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Phosphorous-doped carbon nanotube/reduced graphene oxide aerogel cathode enabled by pseudocapacitance for high energy and power zinc-ion hybrid capacitors

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Chinese Chemical Letters 2024年第2期35卷 570-576页

作者： Junjun Yao Fuzhi Li Ruyi Zhou chenchen guo Xinru Liu Yirong Zhu Hunan Key Laboratory of Green Metallurgy and New Energy Materials College of Materials and Advanced ManufacturingHunan University of TechnologyZhuzhou 412007China College of packaging and Material Engineering Hunan University of TechnologyZhuzhou 412007China

The design and development of energy storage device with high energy/power density has become a research ***-ion hybrid capacitors(ZHCs)are considered as one of the most promising ***,the application of ZHCs is hindered by their low energy density at high power density due to the unsatisfactory cathode *** this study,a novel 3D phosphorus-doped carbon nanotube/reduced graphene oxide(P-CNT/rGO)aerogel cathode is synthesized through a synergistic modification strategy of CNT insertion and P doping modification combined with 3D porous *** as-obtained P-CNT/rGO aerogel cathode manifests significantly increased surface aera,expanded interlayer spacing,and enhanced pseudocapacitance behavior,thus leading to significantly enhanced specific capacitance and superb ions transport *** as-assembled ZHC based on P-CNT/rGO cathode delivers a superior energy density of 42.2 Wh/kg at an extreme-high power density of 80 kW/kg and excellent cycle ***-depth kinetic analyses are undertaken to prove the enhanced pseudocapacitance behavior and exceptional power output capability of ***,the reaction mechanism of physical and chemical adsorption/desorption of electrolyte ions on the P-CNT/rGO cathode is revealed by systematic ex-situ *** work can provide a valuable reference for developing advanced graphene-based cathode for high energy/power density ZHCs.

关键词： Graphene aerogel Phosphorus doping Pseudocapacitance Zinc-ion hybrid capacitors Energy storage mechanism

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琥珀酰化改性对猪肝蛋白乳化特性的影响与机理研究

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食品与发酵工业 2024年第12期50卷 202-208页

作者：郭晨晨耿宏庆徐毅唐永欣尚永彪西南大学食品科学学院重庆400715 川渝共建特色食品重庆市重点实验室重庆400715

猪肝是优质的动物蛋白来源,但天然猪肝蛋白乳化性较差,为了改善其性质,提升猪肝的加工附加值,该实验制备猪肝蛋白溶液,以琥珀酸酐的添加量为变量,测定酰化度指标并考察对猪肝蛋白乳化性质、蛋白质颗粒状态、分子结构等的影响。结果表明... 详细信息

猪肝是优质的动物蛋白来源,但天然猪肝蛋白乳化性较差,为了改善其性质,提升猪肝的加工附加值,该实验制备猪肝蛋白溶液,以琥珀酸酐的添加量为变量,测定酰化度指标并考察对猪肝蛋白乳化性质、蛋白质颗粒状态、分子结构等的影响。结果表明,随着琥珀酸酐添加量的增加,猪肝蛋白的酰化度、乳化活性总体呈上升趋势,乳液Zeta电位以及乳液油滴表面蛋白质吸附量呈先升高后下降的趋势,乳液粒径、蛋白质表面疏水性呈下降趋势,蛋白质的高级结构发生了变化。猪肝蛋白溶液(质量浓度10 mg/mL)酰化处理时琥珀酸酐的最佳添加量为0.10 g/g Pro,此条件下猪肝蛋白的乳化活性由9.550 m^(2)/g提高到了64.135 m^(2)/g。琥珀酸酐通过共价结合与猪肝蛋白发生反应,引起蛋白质结构的改变,能显著改善猪肝蛋白的乳化活性。

关键词：猪肝蛋白琥珀酰化改性乳化活性分子结构机理

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Screening and characterization of proteases produced by deep-sea cold seep bacteria

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Journal of Oceanology and Limnology 2022年第2期40卷 678-689页

作者： chenchen guo Chaomin SUN Shimei WU College of Life Sciences Qingdao UniversityQingdao 266071China CAS Key Laboratory of Experimental Marine Biology Institute of OceanologyChinese Academy of SciencesQingdao 266071China

