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Fabrication of magnetic multi-template molecularly imprinted polymer composite for the selective and efficient removal of tetracyclines from water

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Frontiers of Environmental science & Engineering 2021年第5期15卷 339-350页

作者： Guolong Zeng Yiyang Liu Xiaoguo Ma Yinming Fan School of Environmental science and Engineering Guangdong University of TechnologyGuangzhou510006China

Antibiotic contamination of the water environment has attracted much attention from researchers because of their potential hazards to humans and *** this study,a multi-template molecularly imprinted polymer(MIP)modified mesoporous silica coated magnetic graphene oxide(MGO@MS@MIP)was prepared by the surface imprinting method via a sol-gel process and was used for the selective,efficient and simultaneous removal of tetracyclines(TCs),including doxycycline(DC),tetracycline(TC),chlorotetracycline(CTC)and oxytetracycline(OTC)from *** synthesized MIP composite was characterized by Fourier transform infrared spectroscopy,transmission electron microscope and thermogravimetric *** adsorption properties of MGO@MS@MIP for these TCs were characterized through adsorption kinetics,isotherms and selectivity *** MIP composite revealed larger adsorption quantities,excellent selectivity and rapid kinetics for these four *** adsorption process was spontaneous and endothermic and followed the Freundlich isotherm model and the pseudo-second-order kinetic *** MGO@MS@MIP could specifically recognize DC,TC,CTC and OTC in the presence of some chemical *** addition,the sorption capacity of the MIP composite did not decrease significantly after repeated application for at least five ***,the prepared magnetic MIP composite has great potential to contribute to the effective separation and removal of tetracyclines from water.

关键词： Tetracyclines Removal Adsorption Molecularly imprinted polymer Magnetic graphene oxide

Quantum-mechanical understanding on structure dependence of image potentials of single-walled boron nitride nanotubes

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CHINESE PHYSICS B 2024年第12期33卷 128501-128501页

作者： Zhang, Yu Zhang, Zhiman Wang, Weiliang Zhang, Shaolin Huang, Haiming guangzhou Univ Sch Phys & Mat Sci Solid State Phys & Mat Res Lab Guangzhou 510006 Peoples R China guangzhou Univ Res Ctr Adv Informat Mat CAIM Huangpu Res & Grad Sch Guangzhou 510555 Peoples R China Sun Yat Sen Univ Ctr Neutron Sci & Technol Sch Phys Guangdong Prov Key Lab Display Mat & Technol Guangzhou 510275 Peoples R China

The recent discovery of field emission devices based on one-dimensional nanostructures has attracted much interest in emerging applications on next-generation flat panel displays, molecule-based sensors, and so forth. To achieve a comprehensive understanding of surface potentials at the nano-emitters during the tunneling process, in this study we systematically investigated the image potentials of single-walled boron nitride nanotubes with different edges, diameters and lengths in the frame of a composite first-principles calculation. The image potentials of zigzag single-walled boron nitride nanotubes are found to be dependent on the non-equivalent sides. Only the image potentials of isolated armchair single-walled boron nitride nanotube can be well fitted with the image potential of an ideal metal sphere of a size comparable to the tube diameter. On the contrary, the image potentials of zigzag and grounded armchair single-walled boron nitride nanotubes exhibit a strong length-dependence characteristic and are significantly different from that of an ideal metal sphere, which originates from the significant axial symmetry breaking of induced charge at the tip for the long tube. The correlation between the testing electron and electronic structure of single-walled boron nitride nanotube has also been discussed.

关键词： boron nitride nanotubes quantum chemistry image potentials structure dependence

From waste of marine culture to natural patch in cardiac tissue engineering

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Bioactive Materials 2021年第7期6卷 2000-2010页

作者： Yutong He Honghao Hou Shuqi Wang Rurong Lin Leyu Wang Lei Yu Xiaozhong Qiu Guangdong Provincial key Laboratory of Construction and Detection in Tissue Engineering Department of Anatomy School of Basic Medical SciencesSouthern Medical UniversityGuangdongGuangzhou510515China Guangdong Province key Laboratory of Marine Biotechnology Shantou UniversityShantou515063China School of Biomedical Engineering Southern Medical UniversityGuangzhou510005China

Sea squirt,as a highly invasive species and main biofouling source in marine aquaculture,has seriously threatened the biodiversity and aquaculture *** the other hand,a conductive biomaterial with excellent biocompatibility,and appropriate mechanical property from renewable resources is urgently required for tissue engineering *** meet these targets,we presented a novel and robust strategy for sustainable development aiming at the marine pollution via recycling and upgrading the waste biomass-sea squirts and serving as a renewable resource for functional bio-scaffold patch in tissue *** firstly demonstrated that the tunic cellulose derived natural self-conductive scaffolds successfully served as functional cardiac patches,which significantly promote the maturation and spontaneous contraction of cardiomyocytes both in vitro and enhance cardiac function of MI rats in *** believe this novel,feasible and“Trash to Treasure”strategy to gain cardiac patches via recycling the waste biomass must be promising and beneficial for marine environmental bio-pollution issue and sustainable development considering the large-scale consumption potential for tissue engineering and other applications.

