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Synthesis and Characterization of Titanosilicate with the Structure of Umbite

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Chemical Research in Chinese Universities 2002年第4期18卷 380-384页

作者： zhao yong-nan LI Ya-feng ZOU yong-chun MAI Zhen-hong PANG Wen-qin Institute of Physics&Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080P.R.China Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jinlin UniversityChangchun 130023P.R.China

A zeolitic titanosilicate with the composition of K_2TiSi_3O_9·H_2O, a structural analogue of natural mineral umbite K_2ZrSi_3O_9·H_2O, was hydrothermally synthesized in the SiO_2-TiO_2-K_2O-H_2O system and characterized by means of powder X-ray diffraction, SEM, IR and thermal analysis. The effects of TiO_2/SiO_2 and OH -/SiO_2 ratios on the crystallization of the umbite were discussed. The influence of the organic additives on the morphology of the crystal was also investigated and the crystals with different shapes were obtained.

关键词： Synthesis Titanosilicate Umbite

Preparation and Supercapacitive Properties of Fe_2O_3/Active Carbon nanocomposites

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Chemical Research in Chinese Universities 2012年第5期28卷 780-783页

作者： LUO Pei-wen YU Jian-guo SHI Zhi-qiang HUANG Hua LIU Lang zhao yong-nan LI Guo-dong ZOU yong-cun Institute of nanostructured Materials&Tianjin Key Laboratory of Fiber Modification and Functional Fiber School of Materials Science and EngineeringTianjin Polytechnic UniversityTianjin 300160P R.China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China

Fe2O3/active carbon（Fe2O3/AC） nanocomposites were readily fabricated by pyrolyzing Fe3＋ impregnated active carbon in a nitrogen atmosphere. The as-prepared composites were studied by X-ray powder diffraction（XRD）, X-ray photoelectron spectroscopy（XPS） and transmission electron microscopy（TEM）. The capacitive property of the composites was investigated by cyclic voltammetry（CV） and galvanostatic charge-discharge test. Physical characterizations show that the γ-Fe2O3 fine grains dispersed in the AC well, with a mean size of 21.24 nm. Electrochemical tests in 6 mol/L KOH solutions indicate that the as-prepared nanocomposites exhibited improved capacitive properties. The specific capacitance（SC） of Fe2O3/AC nanocomposites was up to 188.4 F/g that was derived from both electrochemical double-layer capacitance and pseudo-capacitance, which was 78% larger than that of pristine AC. A symmetric capacitor with Fe2O3/AC nanocomposites as electrode showed an excellent cycling stability. The SC was only reduced by a factor of 9.2% after 2000 cycles at a current density of 1 A/g.

关键词： nanocomposite Fe2O3 Active carbon Supercapacitor

Design and preparation of a sintered Nd-Y-Fe-B magnet with high magnetic properties via multi-main-phase process and subsequent grain boundary diffusion

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Journal of Rare Earths 2025年第2期43卷 304-311页

作者： Fugang Chen Suxin Lu Jie Wang yong zhao Wenqiang zhao Zhi Xu School of Materials Science and Engineering Jiangsu University of Science and Technology Baotou Tianshi Rare Earth New Materials Co. Ltd. Jiangsu Yangzi Xinfu Shipbuilding Co. Ltd.

A sintered Nd-Y-Fe-B magnet was designed and manufactured by the multi-main-phase *** distributed Y in the magnet decreases the adverse magnetic weakening effect of Y on the *** boundary diffusion process（GBDP） was conducted to further enhance the coercivity of the Nd-Y-Fe-B *** coercivity increases significantly from 884 to 1741 kA/m after GBDP with *** mechanism of the coercivity enhancement is discussed based on the microstructure *** simulation reveals that when the diffused Tb-rich shell thickness is lower than 12 nm the c-plane shell（perpendicular to the c-axis） is much more effective in enhancing the coercivity than the side plane shell（parallel to the c-axis）.But when the Tb-rich shell thickness is above12 nm the side plane shell contributes more to the coercivity *** results in this work can help to design and manufacture Nd-Fe-B magnets with low cost and high magnetic properties.

关键词： Grain boundary diffusion Micromagnetic simulation Multi-main-phase process Nd-Fe-B magnets Rare earths

Improving performance of perovskite solar cells enabled by defects passivation and carrier transport dynamics regulation via organic additive

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Chinese Chemical Letters 2025年第02期36卷 551-556页

作者： Rongjun zhao Tai Wu yong Hua Yude Wang Department of Physics Center for Optoelectronics Engineering ResearchYunnan University Yunnan Key Laboratory for Micro/nano Materials&Technology International Joint Research Center for Optoelectronic and Energy MaterialsSchool of Materials and EnergyYunnan University Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies Yunnan University