Fifty protease-producing strains were screened from sediment of deep-sea cold seep,and divided into four diff erent categories:Bacillus,Pseudoalteromonas,Vibrio,and Alteromonas according to the sequences of 16s *** abilities to produce protease,amylase,and lipase were determined,and a Bacillus strain gcc-1 displayed very strong alkaline protease activity and stability under different thermal and acidic *** purifi cation of the protease produced by strain gcc-1 was carried out by precipitation with ammonium sulfate,and sequentially chromatographed by anion exchange column and gel *** purifi ed protease showed a single band at the molecular weight of 28 kDa by *** characterization results show that the purified protease exhibited a considerable activity and stability in a wide thermal range of 10-80℃and a wide acidic range of pH 6.5-11.5,and displayed highest activity at 40℃ and pH ***,the protease still maintained high activity even at low to 10℃.Furthermore,the protease exhibited good stability in presence of diff erent surfactants,organic solvents,oxidizing agent H_(2)O_(2),and commercial ***,the protease produced by gcc-1 is a cold active and high stable enzyme,and has a promising potential in laundry detergent as an additive.

关键词： deep-sea Bacillus alkaline protease purification characterization

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An integrated portable bio-monitoring system based on tough hydrogels for comprehensive detection of physiological activities

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Nano Research 2024年第1期17卷 321-332页

作者： Congcong Yang chenchen Ji Fengjiao guo Chunjiang Jin Hongyu Mi Zhongchang Wang State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources School of Chemical Engineering and TechnologyXinjiang UniversityUrumqi 830017China International Iberian Nanotechnology Laboratory(INL) Avenide Mestre Jose VeigaBraga 4715-330Portugal

Advanced soft ion-conducting hydrogels have been developed rapidly in the integrated portable health monitoring equipment due to their higher sensitivity,sensory traits,tunable conductivity,and stretchability for physiological activities and personal healthcare ***,traditional hydrogel conductors are normally susceptible to large deformation and strong mechanical stress,which leads to inferior electro-mechanical stability for real application ***,a strong ionically conductive hydrogel(poly(vinyl alcohol)-boric acid-glycerol/sodium alginate-calcium chloride/electrolyte ions(PBG/SC/EI))was designed by engineering the covalently and ionically crosslinked networks followed by the salting-out effect to further enhance the mechanical strength and ionic conductivity of the *** to the collective effects of the energy-dissipation mechanism and salting-out effect,the designed PBG/SC/EI with excellent structural integrity and robustness exhibits exceptional mechanical properties(elongation at break for 559.1%and tensile strength of 869.4 kPa)and high ionic conductivity(1.618 S·m^(-1)).As such,the PBG/SC/EI strain sensor features high sensitivity(gauge factor=2.29),which can effectively monitor various kinds of human motions(joint motions,facial micro-expression,faint respiration,and voice recognition).Meanwhile,the hydrogel-based Zn||MnO_(2)battery delivers a high capacity of 267.2 mAh·g^(-1)and a maximal energy density of 356.8 Wh·kg^(-1)associated with good cycle performance of 71.8%capacity retention after 8000 ***,an integrated bio-monitoring system with the sensor and Zn||MnO_(2)battery can accurately identify diverse physiological activities in a real-time and non-invasive *** work presents a feasible strategy for designing high-performance conductive hydrogels for highly-reliable integrated bio-monitoring systems with excellent practicability.

关键词： Ionically conductive hydrogel strain sensor Zn-based battery integrated bio-monitoring system human motion monitoring

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Improving the value of molecular testing:current status and opportunities in colorectal cancer precision medicine

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Cancer Biology & Medicine 2024年第1期21卷 21-28页

作者： Haiyun Li Linwei guo chenchen Wang Xin Hu Ye Xu Department of Colorectal Surgery Fudan University Shanghai Cancer CenterShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China Department of Gastrointestinal Medical Oncology Fudan University Shanghai Cancer CenterShanghai 200032China Precision Cancer Medical Center Affiliated with Fudan University Shanghai Cancer Center Shanghai 201315China

Colorectal cancer(CRC)is the second leading cause of cancer-related deaths *** radical resection with adjuvant chemotherapy remains the primary treatment choice for CRC,but the 5-year postoperative survival rate is only approximately 60%,and approximately one-third of patients with CRC experience recurrence within 2 years of ***,the transformation of high-throughput sequencing has accelerated the development of precision *** example,KRAS mutations indicate resistance to anti-epidermal growth factor receptor(EGFR)-targeted therapies in ***,molecular-guided individualized therapy has brought new promise in major clinical areas and challenges,such as novel biomarkers predicting sensitivity and resistance to immunotherapy for microsatellite stable(MSS)CRC.

