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S vacant CuIn_(5)S_(8) confined in a few-layer MoSe_(2) with interlayerexpanded hollow heterostructures boost photocatalytic CO_(2) reduction

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Rare Metals 2022年第1期41卷 144-154页

作者： Li-Juan Chen Ting-Ting Liu Shu-Ming Liu Sheng cai xiao-xiao Zou jing-Wen Jiang Zhi-Yuan Mei Gen-Fu Zhao xiao-Fei Yang Hong Guo School of Materials and Energy Yunnan UniversityKunming 650091China Nanomaterials and Energy Lab Department of Mechanical and Materials EngineeringWestern UniversityLondonON N6A 5B9Canada

The conversion of CO_(2)into CO,CH_(4)and other hydrocarbons through solar energy can alleviate the energy shortage *** design a novel photocatalyst with S defects CuIn_(5)S_(8)@MoSe_(2)hollow *** interlayerexpanded MoSe_(2)can increase the adsorption of *** unique hollow structure can improve the light utilization efficiency and the electron–holes ***_(5)S_(8)with S vacancies in bimetallic sites has high selectivity and photocatalytic reduction of CO_(2)***,S vacant CuIn_(5)S_(8)confined in a few-layers MoSe_(2)with interlayer-expanded hollow heterostructures exhibit super performance for photocatalytic CO_(2)*** 8-h light reaction,the outputs of CO and CH_(4)for the 15.3 wt%CuIn_(5)S_(8)@MoSe_(2)sample containing S vacancies(Vs)are 30.4 and 14.7 lmol·g^(-1),*** mechanism is also investigated in detail through in situ Fourier transform infrared spectroscopy technology.

关键词： Sulfur vacancy CuIn_(5)S_(8) MoSe_(2)heterojunction Photocatalytic CO_(2)reduction

INFLUENCE OF STRUCTURE ON HYDRAULIC CHARACTERISTICS OF T SHAPE FISHWAY

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Journal of Hydrodynamics 2012年第5期24卷 684-691页

作者： MAO Xi FU jing-jing TUO You-cai AN Rui-dong LI Jia State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065China HydroChina Hua Dong Engineering Corp.9 Hangzhou 310014 China

While dams cut off the migratory route of fish, and affect their growth and breeding, fishways are built to restore the con- nectivity of rivers and facilitate the life cycle of these migratory fish. This paper proposes a new kind of fishway called the ＂T shape fishway＂, and studies it by using both numerical simulations and physical experimental methods with the aim to design a fishway in China for migratory fish with swimming and jumping capability much poorer, such as schizothorax davidi and schizothorax prenanti, as compared with migratory fish in other places of the world, like trout and salmon. It is indicated that the range of velocity in each regular pool of the T shape fishway is from 0.42 m/s to 1.22 m/s when the flow discharge Q is 350 L/s, and there are no large vortex zones found there. This study shows that the T shape fishway can meet the requirements of these migratory fish quite well in terms of velocity and flow patterns in China.

关键词： fishway migratory fish baffle drop sill numerical simulation experiment

Direct electron transfer of glucose oxidase on the carbon nanotube electrode

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Science China Chemistry 2004年第2期47卷 113-119页

作者： cai Chenxin CHEN jing LU Tianhong Department of Chemistry Nanjing Normal University Nanjing 210097 China Department of Chemistry Nanjing Normal University Nanjing 210097 China Department of Chemistry Nanjing Normal University Nanjing 210097 China

The direct electron transfer of glucose oxidase (GOx) immobilized onto the surface of the carbon nanotube (CNT)-modified glassy carbon (CNT/GC) electrode is reported. The direct electron transfer rate of GOx is greatly enhanced when it was immobilized onto the surface of CNT/GC electrode. Cyclic voltammetric results show a pair of well-defined and nearly symmetric redox peaks, which corresponds to the direct electron transfer of GOx, with the formal potential (E 0′), which is almost independent on the scan rates, of about ?0.456 V (vs. SCE) in the phosphate buffer solution (pH 6.9). The apparent heterogeneous electron transfer rate constant (ks) of GOx at the CNT/GC electrode surface is estimated to be (1.74 ± 0.42) s-1, which is much higher than that reported previously. The dependence of E 0′ on solution pH indicates that the direct electron transfer of GOx is a two-electron-transfer coupled with two-proton-transfer reaction process. The experimental results also demonstrate that the immobilized GOx retains its bioelectrocatalytic activity toward the oxidation of glucose. The method presented here can be easily extended to obtain the direct electrochemistry of other enzymes or proteins.

