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Synergistic realization of high efficiency solar desalination and carbon dioxide reduction

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Nano Research 2023年第7期16卷 10530-10536页

作者： Xiaoying Song Pei wang yi Huang Xiaoqiang Zhu U-Fat Chio fang wang Guanyu wang Wei wang Bin Liu School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China Chongqing Institute of Green and Intelligent Technology Chinese Academy of ScienceChongqing 400714China School of Electronic Science and Engineering Nanjing UniversityNanjing 210093China

Methods of seawater desalination and carbon dioxide(CO_(2))reduction using clean and renewable energy have attracted much attention withing the reducing fresh water and growing CO_(2)***,we propose a synergistic method for solardriven desalination and CO_(2)reduction at the surface of sea using a three-dimensional titanium oxide-gold semiconductor/metal(TiO_(2)-Au NW/NPs(NW:nanowire,NP:nanoparticle))photothermal conversion membrane that can efficiently harvest a broad solar spectrum(200 to 2500 nm,94%)to undertake the conversion of light-to-heat and *** TiO_(2)-Au NW/NPs membrane demonstrated a high solar vapor conversion efficiency of~90%,CO_(2)reduction yields of 0.066μmol·cm^(-2)CH_(4)and 0.015μmol·cm^(-2)CO within 5 *** addition,the membrane efficiently evaporated seawater with different salt concentrations to produce drinking water which meet World Health Organization(WHO)and US Environmental Protection Agency(EPA)*** work provides an integrated solution for solar desalination and CO_(2)reduction at the surface of sea to reduce the harm to marine life caused by ocean acidification while producing pure water.

关键词： solar desalination CO_(2)reduction titanium oxide nanowires gold nanoparticles

The giant Bayan Obo REE-Nb-Fe deposit,China:Controversy and ore genesis

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Geoscience Frontiers 2016年第3期7卷 335-344页

作者： Hong-Rui Fan Kui-Feng Yang fang-fang Hu Shang Liu Kai-yi wang Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences

Bayan Obo ore deposit is the largest rare-earth element（REE） resource,and the second largest niobium（Nb） resource in the *** to the complicated element/mineral compositions and involving several geological events,the REE enrichment mechanism and genesis of this giant deposit still remains intense *** deposit is hosted in the massive dolomite,and nearly one hundred carbonatite dykes occur in the vicinity of the *** carbonatite dykes can be divided into three types from early to late：dolomite,co-existing dolomite-calcite and calcite type,corresponding to different evolutionary stages of carbonatite magmatism based on the REE and trace element *** latter always has higher REE *** origin of the ore-hosting dolomite at Bayan Obo has been addressed in various models,ranging from a normal sedimentary carbonate rocks to volcano-sedimentary sequence,and a large carbonatitic *** geochemical evidences show that the coarse-grained dolomite represents a Mesoproterozoic carbonatite pluton and the fine-grained dolomite resulted from the extensive REE mineralization and modification of the coarse-grained *** ore bodies,distributed along an E-W striking belt,occur as large lenses and underwent more intense fluoritization and *** first episode mineralization is characterized by disseminated mineralization in the *** second or main-episode is banded and/or massive mineralization,cut by the third episode consisting of aegirinerich *** dating methods gave different mineralization ages at Bayan Obo,resulting in long and hot *** of available data suggests that the mineralization is rather variable with two peaks at～1400 and 440 *** early mineralization peak closes in time to the intrusion of the carbonatite dykes.A significant thermal event at ca.440 Ma resulted in the formation of late-stage veins with coarse crystals of REE *** involving in the REE-Nb-Fe mineralization at

关键词： Geochemistry Geochronology Carbonatite Dolomite Bayan Obo REE-Nb-Fe deposit

Activation of medial septum cholinergic neurons restores cognitive function in temporal lobe epilepsy

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Neural Regeneration Research 2023年第11期18卷 2459-2465页

作者： Junzi Chen Yu wang Cong Chen Qingyang Zhang Shuang wang yi wang Jiajia fang ying wang Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province School of Pharmaceutical ScienceThe First Affiliated HospitalZhejiang Chinese Medical UniversityHangzhouZhejiang ProvinceChina Epilepsy Center The Second Affiliated HospitalZhejiang UniversityHangzhouZhejiang ProvinceChina Department of Neurology The Fourth Affiliated HospitalZhejiang UniversityYiwuZhejiang ProvinceChina Institute of Neuropsychiatric Diseases Qingdao UniversityQingdaoShandong ProvinceChina