关键词： cancer chemotherapy colorectal

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长大纵坡沥青路面车辙发展规律与轴载换算修正系数研究

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中外公路 2024年第1期44卷 30-39页

作者：郭晨晨丁婷婷吕鑫孙建秀张吉哲姚占勇山东大学齐鲁交通学院山东济南250002 山东省交通规划设计院集团有限公司山东济南250031

现有设计规范未对长大纵坡路面做出特殊设计规定,直接套用设计规范忽略了其受力特点,不能较好地保证路面使用性能及寿命。为实现特殊路段路面结构差异化设计,该文基于实测沥青混合料动态模量、全年交通量及温度数据,利用自主开发的温度... 详细信息

现有设计规范未对长大纵坡路面做出特殊设计规定,直接套用设计规范忽略了其受力特点,不能较好地保证路面使用性能及寿命。为实现特殊路段路面结构差异化设计,该文基于实测沥青混合料动态模量、全年交通量及温度数据,利用自主开发的温度-轴载分析软件,将真实交通量转换为标准轴载。采用Abaqus软件,建立实测轴载与温度耦合作用下的车辙模型,分析长大纵坡对车辙发展规律的影响。研究表明:坡度增大导致速度降低,容易引发长大纵坡路段沥青路面车辙病害的发生。基于车辙等效原理,提出不同坡度及坡长下的轴载换算修正系数,为长大纵坡路段沥青路面的差异化设计提供理论依据。

关键词：路面结构设计轴载换算修正车辙等效长大纵坡修正系数

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Complementary multicolor electrochromic devices with excellent stability based on porous tin oxide nanosheet scaffold

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Nano Research 2024年第4期17卷 3035-3042页

作者： chenchen Bian Jinhui Wang Huanhuan Liu Yin Yan Ping Zhang Weilong Yang Sensen Jia Xiaodan guo guofa Cai Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologySchool of Materials and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China

Electrochromic devices(ECDs)have been extensively investigated as promising candidates in broad cutting-edge applications,such as smart windows,electronic labels,adaptive camouflage,***,they have suffered from either inadequate color variations or poor cycling stability for a long ***,we developed a general strategy to boost the cyclic stability and enrich the color variations of ECDs by scrupulous design of the composition and nanostructure of electrodes,in which porous tin oxide(SnO_(2))nanosheets serve as the scaffold and typical metal oxides or conducting polymers as the active electrochromic *** electrochromic composite materials,including polyaniline(PANI)@SnO_(2),V2O5@SnO_(2),and WO_(3)@SnO_(2) heterostructured nanoarrays were prepared by the facile wet-chemical *** composite electrodes exhibit remarkable electrochromic performances,e.g.,superior cycling stability(more than 2000 cycles),rich color variations(more than 5 colors for PANI@SnO_(2)),and enlarged optical *** excellent performances account for the heterogenous porous nanoarrays,which not only facilitate the intercalation/extraction of ions but also relieve the stress generated during the electrochemical *** addition,diverse prototypes of complementary multicolor ECD with excellent cycling stability(over thousands of cycles)and rich color variations(8 colors)were realized for the first *** believe that our work put forward a general strategy for developing high-quality multicolor complementary electrochromic devices.

关键词： electrochromism tin oxide metal oxide cycling stability multicolor complementary device

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Graphene reinforced nanoarchitectonics of 3D interconnected magnetic-dielectric frameworks for high-efficient and anti-corrosive microwave absorbers

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Journal of Materials Science & Technology 2024年第1期168卷 194-207页

作者： chenchen Liu Xiaofang Feng Shuning Liu guo Lin Zhongxiang Bai Lingling Wang Ke Zhu Xiulan Li Xiaobo Liu School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China Sichuan Province Engineering Technology Research Center of Novel CN Polymeric Materials Chengdu611731China School of Chemical Engineering Northwest UniversityXi’an710069China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou510275China

