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元宇宙的三重现实性

含氟富氮多孔有机聚合物的合成及其对水中全氟辛酸的去除

文化艺术研究 2024年第3期 55-66页

作者：张书圣上海大学文学院上海 200444

元宇宙还远未实现,不能直接描述其实在性现实(Realität),但元宇宙理念试图填充人的意义世界,为人提供一种新的生活现实,为当下前瞻性考察其在世性现实(Wirklichkeit)提供了可能.元宇宙的在世性现实可以从三个层次来理解:元宇宙奠基于人... 详细信息

元宇宙还远未实现,不能直接描述其实在性现实(Realität),但元宇宙理念试图填充人的意义世界,为人提供一种新的生活现实,为当下前瞻性考察其在世性现实(Wirklichkeit)提供了可能.元宇宙的在世性现实可以从三个层次来理解:元宇宙奠基于人类感官的解读,并创造性地满足人的需求,自然是属人的;元宇宙与人的行动密切相关,其中所蕴含的三重创造性模仿亦契合阐释学上的主体实践结构,不断丰富人的自我认识;元宇宙通过不断往复的过程,作为游戏现实充实人的日常生活,在感官确认、第三方权威、主体性统一和阻抗经验四个向度上为人提供不同于传统艺术媒介的行为约束性和参考预设性.这三个层次的考察以一种审慎的自反性,分别借助哲学人类学、诠释学、现象学和实用主义的方法追问元宇宙的现实性,或可为技术时代批判性反思人的境况提供一些线索.

关键词：元宇宙现实性小说技术布鲁门贝格利科游戏

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色谱 2024年第6期42卷 572-580页

作者：陈欣钱文平陈天奇邵凌云张文芬张书胜郑州大学化学学院河南郑州450001 郑州大学风味科学研究中心中原食品实验室河南郑州450001

全氟辛酸(PFOA)在自然环境中难以降解,会通过富集渗透污染水体和土壤,从而对自然环境和人体健康造成影响。开发成本低、效率高、环保的吸附剂实现环境水体中PFOA的高效吸附去除是解决PFOA污染的有效途径之一。本研究采用无溶剂一锅法设... 详细信息

全氟辛酸(PFOA)在自然环境中难以降解,会通过富集渗透污染水体和土壤,从而对自然环境和人体健康造成影响。开发成本低、效率高、环保的吸附剂实现环境水体中PFOA的高效吸附去除是解决PFOA污染的有效途径之一。本研究采用无溶剂一锅法设计、制备了一种含氟富氮多孔有机聚合物(POP-3F),通过引入氟原子增加了材料的疏水性,增加了主客体分子间的疏水作用、氟-氟相互作用,提升了材料对PFOA的吸附效果。使用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)、X-射线衍射仪(XRD)、固体核磁(ssNMR)、X射线光电子能谱仪(XPS)、热分析系统(TGA)等对POP-3F进行了表征。结合液相色谱-串联质谱法(LC-MS/MS),研究了POP-3F在不同pH、盐浓度和腐植酸条件下对PFOA的吸附性能。在pH值为2时,POP-3F对PFOA的去除率最高达到98.6%,可用于去除酸性工业废水中的PFOA。并且POP-3F对于PFOA的去除率几乎不受NaCl和腐植酸浓度的影响,在加入NaCl后,POP-3F表面会形成双电层,可以削弱POP-3F与PFOA之间的静电相互作用,去除率仅下降了1%。腐植酸与PFOA存在竞争吸附,在高浓度腐植酸条件下,POP-3F对PFOA的去除率仅下降了0.73%。在最佳pH条件下考察了吸附等温线和吸附动力学,通过数学模型拟合了实验结果,探究了吸附机理。结果显示,POP-3F的理论容量为191 mg/g,高于活性炭和其他多数吸附剂,表现出较高的吸附容量。此外,POP-3F对PFOA的吸附去除几乎不受基质种类的影响,在模拟自然水中吸附效果略有降低(仅降低0.1%),经过5次吸附-解吸循环后,对PFOA的去除率仅微幅下降(降低0.67%),表明其具有循环使用和可再生性,在实际PFOA污染废水处理中具有广阔的应用前景。

关键词：液相色谱-串联质谱富氮多孔有机聚合物全氟辛酸吸附

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缓粘结预应力技术在杭州西站项目中的应用分析

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四川建材 2024年第4期50卷 154-155,172页

作者：张树生胡海芳樊高冲北京兆福基新材料科技发展有限公司北京100029 中研兆科(北京)技术有限公司北京102488

以浙江省杭州市西站工程项目为例,分析了大型公共建筑工程中,缓粘结预应力筋遇到长期预留施工通道的处理方案,并从缓粘结预应力深化图纸设计和工程实施的角度出发,重点介绍了梁中预应力筋遇型钢骨后钢绞线穿设问题、预应力筋张拉端排布... 详细信息

