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Tightened1D/3Dcarbonheterostructure infiltratingphase change materials for solar-thermoelectric energy harvesting:Faster and better

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Carbon Energy 2023年第6期5卷 104-117页

作者： Zhaodi Tang Piao Cheng panpan liu Yan Gao Xiao Chen Ge Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingPR China Institute of Advanced Materials Beijing Normal UniversityBeijingPR China Aerospace Institute of Advanced Material and Processing Technology BeijingPR China Shunde Graduate School University of Science and Technology BeijingShundePR China

Extensive use of thermal energy in daily life is ideal for reducing carbon emissions to achieve carbon neutrality;however,the effective collection of thermal energy is a major ***(TE)conversion technology based on the Seebeck effect and thermal energy storage technology based on phase change materials(PCMs)represent smart,feasible,and research-worthy approaches to overcome this ***,the integration of multiple thermal energy sources freely existing in the environment for storage and output of thermal and electrical energy simultaneously still remains a huge ***,three-dimensional(3D)nanostructured metal-organic frameworks(MOFs)are in situ nucleated and grown onto carbon nanotubes(CNTs)via coordination *** calcination,the prepared core-shell structural CNTs@MOFs are transformed into tightened 1D/3D carbon heterostructure loading Co nanoparticles for efficient solar-thermoelectric energy ***,the corresponding composite PCMs show a record-breaking solar-thermal conversion efficiency of 98.1%due to the tightened carbon heterostructure and the local surface plasmon resonance effect of Co ***,our designed all-in-one composite PCMs are also capable of creating an electrical potential of 0.5 mV based on the Seebeck effect without a TE *** promising approach can store thermal and electrical energy simultaneously,providing a new direction in the design of advanced all-in-one multifunctional PCMs for thermal energy storage and utilization.

关键词： carbon neutrality metal-organic framework phase change materials solar-thermoelectric conversion thermal energy storage

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Metabolic engineering of Streptomyces coelicolor for enhanced prodigiosins (RED) production

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Science China(Life Sciences) 2017年第9期60卷 948-957页

作者： panpan liu Hong Zhu Guosong Zheng Weihong Jiang Yinhua Lu Key Laboratory of Synthetic Biology Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China University of Chinese Academy of Sciences Beijing 100039 China jiangsu National Synergetic Innovation Center for Advanced Materials SICAM Nanjing 210009 China College of Life and Environment Sciences Shanghai Normal University Shanghai 200234 China

Bacterial prodigiosins are red-colored secondary metabolites with multiple activities,such as anticancer,antimalarial and immunosuppressive,which hold great potential for medical *** this study,dramatically enhanced prodigiosins(RED) production in Streptomyces coelicolor was achieved by combinatorial metabolic engineering,including inactivation of the repressor gene ohkA,deletion of the actinorhodin(ACT) and calcium-dependent antibiotic(CDA) biosynthetic gene clusters(BGCs) and multi-copy chromosomal integration of the RED *** results showed that ohkA deletion led to a 1-fold increase of RED production over the wild-type strain ***,the ACT and CDA BGCs were deleted successively based on the AohkA mutant(SBJ101).To achieve multi-copy RED BGC integration,artificial ΦC31 attB site(s) were inserted simultaneously at the position where the ACT and CDA BGCs were *** resulting strains SBJ102(with a single deletion of the ACT BGC and insertion of one artificial attB site) and SBJ103(with the deletion of both BGCs and insertion of two artificial attB sites) produced 1.9-and 6-fold higher RED titers than M145,***,the entire RED BGC was introduced into mutants from SBJ101 to SBJ103,generating three mutants(from SBJ104 to SBJ106) with chromosomal integration of one to three copies of the RED *** highest RED yield was from SBJ106,which produced a maximum level of 96.8 mg g^(-1) cell dry weight,showing a 12-fold increase relative to ***,the metabolic engineering strategies employed in this study are very efficient for the construction of high prodigiosin-producing strains.