关键词： Sea squirts Biofouling Cellulose Cardiac tissue engineering Myocardial infarction

Preparation and Activity of a Nanometer Anti-microbial Polyurethane

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Journal of Wuhan University of technology(Materials science) 2009年第4期24卷 540-545页

作者：关燕清彭长连 School of Life science South China Normal University MOE key laboratory of Laser Life science South China Normal University

A novel way for photo-immobilization with interferon- α（IFN- α） on the surface of polyurethane （PU） material, which makes PU condom more effective function in the future, was investigated. A kind of photoactive arylazide-4-azidobenzoic acid was modified to IFN- α with the confirmation of IR and Raman spectrum. Micro morphology of the photo-immobilized cell factors was observed by FESEM as well as CSLM at the level of nanometer. Finally, the product with elementary test of anti-microbial was also evaluated.

关键词： polyurethane (PU) interferon-α (IFN- α) photo-immobilization anti-microbial

Designing macrophage membrane-engineered ruthenium/selenium nanoparticles to block bone metastasis of breast cancer

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Nano Research 2024年第8期17卷 7504-7512页

作者： Meijin Yang Zhiying Tang Xiaoying Li Yanzi Yu Lizhen He Tianfeng Chen College of Chemistry and Materials science Department of Oncology of The First Affiliated HospitalJinan UniversityGuangzhou 510632China

Bone metastasis along with osteolysis is a common complication of advanced breast cancer,which directly destroys bone function and becomes one of the major causes of cancer-related *** is crucial to develop a new strategy to achieve effective cancer therapy and inhibition of osteolytic bone *** ruthenium(Ru)complexes exhibit therapeutic potential in cancer ***,the clinical applications of Ru complexes were limited by poor bioavailability,lacking targeting,nonspecific ***,in this study,engineering of cell membrane biomimetic modification was used to construct a highly biocompatible nanoplatform with carrying Ru metal complex of RuPOP and Se nanoparticles(SeNPs).Strikingly,the obtained RPSR nanoparticles can efficiently inhibit the proliferation,invasion and migration of breast cancer cells(MDA-MB-231 cells)in *** importantly,RPSR nanoparticles can induce cycle arrest,apoptosis by generating excessive intracellular(reactive oxygen species,ROS)to disrupt the normal redox balance and induce DNA damage in tumor ***,RPSR nanoparticles can also reshape bone microenvironment by regulating selenoproteins to inhibit osteoclasts and avoid osteolytic bone metastasis induced by tumor *** together,this study not only provides an effective cell membrane biomimetic strategy to enhance the shortcomings of metal complexes,but also demonstrates potential clinical significance for the combined treatment of anti-cancer and bone metastasis inhibition.

关键词： cell membrane nanoparticles biomimetic modification ruthenium complexes selenium nanoparticles tumor bone metastasis

Effect of Bionic Unit Shapes on Solid Particle Erosion Resistance of ZrO2-7wt%Y2O3 Thermal Barrier Coatings Processed by Laser

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Journal of Bionic Engineering 2018年第3期15卷 545-557页

作者： Panpan Zhang Fuhai Li Xiaofeng Zhang Zhihui Zhang Chaolin Tan Luquan Ren Yueliang Wang Wenyou Ma Min Liu The key Laboratory of Bionic Engineering (Ministry of Education China) Jilin University 5988 Renmin Street Changchun 130022 China Guangdong Institute of New Materials National Engineering Laboratory for Modern Materials Surface Engineering Technology the Key Lab of Guangdong for Modern Surface Engineering Technology Guangzhou 510651 China The State key Laboratory of Automotive Simulation and Control Jilin University 5988 Renmin Street Changchun 130022 China

