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Synthesis of ordered mesoporous crystalline boron phosphate scaffold with double diamond surface structure

Science China chemistry 2024年

作者： Chao Wang Wen-Duo Lu Jiao Wang shun-ai che An-Hui Lu Lu Han School of chemical Science and Engineering Tongji University State Key Laboratory of Fine chemicals Liaoning Key Laboratory for Catalytic Conversion of Carbon ResourcesSchool of Chemical Engineering Dalian University of Technology School of chemistry and chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory of Metal Matrix Composites Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University

Ordered mesoporous materials have received great attention due to their well-defined pore structures and potential applications in catalysis, adsorption, separation, drug delivery, etc. Although various compositions of mesoporous solids have been successfully prepared, the preparation of crystalline non-metallic oxyacid salts with ordered mesoporosity remains a major challenge. Herein, we report the synthesis of a mesoporous solid acid crystalline boron phosphate（BPO4） catalyst with a bicontinuous shifted double diamond（SDD） hyperbolic surface structure. The BPO4scaffold was obtained by synergistic selfassembly in a mixed solvent of water and tetrahydrofuran using the diblock copolymer poly（ethylene oxide）-block-polystyrene as template and phosphoric acid and orthoboric acid as inorganic sources. The structure consists of two sets of diamond networks adjacent to each other with a mesostructural scale tetragonal symmetry（space group I41/amd） with unit cell parameters of a =80 nm and c = 113 nm, which affords the scaffold a specific surface area of 44 m2/g. As a solid acid catalytic material, the SDD BPO4scaffold exhibited excellent catalytic activity at room temperature with a conversion of furfural to 2-（dimethoxymethyl）furan over 70% and can be reused after recovery without serious loss of activity. In the propane oxidative dehydrogenation reaction, SDD BPO4demonstrated high olefin productivity and selectivity while maintaining high reaction rate. This study provides ideas for the preparation of ordered mesoporous crystalline catalytic materials and demonstrates their potential for practical applications.

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Handedness inversion of chiral mesoporous silica: A diffuse-reflectance circular dichroism study

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Chinese chemical Letters 2019年第1期30卷 139-142页

作者： Nan Wang Ruiyu Lin Minzhao Xue Yingying Duan shun'ai che School of chemistry and chemical Engineering State Key Laboratory of Composite Materials Shanghai Jiao Tong University School of chemical Science and Engineering Tongji University

Chiral mesoporous silica ribbons and rods with inversed handedness have been synthesized with the same enantio pure N-acylaminoacidat temperatures of 0℃and 20℃ respectively. With involving Cu^(2+)and meso-tetra(4-sulfonatophenyl)porphyrin(TPPS) as probes, ribbons and rods revealed opposite signals in diffuse-reflectance circular dichroism(DRCD) spectra, indicating the existence of inversed supramolecular chiral imprintings through helical stacking of amphiphiles. The structural evolution was systematically studied by the freeze-dried products sampled at different time after the addition of silica precursors. The H-bonding-depended molecular orientation probably controls the chiral sense upon forming chiral molecular stacking, which would be the origin of such handedness inversion

关键词： Chirality Handedness inversion Circular dichroism Mesoporous Amphiphile Self-assembly

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A new integrated model of deformation resistance and its application in prediction of rolling force of a thick plate

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Journal of Iron and Steel Research International 2024年第4期31卷 882-893页

作者： shun-hu Zhang Yan Li Li-zhi che Wen-hao Tian Shagang School of Iron and Steel Soochow UniversitySuzhou 215021JiangsuChina

The prediction accuracy of existing models of the rolling force of a thick plate is always very *** address this problem,a high-precision genetic algorithm-backpropagation network(GA-BP)model of deformation resistance was built,and its integration with the traditional fitted model was further ***,a novel rolling force model was obtained by embedding the integration model of deformation resistance in the original model of rolling *** to this research idea,the industrial data are normalized at *** this basis,the interactions among the process parameters were disclosed through the variance analysis,and then described by various virtual *** factors are set as part of input ***,the optimal structure of the GA-BP model of deformation resistance was determined and an integration model of deformation resistance was ***,a novel rolling force model is obtained by substituting the traditional fitted deformation resistance into the Sims model with the integration model of the deformation *** results proves that the introduction of virtual factors can increase the hit rate of±5%from 75.8%to 78%and can reduce the root mean square error from 4.72%to 4.48%.Besides,it is found that the mean relative error of the traditional fitted deformation resistance is 0.142,while that of the modified deformation resistance is only *** addition,the mean relative error in the original rolling force model is 0.145,while that of the present model is only 0.03.

