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Rapid fabrication of oxygen-deficient zirconia by flash sintering treatment

Journal of Advanced Ceramics 2024年第11期13卷 1881-1890页

作者： Xinghua Su Wenjin Li Da Chen Shuai Zhang Chengguang Lou Qiang Tian Jianguo Zhao Peng Zhao School of Materials Science and Engineering Chang’an UniversityXi’an 710061China State Key Laboratory of Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China School of Energy and Environment Southeast UniversityNanjing 210096China School of Physics and Electronic Information Luoyang Normal UniversityLuoyang 471022China

The introduction of oxygen vacancies into zirconia is an effective strategy for enhancing its light absorption ability and photocatalytic ***,the cost-efficient preparation of oxygen-deficient zirconia(ZrO_(2−x))remains challenging,which severely limits its broad *** this study,flash sintering treatment was used to fabricate ZrO_(2−x) bulk in very short time of 90 *** vacancies were introduced into ZrO2 bulk through electrochemical reduction *** as-prepared black ZrO_(2−x) exhibited excellent optical absorption capability,a small band gap(2.09 eV for direct and 1.67 eV for indirect),and a reduced conduction band energy,which is ascribed to the generation of oxygen vacancies and reduction of Zr *** as-prepared ZrO_(2−x) showed remarkable photocatalytic activity due to excellent solar light absorption and low recombination rate of electron‒hole *** sintering treatment provides a cost-efficient approach for rapidly fabricating ZrO_(2−x) bulk materials with high concentrations of oxygen vacancies,which can also be applied to other materials.

关键词： zirconia oxygen vacancy flash sintering treatment electrochemical reduction optical absorption

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Effects of the windshield inclination angle on head/brain injuries in car-to-pedestrian collisions using computational biomechanics models

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Transportation Safety and environment 2024年第2期6卷 1-12页

作者： Fang Wang Mingliang Wang Lin Hu Ke Peng Jiajie Yin Danqi Wang Liangliang Shi Zhou Zhou School of Automotive and Mechanical Engineering Changsha University of Science and TechnologyChangsha 410114HunanChina Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and TechnologyChangsha 410114HunanChina State Key Laboratory of Vehicle NVH and Safety Technology China Automotive Engineering Research Institute Co.Ltd.Chongqing 401122China Division of Neuronic Engineering KTH Ro y al Institute of TechnologyStockholm 14152Sweden

Car-to-pedestrian collision(CPC)accidents occur frequently,and pedestrians often suffer serious head/brain *** major cause is the primary impact with the ***,we use an umerical sim ulation method to study the influence of the windshield in-clination angle of a passenger car on pedestrian head/brain injury due to CPC *** range of the windshield inclination angle was set at 24°-50°,with an interval of 2°.The results show that the windshield angle significantly affects the pedestrian kine-matics and exerts different effects on the head injury when evaluating with various head injury *** the head peak linear/rotational acceleration and acceleration-based head injury criterion(HIC)/rotational injury criterion(RIC),the predictions at the secondary impact stage have no clear relationship with the windshield angle(R^(2)=0.04,0.07,0.03 and 0.26,respectively)and their distributions are *** the primary impact,the peak linear acceleration and HIC show a weak trend of first decreasing and then increasing with the increasing of the windshield angle,and the rotational acceleration and RIC tend to remain relatively *** the cum ulative strain dama ge measure(CSDM)criterion,the predictions at the primary impact are slightly lower than those at the secondary impact,and the trend of first decreasing and then increasing with the increase in the windshield angle is observed at both impact *** the windshield inclination angle is approximately 32°-40°,the head injury severity in both impact phases is generally lower than that predicted at other windshield angles.

关键词： car-to-pedestrian collision(CPC) head/brain injury head injury criterion(HIC) windshield inclination angle computa-tional biomechanics model(CPCBM)

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Modeling and Experimental Study of an Open Two-Phase Loop Driven by Osmotic Pressure and Capillary Force

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Frontiers in Heat and Mass Transfer 2025年第1期23卷 55-70页

作者： Hanli Bi Zheng Peng Chenpeng Liu Zhichao Jia Guoguang Li Yuandong Guo Hongxing Zhang Jianyin Miao National Key Laboratory of SpacecraftThermal Control Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing100094China School of Aeronautical Science and Engineering Beihang UniversityBeijing100083China School of Energy and Environment Engineering University of Science and Technology BeijingBeijing100083China