关键词： Streptomyces coelicolor prodigiosins metabolic engineering multi-copy integration

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A soft and stretchable electronics using laser-induced graphene on polyimide/PDMS composite substrate

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npj Flexible Electronics 2022年第1期6卷 262-271页

作者： Hao Wang Zifen Zhao panpan liu Xiaogang Guo Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

The one-step fabricated laser-induced graphene(LIG)has the advantages of low cost,patterning of various desired geometries,and high ***,the robustness of substrates imposes certain constraints on their applications in stretchable *** this paper,the substrate composed of polydimethylsiloxane(PDMS)and polyimide(PI)particles is proposed to serve as the platform to manufacture *** to the inherent soft and stretchable attributes of the PI/PDMS composite substrate,the LIG based sensors can fit complex 3D configurations or bear a mechanical tension over 15%.Notably,the fluence of the laser is experimentally and theoretically determined as the only principle to characterize the formation of conductive LIG on PI/PDMS composite greatly facilitating the selection of the allowable laser scanning parameters to form the desired LIG-based *** demonstrations are conducted to highlight the superiority and the potential of this soft and stretchable LIG-based system in wearable electronics and soft robots.

关键词： composite graphene PDMS

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Scattered Co-anchored MoS_(2)synergistically boosting photothermal capture and storage of phase change materials

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Journal of Energy Chemistry 2024年第8期95卷 208-215,I0005页

作者： Yang Li panpan liu Yan Gao Yuhao Feng Peicheng Li Xiao Chen Institute of Advanced Materials Beijing Normal UniversityBeijing 100875China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Environment Beijing Normal UniversityBeijing 100875China

Pristine phase change materials(PCMs)suffer from inherent deficiencies of poor solar absorption and photothermal ***,we proposed a strategy of co-incorporation of zero-dimensional(OD)metal nanoparticles and two-dimensional(2D)photothermal materials in PCMs for efficient capture and conversion of solar energy into thermal *** scattered Co-anchored MoS_(2)nanoflower cluster serving as photon and phonon triggers was prepared by in-situ hydrothermal growth of ZIF67 polyhedron on 2D MoS_(2)and subsequent high-temperature *** encapsulating thermal storage unit(paraffin wax),the obtained composite PCMs integrated high-performance photothermal conversion and thermal energy storage *** from the synergistic enhancement of OD Co nanoparticles with localized surface plasmon resonance effect,carbon layer with the conjugation effect and 2D MoS_(2)with strong solar absorption,composite PCMs exhibited a high photothermal conversion efficiency of 95.19%,Additionally,the resulting composite PCMs also demonstrated long-term thermal sto rage stability and durable structu ral stability after 300 thermal *** proposed collabo rative co-incorporation strategy provides some innovative references for developing next-generation photothermal PCMs in solar energy utilization.

关键词： Phase change materials Photothermal conversion Thermal energy storage

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An antibiotic composite electrode for improving the sensitivity of electrochemically active biofilm biosensor

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Frontiers of Environmental Science & Engineering 2022年第8期16卷 97-106页

作者： Shuyi Wang Xiang Qi Yong Jiang panpan liu Wen Hao Jinbin Han Peng Liang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China School of Ecology and Environment Zhengzhou UniversityZhengzhou 450001China

Extensive research has been carried out for improved sensitivity of electroactive biofilm-based sensor(EAB-sensor),which is recognized as a useful tool in water quality *** that is employed widely to treat infection has been proved feasible in this study to regulate the EAB and to increase the EAB-biosensor’s sensitivity.A novel composite electrode was prepared using azithromycin(AZM)and graphite powder(GP),namely AZM@GP electrode,and was employed as the anode in *** dosages of AZM,i.e.,2 mg,4 mg,and 8 mg,referred to as 0.25%,0.5%and 1%AZM@GP were under *** showed that EAB-biosensor was greatly benefited from appropriate dosage of AZM(0.5%AZM@GP)with reduced start-up time period,comparatively higher voltage output,more readable electrical signal and increased inhibition rate(30%-65%higher than control sensor with GP electrode)when exposing to toxic *** may be attributed to the fact that AZM inhibited the growth of non-EAM without much influence on the physiologic or metabolism activities of EAM under proper *** investigation of the biofilm morphology and microbial community analysis suggested that the biofilm formation was optimized with reduced thickness and enriched Geobacter with 0.5%AZM@GP *** novel electrode is easily fabricated and equipped,and therefore would be a promising way to facilitate the practical application of EAB-sensors.

