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Multiple exciton generation effect in photocatalytic overall water splitting

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Science China Chemistry 2024年第2期67卷 424-425页

作者： Xiaolei guo ji-Jun zou Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China

This highlight is based on recent research published in Nature Energy by li and co-workers [1] from Northwestern Polytechnology University, reporting an exceeding 100% internal quantum efficiency(IQE) in photocatalytic overall water splitting. This breakthrough promises a bright future for efficient photocatalyst design by utilizing the multiple exciton effect(MEG).

关键词： splitting effect utilizing

Micro-nanoarchitectonic of aluminum-hydrogel propellant with static stability and dynamic rheology

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Frontiers of Chemical Science and Engineering 2024年第4期18卷 87-96页

作者： Huiyan guo Huaiyu li Hongzhi Zhang Lun Pan Chengxiang Shi Kang Xue Xiangwen Zhang ji-Jun zou Key Laboratory for Advanced Fuel and Propellant of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

The aluminum-water system is a promising propellant due to high energy and low signal characteristics,and the gel form is easier to store and *** this work,hydrogels of water and aluminum particles were prepared using the low-molecular-weight gellant *** various physical properties of gel systems,including the water loss rate,phase transition temperature,and centrifugal stability at different gellant and aluminum contents,were *** properties were assessed through shear thinning tests,thixotropy tests,strain sweep analysis,and frequency sweep *** microstructure of the gel was obtained through scanning electron microscopy *** results show that the aluminum-hydrogel network structure is composed of micron-scale aluminum and agarose nanosheets,and the unique micro-nanostructure endows the gel with excellent mechanical strength and thermal stability,which improve with increasing gellant and aluminum ***,the gel with 2% agarose and 20% aluminum had the best performance;the storage modulus reached 90647 Pa,which was within the linear viscoelastic region,and the maximum withstand pressure was 111.2 kPa,which was 118.8% greater than that of the pure ***,the gel demonstrates remarkable shear thinning behavior and can undergo gel-sol transformation upon shearing or heating to exceeding 114℃.

关键词： aluminum-water propellant gelled propellant rheological property mechanical strength

Core-rim structure,bi-solubility and a hierarchical phase relationship in hot-pressed ZrB2-SiC-MC ceramics(M=Nb,Hf,Ta,W)

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Journal of Materiomics 2021年第1期7卷 69-79页

作者： Dong-li Hu Hui Gu ji zou Qiang Zheng guo-Jun Zhang School of Materials Sciences and Engineering Materials Genome InstituteShanghai UniversityShanghai200444China State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China School of Metallurgy and Materials University of BirminghamB152TTUK CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Research Institute of Function MaterialsDonghua UniversityShanghai201620China

Core-rim structures were identified as a common feature in hot-pressed ZrB2-SiC-MC ceramics(M=Nb,Hf,Ta and W)by a combination of X-ray diffraction,scanning and transmission electron *** analyses associate them with the bi-solubility of M in ZrB2 phase,in which transition of solubility across the core/rim boundary is abrupted,signifying their creation via dissolution-reprecipitation process facilitated by transient *** cores were retained from starting powder after surface melting and the rims were grown from the liquid-phase to incorporate more solutes,leaving the residual liquid to turn into ZrC phase with higher solubility of *** propose g-point scheme in the ZrB2-MB2 diagrams to combine the bi-solubility and the core-rim structures into an intra-phase relationship created by sintering,leading further to a hierarchical phase *** temperature dependence of flexural strength in the ZrB2-SiC-MC ceramics varies with MC additions,which can be respectively strengthened by the strain energy created in the core-rim structures and metal segregation to grain boundaries.

关键词： Ultra-high-temperature ceramics Core-rim structures Bi-solubility Solution-reprecipitation process

Enhancing low-temperature NH_(3)-SCR performance of Fe-Mn/CeO_(2)catalyst by Al_(2)O_(3)modification

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Journal of Rare Earths 2022年第9期40卷 1454-1461,I0005页

作者： lulu li jiawei ji Wei Tan Wang Song Xin Wang Xiaoqian Wei Kai guo Wanyu Zhang Changjin Tang lin Dong School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093China jiangsu Key Laboratory of Vehicle Emissions Control School of EnvironmentCenter of Modern AnalysisNanjing UniversityNanjing 210093China School of Environment Nanjing Normal UniversityNanjing 210093China

In the work,supported catalysts of FeO_(x) and MnO_(x) co-supported on aluminum-modified CeO_(2)was synthesized for low-temperature NH_(3)-selective catalytic reduction(NH_(3)-SCR)of ***,the SCR activity of the obtained catalyst is markedly influenced by the adding amount of Al and the appropriate Ce/Al molar ratio is 1/*** activity tests demonstrate that Fe-Mn/Ce1 Al2 catalyst shows over 90%NO conversion at 75-250℃and exhibits better SO_(2)resistance compared to Fe-Mn/CeO_(2).Fe-Mn/Ce1 Al2 shows the expected physicochemical characters of the ideal catalyst including the larger surface and increased active reaction active sites by controlling the amount of Al ***,the better catalytic activity is well correlated with the present advantaged surface adsorption oxygen species,Mn^(4+)species,Ce^(3+)species and the enhanced reducibility of Fe-Mn/Ce1 Al2,which is superior to the Fe-Mn/CeO_(2)*** importantly,we further demonstrate that the amount and strength of surface acid sites are improved by Al-doping and more active intermediates(monodentate nitrate)is generated during NH_(3)-SCR *** work provides certain insight into the rational creation of simple and practical denitration catalyst environmental purification.