As space technology advances,thermal control systems must effectively collect and dissipate heat from distributed,multi-source *** heat pipe is a highly reliable two-phase heat transfer component,but it has several limitations when addressing multi-source heat *** by the transport and heat dissipation system of plants,large trees achieve stable and efficient liquid supply under the influence of two driving forces:capillary force during transpiration in the leaves(pull)and root pressure generated by osmotic pressure in the roots(push).The root pressure provides an effective liquid supply with a driving force exceeding 2 MPa,far greater than the driving force in conventional capillary-pumped two-phase *** has shown that osmotic heat pipes offer a powerful driving force,and combining osmotic pressure with capillary force has significant ***,this paper designs a multi-evaporator,dual-drive two-phase loop,using both osmotic pressure and capillary force to solve the multi-source heat dissipation ***,a transmembrane water flux model for the osmotic pressure-driven device was established to predict the maximum heat transfer capacity of the dual-drive two-phase ***,an experimental setup for a multi-evaporator“osmotic pressure+capillary force”dual-drive two-phase loop was constructed,capable of transferring at least 235 W of power under a reverse gravity condition of 20 *** study also analyzed the effects of reverse gravity height,heat load distribution among the three evaporators,startup sequence,and varying branch resistances on the performance of the dual-drive two-phase loop.

关键词： Multi-heat sources osmotic pressure two-phase loop dual-drive loop heat pipe

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Machine learning models coupled with ionic fragmentσ-profiles to predict ammonia solubility in ionic liquids

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Green Chemical engineering 2025年第2期6卷 223-232页

作者： Kaikai Li Yuesong Zhu Sensen Shi Yongzheng Song Haiyan Jiang Xiaochun Zhang Shaojuan Zeng Xiangping Zhang Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Mesoscience and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China College of Chemical and Engineering University of Chinese Academy of SciencesBeijing100049China College of Chemical Engineering and Environment China University of PetroleumBeijing102249China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai200237China

Emitting NH_(3)into the atmosphere leads to significant air pollution,while NH_(3)itself serves as an essential component for fertilizers and refrigerants in ***,recovering and reusing NH_(3)is highly *** liquids(ILs)have shown great potential for NH_(3)capture,where the accurate prediction of solubility is a critical point for selecting ILs and designing a separation *** work combined the Ionic Fragment Contribution(IFC)strategy with machine learning(ML)to develop four models(IFC-ML)to predict NH_(3)solubility in ILs.A dataset containing 785 solubility data points,covering 10 cations and 10 anions,was *** this dataset,the S1–S6 descriptors based on the IFC method were used as inputs for the ML models,together with temperature(T)and pressure(P).Among the models,the IFC-GBR model was recommended for predicting NH_(3)solubility in ILs due to its higher coefficient of determination(R^(2))of 0.9945 and lower mean squared error(MSE)of 0.0003 than the ***,in comparison with previous conductor-like screening model for real solvents(COSMO-RS)and extreme learning machine(ELM)methods,the IFC-GBR(gradient boosting regressor)method showed a more accurate prediction of the NH_(3)solubility in ILs over a wider range of temperatures and pressures,providing additional chemical insights into IL-NH_(3)system that cations played a more important role for NH_(3)*** results highlighted the developed IFC-GBR model offered valuable insights for helping guide the process design of absorbing NH_(3)through IL-based technology.

关键词： Ionic liquids Ionic fragments contribution NH_(3)solubility Machine learning

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Atmospheric gaseous elemental mercury in the Arctic:role of long-range transport and sea ice

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Advances in Polar science 2024年第4期35卷 449-458页

作者： QIU Yue YUE Fange JIANG Bei XIE Zhouqing Institute of Polar Environment&Anhui Key Laboratory of Polar Environment and Global Change Department of Environmental Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Suzhou Institute for Advanced Study University of Science and Technology of ChinaSuzhou 215123China