Defects at the grain boundaries(GBs) of perovskite film highly restrict both the efficiency and stability of perovskite solar cells(PSCs). Herein, organic small molecules of butanedioic acid(BA) and acetylenedicarboxylic acid(AA), containing two carbonyl(C=O) groups and different core-units, were incorporated into perovskite as additives for PSCs application. Thanks to the strong coordination interaction between C=O group and under-coordinated Pb2+, the additives can effectively passivate film defects and regulate the perovskite crystallization, yielding high-quality perovskite films with lower defect densities. More importantly, the additives can efficiently regulate the charge transport behaviors in PSCs. Benefiting from the defects passivation and the regulation of charge carrier dynamics, the BA and AA-treaded PSCs show the power conversion efficiencies of 21.52% and 20.50%, which are higher than that of the control device(19.41%). Besides, the optimal devices exhibit a remarkable enhanced long-term stability and moisture tolerance compared to the pristine devices. Furthermore, the transient absorption spectrum reveals the mechanism of enhanced photovoltaic performances, attributing to the improvement of charge transport capability at the perovskite/Spiro-OMeTAD interfaces. This work affords a promising strategy to improve the efficiency and stability of PSCs through regulating the charge-carrier dynamic process in perovskite film.

关键词： Additives Carrier dynamics Defects passivation Perovskite solar cells Stability

Upcycling of polyphenylene oxide into 2,6-dimethyl aniline via depolymerization and amination over a Pt/CeO₂ catalyst

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SCIENCE CHINA-CHEMISTRY 2025年第2期68卷 520-525页

作者： Jia, Shengchao zhao, Wenke Liu, Xiaohui Guo, yong Wang, Yanqin East China Univ Sci & Technol Res Inst Ind Catalysis Sch Chem & Mol Engn State Key Lab Green Chem Engn & Ind Catalysis Shanghai 200237 Peoples R China East China Univ Sci & Technol Sch Chem & Mol Engn Shanghai Key Lab Funct Mat Chem Shanghai 200237 Peoples R China

Upcycling of plastic waste into N-containing compound is a novel and attractive strategy for its disposal and will opens up a promising direction for the production of value-added amines. Herein, an efficient strategy for the depolymerization-amination of polyphenylene oxide (PPO) into 2,6-dimethyl aniline is developed over a simple Pt/CeO2 catalyst. The C-O linkages of PPO can be selectively broken, producing 2,6-dimethyl phenol and then hydrogenated and aminated to 2,6-dimethyl cyclohexylamine over the Pt/CeO2 catalyst. Finally, 2,6-dimethyl aniline was produced with high selectivity through the dehydrogenation of 2,6-dimethyl cyclohexylamine in the same catalyst. Toluene can be used as the hydrogen-acceptor in the dehydrogenation step and enhance the selectivity of target product. Single N-containing compound, 2,6-dimethyl aniline, is obtained and separated after HCl treatment. Meanwhile, the Pt/CeO(2 )catalyst exhibit remarkable stability and can sustainably catalyze the synthesis of 2,6-dimethyl aniline in several cycles.

关键词： PPO depolymerization-amination 2,6-dimethyl aniline Pt/CeO2

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二十元环超大孔磷酸亚磷酸锌锰的合成与结构

高等学校化学学报 2007年第12期28卷 2252-2254页

作者：杨扬赵永男余建国天津工业大学纳米结构材料研究所天津市改性与功能纤维重点实验室天津300160

A novel three-dimensional manganese zinc phosphatophosphite [H2CHBMA][Zn1.5Mn(HPO3)2\5(PO4)]\5H2O(TJPU-3Mn) with extra-large twenty-membered ring channels was isolated by 1,3-cyclohexanebis(methylamine) as the template under hydrothermal *** crystal structure refinement reveals that TJPU-3Mn crystallizes in the monoclinic space group C2/c,with cell parameters,a=3.3929(7) nm,b=1.3045(3) nm,c=0.89713(18) nm,β=104.37(3)°,V=3.8465(13) nm3,Z=*** connectivities of the ZnO4,MnO4,PO4 and HPO3 groups create a three-dimensional porous architecture with extra-large twenty-membered ring channels intersected by eight-membered *** is the first structure analogue to the famous aluminophsphate *** interestingly,the diprotonated CHBMA cations in the channel are all in cis configuration,indicating the potential for separation and recognition of CHBMA *** X-ray patterns reveal the structure of TJPU-3Mn sustains after the emission of water molecules obtained by calcining at 150 ℃ for 2 h.