关键词： carbon nanotube, chemically modified electrode, direct electrochemistry, bioelectrocatalysis, glucose oxidase, glucose.

Silver-anchored porous aromatic framework for efficient conversion of propargylic alcohols with CO_(2) at ambient pressure

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Chinese Chemical Letters 2023年第4期34卷 440-443页

作者： xiao-Xuan Guo Zhao-Tian cai Yaseen Muhammad Feng-Lei Zhang Rui-Ping Wei Li-jing Gao Guo-Min xiao School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China Institute of Chemical Sciences University of Peshawar25120KPPakistan Intelligent Transportation System Research Center Southeast UniversityNanjing 211189China

The conversion of propargylic alcohols and carbon dioxide(CO_(2)) into fine chemicals suffers from issues of harsh reaction conditions and difficult catalyst recovery. To achieve efficient CO_(2)activation at low energy consumption, a silver-anchored porous aromatic framework catalyst Ag@PAF-DAB with high active phase density and CO_(2)adsorption capacity was proposed. Since Ag@PAF-DAB has the dual functions of CO_(2)capture and conversion, propargylic alcohols were completely converted into α-alkylidene cyclic carbonate or α–hydroxy ketone as high value-added product under atmospheric pressure(CO_(2), 0.1 MPa) and low silver equivalent(0.5 mol%). Notably, Ag@PAF-DAB exhibited broad substrate diversity, high stability,and excellent reusability. By applying FTIR and GC, the key to green synthetic route of α–hydroxy ketone was confirmed to lie in the further hydration of α-alkylidene cyclic carbonate.

关键词： Porous aromatic framework CO_(2)capture CO_(2)conversion α-Alkylidenecycliccarbonate α-Hydroxyketone

Dual-functional pyrene implemented mesoporous silicon material used for the detection and adsorption of metal ions

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Chinese Journal of Chemical Engineering 2023年第8期60卷 108-117页

作者： jing Huang Honghui cai Qian Zhao Yunpeng Zhou Haibo Liu jing Wang School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China

A fluorescent active organic–inorganic hybrid material Py N-SBA-15 was synthesized by implementing pyrene derivatives into mesoporous SBA-15 *** N-SBA-15 had detection and removal functionalities toward Al^(3+),Cu^(2+),and Hg^(2+).On the one hand,Py N-SBA-15 was used as a fluorescence sensor and displayed high sensitivity toward Al^(3+),Cu^(2+),and Hg^(2+)cations (limit of detection:8.0×10^(-7),1.1×10^(-7),and 2.9×10^(-6)mol·L^(–1),respectively) among various analytes with“turn-off”*** the other hand,the adsorption studies for these toxic analytes (Cu^(2+),Hg^(2+),and Al^(3+)) showed that the ion removal capacity could reach up to 45,581,and 85 mg·g^(-1),***,the Langmuir isotherm models were better fitted with the adsorption data,indicating that the adsorption was mono-layer *** analysis revealed that the adsorption process was well described by the pseudo-second-order kinetic model for Cu^(2+)and Hg^(2+)and pseudo-first-order kinetic model for Al^(3+).The prepared silica material could be reused in four recycles without significantly decreasing its adsorption ***,the Py N-SBA-15 material can serve as a promising candidate for the simultaneous rapid detection and efficient adsorption of metal ions.

关键词： Dual function Nanomaterials Mesoporous silica Metal ions Detection and adsorption

Remaining Useful Life Prediction for Aero-Engines Combining Sate Space Model and KF Algorithm

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第3期34卷 265-271页

作者： cai jing Zhang Li Dong Ping College of Civil Aviation Nanjing University of Aeronautics and Astronautics

The key to failure prevention for aero-engine lies in performance prediction and the exhaust gas temperature margin(EGTM)is used as the most important degradation parameter to obtain the operating performance of the *** of the complex environment interference,EGTM always has strong randomness,and the state space based degradation model can identify the noisy observation from the true degradation state,which is more close to the actual ***,a state space model based on EGTM is established to describe the degradation path and predict the remaining useful life(RUL).As one of the most effective methods for both linear state estimation and parameter estimation,Kalman filter(KF)is ***,with EGTM degradation data,state space model approach is used to set up a state space model for ***,RUL of aero-engine is analyzed,and expected RUL and distribution of RUL are ***,the sate space model and KF algorithm are applied to an example of *** expected RUL is predicted,and corresponding probability density distribution(PDF)and cumulative distribution function(CDF)are *** result indicates that the accuracy of RUL prediction reaches 7.76%ahead 580 flight cycles(FC),which is more accurate than linear regression,and therefore shows the validity and rationality of the proposed method.