Cognitive impairment is the most common complication in patients with temporal lobe epilepsy with hippocampal scle *** is no effective treatment for cognitive *** septum cholinergic neurons have been reported to be a potential target for controlling epileptic seizures in tempo ral lobe epile ***,their role in the cognitive impairment of temporal lobe epilepsy remains *** this study,we found that patients with temporal lobe epile psy with hippocampal sclerosis had a low memory quotient and severe impairment in verbal memory,but had no impairment in nonverbal *** cognitive impairment was slightly correlated with reduced medial septum volume and medial septum-hippocampus tra cts measured by diffusion tensor *** a mouse model of chronic temporal lobe epilepsy induced by kainic acid,the number of medial septum choline rgic neurons was reduced and acetylcholine release was reduced in the ***,selective apoptosis of medial septum cholinergic neurons mimicked the cognitive deficits in epileptic mice,and activation of medial septum cholinergic neurons enhanced hippocampal acetylcholine release and restored cognitive function in both kainic acid-and kindling-induced epile psy *** res ults suggest that activation of medial septum cholinergic neurons reduces cognitive deficits in temporal lobe epilepsy by increasing acetylcholine release via projections to the hippocampus.

关键词： acetylcholine cholinergic neuron cognitive deficit diffusion tensor imaging hippocampal sclerosis hippocampus medial septum microdialysis optogenetics temporal lobe epilepsy

Two-Dimensional Perovskite Single Crystals for High-Performance X-ray Imaging and Exploring MeV X-ray Detection

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Energy & Environmental Materials 2024年第1期7卷 139-146页

作者： Xieming Xu yiheng Wu yi Zhang Xiaohui Li fang wang Xiaoming Jiang Shaofan Wu Shuaihua wang Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China Division of Nuclear Technology and Applications Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Scintillation semiconductors play increasingly important medical diagnosis and industrial inspection ***,two-dimensional(2D)perovskites have been shown to be promising materials for medical X-ray imaging,but they are mostly used in low-energy(≤130 keV)*** detection of MeV X-rays,which ensure thorough penetration of the thick shell walls of containers,trucks,and aircraft,is also highly desired in practical industrial ***,scintillation semiconductors for high-energy X-ray detection are currently ***,This paper reports a 2D(C_(4)H_(9)NH_(3))_(2)PbBr_(4)single crystal with outstanding sensitivity and stability toward X-ray radiation that provides an ultra-wide detectable X-ray range of between 8.20 nGy_(air)s^(-1)(50 keV)and 15.24 mGy_(air)s^(-1)(9 MeV).The(C_(4)H_(9)NH_(3))_(2)PbBr_(4)single-crystal detector with a vertical structure is used for high-performance X-ray imaging,delivering a good spatial resolution of 4.3 Ip mm^(-1)in a plane-scan imaging *** ionic migration in the 2D perovskite enables the vertical device to be operated with hundreds of keV to MeV X-ray radiation at high bias voltages,leading to a sensitivity of 46.90μC Gy_(air)-1 cm^(-2)(-1.16 Vμm^(-1))with 9 MeV X-ray radiation,demonstrating that 2D perovskites have enormous potential for high-energy industrial applications.

关键词： MeV X-ray detection single-crystal X-ray detectors two-dimensional perovskites X-ray imaging

Slow-Light Propagation in a Tapered Dielectric Periodic Waveguide over Broad Frequency Range

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Chinese Physics Letters 2011年第5期28卷 132-135页

作者： fang yi-Jiao CHEN Zhuo wang Zhen-Lin Department of Physics and National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093

A tapered waveguide composed of a one-dimensional periodic arrangement of dielectric materialis proposed for light *** equifrequency contours(EFC)of silicon-air multilayer photonic crystals within the first bandgap region are first studied.A zero-group-velocity at the first Brillouin zone boundary along the grating vector is *** propagation constants and eigenfrequencies of the first-order guiding modes are numerically investigated for photonic crystal waveguide structures with a finite *** frequency components of the guiding modes are found to slov and stop at different thicknesses inside such a tapered waveguide *** addition,the time-evolution of a femto-second pulse propagating in the tapered waveguide is also demonstrated.

关键词： waveguide Waveguide arrangement

An efficient memory data organization strategy for application-characteristic graph processing

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Frontiers of Computer Science 2022年第1期16卷 191-193页

作者： Peng fang fang wang Zhan SHI Dan FENG Qianxu yi Xianghao XU Yongxuan ZHANG Wuhan National Laboratory for Optoelectronics Key Laboratory of Information Storage SystemEngineering Research Center of data storage systems and TechnologyMinistry of Education of ChinaSchool of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan430074China

1 Introduction Graph processing has received significant attention for its ability to cope with large-scale and complex unstructured data in the ***,most of the graph processing applications exhibit an irregular memor... 详细信息