关键词：水热合成磷酸亚磷酸锌锰单晶结构

Evaluation of detonation performance of explosives ICM-101,ONC,and TNAZ based on improved VHL equation of state

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Defence Technology(防务技术) 2025年第2期44卷 83-97页

作者： yong Han Qin Liu Yingliang Duan Yaqi zhao Xinping Long Institute of Chemical Materials China Academy of Engineering PhysicsYouxian DistrictMianyang621000China China Academy of Engineering Physics Youxian DistrictMianyang621000China

Detonation performance is crucial for evaluating the power of high explosives(HEs),and the equation of state(EOS)that accurately describes the high-temperature,high-pressure,and high-temperature,medium-pressure states of detonation products is key to assessing the damage efficiency of these energetic *** article examines the limitations of the VLW EOS in representing the thermodynamic states of explosive detonation gas products under high-temperature and medium-to high-pressure conditions.A new gas EOS for detonation products,called VHL(Virial-Han-Long),is *** accuracy of VHL in describing gas states under high-temperature and medium-to high-pressure conditions is verified,and its performance in evaluating explosive detonation and working capabilities is *** results demonstrate that VHL exhibits high precision in calculating detonation ***,the detonation performance of three new HEs(ICM-101,ONC,and TNAZ)was calculated and compared to traditional HEs(TATB,CL-20,and HMX).The results indicate that ONC has superior detonation performance compared to the other explosives,while ICM-101 shows a detonation velocity similar to CL-20 but with slightly lower detonation *** detonation characteristics of TNAZ are comparable to those of the standard HE *** the perspective of products,considering the comprehensive work performance(mechanical work and detonation heat),both ONC and ICM-101demonstrate relatively superior performance.

关键词： Equation of state Detonation performance Working capability Thermodynamics High explosive

Resolving the developmental mechanisms of cardiac microthrombosis of SARS-CoV-2 based on single-cell transcriptome analysis

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Science China(Life Sciences) 2025年第1期68卷 103-115页

作者： Xizi Luo nan Zhang Yuntao Liu Beibei Du Xuan Wang Tianxu zhao Bingqiang Liu Shishun zhao Jiazhang Qiu Guoqing Wang State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Basic MedicineJilin UniversityChangchun 130012China College of Mathematics Jilin UniversityChangchun 130021China Department of Cardiology China-Japan Union HospitalJilin UniversityChangchun 130033China Bioinformatic Lab School of MathematicsShandong UniversityJinan 250100China State Key Laboratory for Diagnosis andTreatmentof Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministryof EducationCollegeof Veterinary MedicineJilin UniversityChangchun 130062China

The coronavirus disease 2019(COVID-19)outbreak caused by the severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)developed into a global health *** microthrombus caused by SARS-CoV-2 infection is a common complication in patients with *** microthrombosis as a complication of SARS-CoV-2 infection is the primary cause of cardiac injury and death in patietns with severe *** this study,we performed single-cell sequencing analysis of the right ventricular free wall tissue from healthy donors,patients who died during the hypercoagulable period of characteristic coagulation abnormality(CAC),and patients who died during the fibrinolytic period of *** collected 61,187 cells enriched in 24 immune cell subsets and 13 cardiac-resident cell *** found that in the course of SARS-CoV-2 infected heart microthrombus,MYO1 Ehigh RASGEF1 Bhighmonocyte-derived macrophages promoted hyperactivation of the immune system and initiated the extrinsic coagulation pathway by activating chemokines CCL3,*** series of events is the main cause of cardiac microthrombi following SARS-CoV-2 *** a SARS-CoV-2 infected heart microthrombus,excessive immune activation is accompanied by an increase in cellular iron content,which in turn promotes oxidative stress and intensifies intercellular *** induces cells to alter their metabolic environment,resulting in increased sugar uptake via the glycosaminoglycan synthesis *** addition,high levels of reactive oxygen species generated by elevated iron levels promote increased endogenous malondialdehyde synthesis in a subpopulation of cardiac endothelial *** exacerbates endothelial cell dysfunction and exacerbates the coagulopathy process.

关键词： SARS-CoV-2 cardiac microthrombosis immune hyperactivation cell competition

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磷酸钛微孔晶体的合成与结构

天津大学学报 2007年第3期40卷 312-316页

作者：赵永男杨扬杨小勤天津工业大学材料化工学院天津市改性与功能纤维重点实验室天津300160

由于过渡金属配位环境、价态的多样性以及多种金属氧簇的形成,使过渡金属磷酸盐微孔材料得到迅速发展,特别是还原态金属的存在将提高微孔材料氧化催化性能．但是作为磷酸盐的重要成员,磷酸钛微孔晶体的发展严重滞后,采用金属钛粉为原料... 详细信息

由于过渡金属配位环境、价态的多样性以及多种金属氧簇的形成,使过渡金属磷酸盐微孔材料得到迅速发展,特别是还原态金属的存在将提高微孔材料氧化催化性能．但是作为磷酸盐的重要成员,磷酸钛微孔晶体的发展严重滞后,采用金属钛粉为原料,控制反应速度并创造还原性氛围．利用不同有机胺为结构导向剂,合成了3种新型结构的混合价磷酸钛化合物,其中化合物1为一维链状结构,化合物2和3为具有12元环孔道结构的微孔晶体．计算表明,3种化合物中均含有三价钛,化合物2和3中存在2种钛原子,分别为3价和4价,化合物1中只有一种钛原子,价态为3．5,磁性测试显示,化合物1中钛的有效磁矩为0．867．

关键词：水热合成微孔晶体磷酸钛晶体结构