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Journal of Environmental Sciences 2020年第8期32卷 186-196页

作者： haoran du Zhaoping Zhong Bo Zhang Kun Shi Zhaoying Li Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast UniversityJiangsu 210096China

The deactivation of catalyst is a significant reason for its limited application during the catalytic fast pyrolysis(CFP)*** reduce the coke formation,binary compound impregnation(BCI)and chemical liquid deposition(CLD)were used to modify HZSM-5 *** the same time,the self-designed microwave reactor separated the pyrolysis of bamboo and catalytic upgrading of primary vapor,which made the catalytic effect more *** results indicated that CLD used TiO 2 deposition to cover external acid sites,while BCI by phosphorus-nickel could cover and partly destroy superficial acid sites through two different *** the scope of the loaded amount studied,the yield of aromatic hydrocarbons in the oil phase increased at first and then decreased,while the coke formation reduced ***(benzene,toluene and xylene),the most valuable product in bio-oil,drastically increased by 39.1%and 22.6%respectively over the CLD and BCI modified *** the catalytic performance as well as cost,CLD over HZSM-5 has more advantages in the CFP process to upgrade bio-oil.

关键词： Bamboo Modified HZSM-5 Microwave Binary compound impregnation Chemical liquid deposition

Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln:Analysis of stabilizing heavy metals

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Frontiers of Environmental Science & Engineering 2022年第7期16卷 21-33页

作者： Qian Li Zhaoping Zhong haoran du Xiang Zheng Bo Zhang Baosheng Jin Southeast University Key Laboratory of Energy Thermal Conversion and Control(Ministry of Education)Nanjing210096China

Pyrolysis is a promising technique used for treating of sewage ***,the application of pyrolysis products is limited due to the presence of heavy *** this study,sewage sludge mixed with kaolin/zeolite was pyrolyzed in a rotary kiln,aiming to improve the immobilization of heavy metals in pyrolytic *** total concentrations,speciation distributions,leaching toxicities,and potential ecological risk indices of heavy metals in pyrolysis biochar were explored to examine the effects of kaolin/zeolite and pyrolytic temperature on immobilizing heavy ***,mineral composition and surface morphology of biochar were characterized by X-ray diffraction and scanning electron microscopy to reveal the potential mechanism of immobilizing heavy *** pyrolysis temperature facilitated the stabilization of heavy metals in pyrolysis *** proportions of stable heavy metals in biochar obtained at 650℃ were 54.50%(Cu),29.73%(Zn),79.29%(Cd),68.17%(Pb)and 86.70%(Cr).Compared to sewage sludge,the potential contamination risk index of pyrolysis biochar obtained at 650℃ was reduced to 17.01,indicating a low ecological *** addition of 7%kaolin/zeolite further reduced the risk index of co-pyrolysis biochar prepared at 650℃ to 10.86/*** characterization of biochar revealed that increase in the pyrolysis temperature and incorporation of additives are conducive to the formation of stable heavy *** study demonstrates that the formation of stable mineral compounds containing heavy metals is the key to stabilizing heavy metals in pyrolysis biochar.

关键词： Co-pyrolysis Sewage sludge Heavy metals Rotary kiln Immobilization mechanism

Vesicular Li3V2(PO4)3/C hollow mesoporous microspheres as an efficient cathode material for lithium-ion batteries

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Nano Research 2019年第8期12卷 1937-1942页

作者： Hongxia Sun haoran du Mengkang Yu Kuangfu Huang Nan Yu Baoyou Geng College of Chemistry and Materials Science Anhui Key Laboratory of Functional Molecular SolidsMinistry of EducationThe Key Laboratory oj Electrochemical Clean Energy of Anhui Higher Education InstitutesAnhui Normal UniversityNO. 189 South Jiuhua RoadWuhu 241002China

Vesicular lithium vanadium phosphate/carbon hollow mesoporous microspheres were fabricated using a facile polyvinylpyrrolidone-assisted aerosol-spray-assisted method and subsequent heat-treatment. While changing the content of polyvinylpyrrolidone, we found that carbon content was adjustable on the surface of lithium vanadium phosphate. By optimizing the carbon content among the composites, the electrochemical performance can be enhanced significantly. The results of electrochemical performance tests suggested that the samples exhibited good cycle performance and high discharge capability in the voltages between 3.0-4.8 V. The observed excellent electrochemical performances could be attributed to the proper content of carbon coating and the vesicular hollow mesoporous microsphere structure, increasing the transmission rate of lithium ions and reducing the structural change during charging and discharging effectively.

