rock properties using dominant frequencies from sound pressure level generated during diamond core drilling ***,sound pressure level was recorded and sound signals of these sound frequencies were analyzed using fast Fourier transform (FFT).Rock drilling experiments were performed on five different types of rock samples using computer numerical control (CnC) drilling mach.ne BMV 45 *** simple linear regression analysis,mathematical equations were developed for various rock properties,*** compressive strength,Brazilian tensile strength,density,and dominant frequencies of sound pressure *** developed models can be utilized at early stage of design to predict rock properties.

关键词： Rock properties Sound pressure level Fast Fourier transform (FFT) Sound signal Core drilling Dominant frequencies

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Tuning Structural and Electronic Configuration of Fen_(4) via External S for Enhanced Oxygen Reduction Reaction

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Energy & Environmental Materials 2024年第2期7卷 93-101页

作者： Shidong Li Lixue Xia Jiantao Li Zhuo ch.n Wei Zhang Jiexin Zhu Ruohan Yu Fang liu Sungsik Lee Yan Zhao Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200China chemical Sciences and Engineering Division Argonne National Laboratory9700 South Cass AvenueLemontIL 60439USA nRC(nanostructure Research Centre) Wuhan University of TechnologyWuhan 430070China X-ray Science Division Advanced Photon SourcesArgonne National Laboratory9700 South CassAvenueLemontIL 60439USA State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China The Institute of Technological Sciences Wuhan UniversityWuhan 430072China Hubei Longzhong Laboratory Xiangyang 441000China

The Fe-n-C material represents an attractive oxygen reduction reaction electrocatalyst,and the Fen_(4)moiety has been identified as a very competitive catalytic active *** tuning of the coordination structure of Fen_(4)has an essential impact on the catalytic ***,we construct a sulfur-modified Fe-n-C catalyst with controllable local coordination environment,where the Fe is coordinated with four in-plane n and an axial external *** external S atom affects not only the electron distribution but also the spin state of Fe in the Fen_(4)active *** appearance of higher valence states and spin states for Fe demonstrates the increase in unpaired *** the above characteristics,the adsorption and desorption of the reactants at Fen_(4)active sites are optimized,thus promoting the oxygen reduction reaction *** work explores the key point in electronic configuration and coordination environment tuning of Fen_(4)through S doping and provides new insight into the construction of M-n-C-based oxygen reduction reaction catalysts.

关键词： coordination structure electronic configuration Fen_(4)moiety oxygen reduction reaction sulfur doping

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Porous poly（triazine-heptazine）s:low-temperature solvothermal synthesis,*HCO intermediate activation and photocatalytic COreduction to ch

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Science ch.na chemistry 2024年

作者： Zhu Gao Zhiwei Jiang Min liu Yumin Yang Shahzad Ali Qiujian Xie Yuqiang Li Shuai Gu Younian liu Juntao Tang ch.nyue Pan Jiayin Yuan Guipeng Yu Department of chemistry and chemical Engineering Central South University Hunan Joint International Research Center for Carbon Dioxide Resource Utilization School of Physics and ElectronicsCentral South University State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Department of Materials and Environmental chemistry Stockholm University

High-temperature ionothermal synthesis has been proven effective in preparing environment-friendly carbon nitride （Cn）-based photocatalysts in either triazine or heptazine form for CO2reduction reaction （CO2RR）.However,such a process is usually energy-intensive and suffers from partial carbonization that results in non-porous catalysts and degenerating their ***,we report the preparation of highly porous Cn polymers (porous C6n7,C3n3,C4.5n5) through a low-temperature solvothermal polymerization of cyameluric chloride itself or cyanuric chloride itself,or both,*** such,it avoids unfavorable carbonization and allows for fine control of its chemical structure and significantly enlarged surface area (up to669 m2g-1).The pincer-like 2,2′-bipyridine sites of porous C6n7alter the photocatalytic CO2reduction pathways via stabilizing the*HCO intermediates,which promotes further hydrogenation to produce ch4in a high *** from the carbonization-free polymerization,high porosity,and*HCO intermediate activation,porous C6n7gave a superior CO2RR to ch4performance (17.18μmol g-1h-1) as well as high stability （5 successive cycles）,outperforming the bulk and state-of-the-art counterparts of *** opens an avenue for the rational construction of efficient porous Cn-based photocatalytic systems,demonstrating their great potential in energy conversion reactions.

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