关键词： application processing pattern

Direct Observations of Atmospheric Transport and Stratosphere-Troposphere Exchange from High-Precision Carbon Dioxide and Carbon Monoxide Profile Measurements

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Advances in Atmospheric Sciences 2020年第6期37卷 608-616页

作者： You yi Zhaonan CAI yi LIU Shuangxi fang Yuli ZHANG Dongxu YANG Yong wang Miao LIANG Maohua wang Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Meteorological Observation Centre China Meteorological AdministrationBeijing 100081China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

The balloon-borne Aircore campaign was conducted in Inner Mongolia,China,on June 13 and 142018,which detected carbon dioxide(CO2)and carbon monoxide(CO)profiles from surface to 24 km,showing strong positive and negative correlations between 8 km and 10 km on 13 and 14 June,*** trajectories,meteorological analyses,and CO2 horizontal distributions were combined to interpret this *** results indicated that the source region experienced a stratospheric intrusion and exhibited a large horizontal CO2 gradient;namely,lower CO concentrations corresponded to higher CO2 concentrations and vice *** laminar structure with multiple origins resulted in the highly negative correlation between CO2 and CO in the upper troposphere on 14 *** contribution of stratospheric air mass to the upper troposphere and that of tropospheric air mass to the lower stratosphere were 26.7%and24.3%,respectively,based on a mass balance *** interesting phenomenon is that CO2 and CO concentrations increased substantially at approximately 8 km on 13 *** analysis based on the backward trajectory implied that the air mass possibly came from anthropogenic *** slope of CO2/CO representing the anthropogenic sources was 87.3 ppm *** addition,the CO2 profile showed that there was a large CO2 gradient of 4 ppm km-1 within the boundary layer on 13 June,and this gradient disappeared on 14 June.

关键词： troposphere meteorological intrusion

Hot compression deformation behavior of the Mg-Al-Y-Zn magnesium alloy

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Rare Metals 2008年第2期27卷 121-126页

作者： fang Xiya yi Danqing wang Bin WU Chunping ZHANG Hong School of Materials Science and Engineering Central South University Changsha 410083 China

The hot deformation behavior of a Mg-Al-Y-Zn magnesium alloy was investigated by hot compressive testing on a Gleeble-1500 thermal simulator at the temperature ranging from 523 to 673 K with the strain rate varying from 0.001 to 1 s^-1. The relationships among flow stress, strain rate, and deformation temperature were analyzed, and the deformation activation energy and stress exponent were calculated. Microstructure evolution of the alloy under different conditions was examined. The results indicated that the maximum value of the flow stress increased with the decrease of deformation temperature or the increase of strain rate. Under the present deformation conditions, dynamic recrystallization （DRX） occurred in the alloy, which was the main softening mechanism during deformation at elevated temperature. The deformation temperature and strain had significant effects on the microstructure of the alloy.

关键词： Mg-Al-Y-Zn magnesium alloy thermal deformation simulation deformation activation energy dynamic recrystallization

Microstructure and Corrosion Behavior of the As-Extruded Mg-4Zn-2Gd-0.5Ca Alloy

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Acta Metallurgica Sinica(English Letters) 2020年第3期33卷 362-374页

作者： Hao-yi Niu fang-fang Cao Kun-Kun Deng Kai-Bo Nie Jin-Wen Kang Hong-Wei wang Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China

In order to study the corrosion resistance of extruded magnesium alloys,the Mg-4Zn-2Gd-0.5Ca alloy was extruded at the speed of 0.01-0.1 mm/s with the temperature of 280-360℃in present *** extrusion results show that the volume fraction of precipitates(Vpre),VDRX(the dynamic recrystallization rate) and the average size of DRXed grain(dDRX) decrease with the decrease in extrusion speed,and the corrosion rate of the alloy also shows a downward *** the contrary,the values of Vpre,VDRX and dDRX increase with the increase in extrusion temperature,and the corrosion resistance of Mg-4Zn-2Gd-0.5Ca alloy *** the extrusion speed is 0.01 mm/s and the extrusion temperature is 280℃,the alloy has the best corrosion *** corrosion of extruded Mg-4Zn-2Gd-0.5Ca alloy occurs preferentially on the magnesium matrix around W and I phases in the DRXed *** the further corrosion,the corrosion continues to spread along the phase,and the corrosion area gradually *** corrosion plays a leading role in the corrosion ***,there are a large number of basal plane textures in the unDRXed region,which is conducive to improving the corrosion resistance of magnesium *** addition,the decrease in grain size also makes the corrosion of magnesium alloy more uniform.

关键词： Mg-4Zn-2Gd-0.5Ca alloy Extrusion EIS(electrochemical impedance spectroscopy) Weight loss Corrosion resistance