关键词： Selectivity catalytic reduction NO removal Low-temperature activity Al doping Cerium dioxide Rare earths

Advances in ultra-high temperature ceramics,composites,and coatings

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Journal of Advanced Ceramics 2022年第1期11卷 1-56页

作者： Dewei NI Yuan CHENG jiaping ZHANG ji-Xuan liU ji zou Bowen CHEN Haoyang WU Hejun li Shaoming DONG jiecai HAN Xinghong ZHANG Qiangang FU guo-Jun ZHANG State Key Laboratory of High Performance Ceramics&Superfine Microstructure Structural Ceramics and Composites Engineering Research CenterShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150001China Shaanxi Key Laboratory of Fiber Reinforced light Composite Materials Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Institute of Functional MaterialsDonghua UniversityShanghai 201620China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China University of Chinese Academy of Sciences Beijing 100049China

Ultra-high temperature ceramics(UHTCs)are generally referred to the carbides,nitrides,and borides of the transition metals,with the Group IVB compounds(Zr&Hf)and TaC as the main *** UHTCs are endowed with ultra-high melting points,excellent mechanical properties,and ablation resistance at elevated *** unique combinations of properties make them promising materials for extremely environmental structural applications in rocket and hypersonic vehicles,particularly nozzles,leading edges,and engine components,*** addition to bulk UHTCs,UHTC coatings and fiber reinforced UHTC composites are extensively developed and applied to avoid the intrinsic brittleness and poor thermal shock resistance of bulk ***,high-entropy UHTCs are developed rapidly and attract a lot of attention as an emerging direction for ultra-high temperature *** review presents the state of the art of processing approaches,microstructure design and properties of UHTCs from bulk materials to composites and coatings,as well as the future directions.

关键词： ultra-high temperature ceramics(UHTCs) coatings composites high-entropy ultra-high temperature ceramics

Clinical and laboratory features,treatment,and outcomes of macrophage activation syndrome in 80 children:a multi-center study in China

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World Journal of Pediatrics 2020年第1期16卷 89-98页

作者： li-Xia zou Yun Zhu li Sun Hui-Hui Ma Si-Rui Yang Hua-Song Zeng ji-Hong Xiao Hai-guo Yu li guo Yi-Ping Xu Mei-Ping Lu Department of Rheumatology Immunology and Allergy Children's HospitalZhejiang University School of Medicine57 Zhugan LaneHangzhou 310003China Department of Nephrology and Immunology Children's Hospital of Soochow University92 Zhongnan StreetSuzhou 215003China Department of Rheumatology Children's Hospital of Fudan University399 Wanyuan RoadShanghai 201102China Department of Rheumatology and Immunology Children's Hospital of Nanjing Medical University72 Guangzhou RoadNanjing 210008China Department of Pediatric Rheumatology and Allergy The First Hospital of Jilin University71 Xinming StreetChangchun 130021China Pediatric Allergy Immunology and Rheumatology DepartmentGuangzhou Children's HospitalGuangzhou Women and Children's Medical CenterGuangzhou Medical University318 Renminzhong RoadGuangzhou 510120China Department of Pediatric The First Affiliated Hospital of Xiamen University55 Zhenhai RoadXiamen 361003China

Background Macrophage activation syndrome(MAS)is a major cause of morbidity and mortality in pediatric *** aimed to further understand the clinical features,treatment,and outcome of MAS in *** A multi-center cohort study was performed in seven hospitals in China from 2012 to *** patients with MAS were enrolled,including 53 cases with systemic juvenile idiopathic arthritis(SjiA-MAS),10 cases of Kawasaki disease(KD-MAS),and 17 cases of connective tissue disease(CTD-MAS).The clinical and laboratory data were collected before(pre-),at onset,and during full-blown stages of *** compared the data among the SjiA-MAS,KD-MAS,and CTD-MAS *** 51.2%of patients developed MAS when the underlying disease was first *** patients with SjiA,22.6%(12/53)were found to have hypotension before the onset of *** patients were also found to have significantly increased aspartate aminotransferase(AST)and lactate dehydrogenase(LDH),as well as decreased albumin(PjiA-MAS compared to pre-MAS *** increased ferritin and ratio of ferritin/ESR were also observed in patients with SjiA compared to in KD and ***-operating characteristic analysis showed that 12,217.5μg/L of ferritin and 267.5 of ferritin/ESR ratio had sensitivity(80.0%and 90.5%)and specificity(88.2%and 86.7%),respectively,for predicting full-blown *** majority of the patients received corticosteroids(79/80),while biologic agents were used in 12.5%(10/80)of *** was the most commonly selected biologic *** overall mortality rate was 7.5%.Conclusions About half of MAS occurred when the underlying autoimmune diseases(SjiA,KD,and CTD)were