关键词： Prediction remaining noisy situations exhaust ahead rationality validity cumulative Bayesian

Toll-like receptor 4 polymorphisms to determine acute pancreatitis susceptibility and severity: A meta-analysis

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World Journal of Gastroenterology 2014年第21期20卷 6666-6670页

作者： xiao-Jin Zhou Yan Cui Li-Yi cai jing-Ying Xiang Yan Zhang Department of Gynecology and Obstetrics Wuxi Maternal and Child Health Hospitalthe Affiliated Hospital of Nanjing Medical University Department of Pharmacology College of Pharmaceutical SciencesSoochow University

AIM: To investigate the correlation of toll-like receptor 4 (TLR4) gene Asp299Gly and Thr399Ile polymorphisms and acute pancreatitis (AP) risk and severity.

关键词： Toll-like receptor 4 Acute pancreatitis Risk Single nucleotide polymorphisms

Localized amyloidosis affecting the lacrimal sac managed by endoscopic surgery:A case report

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World Journal of Clinical Cases 2020年第22期8卷 5684-5689页

作者： xiao-Le Song jing-Yi Yang Yu-Ting Lai Jia-Ying Zhou jing-jing Wang Xi-cai Sun De-Hui Wang Department of Otorhinolaryngology EyeEarNoseand Throat HospitalFudan UniversityShanghai 200031China

BACKGROUND Here we present a rare case of localized amyloidosis involving the nasolacrimal duct and lacrimal sac which was managed by endoscopic *** SUMMARY A 50-year-old man whose medical history included bilateral ventricular fold and vocal cord amyloidosis complained of bilateral *** resonance imaging revealed a neoplasm within the nasolacrimal *** positivity for Congo red staining and birefringence under a polarized microscope proved the diagnosis of *** via an endoscope obtained a favorable result.A one-year follow-up found no *** There are few reports on amyloidosis involving the lacrimal outflow system,and management and outcome are not *** dacryocystorhinostomy can be a choice to relieve *** follow-up and monitoring of systemic diseases are highly recommended.

关键词： Amyloidosis Nasolacrimal duct Nasolacrimal sac Endoscopy Dacryocystorhinostomy Case report

Liutex (vortex) core definition and automatic identification for turbulence vortex structures

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Journal of Hydrodynamics 2019年第5期31卷 857-863页

作者： Hongyi Xu xiao-shu cai Chaoqun Liu Aeronautics and Astronautics Department Fudan UniversityShanghai 200433China School of Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Mathematics University of Texas at ArlingtonArlington 76019TexasUSA

As a milestone research in vortex identification(VI),the physical quantity of Liutex,including its forms of scalar,vector and tensor,was systematically explored and rigorously obtained as the third-generation(3G)of the vortex definition and identification methods distinguished from the first generation(1G)by vorticity and the second generation(2G)by the vortex identification(VI)criteria solely dependent on the velocity gradient tensor *** on these findings,the vortex-core lines were abstracted from the well-defined Liutex,and for the first time,were automatically generated and massively visualized using *** distinctive characteristics of these vortex cores with the intriguing threshold-independency make them be the uniquely appropriate entity to represent and to depict the vortex structures in *** letter made use of the DNS data for the natural transition in a zero-pressure gradient flat-plate(Type-A turbulent boundary layer(TBL))and the fully-developed turbulence in a square annular duct(Type-B TBL)to demonstrate the vortex structure represented by the vortex-core *** 3G VI approach based on the vortex-core lines is capable of profoundly uncovering the vortex ***,the capability of automatically identifying the vortex cores and massively visualizing the large number of vortex-core behaviors in a transient way will enable the fluid-mechanics and other related-science communities to step into a new era to explore the intrinsic natures of the centennial puzzle of turbulence and other vortex-related phenomena in future.

关键词： Direct numerical simulation turbulence structure vortex core identification and automation