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Redistributing Cu species in Cu-SSZ-13 zeolite as NH3-SCR catalyst via a simple ion-exchange

Chinese Journal of Chemical Engineering 2022年第1期35卷 329-341页

作者： Ben Liu Nangui Lv Chan Wang hongwei zhang Yuanyuan Yue Jingdong Xu Xiaotao Bi Xiaojun Bao National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou UniversityFuzhou 350002China Qingyuan Innovation Laboratory Quanzhou 362801China Sinochem Quanzhou Energy Technology Co LtdQuanzhou 362000China Department of Chemical&Biological Engineering University of British Columbia2360 East MallVancouverBC V6T 1Z3Canada State Key Laboratory of Photocatalysis on Energy&Environment College of ChemistryFuzhou UniversityFuzhou 350116China

The nature and distribution of Cu species in Cu-SSZ-13 play a vital role in selective catalytic reduction of NO by NH3(NH3-SCR),but existing methods for adjusting the Cu distribution are complex and difficult to ***,we report a simple and effective ion-exchange approach to regulate the Cu distribution in the one-pot synthesized Cu-SSZ-13 that possesses sufficient initial Cu species and thus provides a“natural environment”for adjusting Cu distribution *** using this proposed strategy,a series of Cu-SSZ-13x zeolites with different Cu contents and distributions were *** is shown that the dealumination of the as-synthesized Cu-SSZ-13 during the ion-exchange generates abundant vacant sites in the double six-membered-rings of the SSZ-13 zeolite for relocating Cu2+species and thus allows the redistribution of the Cu *** catalytic results showed that the ion-exchanged Cu-SSZ-13 zeolites exhibit quite different catalytic performance in NH3-SCR reaction but superior to the parent *** structure–activity relationship analysis indicates that the redistribution of Cu species rather than other factors(e.g.,crystallinity,chemical composition,and porous structure)is responsible for the improved NH3-SCR performance and SO_(2) and H_(2)O *** work offers an effective method to precisely adjust the Cu distribution in preparing the industrial SCR catalysts.

关键词： Catalyst Zeolite Cu-SSZ-13 Ion-exchange Redistribution of Cu species Selective catalytic reduction(SCR)

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Atomic scale structure dominated FCC and B2 responses to He ion irradiation in eutectic high-entropy alloy AlCoCrFeNi_(2.1)

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Journal of Materials Science & Technology 2022年第34期129卷 87-95页

作者： Jingyu Pang Ting Xiong Wenfan Yang Hualong Ge Xiaodong Zheng Miao Song hongwei zhang Shijian Zheng Institute of Metal Research Chinese Academy of Sciences7Shenyang 110016China School of Material Science and Engineering University of Science and Technology of ChinaShenyang 110016China Ji Hua Laboratory Foshan 528251China School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300130China

Radiation-tolerant materials are widely desired in nuclear reactors. High-entropy alloys(HEAs) exhibiting superior mechanical performance and swelling tolerance are being considered as next-generation nuclear structural materials. However, an understanding of HEAs irradiation tolerance at an atomic scale is still lacking. In this study, the atomic scale irradiation response of AlCoCrFeNi_(2.1), composed of face-centered cubic(FCC) phase and B2 phase, has been systematically investigated at 298 and 723 K. The bubble volume ratio of the B2 phase is much larger than that of the FCC phase under the same irradiation conditions, and hence, the FCC phase has superior swelling tolerance than the B2 phase. Also, order-disorder transformation occurred in both L12and B2 phases. The different irradiation responses between the FCC and B2 phases, depend firstly on composition and secondly on crystal structure. The higher compositional complexity and complicated atomic-level lattice environment of the FCC phase contribute to better radiation performance than B2 phase. The results pave a way for exploring radiation-tolerant structural high-entropy alloys.

关键词： High-entropy alloy AlCoCrFeNi_(2.1) He ion irradiation Radiation tolerance Electron microscopy

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Size-dependent gene delivery of amine-modified silica nanoparticles

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Nano Research 2016年第2期9卷 291-305页

作者： Meihua Yu Yuting Niu Jun zhang hongwei zhang Yannan Yang Elena Taran Siddharth Jambhrunkar Wenyi Gu Peter Thorn Chengzhong Yu Australian Institute for Bioengineering and Nanotechnology The University of Queensland Brisbane QLD 4072 Australia Australian National Fabrication Facility-QLD Node Brisbane QLD 4072 Australia School of Biomedical Sciences The University of Queensland Brisbane QLD 4072 Australia

Silica-based nanoparticles are promising carriers for gene delivery applications. To gain insights into the effect of particle size on gene transfection efficiency, amine-modified monodisperse St6ber spheres （NH2-SS） with diameters of 125, 230, 330, 440, and 570 nm were synthesized. The in vitro transfection efficiencies of NH2-SS for delivering plasmid DNA encoding green fluorescent protein （GFP）（pcDNA3-EGFP, abbreviated as pcDNA, 6.1 kbp） were studied in HEK293T cells. NH2-SS with a diameter of 330 nm （NH2-SS330） showed the highest GFP transfection level compared to NH2-SS particles with other sizes. The transfection efficiency was found as a compromise between the binding capacity and cellular uptake performance of NH2-SS330 and pcDNA conjugates. NH2-SS330 also demonstrated the highest transfection efficiency for plasmid DNA （pDNA） with a bigger size of 8.9 kbp. To our knowledge, this study is the first to demonstrate the significance of particle size for gene transfection efficiency in silica-based gene delivery systems. Our findings are crucial to the rational design of synthetic vectors for gene therapy.

