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New insights on the enhanced non-hydroxyl radical contribution under copper promoted TiO_(2)/GO for the photodegradation of tetracycline hydrochloride

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Journal of Environmental Sciences 2021年第2期33卷 99-109页

作者： Sijia Qian Shengyan Pu Ying Zhang Peng Wang Yingchen Bai Bo Lai State Key laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China State Key laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Enuironmental SciencesBeijing 100012China State Key laboratory of Hydraulics and Mountain River Engineering College of Architecture and EnuironmentSichuan Universitychengdu 610065China

TiO_(2)/graphene oxide(GO)as photocatalyst in the photo-degradation of multitudinous pollutants has been extensively *** its low photocatalytic efficiency is attributed to the high band gap energy which lead to low light ***-TiO_(2)/GO was synthesized via the impregnation methods to enhance the catalytic *** Cu-TiO_(2)/GO reaction rate constant for photo-degradation of pollutants(tetracycline hydrochloride,TC)was about 1.4 times that of TiO_(2)/*** 90 min,the removal ratio of Cu-TiO_(2)/GO for TC was 98%,and the maximum degradation ratio occurred at p H *** five cycles,the removal ratio of Cu-Ti O_(2)/GO still exceeded 98%.UV-visible adsorption spectra of Cu-Ti O_(2)/GO showed that its band gap was narrower than TiO_(2)/*** paramagnetic resonance(EPR)spectra test illustrated the generation rate of·O_(2)^(-)and·OH was higher in Cu-TiO_(2)/GO system than TiO_(2)/GO and TiO_(2) *** contribution sequence of oxidative species was·O_(2)^(-)>holes(h+)>·OH in both TiO_(2)/GO and Cu-Ti O_(2)/GO ***,the contribution of·OH in Cu-TiO_(2)/GO was less than that in TiO_(2)/GO during the photo-degradation *** phenomenon was attributed to the better adsorption performance of Cu-Ti O_(2)/GO which could reduce the accessibility of TC to·OH in *** enhanced non-hydroxyl radical contribution could be attributed to that the more other active species or sites on(nearby)the surface of Cu-TiO_(2)/GO generated after doping *** results provide a new perspective for the tradition metal-doped conventional catalysts to enhance the removal of organic pollutants in the environment.

关键词： Traditional metal doping TiO_(2) Graphene oxide Non–hydroxyl radical Tetracycline hydrochloride

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Concentration polarization of atherogenic lipids in the arterial system

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Science China(Life Sciences) 2003年第2期46卷 153-164页

作者：邓小燕王贵学 Key lab for Biomechanics & Tissue Engineering of Ministry of Education Chongqing University Chongqing 400044 ChinaState Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116023 China Key lab for Biomechanics & Tissue Engineering of Ministry of Education Chongqing University Chongqing 400044 China

The transport of atherogenic lipids (LDL) in a straight segment of an artery with a semi-permeable wall was simulated numerically. The numerical analysis predicted that a mass transport phenomenon called 慶oncentration polarization?of LDL might occur in the arterial system. Under normal physiological flow conditions, the luminal surface LDL concentration was 5%—14% greater than the bulk concentration in a straight segment of an artery. The luminal surface LDL concentration at the arterial wall was flow-dependent, varying linearly with the filtration rate across the arterial wall and inversely with wall shear rate. At low wall shear rate, the luminal surface LDL concentration was very sensitive to changes in flow conditions, decreasing sharply as wall shear rate increased. In order to verify the numerical analysis, the luminal surface concentration of bo-vine serum albumin (as a tracer macromolecule) in the canine carotid artery was measured in vitro by directly taking liquid samples from the luminal surface of the artery. The experimental result was in very good agreement with the numerical analysis. The authors believe that the mass transport phenomenon of 慶oncentration polarization?may indeed exist in the human circulation and play an important role in the localization of atherosclerosis.

关键词： mass transport, concentration polarization, wall shear rate, atherosclerosis.

