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Chinese Journal of Chemical Engineering 2022年第12期52卷 10-18页

作者： Shusheng Li Rui Kuang Xiangzheng Kong Xiaoli Zhu Xubao Jiang College of Chemistry and Chemical Engineering University of JinanJinan 250022China College of Traffic Civil Engineering Shandong Jiaotong UniversityJinan 250357China

Highly efficient and robust electrocatalysts have been in urgent demand for oxygen evolution reaction(OER).For this purpose,high-cost carbon materials,such as graphene and carbon nanotubes,have been used as supports to metal oxides to enhance their catalytic *** report here a new Co_(3)O_(4)-based catalyst with nitrogen-doped porous carbon material as the support,prepared by pyrolysis of porous polyurea(PU) with Co(NO_(3))_(2)immobilized on its *** this end,PU was first synthesized,without any additive,through a very simple one-step precipitation polymerization of toluene diisocyanate in a binary mixture of H2O-acetone at room *** immersing PU in an aqueous solution of Co(NO_(3))_(2)at room temperature,a cobalt coordinated polymer composite,Co(NO_(3))_(2)/PU,was obtained,which was heated at 500℃ in air for 2 h to get a hybrid,Co_(3)O_(4)/NC,consisting of Co_(3)O_(4)nanocrystals and sp2-hybridized N-doped *** this Co_(3)O_(4)/NC as a catalyst in OER,a current density of10 mA·cm^(-2)was readily achieved with a low overpotential of 293 mV with a Tafel slope of87 mV·dec^(-1),a high catalytic *** high performance was well retained after 1000 recycled uses,demonstrating its good *** work provides therefore a facile yet simple pathway to fabrication of a new transition metal oxides-based N-doped carbon catalyst for OER with high performance.

关键词： Porous polyurea N-doped carbon-Co_(3)O_(4)hybrid Oxygen evolution Catalyst Electrolysis Electrochemistry

In vitro and In vivo Evaluation of the Developed PLGA/HAp/Zein Scaffolds for Bone-Cartilage Interface Regeneration

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Biomedical and Environmental sciences 2015年第1期28卷 1-12页

作者： LIN Yong Xin DING Zhi Yong ZHOU Xiao Bin LI Si Tao XIE De Ming LI Zhi Zhong SUN Guo Dong Department of Orthopedics the First Affiliated Hospital of Jinan University Department of Traumatology Hui Zhou Municipal Central Hospital Department of Pediatrics the Sixth Affiliated Hospital of Sun Yat-sen University Department of Biomedical Engineering College of Life Science and Technology Jinan University

Objective To investigate the effect of electronspun PLGA/HAp/Zein scaffolds on the repair of cartilage defects. Methods The PLGA/HAp/Zein composite scaffolds were fabricated by electrospinning method. The physiochemical properties and biocompatibility of the scaffolds were separately characterized by scanning electron microscope （SEM）, transmission electron microscope （TEM）, and fourier transform infrared spectroscopy （FTIR）, human umbilical cord mesenchymal stem cells （hUC-MSCs） culture and animal experiments. Results The prepared PLGA/HAp/Zein scaffolds showed fibrous structure with homogenous distribution, hUC-MSCs could attach to and grow well on PLGA/HAp/Zein scaffolds, and there was no significant difference between cell proliferation on scaffolds and that without scaffolds （P〉0.05）. The PLGA/HAp/Zein scaffolds possessed excellent ability to promote in vivo cartilage formation. Moreover, there was a large amount of immature chondrocytes and matrix with cartilage lacuna on PLGA/HAp/Zein scaffolds. Conclusion The data suggest that the PLGA/HAp/Zein scaffolds possess good biocompatibility, which are anticipated to be potentially applied in cartilage tissue engineering and reconstruction.

关键词： hUC-MSCs Electrospun PLGA/HAp/Zein grafts Cartilage tissue engineering Chondrocyte

Comparison of the effects of pre-activators on morphology and corrosion resistance of phosphate conversion coating on magnesium alloy

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Journal of Magnesium and Alloys 2022年第12期10卷 3485-3494页

作者： Tao Li Zhongjun Leng Shifang Wang Xitao Wang Reza Ghomashchi Yuansheng Yang Jixue Zhou Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials Advanced Materials InstituteQilu University of Technology(Shandong Academy of Sciences)Jinan 250014China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Mechanical Engineering The University of AdelaideAdelaide SA 5005Australia