关键词： silica nanoparticles gene delivery plasmid DNA particle sizes cellular uptake

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Tuning the properties of Ni-based catalyst via La incorporation for efficient hydrogenation of petroleum resin

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Chinese Journal of Chemical Engineering 2022年第5期35卷 41-50页

作者： Qunhong Liu Jiangtao Yang hongwei zhang Hongming Sun Shuzheng Wu Bingqing Ge Rong Wang Pei Yuan Research Center of Chemical Fertilizer Catalyst Fuzhou UniversityFuzhou 350002China College of Chemical Engineering Fuzhou UniversityFuzhou 350116China

The hydrogenation of petroleum resin(PR)is an effective process to prepare high value-added hydrogenated PR(HPR).However,the preparation of non-noble metal-based catalysts with high catalytic activity for PR hydrogenation still remains a ***,a La promoted Ni-based catalyst is reported through the thermal reduction of quaternary Ni La Mg Al-layered double hydroxides(Ni La Mg Al-LDHs).The incorporation of La is beneficial to the reduction and stability of Ni particles with reduced particle size,and the increased alkalinity effectively mitigates the breakage of molecular chains of *** a result,the La promoted Ni-based catalyst exhibits high catalytic activity and excellent stability for PR hydrogenation.A hydrogenation degree of 95.4%and 96.1%can be achieved for HC_(5)PR and HC_(9) PR with less reduced softening point,***,the hydrogenation degree still maintains at 92.7%even after 100 hours’reaction,much better than that without La incorporation or prepared using conventional impregnation method.

关键词： Ni-based catalyst Layered double hydroxides Promotion effect Petroleum resin Hydrogenation

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Meta‐analysis and candidate gene mining of low‐phosphorus tolerance in maize

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Journal of Integrative Plant Biology 2014年第3期56卷 262-270页

作者： hongwei zhang Mohammed Shalim Uddin Cheng Zou Chuanxiao Xie Yunbi Xu Wen‐Xue Li Institute of Crop Science National Key Facility of Crop Gene Resources and Genetic Improvement the Chinese Academy of Agricultural Sciences Bangladesh Agricultural Research Institute (BARI) International Maize and Wheat Improvement Center (CIMMYT)

Plants with tolerance to low-phosphorus （P） can grow better under Iow-P conditions, and understanding of genetic mechanisms of Iow-P tolerance can not only facilitate identifying relevant genes but also help to develop Iow-P tolerant cultivars. QTL meta-analysis was conducted after a comprehensive review of the reports on O, TL mapping for Iow-P tolerance-related traits in maize. Meta-analysis pro- duced 23 consensus QTL （cQTL）, 17 of which located in similar chromosome regions to those previously reported to influence root traits. Meanwhile, candidate gene mining yielded 215 genes, 22 of which located in the cQTL regions. These 22 genes are homologous to 14 functionally characterized genes that were found to participate in plant Iow-P tolerance, including genes encoding miR399s, Pi transporters and purple acid phosphatases. Four cQTL loci （cQTL2-L cQTLS-3, cQTL6-2, and cQTL10-2） may play important roles for low-P tolerance because each contains more original QTL and has better consistency across previous reports.

关键词： Candidate gene consensus QTL low-phosphorustolerance maize meta-analysis

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General Energy Decay of Solutions for a Wave Equation with Nonlocal Damping and Nonlinear Boundary Damping

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Journal of Partial Differential Equations 2019年第4期32卷 369-380页

作者： LI Donghao zhang hongwei HU Qingying Department of Mathematics Henan University of TechnologyZhengzhou 450001China

In this paper,we consider a nonlinear wave equation with nonlocal damping and nonlinear boundary *** prove a general energy decay property for solutions in terms of coefficient of the frictional boundary damping by using of the multiplier technique from the idea of Martinez[1],Our result extends and improves the result in the literature such as the work by Louredo,Ferreira de Araujo and Mi-randain[2]in which only exponential energy decay is ***,we get also the energy decay for the equation with nonlocal damping only but without nonlinear boundary damping.

关键词： Wave equation general decay nonlocal damping boundary damping.