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Green Synthesis of Magnetic Adsorbent Using Groundwater Treatment Sludge for Tetracycline Adsorption

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Engineering 2019年第5期5卷 880-887页

作者： Zhan Qu Yaqiong Wu Suiyi Zhu Yang Yu Mingxin Huo Leilei Zhang Jiakuan Yang Dejun Bian Yi Wang Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection Northeast Normal UniversityChangchun 130117China School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Engineering lab for Water Pollution Control and Resources Recovery Northeast Normal UniversityChangchun 130117China Guangdong Shouhui Lantian Engineering and Technology Corporation Guangzhou 510075China

Groundwater treatment sludge is an industrial waste that is massively produced from groundwater treatment *** methods for treatment of this sludge,such as discharge into deep wells or the sea,or disposal at landfills,are not environmentally ***,we demonstrate an alternative strategy to recycle the sludge by preparing a magnetic maghemite adsorbent via a one-step hydrothermal method with NaOH solution as the only *** this method,the weakly magnetized sludge,which contained 33.2%iron(Fe)and other impurities(e.g.,silicon(Si),aluminum(Al),and manganese(Mn)),was converted to magnetic adsorbent(MA)with the dissolution of Si/Al oxides(e.g.,quartz and albite)into the liquid *** a NaOH concentration of 2 mol L^-1,approximately 18.1%of the ferrihydrite in the Fe oxides of the sludge was converted into 11.2%maghemite and 6.9%hematite after the hydrothermal ***2(i.e.,MA produced by a 2 mol L^-1 NaOH concentration)exhibited a good magnetic response of 8.2 emu g^-1(1 emu=10^-3 A m^2),and a desirable surface site concentration of 0.75 mmol g^-*** synthesized MA2 was used to adsorb the cationic pollutant tetracycline(TC).The adsorption kinetics of TC onto MA2 fitted well with a pseudo-second-order model,and the adsorption isotherms complied well with the Langmuir *** maximum adsorption capacity of MA2 for TC was 362.3 mg g^-1,and the main mechanism for TC adsorption was cationic *** study is the first to demonstrate the preparation of an MA from recycled sludge without a reductant and/or exogenous Fe *** prepared adsorbent can be used as a low-cost adsorbent with high capacity for TC sorption in the treatment of TC-containing wastewater.

关键词： Groundwater treatment sludge Maghemite Cationic exchange Adsorption Tetracycline

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Superconductivity in One-atomic-layer Metal Films

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Bulletin of the Chinese Academy of Sciences 2011年第4期25卷 301-303页

作者： ZHANG Tong CHENG Peng LI Wenjuan SUN Yujie WANG Guang ZHU Xiegang HE Ke WANG Lili MA Xucun CHEN Xi WANG Yayu LIU Ying LIN Haiqing JIA Jinfeng XUE Qikun State Key lab of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084 P. R. China Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China Department of Physics and Material research Institute The Pennsylvania State University Pennsylvania 16802 USA Department of Physics The Chinese University of Hong Kong Hong Kong E R. China

Superconductivity is a peculiar quantum phenomenon which originates from the pairing of conduction electrons, followed by phase coherent condensation. Since the discovery by K. Onnes in 1911, superconductivity has been one of the hottest topics in physics for an entire century, and still attracts people's great interest. One of the intriguing issues is

关键词：超导金属薄膜原子层量子尺寸效应传导电子量子现象相位相干界面效应

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Sulfonic acid-functionalized core-shell Fe_(3)O_(4)@carbon microspheres as magnetically recyclable solid acid catalysts

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Chinese Chemical Letters 2021年第6期32卷 2079-2085页

作者： Chenyi Yuan Xiqing Wang Xuanyu Yang Abdulaziz AAlghamdi Fahad AAlharthi Xiaowei Cheng Yonghui Deng Department of Chemistry State Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200433China State Key lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Department of Chemistry College of ScienceKing Saud UniversityPO Box 2455Riyadh 11451Saudi Arabia

Green and recyclable solid acid catalysts are in urgent demand as a substitute for conventional liquid mineral *** this work,a series of novel sulfonic acid-functionalized core-shell Fe_(3)O_(4)@carbon microspheres(Fe_(3)O_(4)@C-SO_(3)H)have been designed and synthesized as an efficient and recyclable heterogeneous acid *** the synthesis,core-shell Fe_(3)O_(4)@RF(resorcinol-formaldehyde)microspheres with tunable shell thickness were achieved by interfacial polymerization on magnetic Fe_(3)O_(4)*** high-temperature carbonization,the microspheres were eventually treated by surface sulfonation,re sulting in Fe_(3)O_(4)@C-x-SO_(3)H(x stands for carbonization temperature)microspheres with abundant surface SO_(3)H *** obtained microspheres possess uniform core-shell structure,partially-graphitized carbon skeletons,superparamagnetic property,high magnetization saturation value of 10.6 emu/g,and rich SO_(3)H *** surface acid amounts can be adju sted in the range of 0.59-1.04 mmol/g via sulfonation treatment of carbon shells with different graphitization *** magnetic Fe_(3)O_(4)@C-x-SO_(3)H microspheres were utilized as a solid acid catalyst for the acetalization reaction between benzaldehyde and ethylene glycol,demonstrating high selectivity(97%)to benzaldehyde ethylene glycol *** importantly,by applying an external magnetic field,the catalysts can be easily separated from the heterogeneous reaction solutions,which later show well preserved catalytic activity even after 9 cycles,revealing good recyclability and high stability.