In this study, Mg–6.0Zn–3.0Sn–0.5Mn(ZTM630) magnesium alloy was pre-activated by colloidal Ti, oxalic acid, and phosphoric acid,and a phosphate conversion coating(PCC) was prepared on the alloy surface. The morphology and corrosion resistance of the prepared PCCs were investigated. Surface morphology studies showed that the phosphate crystals that formed the coating were the smallest for the sample pre-activated by phosphoric acid. The coating on the colloidal Ti and the phosphoric acid samples had the largest and the smallest thickness and surface roughness, respectively. The reason for the discrepancy was analyzed by comparing the surface morphologies of alloy samples immediately after the pre-activation treatment and various phosphating treatments. X-ray diffraction analysis revealed that all three PCCs contained the same compounds. The corrosion resistance time from the copper sulfate drop test and the electrochemical data from the potentiodynamic polarization curves showed that the coating pre-activated by phosphoric acid had the best corrosion resistance. Finally, the 1500 h neutral salt spray corrosion test confirmed that the phosphating treated magnesium alloy, which was pre-activated by phosphoric acid,exhibited excellent corrosion resistance and behavior.

关键词： Phosphate conversion coating Surface pre-activator Magnesium alloy Morphology Corrosion

Eutectic-derived high-entropy nanoporous nanowires for efficient and stable water-to-hydrogen conversion

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Nano Research 2022年第6期15卷 4820-4826页

作者： Ying Wang Bin Yu Ming He Zhihua Zhai Kuibo Yin Fangong Kong Zhonghua Zhang State Key Laboratory of Biobased Material and Green Papermaking Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China SEU-FEI Nano-Pico Center Key Lab of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096China

Combining multiple metal elements into one nanostructure merits untold application potential but is still a challenge for the traditional bottom-up synthesis ***,we propose a eutectic-directed self-templating strategy to prepare two multicomponent nanostructured alloys(PtPdRhIrNi(D-SN)and NiPtPdRhIrAl(D-SS))through the combination of rapid solidification with *** PtPdRhIrNi nanoporous nanowires(NPNWs)represent a new family of high-entropy alloys(HEAs)containing delicate hierarchical nanostructure with ultrafine ligament sizes of~2 nm in addition to one-dimensional(1D)***,the PtPdRhIrNi NPNWs display excellent electrocatalytic activity and stability toward hydrogen evolution reaction,with the low overpotential of 22 and 55 mV to afford a current density of 10 mA·cm^(−2)in 0.5 M H_(2)SO_(4)and 1.0 M KOH electrolytes,*** enhanced electrocatalytic performance can be attributed to the high-entropy effect favoring the surface electronic structure for the optimized activity,the promotion impact of Ni,1D morphology facilitating the electron transport,and the nanoporous structure promoting the electrolyte diffusion.

关键词： high-entropy alloy nanoporous nanowires dealloying electrocatalyst hydrogen evolution reaction

Hypercrosslinking Polymers Fabricated from Divinyl Benzene via Friedel-Crafts Addition Polymerization

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Chinese Journal of Polymer science 2022年第3期40卷 310-320,I0008页

作者： Zheng-Yu Duan Yan-Yan Wang Qi-Wei Pan Yun-Feng Xie Zhi-Yong Chen Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China Nutrition&Health Research Institute COFCO CorporationBeijing Key Laboratory of Nutrition&Health and Food SafetyBeijing 102209China

Microporous organic polymers with high surface area are widely used in many *** them,hypercrosslinked polymers have been extensively concerned because of their simple processes and low-cost ***,due to most state-of-the-art strategies for HCPs based on condensation reactions,the release of small molecules such as hydrochloric acid and methanol involved in such strategies brings about new hazards to ***,we propose a method of fabrication of hypercrosslinked polymers via self-addition polymerization of divinyl benzene and its crosslinking with polar aromatic *** hypercrosslinked polyDVB-based products are demonstrated by FriedelCrafts addition reaction of double bonds on DVB that can connect adjacent phenyl rings of aromatic molecules to form the crosslinked *** HCPDVB-CB obtained in 1-chlorobutane as solvent has a high micropore content and displays high surface area up to 931 m^(2)/*** this finding,DVB is used as a novel external crosslinker for knitting polar aromatic *** L-phenylalanine and bisphenol A are used as the aromatic units,the obtained HCP(Phe-DVB)and HCP(BPA-DVB)could reach surface area of 612 and 471 m^(2)/g,and have hydrogen uptake of0.62 wt%and 0.58 wt%at 77 K and 1.13 bar by comparison with HCPDVB-CB having hydrogen uptake of 0.30 wt%,respectively.