Inspired by the coupling phenomena in biological systems, to improve the solid particle erosion resistance of Thermal Barrier Coatings （TBCs）, different kinds of bionic units were made on the coating surfaces using Bionic Coupled Laser Remelting （BCLR） process. The NiCoCrAlYTa/ZrO2-7wt%Y2O3 double-layer structured TBCs were prepared by air plasma spraying. The microstructure, microhardness and phase composition of the as-sprayed and bionic specimens were examined. The solid particle erosion behaviors of bionic specimens as function of bionic unit shape were investigated. The results indicated that the bionic specimens had better erosion resistance than the as-sprayed specimen. The specimen with striation and grid bionic units had the better erosion resistance, while the dot showed the worse. The bionic units were characterized by the dense columnar crystal structure and the high hardness, which are the main reasons for improving the erosion resistance. Under the synergistic action of the shear stress and normal stress on the protrusive coating surface, the erosion failure of the as-sprayed TBCs was proved to be the fracture and spallation of the splats. By contrast, the spallation of segmented bionic unit occurred in the overlapping area between the adjacent laser irradiation, and the erosive unit surface presented the clear and deep furrows, which revealed that the erosion failure mechanism of bionic TBCs was dominated by brittle and some ductile erosion. These results showed more opportunities for bionic application in improving the solid particle erosion resistance of components in the windy and sandy environment.

关键词： bionic thermal barrier coatings erosion resistance laser

Knowledge transferred adaptive filter pruning for CNN compression and acceleration

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science china(Information sciences) 2022年第12期65卷 315-316页

作者： Lihua GUO Dawu CHEN Kui JIA School of Electronic and information Engineering South China University of Technology

Dear editor,It is necessary to compress the convolutional neural network(CNN) for resource-constrained devices deployment, resulting in accelerated model training and inference. “Soft” filter pruning(SFP) [1] conducts dynamic pruning operations during training time, allowing updates of the pruned filters to compensate for any possible misoperation. However,

关键词： Information Systems and Communication Service

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Numerical simulation on the seismic absorption effect of the cushion in rigid-pile composite foundation

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Earthquake Engineering and Engineering Vibration 2016年第2期15卷 369-378页

作者： Han Xiaolei Li Yaokun Ji Jing Ying Junhao Li Weichen Dai Baicheng School of Civil Engineering and Transportation South China University of Technology Guangzhou 510641 China State key Laboratory of Subtropical Building science South China University of Technology Guangzhou 510641 China Yangjiang Power Supply Bureau of china Southern Power Grid Yangjiang Guangdong 529500 China

In order to quantitatively study the seismic absorption effect of the cushion on a superstructure, a numerical simulation and parametric study are carried out on the overall FEA model of a rigid-pile composite foundation in ABAQUS. A simulation of a shaking table test on a rigid mass block is first completed with ABAQUS and EERA, and the effectiveness of the Drucker-Prager constitutive model and the finite-infinite element coupling method is proved. Dynamic time-history analysis of the overall model under frequent and rare earthquakes is carried out using seismic waves from the El Centro, Kobe, and Bonds earthquakes. The different responses of rigid-pile composite foundations and pile-raft foundations are discussed. Furthermore, the influence of thickness and modulus of cushion, and ground acceleration on the seismic absorption effect of the cushion are analyzed. The results show that： 1） the seismic absorption effect of a cushion is good under rare earthquakes, with an absorption ratio of about 0.85; and 2） the seismic absorption effect is strongly affected by cushion thickness and ground acceleration.

关键词： acceleration shaking foundations rigid quantitatively completed modulus Prager Drucker thick

Synthesis of Metal Oxides@C(Metal=Ni,Fe) Based Prussian Blue Analogs as a High-performance Anode Material for Lithium-ion Battery

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 435-443页

作者： Wei Yang Xiaoxian Pang Zhao Xue Jinhao Ye Haosen Fan Ting Shu Wenzhi Zheng Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Patent Examination Cooperation(Henan)Center of the Patent Office Zhengzhou 450046China key Laboratory of Fuel Cell technology of Guangdong Province Guangzhou 510640China

Ni3[Fe(CN)6]2 nano-cubic precursors were prepared by chemical coprecipitation at room temperature with nickel acetate and potas sium ferricyanide as raw *** corresponding NiFe2O4-NiO@C composites with excellent crystallization were prepared by two-stage oxidation at low *** microstructure and electrochemical behavior of the materials showed that the Prussian blue analog was transformed into metal oxide while the carbon coating was maintained in the twostage oxidation at low *** existence of the carbon coating reduces the charge transfer impedance to 31.5 Ω.At the current density of 500 mA/g,the reversible capacity of 632.7 mAh/g is maintained after 500 *** the same time,carbon cladding can also enhance the role of pseudocapacitance in the *** the scanning rate of 0.1 mV/s,the pseudocapacitance account for 54.4% of the total discharge capacity,which is significantly higher than that of uncoated materials.

关键词： Lithium-ion battery Anode materials Metal oxide Prussian blue