关键词： U3V2(PO4)3 aerosol-spray-assisted approach polyvinylpyrrolidone vesicular hollow microsphere electrochemical properties

A Stretchable Ionic Conductive Elastomer for High-Areal-Capacity Lithium-Metal Batteries

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Energy & Environmental Materials 2022年第1期5卷 337-343页

作者： Kejia Li Zhenglu Zhu Ruirui Zhao haoran du Xiaoqun Qi Xiaobin Xu Long Qie Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai 201804China

Developing high-areal-capacity and dendrite-free lithium(Li)anodes is of significant importance for the practical applications of the Li-metal secondary ***,an effective strategy to stabilize the high-arealcapacity Li electrodeposition by modifying the Li metal with a stretchable ionic conductive elastomer(ICE)is *** ICE layer prepared via an instant photocuring process shows a promising Li^(+)-ion conductivity at room *** being used in Li-metal batteries,the thin ICE coating(~0.27μm)acts as both a stretchable constraint to minimize the Li loss and a protective layer to facilitate the uniform flux of Li *** this ICE-modifying strategy,the reversibility and cyclability of the Li anodes under high-areal-capacity condition in carbonate electrolyte are significantly improved,leading to a stable Li stripping/plating for 500 h at an ultrahigh areal capacity of 20 mAh cm^(-2)in commercial carbonate *** coupled with industry-level thick LiFePO;electrodes(20.0 mg cm^(-2)),the cells with ICE-Li anodes show significantly enhanced rate and cycling capability.

关键词： high areal capacity ionic conductive elastomer lithium anode lithium-metal battery protective layer

Gas template-assisted spray pyrolysis： A facile strategy to produce porous hollow Co3O4 with tunable porosity for high-performance lithium-ion battery anode materials

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Nano Research 2018年第3期11卷 1490-1499页

作者： haoran du Kuangfu Huang Min Li Yuanyuan Xia Yixuan Sun Mengkang Yu Baoyou Geng College of Chemistry and Materials Science Anhui Key Laboratory of Functional Molecular Solids Ministry of Education Anhui Laboratory of Molecular-Based Materials Center for Nano-Science and Technology Anhui Normal University Wuhu 241000 China

Porous hollow Co3O4 microspheres have been synthesized from a mixed cobalt nitrate and urea solution through spray pyrolysis followed by calcination at 600 ℃ in air. This porous hollow Co3O4 is assembled by nanoparticles and exhibits variable porosity depending on the amount of gas in the system. In pyrolysis process, urea continuously decomposes into gaseous components, which act as a template to control the porous structure. The amount of gas escaping from precursor droplets can directly influence the porosity of the microspheres and the size of the nanoparticles controlled by the ratio of urea to cobalt nitrate. Electrochemical measurements show that the performance of the porous hollow Co3O4 microspheres is related to the porosity and size of the nanopartides. The sample with optimal porosity delivers a high first charge capacity of 1,417.9 mAh·g^-1 at 0.2C （1C = 890 mA·g^-1）, and superior charge cycle performance of 1,012.7 mAh.g-1 after 100 cycles. In addition, the optimized material displays satisfactory rate performance of 1,012.4 mAh.g-1 at 1C after 50 cycles and 881.3 mAh·g^-1 at 2C after 300 cycles. Superior charge/discharge capacity, excellent rate performance and high yield achieved in this study is promising for the development of high-performance Co3O4 anode materials for lithium-ion batteries.

关键词： Co3O4/gas template tunable porosity spray pyrolysis anode lithium-ion batteries

An efficient recycling strategy to eliminate the residual“impurities”while heal the damaged structure of spent graphite anodes

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Green Energy & Environment 2024年第6期9卷 1027-1034页

作者： Dan Yang Ying Yang haoran du Yongsheng Ji Mingyuan Ma Yujun Pan Xiaoqun Qi Quan Sun Kaiyuan Shi Long Qie Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai201804China State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Shuangdeng Group Co. Ltd.Taizhou225500China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou510275China

The recycling of graphite from spent lithium-ion batteries(LIBs)is overlooked due to its relatively low added value and the lack of efficient recovering *** reuse the spent graphite anodes,we need to eliminate their useless components(mainly the degraded solid electrolyte interphase,SEI)and reconstruct their damaged ***,a facile and efficient strategy is proposed to recycle the spent graphite on the basis of the careful investigation of the composition of the cycled graphite anodes and the rational design of the regeneration *** regenerated graphite,which is revitalized by calcination treatment and acid leaching,delivers superb rate performance and a high specific capacity of 370 mAh g^(-1)(~99% of its theoretical capacity)after 100 cycles at 0.1 C,superior to the commercial graphite *** improved electrochemical performance could be attributed to unchoked Li^(+) transport channels and enhanced charge transfer reaction due to the effective destruction of the degraded SEI and the full recovery of the damaged structure of the spent *** work clarifies that the electrochemical performance of the regenerated graphite could be deteriorated by even a trace amount of the residual“impurity”and provides a facile method for the efficient regeneration of graphite anodes.