关键词： AZM@GP composite electrode EAB-biosensor Water quality early-warning

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Laser-induced porous graphene on Polyimide/PDMS composites andits kirigami-inspired strain sensor

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Theoretical & Applied Mechanics Letters 2021年第2期11卷 110-114页

作者： Hao Wang Zifeng Zhao panpan liu Xiaogang Guo Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

The laser-induced porous graphene(LIG)prepared in a straightforward fabrication method is presented,and its applications in stretchable strain sensors to detect the applied strain are also *** LIGformed on the polyimide/polydimethylsiloxane(PI/PDMS)composite exhibits a naturally high stretchabil-ity(over 30%),bypassing the transfer printing process compared to the one prepared by laser scribing onPI *** PI/PDMS composite with LIG shows tunable mechanical and electronic performances withdifferent PI particle concentrations in *** good cyclic stability and almost linear response of theprepared LIG’s resistance with respect to tensile strain provide its access to wearable *** im-prove the PDMS/PI composite stretchability,we designed and optimized a kirigami-inspired strain sensorwith LIG on the top surface,dramatically increasing the maximum strain value that in linear response toapplied strain from 3%to 79%.

关键词： Laser-induced porous graphene Polyimide(PI)/PDMS composite kirigami-inspired strain sensor

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Drying curve simulation and LF-NMR online monitor of water state in ursolic acid loaded chitosan nanoparticles during microwave freeze drying

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International Journal of Agricultural and Biological Engineering 2023年第4期16卷 263-268页

作者： Xing Ren Xu Duan Weiwei Cao Lujie Zhao Guangyue Ren panpan liu College of Food and Bioengineering Henan University of Science and TechnologyLuoyang 471023HenanChina

The changes in various states of water in ursolic acid(UA)loaded chitosan nanoparticles were assessed using lowfield nuclear magnetic resonance(LF-NMR)during microwave freeze drying(MFD)process,and six thin-layer models were applied to simulate the drying *** nanoparticles were dried at different microwave power densities(1 W/g,2 W/g and 4 W/g).The results showed that three water fractions with different transverse relaxation times(T_(2))were detected in fresh UA *** T_(2)relaxation time of water decreased significantly with drying time at different microwave power *** the mutual migration and transformation of water in different states during the drying process of chitosan nanoparticles ***,mathematical model analysis showed that the Page model provided the best description during the process of UA nanoparticle dried by *** Page model can better simulate the drying kinetics of chitosan nanoparticles dried by MFD,and LF-NMR technology can monitor the changes in water status of UA *** results revealed that LF-NMR can monitor the changes of water in UA nanoparticles during the drying process.

关键词： microwave drying chitosan nanoparticles water distribution

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Puerarin protects brain tissue against cerebral ischemia/reperfusion injury by inhibiting the inflammatory response

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Neural Regeneration Research 2014年第23期9卷 2074-2080页

作者： Feng Zhou Liang Wang panpan liu Weiwei Hu Xiangdong Zhu Hong Shen Yuanyuan Yao Department of Neurosurgery Second Affiliated Hospital School of Medicine Zhejiang University Medical College Ningbo University Department of Anesthesiology Second Affiliated Hospital School of Medicine Zhejiang University

Puerarin, a traditional Chinese medicine, exerts a powerful neuroprotective effect in cerebral ischemia/reperfusion injury, but its mechanism is unknown. Here, we established rat models of middle cerebral artery ischemia/reperfusion injury using the suture method. Puerarin （100 mg/kg） was administered intraperitoneally 30 minutes before middle cerebral artery occlusion and 8 hours after reperfusion. Twenty-four hours after reperfusion, we found that puerarin significantly improved neurological deficit, reduced infarct size and brain water content, and notably diminished the expression of Toll-like receptor-4, myeloid differentiation factor 88, nuclear factor kappa B and tumor necrosis factor-α in the ischemic region. These data indicate that puerarin exerts an anti-inflammatory protective effect on brain tissue with ischemia/reperfusion damage by downregulating the expression of multiple inflammatory factors.