The potential sources of atmospheric mercury in the Arctic are still not well ***,we analyzed the round-year observations of atmospheric gaseous elemental mercury(GEM)concentrations in 2010 at two sites in the Arctic:Zeppelin Observatory(78.90°N,11.88°E)and Alert Observatory(82.47°N,62.50°W).The results showed clearly different characteristics at these two *** the winter of 2010,the long-range transport of anthropogenic emissions was the dominant factor for elevated GEM at Zeppelin Observatory while which had little contribution to GEM at Alert *** change in GEM at Zeppelin Observatory during January,February and October was dominated by long-range transported anthropogenic *** emission inventory combined with backward trajectoryanalysis suggested that the main sources were unintentional industrial sources,stationary combustion sources,and intentional use and product waste-associated sectors,which contributed 49%,33%,and 18%,*** source contribution function analysis was then conducted and found that Europe was the important source *** the summer of 2010,sea ice concentration was an important factor affecting GEM at Alert Observatory while which had little effect on GEM at Zeppelin *** results further indicated the role of anthropogenic sources and climate warming on the spatial variation in GEM over the Arctic.

关键词： mercury anthropogenic emissions sea ice Arctic

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Dimethylammonium cation stabilizes all-inorganic perovskite solar cells

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Journal of Semiconductors 2023年第3期44卷 4-8页

作者： Zuolin Zhang Mengjia Li Jie Sun Cong Chen Jiangzhao Chen Liming Ding State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Materials Science and EngineeringHebei University of TechnologyTianjin 300401China Key Laboratory of Optoelectronic Technology&Systems(MoE) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China Macao Institute of Materials Science and Engineering(MIMSE) Macao University of Science and TechnologyMacao 999078China

Facing the poor environmental stability of traditional methylammonium or formamidinium-based lead halide per-ovskites,scientists turn their attention to inorganic lead hal-ide perovskites(ILHPs)with narrow bandgaps,excellent thermal stability and reduced ion migration compared to their organic/inorganic counterparts[1−4].Up to now,the PCEs for ILHP solar cells exceed 21%[5].Especially,the preferred black ILHP(***3)with the smallest bandgap of~1.7 eV and single-halide composition for avoiding phase separation is crucial for high-performance single-junction solar cells and can be applied in tandem devices as the top cells[6,7].However,small Cs+(167 pm)in CsPbI3 with a tolerance factor close to 0.8 is unsuitable for the 3D PbI3-framework[8].The mis-matched size of cations will induce lattice strain and the per-ovskite spontaneously transforms to undesired non-photoact-ive yellow phase(δ-phase,like NH4CdCl3)(Fig.1(a))[9,10].There-fore,improving lattice symmetry and reducing lattice strain are the strategies for inhibiting the phase transition of ILHPs.

关键词： inorganic perovskite ammonium

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Mantle flow underneath the South China Sea revealed by seismic anisotropy

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National science Review 2023年第10期10卷 54-61页

作者： Fansheng Kong Rui Gao Stephen S.Gao Kelly H.Liu Weiwei Ding Xiongwei Niu Aiguo Ruan Pingchuan Tan Jianke Fan Shaoping Lu Zhengyi Tong Liqun Cheng Wenfei Gong Yanghui Zhao Jiabiao Li Key Laboratory of Submarine Geosciences Second Institute of OceanographyMinistry of Natural Resources Southern Marine Science and Engineering Guangdong Laboratory Geology and Geophysics Program Department of Geosciences and Geological and Petroleum Engineering Missouri University of Science and Technology School of Earth Sciences and Engineering Sun Yat-sen University Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences

It has long been established that plastic flow in the asthenosphere interacts constantly with the overlying lithosphere and plays a pivotal role in controlling the occurrence of geohazards such as earthquakes and volcanic ***,accurately characterizing the direction and lateral extents of the mantle flow field is notoriously difficult,especially in oceanic areas where deployment of ocean bottom seismometers(OBSs) is expensive and thus *** this study,by applying shear wave splitting analyses to a dataset recorded by an OBS array that we deployed between mid-2019 and mid-2020 in the South China Sea(SCS),we show that the dominant mantle flow field has a NNW-SSE orientation,which can be attributed to mantle flow extruded from the Tibetan Plateau by the ongoing Indian-Eurasian *** addition,the results suggest that E-W oriented flow fields observed in South China and the Indochina Peninsula do not extend to the central SCS.