关键词： Integration model-Deformation resistance Variance analysis Virtual factor Genetic algorithm-backpropagation network model

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Green manuring relocates microbiomes in driving the soil functionality of nitrogen cycling to obtain preferable grain yields in thirty years

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Science China(Life Sciences) 2024年第3期67卷 596-610页

作者： Guopeng Zhou Kunkun Fan Songjuan Gao Danna Chang Guilong Li Ting Liang Hai Liang shun Li Jiudong Zhang Zongxian che Weidong Cao State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095China Institute of Soil&Fertilizer and Resource&Environment Jiangxi Academy of Agricultural SciencesNanchang 330200China Institute of Soil and Fertilizer and Water-saving Agriculture Gansu Academy of Agricultural SciencesLanzhou 730070China

Fertilizers are widely used to produce more food, inevitably altering the diversity and composition of soil organisms. The role of soil biodiversity in controlling multiple ecosystem services remains unclear, especially after decades of fertilization. Here, we assess the contribution of the soil functionalities of carbon(C), nitrogen(N), and phosphorus(P) cycling to crop production and explore how soil organisms control these functionalities in a 33-year field fertilization experiment. The long-term application of green manure or cow manure produced wheat yields equivalent to those obtained with chemical N, with the former providing higher soil functions and allowing the functionality of N cycling(especially soil N mineralization and biological N fixation) to control wheat production. The keystone phylotypes within the global network rather than the overall microbial community dominated the soil multifunctionality and functionality of C,N, and P cycling across the soil profile(0–100 cm). We further confirmed that these keystone phylotypes consisted of many metabolic pathways of nutrient cycling and essential microbes involved in organic C mineralization, N_(2)O release, and biological N fixation. The chemical N, green manure, and cow manure resulted in the highest abundances of amoB, nifH, and GH48 genes and Nitrosomonadaceae,Azospirillaceae, and Sphingomonadaceae within the keystone phylotypes, and these microbes were significantly and positively correlated with N_(2)O release, N fixation, and organic C mineralization, respectively. Moreover, our results demonstrated that organic fertilization increased the effects of the network size and keystone phylotypes on the subsoil functions by facilitating the migration of soil microorganisms across the soil profiles and green manure with the highest migration rates. This study highlights the importance of the functionality of N cycling in controlling crop production and keystone phylotypes in regulating soil functions, an

关键词： soil biodiversity soil multifunctionality element cycling keystone phylotypes

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Inversion of Chiral Mesoporous Silica Ribbon and Rod

Inversion of Chiral Mesoporous Silica Ribbon and Rod

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中国化学会第六届全国结构化学学术会议

作者： Ying-Ying Duan,Rui-Yu Lin,Hui-Bin Qiu and shun-ai che~* School of chemistry and chemical Engineering,State key Laboratory of Composite Materials, Shanghai Jiao Tong University,800 Dongchuan Road,Shanghai,200240,P.R.China

Chiral mesoporous silica ribbons and rods with inversed morphological handedness have been synthesized with enantiopure N-acylamino acid(C-L-Ala or C-D-Ala) at temperatures of 0℃and 20℃, *** chiral molecular stacking of amphiphiles was systematically studied by the diffuse-reflectance circular dichroism(DRCD) spectroscopy of the as-made materials and also through

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Synthesis of Silica Hollow Spheres with Diameter Around 50 nm by Anionic Surfactant

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chemical Research in Chinese Universities 2012年第3期28卷 361-363页

作者： RAN Hua HAN Lu che shun-ai State Key Laboratory of Composite Materials Thin Film and Microfabrication Technology of Ministry of EducationSchool of Chemistry and Chemical TechnologyShanghai Jiaotong UniversityShanghai 200240P.R.China

Silica hollow spheres（SHSs） have attracted great attention because of their low toxicity, low density, large surface area, high chemical and thermal stability, and surface permeability. They can be widely applied in storage^[l], catalysis^[2], drug deli- very^[3,4], low-dielectric-constant materials^[5], low-refractive materials^[6-8], and so on. Up to now, there have been various methods to produce SHSs. Inorganic^[9] or organic particles^[10], such as polystyrene or calcium carbonate, were used as hard templates to create hollow cavities, However, the multistep synthetic process and the lack of structural robustness of the shells upon template removal process weaken their applica- tion. Soft templates, including oil-in-water emulsions^[11,12], vesicles^[13], micelle^[14,15] and gas bubbles^[16], are applied widely.