关键词： Hypercrosslinked polymers Divinyl benzene Friedel-Crafts alkylation Microporous organic polymers Gas storage

Magneto-volume effect in Fe_(n)Ti_(13-n)clusters during thermal expansion

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Chinese Physics B 2023年第4期32卷 78-86页

作者：黄建蒋妍彦李志超张迪钱俊平李辉 Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong UniversityJinan 250061China

Ab initio molecular dynamics calculations have been carried out to search for the ground state structure of Fe_(n)Ti_(13-n)clusters and measure the thermal expansion of Fe_(n)Ti_(13-n).The volume of Fe_(n)Ti_(13-n)clusters during thermal expansion is jointly determined by anharmonic interaction and magneto-volume *** has been found that Fe_(6)Ti_(7),Fe_9Ti_(4),Fe_(11)Ti_(2),and Fe_(13)clusters can exhibit the remarkable magneto-volume effect with abnormal volume behaviors and magnetic moment behaviors during thermal expansion.A prerequisite for the magneto-volume effect of Fe_(n)Ti_(13-n)clusters during thermal expansion has been revealed and the magnitude of the magneto-volume is also approximately ***,the magneto-volume behaviors of Fe_(n)Ti_(13-n)clusters are qualitatively characterized by the energy contour *** results shed light on the mechanism of the magneto-volume effect in Fe_(n)Ti_(13-n)clusters during thermal expansion,which can guide the design of nanomaterials with zero expansion or even controllable expansion properties.

关键词： Fe_(n)Ti_(13-n)cluster thermal expansion magneto-volume effect magnetic moment

Association of cystatin C level and cardiovascular prognosis for patients with preexisting coronary heart disease:a meta-analysis

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Chinese science Bulletin 2014年第5期59卷 539-545页

作者： Ruijian Li Panpan Hao Yuguo Chen Yun Zhang Department of Emergency Qilu Hospital of Shandong University Key Laboratory of Cardiovascular Remodeling and Function Research Chinese Ministry of Education and Chinese Ministry of Health Qilu Hospital of Shandong University

The association of circulating levels of cystatin C(CysC)and risk of recurrent cardiovascular events in patients with preexisting coronary heart disease are *** qualitatively and quantitatively address this issue,we performed a random meta-analysis of results from prospective studies on the *** searched electronic and printed sources(up to 16 October 2011)using keywords and retrieved articles for seven prospective studies according to the selection *** were abstracted and meta-analysis was performed using the random-effects model(RevMan 5.0.23 software).The cohorts involved 4,576 patients with preexisting coronary heart disease(CHD)and normal or mild chronic kidney disease,and follow-up ranged from 5.6 to 40.6 *** versus lowest baseline CysC level was significantly associated with increased risk of cardiovascular events(OR 2.30,95%CI 1.80–2.94),all-cause mortality(OR 5.69,95%CI 3.70–8.74),but not with recurrent MI(OR 1.75,95%CI 0.77–4.00).In heterogeneity testing for studies reporting cardiovascular events and all-cause mortality,no significant heterogeneity was found,and exclusion of any single study did not alter the overall *** risk of recurrent MI,significant heterogeneity was found among the five trials(v2=13.16,P=0.01,I2=70%)and exclusion of the Taglieri et al.[12]study from the analysis resulted in a rise in relative risk(OR 2.36,95%CI 1.09–5.15).In conclusion,for patients with established CHD,high baseline level of CysC is associated with increased risk of cardiovascular events and all-cause death during long-term follow-up.

关键词：心脏疾病冠状动脉心血管患者随机效应模型水预后 Meta分析

Injectable“cocktail”hydrogel with dual-stimuli-responsive drug release,photothermal ablation,and drug-antibody synergistic effect

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SmartMat 2024年第2期5卷 43-53页

作者： Li Zhao Jiawen Xu Yao Tong Pengyu Gong Fucheng Gao Hui Li Yanyan Jiang Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinanChina Department of Pathology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina Department of Clinical Laboratory The Second HospitalCheeloo College of MedicineShandong UniversityJinanChina