关键词： Graphite Anode Regeneration Solid electrolyte interphase Spent lithium-ion battery

A novel gene-activated matrix composed of PEI/plasmid-BMP2 complexes and hydroxyapatite/chitosan-microspheres promotes bone regeneration

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Nano Research 2022年第7期15卷 6348-6360页

作者： Ruyuan Ding Yajun Liu Dawei Cheng Gang Yang Wenjing Wu haoran du Xin Jin Yihan Chen Yuanyin Wang Boon Chin HENG Qing Yang Jianguang XU Key Lab.of Oral Diseases Research of Anhui Province College&Hospital of StomatologyAnhui Medical UniversityHefei 230032China Central Laboratory Peking University School and Hospital of StomatologyBeijing 100081China School of Medical and Life Sciences Sunway UniversitySelangor Darul EhsanMalaysia Department of Orthopaedics The First Affiliated Hospital of Anhui Medical UniversityAnhui Medical UniversityHefei 230032China Department of Chemistry and Laboratory of Nanomaterials for Energy Conversion(LNEC)University of Science and Technology of China(USTC)Hefei 230026China

The incorporation of pro-osteogenic growth factors into bone graft materials to enhance bone regeneration is a key research area within the field of bone tissue engineering and regenerative ***,growth factors directly incorporated in protein form are easily degraded,and have a limited active half-life,which cannot exert long-term and stable osteoinductive and oteoconductive *** combination of gene therapy and tissue engineering through gene-activated matrix(GAM)may provide a good alternative solution to overcome such *** materials can be combined together with plasmid DNA and a chemical-based transfection agent to form GAM,through which transfected cells could secrete growth factors in a sustained manner over a longer time duration;thereby enabling bone graft materials to act as a repository of therapeutic genes,while providing structural support and a scaffold matrix for new bone tissue *** this study,we prepared hydroxyapatite/chitosan-microspheres(HA/CS-MS)with microfabrication technology and emulsification method,and loaded the polyethylene imine/bone morphogenetic protein 2 plasmid(PEI/pBMP2)complexes with high transfection capacity(transfection efficiency up to 54.79%±4.95%),thus forming a novel GAM system with superior bone regeneration capacity—PEI/pBMP2-HA/*** in vitro experiments in this study demonstrated that our GAM had excellent biocompatibility(with cell viability over 95%),and that the as-fabricated microsphere material possessed a nano-network fibrous structure similar to natural extracellular matrix(ECM),together with a higher surface area that can provide more cell adhesion *** sizes of the prepared microspheres were mainly distributed in the 160–180μm range,while the maximal loading rate of PEI-pBMP2 complexes was 59.79%±1.85%.As a loaded complexes system,the GAM can release plasmids in a slow controlled manner,effectively transfecting surrounding target cells(release effect for up to 21 d

关键词： BMP2 chitosan gene therapy nanoparticle regeneration microsphere

ETV2 regulating PHD2-HIF-1αaxis controls metabolism reprogramming promotes vascularized bone regeneration

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Bioactive Materials 2024年第7期37卷 222-238页

作者： haoran du Bang Li Rui Yu Xiaoxuan Lu ChengLin Li HuiHui Zhang Fan Yang RongQuan Zhao WeiMin Bao Xuan Yin YuanYin Wang Jian Zhou Jianguang Xu College&Hospital of Stomatology Anhui Medical UniversityKey Lab.of Oral Diseases Research of Anhui ProvinceHefei230032China Salivary Gland Disease Center and Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction Beijing Laboratory of Oral Health and Beijing Stomatological HospitalCapital Medical UniversityBeijing100050China Department of VIP Dental Service School of StomatologyCapital Medical UniversityBeijing100050China Laboratory for Oral and General Health Integration and Translation Beijing Tiantan HospitalCapital Medical UniversityBeijingChina