The combination of high efficiency and environmental stability is vital to promote the commercial appli-cations of microwave absorption(MA)materials,yet remains challenging in the absence of facile ***,we put forward a graphene-reinforced construct approach for one-pot synthesis of 3D intercon-nected magnetic-dielectric frameworks via pre-functionalization and subsequent *** in-teractions among discrete precursors are capable of manipulating the confined growth and interfacial *** enhancements in MA properties are triggered in a straightforward manner us-ing ultralow feeding fractions of graphene oxide *** minimum reflection loss is up to-60.1 dB(99.9999%wave absorption)and the effective absorption bandwidth reaches 5.9 GHz(almost covering the Ku band).Remarkably,based on the optimization by ultralow concentrations of graphene,the as-prepared nanoarchitecture simultaneously integrates strong absorption,broad bandwidth,and low matching *** embedded graphene nanosheets serve as high-speed electron transmission channels and hollow resonance cavities,facilitating multimode attenuations and impedance-matching ***-while,the graphene-reinforced framework suppresses the corrosion of magnetic components,whose cor-rosion rate reduces by an order of *** study provides a simple procedure to boost magnetic-dielectric absorbers for comprehensive MA performances and enhanced corrosion resistance.

关键词： 3D Magnetic-dielectric framework Graphene nanosheet Microwave absorption Anti-corrosion

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NIR-responsive Collagen-based Sponge Coated with Polydimethylsiloxane/Candle Soot for Oil-Water Separation

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Paper And Biomaterials 2022年第3期7卷 30-41页

作者： Min Zhang chenchen guo Yu Wang Yunlong Zhang Hui Wu Liulian Huang Yonghao Ni Cuicui Ding Lihui Chen College of Material Engineering Fujian Agriculture and Forestry UniversityFuzhouFujian Province350002China Department of Chemical Engineering and Limerick Pulp&Paper Centre University of New BrunswickFrederictonE3B 5A3Canada College of Ecological Environment and Urban Construction Fujian University of TechnologyFuzhouFujian Province350108China

To fabricate an oil-water separation material that is rich in source,eco-friendly,and responsive,in this study,we successfully developed a collagen-based sponge for application to oil-water separation based on a green and facile *** this design,widely-available collagen(COL)was used as the substrate:it was immersed in polydimethylsiloxane(PDMS)suspension with candle soot(CS)nanoparticles,followed by hot *** resultant sponge(CS/PDMS-COL)possessed good hydrophobicity with a water contact angle of 148.3°under a low PDMS concentration of 2%.The results from field emission scanning electron microscope,Fourier transform infrared spectrometer,X-ray photoelectron spectrometer,and X-ray diffractometry demonstrated the successful coating of CS and PDMS on the surface of COL *** CS/PDMS-COL can adsorb eight oils,with the adsorption capacity for trichloromethane reaching 95 g/*** benzene as the target adsorbent,the separation efficiency was maintained at no less than 95%even after recycling 20 ***/PDMS-COL was also used to separate oil-in-water ***,the sponge killed bacteria effectively due to its excellent near-infrared photothermal *** study provides new insight into the preparation of facile oil-water separation materials based on naturally occurring biomaterials effortlessly.

关键词： collagen sponge oil-water separation candle soot photothermal effect antibacterial property

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The effect of symmetry potential on the balance energy of light particles emitted from mass symmetric heavy-ion collisions with isotopes,isobars and isotones

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Science China(Physics,Mechanics & Astronomy) 2012年第12期55卷 2407-2413页

作者： WANG YongJia guo chenchen LI QingFeng ZHANG HongFei School of Science Huzhou Teachers CollegeHuzhou 513000China School of Nuclear Science and Technology Lanzhou University Lanzhou 730000China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China

Using the Ultrarelativistic Quantum Molecular Dynamics(UrQMD) model,the balance energies of free neutrons,free protons and Z=1 particles(including free protons,deuterons and tritons) from mass symmetric heavy-ion collisions with isotopes,isobars and isotones are *** influence of nuclear symmetry potential energy on the balance energy is *** is found that the balance energy of free neutrons is sensitive to the nuclear symmetry energy,while that of free protons is ***,the initial neutron/proton ratio dependence of the balance energy of free neutrons from Sn isotopes can be taken as a useful probe to constrain the stiffness of the nuclear symmetry energy.

关键词：能量平衡中子能量重离子碰撞对称势同位素等压线相对论量子分子动力学模型粒子

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