关键词： Connective tissue disease Kawasaki disease Macrophage activation syndrome Systemic juvenile idiopathic arthritis

Solid-phase impregnation promotes Ce doping in TiO_(2) for boosted denitration of CeO_(2)/TiO_(2) catalysts

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Chinese Chemical Letters 2022年第2期33卷 935-938页

作者： Wang Song jiawei ji Kai guo Xin Wang Xiaoqian Wei Yandi Cai Wei Tan lulu li jingfang Sun Changjin Tang lin Dong School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093China Key Laboratory of Vehicles Emission Control of jiangsu Province Center of Modern AnalysisNanjing UniversityNanjing 210093China School of Environment Nanjing Normal UniversityNanjing 210023China School of the Environment Nanjing UniversityNanjing 210093China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

CeO_(2)/TiO_(2)(denoted as Ce Ti) catalysts obtained by solid-phase impregnation behaved better in lowtemperature selective catalytic reduction of NO_(x)with NH_(3)(NH_(3)-SCR) than that by conventional wet *** explore the main factors for activity distinction,the texture property,CeO_(2)dispersion and structure changes of TiO_(2)were comprehensively *** was found that surface changes of TiO_(2)had a significant impact on the improved *** results of inductively coupled plasma atomic emission spectrometer (ICP-AES),diffuse reflectance UV-vis spectroscopy (UV-vis-DRS) and Raman,it was inferred that Ce ions were partially incorporated into TiO_(2)lattice,accompanied with the formation of defects and vacancies during solid-phase ***,Ce Ti catalysts from solid-phase impregnation exhibited superiority in adsorption and activation of *** result from monitoring the preparation process indicated that the evolved NO played an important role in promoting Ce doping through depriving oxygen atoms on TiO_(2)*** interaction between Ce and Ti was *** catalyst performed better in NH_(3)-SCR,especially at low temperature,which testified the solid-phase impregnation could be an effective method to modulate interface structure for designing efficient catalyst.

关键词： CeO_(2)/TiO_(2) NH_(3)-SCR Solid-phase impregnation Interfacial interaction NO induced incorporation

Graded composition and doping p-i-n Al_(x)Ga_(1−x)As/GaAs detector for unbiased voltage operation

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Nuclear Science and Techniques 2022年第7期33卷 73-82页

作者： Zhi-Fu Zhu ji-Jun zou Zhi-jia Sun He Huang Qing-Lei Xiu Zhong-Ming Zhang Yong Gan Chen-Xian guo Shao-Tang Wang Xiu-Ping Yue guo-li Kong School of Information Engineering Zhengzhou University of TechnologyZhengzhou450044China Engineering Research Center of Nuclear Technology Application(East China University of Technology) Ministry of EducationNanchang330013China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China Engineering Department LA14YWLancaster UniversityLancasterUK

p-i-n Al_(x)Ga_(1−x)As/GaAs detectors with graded compositions and graded doping were grown and *** the current-voltage and capacitance-voltage measurement results,the devices had good p-n junction diode characteristics,and the electric field strength under an unbiased voltage was 1.7×10^(5) Vcm^(-1).The full width at half maximum and charge collection efficiency of the detectors obtained from energy spectrum measurements of 5.48-MeV alpha particles were 3.04 and approximately 93%,*** this study,we created the most advanced and promising state-of-the-art unbiased detector reported to date.

关键词： Graded composition Graded doping Detector p-i-n Al_(x)Ga_(1−x)As/GaAs

Hyaluronan Promotes Tumor Lymphangiogenesis and Intralymphantic Tumor Growth in Xenografts

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Acta Biochimica et Biophysica Sinica 2005年第9期37卷 601-606页

作者： li-Xia guo Ke zou ji-Hang JW Hong XIE Laboratory of Biotherapy,Institute of Biochemistry and Cell Biology,Shanghai Institutes for Biological Sciences,Chinese Academy of Sciences,Graduate School of the Chinese Academy of Sciences,Shanghai 200031,China Laboratory of Biotherapy Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Graduate School of the Chinese Academy of SciencesShanghai 200031 China

Hyaluronan (HA),a high molecular weight glycosaminoglycan in the extracellular matrix,hasbeen implicated in the promotion of malignant phenotypes,including tumor ***,little isknown about the effect of HA on tumor-associated *** this study,mouse hepatocellularcarcinoma Hca-F cells combined with or without HA were injected subcutaneously into C3H/Hej mice,thenangiogenesis and lymphangiogenesis of implanted tumors were examined by immunostaining for platelet-endothelial cell adhesion molecule-1 and lymphatic vascular endothelial hyaluronan receptor-1 ***,we found HA promotes tumor lymphangiogenesis and the occurrence of intratumoral lymphaticvessels,but has little effect on tumor ***,HA also promotes intralymphatic tumorgrowth,although it is not sufficient to potentiate lymphatic *** results suggest that HA,which is elevated in most malignant tumor stroma,may also play a role in tumor progression by promotinglymphangiogenesis.

关键词： hyaluronan tumor lymphangiogenesis intralymphatic tumor growth