The synchronized development of mineralized bone and blood vessels is a fundamental requirement for successful bone tissue *** energy production forms the cornerstone supporting new bone *** variant 2(ETV2)has been identified as a transcription factor that promotes energy metabolism reprogramming and facilitates the coordination between osteogenesis and *** vitro molecular experiments have demonstrated that ETV2 enhances osteogenic differentiation of dental pulp stem cells(DPSCs)by regulating the ETV2-prolyl hydroxylase 2(PHD2)-hypoxia-inducible factor-1α(HIF-1α)-vascular endothelial growth factor A(VEGFA)***,ETV2 achieves the rapid reprogramming of energy metabolism by simultaneously accelerating mitochondrial aerobic respiration and glycolysis,thus fulfilling the energy requirements essential to expedite osteogenic ***,decreasedα-ketoglutarate release from ETV2-modified DPSCs contributes to microcirculation ***,we engineered hydroxyapatite/chitosan microspheres(HA/CS MS)with biomimetic nanostructures to facilitate multiple ETV2-DPSC functions and further enhanced the osteogenic *** experiments have validated the synergistic effect of ETV2-modified DPSCs and HA/CS MS in promoting the critical-size bone defect *** summary,this study offers a novel treatment approach for vascularized bone tissue regeneration that relies on energy metabolism activation and the maintenance of a stable local hypoxia signaling state.

关键词： Vascularized bone regeneration ETV2 Hypoxia-inducible factor-1α Metabolism reprogramming Microsphere

Research on Modulation Signal Denoising Method Based on Improved Variational Mode Decomposition

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Journal of Electronic Research and Application 2024年第1期8卷 7-15页

作者： Canyu Mo Qianqiang Lin Yuanduo Niu haoran du Xi’an Electronic Engineering Research Institute Xi’an 710075China College of Electronic Science National University of Defense TechnologyChangsha 410199China

In order to further analyze the micro-motion modulation signals generated by rotating components and extract micro-motion features,a modulation signal denoising algorithm based on improved variational mode decomposition(VMD)is *** improve the time-frequency performance,this method decomposes the data into narrowband signals and analyzes the internal energy and frequency variations within the *** algorithms are used to adaptively optimize the mode number and bandwidth control parameters in the process of *** approach aims to obtain the optimal parameter combination and perform mode decomposition on the micro-motion modulation *** optimal mode number and quadratic penalty factor for VMD are *** on the optimal values of the mode number and quadratic penalty factor,the original signal is decomposed using VMD,resulting in optimal mode number intrinsic mode function(IMF)*** effective modes are then reconstructed with the denoised modes,achieving signal *** experimental data verification,the proposed algorithm demonstrates effective denoising of modulation *** simulation data validation,the algorithm achieves the highest signal-to-noise ratio(SNR)and exhibits the best performance.

关键词： Micro-motion modulation signal Variational mode decomposition Genetic algorithm Adaptive optimization

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锐钛型TiO_2对尿素热解过程的影响

化工进展 2019年第2期38卷 899-904页

作者：郭闯仲兆平杜浩然彭代军东南大学能源热转换及其过程测控教育部重点实验室江苏南京210096 大唐环境产业集团股份有限公司北京100097

通过实验的方法收集了不同温度下纯尿素和尿素/TiO_2混合物热解后的固体残留物,使用红外光谱(IR)及气相色谱质谱联机(GC-MS)方法对这些热解残留物进行成分分析;使用热重-红外联机(TG-FTIR)技术研究尿素及三聚氰酸在有无催化剂TiO_2的情... 详细信息

通过实验的方法收集了不同温度下纯尿素和尿素/TiO_2混合物热解后的固体残留物,使用红外光谱(IR)及气相色谱质谱联机(GC-MS)方法对这些热解残留物进行成分分析;使用热重-红外联机(TG-FTIR)技术研究尿素及三聚氰酸在有无催化剂TiO_2的情况下的热解特性及气体产物的生成规律;根据Coats-Renfern方法对尿素热解第一阶段的非等温热失重率曲线的数据进行动力学研究,建立动力学方程。结果表明,100～250℃的尿素热解残留物中主要为尿素和缩二脲,300～400℃的尿素热解残留物中主要为三聚氰酸等含氮杂环有机化合物;锐钛型TiO_2能促进尿素和三聚氰酸的热解反应,缩短其反应进程,HNCO与水蒸气在TiO_2表面易发生反应;尿素第一阶段热解的反应级数为2,单独热解时活化能为113.25kJ/mol,指前因子A为2.01×1011min-1,在催化剂TiO_2的作用下,活化能E为77.42kJ/mol,指前因子A为4.82×107min-1。

关键词：尿素催化动力学选择催化还原固体残留物