关键词： nerve regeneration brain injury puerarin cerebral ischemia reperfusion injury rats inflammatory reaction Toll-like receptor-4 nuclear factor kappa B myeloid differentiation factor 88 tumor necrosis factor-α middle cerebral artery occlusion neural regeneration

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Integrating thermal energy storage and microwave absorption in phase change material-encapsulated core-sheath MoS_(2)@CNTs

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Journal of Energy Chemistry 2023年第9期84卷 41-49页

作者： panpan liu Yang Li Zhaodi Tang Junjun Lv Piao Cheng Xuemei Diao Yu Jiang Xiao Chen Ge Wang Institute of Advanced Materials Beijing Normal UniversityBeijing 100875China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Developing advanced nanocomposite integrating solar-driven thermal energy storage and thermal management functional microwave absorption can facilitate the cutting-edge application of phase change materials(PCMs).To conquer this goal,herein,two-dimensional MoS_(2) nanosheets are grown in situ on the surface of one-dimensional CNTs to prepare core-sheath MoS_(2)@CNTs for the encapsulation of paraffin wax(PW).Benefiting from the synergistic enhancement photothermal effect of MoS_(2) and CNTs,MoS_(2)@CNTs is capable of efficiently trapping photons and quickly transporting phonons,thus yielding a high solar-thermal energy conversion and storage efficiency of 94.97%.Meanwhile,PW/MoS_(2)@CNTs composite PCMs exhibit a high phase change enthalpy of 101.60 J/g and excellent lo ng-term thermal storage durability after undergoing multiple heating-cooling *** attractively,PW/MoS_(2)@CNTs composite PCMs realize thermal management functional microwave absorption in heat-related electronic application scenarios,which is superior to the single microwave absorption of traditional *** minimum reflection loss(RL) for PW/MoS_(2)@CNTs is-28 dB at 12.91 GHz with a 2.0 mm *** functional integration design provides some insightful references on developing advanced microwave absorbing composite PCMs,holding great potential towards high-efficiency solar energy utilization and thermally managed microwave absorption fields.

关键词： Phase change materials Core-sheath MoS_(2)@CNTs Solar-thermal energy conversion Thermal energy storage Microwave absorption

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Photoelectromagnetic multimode triggered phase change materials for thermotherapy

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SusMat 2024年第4期4卷 14-26页

作者： Yang Li Han Yu panpan liu Xuemei Diao Yuhao Feng Yu Jiang Xiao Chen School of Physics and Astronomy Beijing Normal UniversityBeijingChina

Neither pristine phase change materials(PCMs)nor metal-organic frame-works(MOFs)can be driven by optical/electrical/magnetic triggers for multiple energy conversion and thermal storage,which cannot satisfy the requirements of multi-scenario ***,a three-dimensional interconnected forest-type array carbon network anchored by Co nanoparticles serving as optical/electrical/magnetic multimode triggers was developed through in situ growth of two-dimensional MOF nanosheet arrays on pre-carbonized melamine foam and subsequent high-temperature *** the encapsulation of polyethylene glycol,the resulting composite PCMs simultaneously integrate fascinating photothermal,electrothermal,magnetothermal conversion and stor-age for personal *** from the synergistic enhancement of forest-type array carbon heterostructure and Co nanoparticles,composite PCMs exhibit high thermal/electrical conduction and strong full-spectrum absorption ***,low-energy photoelectric triggers are sufficient to drive high-efficiency photothermal/electrothermal conversion and storage of compos-ite PCMs(93.1%,100 mW/cm^(2);92.9%,2.5 V).Additionally,composite PCMs also exhibit excellent encapsulation stability without liquid phase leakage,long-term thermal reliability and multiple energy conversion and storage stability after multiple *** proposed photoelectromagnetic multimode triggers are aimed to inspire innovation and accelerate major breakthroughs in advanced responsive composite PCMs toward multiple energy utilization and personal thermotherapy.

关键词： metal-organic frameworks multiple energy conversion phase change materials photoelectro-magnetic multimode triggers thermal energy storage

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