关键词： Core-shell Fe_(3)O_(4)@carbon Interfacial polymerization Magnetic microspheres Recyclability Solid acid catalyst Sulfonic acid-functionalization

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Infrared transition properties of vanadium dioxide thin films across semiconductor-metal transition

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Rare Metals 2011年第3期30卷 247-251页

作者： LIANG Jiran HU Ming KAN Qiang LIANG Xiuqin WANG Xiaodong LI Guike CHEN Hongda School of Electronic and Information Technology Tianjin University Tianjin 300072 China State Key laboratory of Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China Engineering research Center for Semiconductor Integrated Technology Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China State Key laboratory for Super Lattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

Vanadium dioxide thin films were fabricated through annealing vanadium oxide thin films deposited by dual ion beam sputtering. X-ray diffraction （XRD）, atom force microscopy （AFM）, and Fourier transform infrared spectrum （FTIR） were employed to measure the crystalline structure, surface morphology, and infrared optical transmittance. The phase transition properties were characterized by transmittance. The results show that the annealed vanadium oxide thin film is composed of monoclinic VO2, with preferred orientation of （011）. The maximum of transmittance change is beyond 65% as the temperature increases from 20 to 80 C. The reversible changes in optical transmittance against temperature were observed. The change rate of transmittance at short wavelength is higher than that at long wavelength at the same temperature across semiconductor-metal phase transition. This phenomenon was discussed using diffraction effect.

关键词： vanadium dioxide infrared transition diffraction effect dual ion beam sputtering annealing

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Recent understanding of solid-liquid friction in ionic liquids

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Green Chemical Engineering 2021年第2期2卷 145-157页

作者： Yuqing He Han Li Cangyu Qu Wei Cao Ming Ma State Key laboratory of Tribology Tsinghua UniversityBeijing100084China Department of Mechanical Engineering Tsinghua UniversityBeijing100084China Center for Nano and Micro Mechanics Tsinghua UniversityBeijing100084China Department of Engineering Mechanics Tsinghua UniversityBeijing100084China Department of Physical Chemistry School of ChemistryTel Aviv UniversityTel Aviv6997801Israel Institute of Superlubricity Technology Research Institute of Tsinghua University in ShenzhenShenzhen518000China

Ionic liquids(ILs)-solid interfacial phenomenon is undoubtedly one of the topic issues in energy related fields,especially bringing great challenges in the development of chemical ***-ILs friction under microscale shows outstanding properties such as widely studied electro-controllability by surface potential or electric field,and promising performance of *** applications,such as boundary lubrication and supercapacitors,have been benefiting from these *** this review,we summarized the recent advances of the measurements of solid-ILs friction,and focused on the microscale and fascinating findings.A brief tutorial for this topic,containing both experimental and theoretical methods,was also *** was anticipated that this review would help researchers grasp the emerging field and stimulate the advance of new ideas and methods in ILs on solids.

关键词： Lubrication Ionic liquids Tribology Supercapacitors Nanoscale

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Epoxy resin nanocomposites reinforced with ionized liquid stabilized carbon nanotubes

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International Journal of Smart and Nano Materials 2011年第3期2卷 176-193页

作者： Zhe Wang Xiongtao Yang Qiang Wang H.Thomas Hahn Sang-gi Lee Kun-Hong Lee Zhanhu Guo Mechanical&Aerospace Engineering Department University of California Los AngelesLos AngelesCA 90095USA Integrated Composites lab Dan F.Smith Department of Chemical EngineeringLamar UniversityBeaumontTX 77710USA Institute of Chemical and Engineering Sciences(ICES) A-STARApplied Catalysis1Pesek RoadJurong Island627833 Singapore Department of Chemistry and Nano Science Ewha Womans UniversitySeoul 120-750Korea Department of Chemical Engineering Pohang University of Science and TechnologyPohang 790-784Korea

Epoxy resin nanocomposites reinforced with three different ionic liquid functionalized carbon nanotubes(f-CNTs)were fabricated by an in situ polymerization *** influence of the anions on the curing process was studied through differential scanning calorimetry(DSC)and normalized Fourier transform infrared(FTIR)*** composition of the nanocomposites was analyzed by X-ray photoelectron *** different mechanisms are proposed to explain the curing process of the neat epoxy and its *** electric conductivity and mechanical properties of the nanocomposites are also *** tensile strength was increased dramatically due to the insertion of *** electron microsopy fracture surface analysis indicates a strong interfacial bonding between the carbon nanotubes and the polymer matrix.