The combination of the first-line standard chemotherapeutic drug doxorubicin hydrochloride(DOX)and the molecular-targeted drug Herceptin(HCT)has emerged as a promising strategy for human epidermal growth receptor 2(HER-2)overexpressing breast cancer ***,insufficient drug accumulation and severe cardiotoxicity are two major challenges that limit its clinical ***,an in situ forming gold nanorods(AuNRs)-sodium alginate(ALG)hybrid hydrogel encapsulating DOX and HCT was engineered for tumor synergistic therapy involving injectable,dual-stimuli-responsive drug release,photothermal ablation,and drug-antibody synergistic *** photothermal agent AuNRs,anticancer drug DOX,and anticancer antibody HCT were mixed in ALG solution,and after injection,the soluble ALG was quickly transformed into a hydrogel in the presence of Ca^(2+)in the ***,the hybrid hydrogel exhibits an extremely high photothermal conversion efficiency of 70%under 808 nm laser *** thermal effect can also provide photothermal stimulation to trigger the drug release from the gel *** addition,the drug release rate and the releasing degree are also sensitive to the *** vitro studies demonstrated that the PEI-AuNR/DOX/HCT/ALG hydrogel has facilitated the therapeutic efficiency of each payload and demonstrated a strong synergistic killing effect on SK-BR-3 *** vivo imaging results showed that the local drug delivery system can effectively reduce the nonspecific distribution in normal tissues and increase drug concentration at tumor *** proposed hydrogel system shows significant clinical implications by easily introducing a sustainable photothermal therapy and a potential universal carrier for the local delivery of multiple drugs to overcome the challenges faced in HER-2 overexpressing cancer therapy.

关键词： dual-stimuli-responsive drug release HER-2 overexpressing breast cancer injectable hydrogel photothermal therapy synergistic effect

Recent advances in organic electrosynthesis using heterogeneous catalysts modified electrodes

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Chinese Chemical Letters 2023年第4期34卷 35-52页

作者： Li Ma Xianang Gao Xin Liu Xiaojun Gu Baoying Li Beibei Mao Zeyuan Sun Wei Gao Xiaofei Jia Jianbin Chen Shandong Provincial Key Laboratory of Molecular Engineering State Key Laboratory of Biobased Material and Green PapermakingSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Ji’nan250353China College of Pharmacy Shandong University of Traditional Chinese MedicineJi’nan250355China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China

Organic electrosynthesis as an emerging green and advantageous alternative to traditional synthetic methods has achieved remarkable progress in recent years because sustainable electricity can be employed as traceless redox agents. To surmount the over-oxidation/reduction issues of direct electrolysis,mediated or indirect electrochemical processes are attaining remarkable significance and promoting the selectivity of products. Molecular electrocatalysts, benefiting from the easily electronic and steric modulation, suffers from readily degradation issue in most cases. Remarkably, heterogeneous catalysts have drawn more attention due to their high activity, stability, and recyclability. Hence, in this review, the most recent growth of heterogeneous catalysts modified electrodes for organic electrosynthesis were summarized, highlighting structural optimization and electrochemical performance of these materials as well as reaction mechanism. Furthermore, key challenges and future directions in this area were also discussed.

关键词： Organic electrosynthesis Indirect electrosynthesis Heterogeneous catalysis Hybrid materials Electrocatalysis

Ligand-field regulated superalkali behavior of the aluminum-based clusters with distinct shell occupancy

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Chinese Chemical Letters 2022年第12期33卷 5147-5151页

作者： Jun Li Mingwei Cui Huan Yang Jing Chen Shibo Cheng School of Chemistry and Chemical Engineering Shandong UniversityJi'nan 250100China School of Physics Shandong UniversityJi'nan 250100China

Protecting clusters from coalescing by ligands has been universally adopted in the chemical synthesis of atomically precise *** from the stabilization role,the effect of ligands on the electronic properties of cluster cores in constructing superatoms,however,has not been well *** this letter,a comprehensive theoretical study about the effect of an organic ligand,methylated N-heterocyclic carbene(C_(5)N_(2)H_(8)),on the geometrical and electronic properties of the aluminum-based clusters XAl_(12)(X=Al,C and P)featuring different valence electron shells was conducted by utilizing the density functional theory(DFT)*** was observed that the ligand can dramatically alter the electronic properties of these aluminum-based clusters while maintaining their structural *** intriguingly,different from classical superatom design strategies,the proposed ligation strategy was evidenced to possess the capability of remarkably reducing the ionization potentials(IP)of these clusters forming the ligated superalkalis,which is regardless of their shell *** charge transfer complex formed during the ligation process,which regulates the electronic spectrum through the electrostatic Coulomb potential,was suggested to be responsible for such an IP *** ligation strategy highlighted here may provide promising opportunities in realizing the superatom synthesis in the liquid phase.

关键词： Superalkali Density functional theory Ligand-field strategy Aluminum-based cluster Electronic property