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Translation of a spinal bone cement product from bench to bedside

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Bioactive Materials 2022年第4期7卷 345-354页

作者： Fei Feng Mengmeng Chen Xuan Wang hongwei zhang Hongtao Nie Hai Tang Department of Orthopedics Beijing Friendship HospitalCapital Medical UniversityNo.95Yong An RdXi Cheng DistrictBeijing100050China Beijing Bonsci Technology Co Ltd No.1006th Kechuang StreetBeijing Economic and Technological Development AreaBeijing100176China

Spinal acrylic bone cements(ABCs)are used clinically for percutaneous vertebroplasty(PVP)and kyphoplasty(PKP)to treat osteoporotic vertebral compression *** translation of spinal ABC products followed the design control processes including design verification and *** bench to bedside translation of the first Chinese spinal ABC product(Alliment®,namely Alliment Cement)approved by National Medical Products Administration of China was investigated and another commercial product served as the control(Osteopal®V,namely Osteopal V Cement).Results of non-clinical bench performance verification tests of compression,bending and monomer release showed that the newly marketed Alliment Cement is similar to the Osteopal V Cement with properties of both meeting the criteria specified by *** Alliment Cement demonstrated good biocompatibility during the 26 weeks’bone implantation *** cadaver validation tests further revealed that the Alliment Cement satisfied the needs for both PVP and PKP procedures.A post-approval,retrospective clinical investigation further demonstrated the safety and efficacy of the Alliment Cement,with a significant reduction of pain and the improved stability of the fractured vertebral bodies.A successful translation of biomaterial medical products needs close collaborations among academia,industry,healthcare professionals and regulatory agencies.

关键词： Bone cement Spine Translational research Vertebroplasty Kyphoplasty Safety and efficacy

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Exponential Decay of Energy for a Logarithmic Wave Equation

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Journal of Partial Differential Equations 2015年第3期28卷 269-277页

作者： zhang hongwei LIU Gongwei HU Qingying Department of Mathematics Henan University of TechnologyZhengzhou 450001 China.

In this paper we consider the initial boundary value problem for a class of logarithmic wave equation. By constructing an appropriate Lyapunov function, we obtain the decay estimates of energy for the logarithmic wave... 详细信息

关键词： Logarithmic wave equation initial boundary value problem decay estimate.

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Cloning,expression and molecular characterization of promoter elements from Bacillus pumilus

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Chinese Science Bulletin 2001年第9期46卷 754-757页

作者： Qingyu Cao Zhicai Qu Youzhong Wan hongwei zhang Daleng Shen Jiazhen Tan Fudan Univ Sch Life Sci State Key Lab Genet Engn Shanghai 200433 Peoples R China

Promoter elements from random chromosomal DNA of a rice epiphytic Bacillus pumilus were cloned into promoter probe shuttle vector ECE7 and sequenced. The results showed that these elements were all new DNA sequences. Six strong promoter elements were obtained by determination of CAT enzyme activity in both E. coli and B. pumilus. Transcription start sites of the cat mRNA were located by primer extension using total RNA. Comparison of the promoter sequences indicated that three of them contain -10 and -35 regions like B. pumilus σ43 consensus sequence and another one is similar to B. pumilus σ29. The other two have no typical consensus sequences of known sigma factors so far.

关键词： rice epiphyte Bacillus pumilus promoter primer extension.

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Prediction of Primary Dendrite Arm Spacing in Pulsed Laser Surface Melted Single Crystal Superalloy

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Acta Metallurgica Sinica(English Letters) 2021年第4期34卷 485-494页

作者： Shiwei Ci Jingjing Liang Jinguo Li Haiwei Wang Yizhou Zhou Xiaofeng Sun hongwei zhang Yutian Ding Xin Zhou Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Space Manufacturing Technology(CAS Key Lab) Beijing100094China Taizhou Xinma Technology Industry Develepment Co.Ltd Taizhou318000China State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metal Lanzhou University of Technology287 Langongping RoadLanzhou730000China Science and Technology On Plasma Dynamics Laboratory Air Force Engineering UniversityXi’an710000China

Primary dendritic arm spacing(PDAS)is an important microstructure feature of the nickel-base single crystal *** this paper,a numerical model predicting the PDAS evolution with additive manufacturing parameters using pulsed laser is established,which combines the theoretical PDAS models with the temperature field calculation model during pulsed laser *** on this model,processing maps that related process parameters to the evolution of PDAS are *** obtain more accurate prediction model,the parameters of different solidification conditions,G^(-0.5)V^(-0.25) and G^(-0.5)V^(-0.25),are selected to calculate *** simulation results show that the PDAS increases as the arise of P and *** processmgPDAS map can accurately predict the evolution of PDAS with pulsed laser process parameters,which is well in accordance with the experimental ***,the PDAS values calculated by the G^(-0.5)V^(-0.25) are more in line with the experimental results than those calculated by the G^(-0.5)V^(-0.25).

关键词： Additive manufacturing Nickel-base superalloy Single crystal Pulsed laser Primary dendritic arm spacing

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