关键词： epoxy resin nanocomposite carbon nanotube ionic liquid functionalization

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Integrated microdevice with a windmill-like hole array for the clog-free,efficient,and self-mixing enrichment of circulating tumor cells

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Microsystems & Nanoengineering 2022年第1期8卷 291-304页

作者： Hao Li Jinze Li Zhiqi Zhang Zhen Guo Changsong Zhang Zixu Wang Qiuquan Guo Chao Li Chuanyu Li Jia Yao Anran Zheng Jingyi Xu Qingxue Gao Wei Zhang Lianqun Zhou School of Biomedical Engineering(Suzhou) Division of Life Sciences and MedicineUniversity of Science and Technology of China260026 HefeiChina CAS Key lab of Bio-Medical Diagnostics Suzhou Institute of Biomedical Engineering and TechnologyChinese Academy of Sciences215163 SuzhouChina Ji Hua laboratory 528000 FoshanChina Department of laboratory Medicine The Affiliated Suzhou Science and Technology Town HospitalNanjing Medical University215153 SuzhouChina Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China518000 ShenzhenChina Suzhou CASENS Co. Ltd215163 SuzhouChina Jinan Guoke Medical Technology Development Co. Ltd250001 JinanChina

Circulating tumor cells(CTCs)have tremendous potential to indicate disease progression and monitor therapeutic response using minimally invasive *** the limitations of affinity strategies based on their cost,effectiveness,and simplicity,size-based enrichment methods that involve low-cost,label-free,and relatively simple protocols have been further ***,the key challenges of these methods are clogging issues and cell aggregation,which reduce the recovery rates and *** by the natural phenomenon that the airflow around a windmill is disturbed,in this study,a windmill-like hole array on the SU-8 membrane was designed to perturb the fluid such that cells in a fluid would be able to self-mix and that the pressure acting on cells or the membrane would be dispersed to allow a greater *** addition,based on the advantages of fluid coatings,a lipid coating was used to modify the membrane surface to prevent cell aggregation and clogging of the *** the optimal conditions,recovery rates of 93%and 90%were found for A549 and HeLa cells in a clinical simulation test of our platform with a CTC concentration of 20-100 cells per milliliter of *** white blood cell(WBC)depletion rate was 98.7%(n=15),and the CTC detection limit was less than 10 cells per milliliter of blood(n=6).Moreover,compared with conventional membrane filtration,the advantages of the proposed device for the rapid(2 mL/min)and efficient enrichment of CTCs without clogging were shown both experimentally and *** to its advantages in the efficient,rapid,uniform,and clog-free enrichment of CTCs,our platform offers great potential for metastatic detection and therapy analyses.

关键词： logging free aggregation

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surface lattice resonance of circular nano-array integrated on optical fiber tips

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Chinese Physics B 2023年第12期32卷 299-304页

作者：吴坚叶高杰庞修洋阚雪芬陆炎史健俞强殷澄王贤平 College of Advanced Interdisciplinary Studies Nanhu Laser LaboratoryHunan Provincial Key Laboratory of High Energy Laser TechnologyNational University of Defense TechnologyChangsha 410073China College of Internet of Things Engineering Hohai UniversityChangzhou 213022China School of Transportation Engineering Jiangsu Shipping CollegeNantong 226010China Jiangxi Key laboratory of Photoelectronics and Telecommunication College of Physics and Communication ElectronicsJiangxi Normal UniversityNanchang 330022China i-lab&Key laboratory of Nanodevices and Applications&Key laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

As metallic nanoparticles are arranged to form a 2D periodic nano-array,the coupling of the localized surface plasmonic resonance(LSPR)results in the well-known phenomenon of surface lattice resonances(SLRs).We theoretically investigate the SLR effect of the circular nano-array fabricated on the fiber *** difference between the 2D periodic and circular periodic arrays results in different resonant *** both structures,the resonant peaks due to the SLRs shift continuously as the array structures are *** some specific arrangements,the circular nano-array may generate a single sharp resonant peak with extremely high enhancement,which originates from the collective coupling of the whole *** interestingly,the spatial pattern of the vector near-field corresponding to the sharp peak is independent of the polarization state of the incidence,facilitating its excitation and *** finding may be helpful for designing multifunctional all-fiber devices.

关键词： fiber tip lattice resonance metallic nanoparticles vector field

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