关键词： mantle flow South China Sea Tibetan Plateau seismic anisotropy shear wave splitting

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Boosting singlet oxygen generation for salinity wastewater treatment through co-activation of oxygen and peroxymonosulfate in photoelectrochemical process

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Fundamental Research 2025年第1期5卷 165-173页

作者： Qianqian Yang Zhiyuan Feng Yanbo Zhou Hongying Zhao Guohua Zhao Shanghai Key Lab of Chemical Assessment and Sustainability Key Laboratory of Yangtze River Water EnvironmentSchool of Chemical Science and EngineeringTongji UniversityShanghai 200092China Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education East China University of Science and TechnologyShanghai 200092China

High concentrations of inorganic ions in saline wastewater pose adverse effects on hydroxyl radical(HO•)-dominated ***,we report a unique strategy for boosting singlet oxygen(^(1)O_(2))generation via coactivation of oxygen and peroxymonosulfate(PMS)by regulating the electron transfer regime in the photoelectrochemical *** Fe-N bridge in atomic Fe-modified graphitic carbon nitride(denoted SA-FeCN)favors the construction of electron-defective Fe and electron-rich N vacancies(Nvs)to accelerate directional electron *** produced intermediate(HSO_(4-)O···Fe−Nvs···O-O)as a chemical channel accelerates the directional electron transfer from PMS to further reduce O_(2)to form activated products(SO_(5)^(•−),O_(2)^(•−)),thereby transforming O_(2)into^(1)O_(2).An optimized^(1)O_(2)generation rate of 39.4μmol L^(−1)s^(−1)is obtained,which is 15.7–945.0 times higher than that in traditional advanced oxidation *** kinetics are achieved for removing various phenolic pollutants in a nonradical oxidation pathway,which is less susceptible to the coexistence of natural organic matter and inorganic *** COD removal for coal wastewater and complex industrial wastewater in real scenarios is found to reach a value of 90%-96%in 3 *** work provides a new direction for boosting the 1O2 generation rate,especially for the selective degradation of target electron-rich contaminants in saline wastewater.

关键词： Photoelectrochemical process Singlet oxygen Oxygen activation Peroxymonosulfate activation Electron transfer Saline wastewater

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Cross-layer all-interface defect passivation with pre-buried additive toward efficient all-inorganic perovskite solar cells

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Carbon Energy 2024年第9期6卷 283-291页

作者： Qiurui Wang Jingwei Zhu Yuanyuan Zhao Yijie Chang Nini Hao Zhe Xin Qiang Zhang Cong Chen Hao Huang Qunwei Tang College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdaoChina College of Materials Science and Engineering Sichuan UniversityChengduChina Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials School of ResourcesEnvironment and MaterialsGuangxi UniversityNanningChina Institute of Carbon Neutrality College of Chemical and Biological EngineeringShandong University of Science and TechnologyQingdaoChina

The buried interface in the perovskite solar cell(PSC)has been regarded as a breakthrough to boost the power conversion efficiency and ***,a comprehensive manipulation of the buried interface in terms of the transport layer,buried interlayer,and perovskite layer has been largely ***,we propose the use of a volatile heterocyclic compound called 2-thiopheneacetic acid(TPA)as a pre-buried additive in the buried interface to achieve cross-layer all-interface defect passivation through an in situ bottom-up infiltration diffusion *** not only suppresses the serious interfacial nonradiative recombination losses by precisely healing the interfacial and underlying defects but also effectively enhances the quality of perovskite film and releases the residual strain of perovskite *** to this versatility,TPA-tailored CsPbBr3 PSCs deliver a record efficiency of 11.23% with enhanced long-term *** breakthrough in manipulating the buried interface using TPA opens new avenues for further improving the performance and reliability of PSC.

关键词： buried interfaces charge recombination defect passivation inorganic perovskite solar cells strain relaxation

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The degradation of perovskite precursor

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Journal of Semiconductors 2023年第10期44卷 3-6页

作者： Mengjia Li Lixiu Zhang Cong Chen Jiangzhao Chen Liming Ding State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Materials Science and EngineeringHebei University of TechnologyTianjin 300401China Key Laboratory of Optoelectronic Technology&Systems(MoE) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China Macao Institute of Materials Science and Engineering(MIMSE) Macao University of Science and TechnologyMacao 999078China

Perovskite solar cells(PSCs)are taking a leading position in thin-film optoelectronic devices due to their excellent optical,physical and electrical properties[1-4].Nevertheless,the stability issue of metal halide perovskite precursor solution severely retards the future industrialization of PSCs[5-7].In stoichiometry,slight solution composition change will induce severe degradation of device performance.

关键词： perovskite halide film

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