关键词： Anionic surfactant Co-Structure directing agent(CSDA) Vesicle

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Amphiphilic ABC Triblock Terpolymer Templating for Mesoporous Silica

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chemical Research in Chinese Universities 2014年第5期30卷 863-867页

作者： WANG Huan YAO Yuan HAN Lu che shun' ai State Key Laboratory of Metal Matrix Composites School of Chemistry and Chemical Engineering Shanghai Jiaotong University Shanghai 200240 P. R. China

Self-assembled triblock terpolymers have attracted intense attention in recent years because of their abundant variety of assembly mesostructure. We reported the synthesis of mesoporous silica materials with the am- phiphilic ABC triblock terpolymer polyethylene-poly（ethylene oxide）-polycaprolactone（PE-PEO-PCL） as a template and tetraethoxysilane（TEOS） as a silica source. Increasing the hydrophilic head group（PEO） led to the decrease of packing parameter g, which gave rise to the mesophase transformation from a cylindrical two-dimensional hexagonal P6mm structure to a cage-type face centered cubic closed-packing mesostructure. This new templating route provided a new insight into the template factor governed inorganic-organic self-assembly mesophases.

关键词： Amphiphilic triblock terpolymer Self-assembly Mesoporous material Silica

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我国竞技体育后备人才多元培养模式与优化路径研究

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体育科技文献通报 2024年第4期32卷 87-90,239页

作者：吴顺车冰清南京体育学院江苏南京210014

新时代,竞技体育后备人才培养模式是实现我国体育强国梦的重要方式。本文运用文献资料法、社会调查法、逻辑分析法等研究方法,对我国竞技体育后备人才培养的举国体制模式、体教融合模式、温州模式、个人—家庭模式进行研究。结果发现,... 详细信息

新时代,竞技体育后备人才培养模式是实现我国体育强国梦的重要方式。本文运用文献资料法、社会调查法、逻辑分析法等研究方法,对我国竞技体育后备人才培养的举国体制模式、体教融合模式、温州模式、个人—家庭模式进行研究。结果发现,目前我国竞技体育后备人才培养模式呈现出“一主多辅”的特点,举国体制模式仍占据我国竞技体育后备人才培养模式的主导地位,但随着新时代我国体育事业的不断发展,行政部门、社会系统、家庭力量也都参与到竞技体育后备人才培养上,丰富了我国竞技体育后备人才的培养模式。基于此,提出我国竞技体育后备人才培养模式的优化路径:盘活社会力量,推动多模式协同创新;坚持以人为本,增强各模式发展可持续性;平等与效应相结合,协调各模式主体利益关系;依法治体,健全多模式协同治理的法制程序等优化路径。

关键词：体育强国竞技体育后备人才培养模式

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Research progress and intelligent trend of accurate modeling of rolling force in metal sheet

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Journal of Iron and Steel Research International 2023年第11期30卷 2111-2121页

作者： shun-hu Zhang Yi Zhang Wei-gang Li Wen-hao Tian Yan Li Li-zhi che Shagang School of Iron and Steel Soochow UniversitySuzhou215021JiangsuChina Engineering Research Center for Metallurgical Automation and Measurement Technology of Ministry of Education Wuhan University of Science and TechnologyWuhan430081HubeiChina

The rolling force model is the basis for reasonable selection of rolling equipment and optimization of rolling process,and the establishment of an accurate mathematical model as well as doing the corresponding parameter analysis has been the focus of research in this field for many *** modeling methods of the rolling force and their research progress were introduced,the main methods of which are the theoretical analysis,the finite element simulation,the artificial neural network modeling,the hybrid modeling of theory and neural network,as well as the hybrid modeling of finite element and neural ***,the application examples of rolling force models in thickness control,strip crown control,and schedule optimization were presented,and an outlook on the new directions of future development was made,including establishing new type of hybrid models,solving the black box problem,and realizing the multi-objective optimization accounting for some special requirements.

关键词： Rolling force Parameter optimization Theoretical analysis Finite element simulation Neural network

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具有可控分散性的不同粒径氨基酸双功能化介孔二氧化硅纳米颗粒(英文)

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高等学校化学学报 2011年第3期32卷 560-570页

作者：王玉韩璐车顺爱上海交通大学化学化工学院上海200240

通过表面活性剂、共结构导向剂(CSDAs)和硅源的自组装合成了具有分散性的不同粒径氨基酸双功能化介孔二氧化硅纳米颗粒.利用表面活性剂头部与带相反电荷的CSDAs之间的静电相互作用使氨基和羧基基团均匀排列在介孔孔道表面.通过调节助溶... 详细信息

通过表面活性剂、共结构导向剂(CSDAs)和硅源的自组装合成了具有分散性的不同粒径氨基酸双功能化介孔二氧化硅纳米颗粒.利用表面活性剂头部与带相反电荷的CSDAs之间的静电相互作用使氨基和羧基基团均匀排列在介孔孔道表面.通过调节助溶剂或分散剂的加入量来控制颗粒粒径,调节合成溶液pH,改变纳米颗粒表面羧基基团和氨基基团的电荷量来控制颗粒的分散性.

关键词：氨基酸介孔纳米颗粒分散性共结构导向剂

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