以浙江省杭州市西站工程项目为例,分析了大型公共建筑工程中,缓粘结预应力筋遇到长期预留施工通道的处理方案,并从缓粘结预应力深化图纸设计和工程实施的角度出发,重点介绍了梁中预应力筋遇型钢骨后钢绞线穿设问题、预应力筋张拉端排布问题等深化过程中关键问题的处理原则和解决方案,为大型公共建筑工程中缓粘结预应力的深化设计和工程施工提供参考。

关键词：缓粘结预应力深化图纸设计长期预留施工通道穿型钢骨张拉端排布

Electrocatalytic reduction of NO to NH_(3) in ionic liquids by P-doped TiO_(2) nanotubes

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Frontiers of Chemical Science and Engineering 2023年第6期17卷 726-734页

作者： Shangcong zhang Qian Liu Xinyue Tang Zhiming Zhou Tieyan Fan Yingmin You Qingcheng zhang shusheng zhang Jun Luo Xijun Liu College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035China Low Voltage Apparatus Technology Research Centre of Zhejiang Wenzhou UniversityWenzhou 325035China Institute for Advanced Study Chengdu UniversityChengdu 610106China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China College of Chemistry Zhengzhou UniversityZhengzhou 450000China Tianjin Key Lab for Photoelectric Materials&Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Compesite Structures School of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China

Designing advanced and cost-effective electrocatalytic system for nitric oxide(NO)reduction reaction(NORR)is vital for sustainable NH_(3) production and NO removal,yet it is a challenging ***,it is shown that phosphorus(P)-doped titania(TiO_(2))nanotubes can be adopted as highly efficient catalyst for *** catalyst demonstrates impressive performance in ionic liquid(IL)-based electrolyte with a remarkable high Faradaic efficiency of 89%and NH3 yield rate of 425μg·h^(−1)·mg_(cat).^(−1),being close to the best-reported ***,the obtained performance metrics are significantly larger than those for N_(2) reduction *** also shows good durability with negligible activity decay even after 10 *** simulations reveal that the introduction of P dopants tunes the electronic structure of Ti active sites,thereby enhancing the NO adsorption and facilitating the desorption of ^(*)NH_(3).Moreover,the utilization of IL further suppresses the competitive hydrogen evolution *** study highlights the advantage of the catalyst−electrolyte engineering strategy for producing NH_(3) at a high efficiency and rate.

关键词： nitric oxide reduction reaction electrcatalysis ammonia production phosphorus-doped titania

MoC nanocrystals confined in N-doped carbon nanosheets toward highly selective electrocatalytic nitric oxide reduction to ammonia

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Nano Research 2022年第10期15卷 8890-8896页

作者： Ge Meng Mengmeng Jin Tianran Wei Qian Liu shusheng zhang Xianyun Peng Jun Luo Xijun Liu Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China Institute for New Energy Materials and Low-Carbon Technologies Tianjin Key Lab for Photoelectric Materials&DevicesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for NonFerrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China Institute for Advanced Study Chengdu UniversityChengdu 610106China College of Chemistry Zhengzhou UniversityZhengzhou 450000China Institute of Zhejiang University–Quzhou Quzhou 324000China

Electrochemical nitric oxide reduction reaction(NORR)to produce ammonia(NH3)under ambient conditions is a promising alternative to the energy and carbon-intensive Haber–Bosch approach,but its performance is still ***,molybdenum carbides(MoC)nanocrystals confined by nitrogen-doped carbon nanosheets are first designed as an efficient and durable electrocatalyst for catalyzing the reduction of NO to NH3 with maximal Faradaic efficiency of 89%±2%and a yield rate of 1,350±15μg·h^(−1)·cm^(−2) at the applied potential of−0.8 V *** hydrogen electrode(RHE)as well as high stable activity with negligible current density and NH3 yield rate decays over a 30 h continue the ***,as a proof-of-concept of Zn–NO battery,it achieves a peak power density of 1.8 mW·cm^(−2) and a large NH3 yield rate of 782±10μg·h^(−1)·cm^(−2),which are comparable to the best-reported *** calculations reveal that the MoC(111)has a strong electronic interaction with NO molecules and thus lowering the energy barrier of the potential-determining step and suppressing hydrogen evolution *** work suggests that Mo-based materials are a powerful platform providing great opportunities to explore highly selective and active catalysts for NH3 production.

关键词： ammonia electrosynthesis green route molybdenum carbides(MoC)nanocrystals nitric oxide reduction reaction high selectivity

Advances of the functionalized carbon nitrides for electrocatalysis

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Carbon Energy 2022年第2期4卷 211-236页

作者： Qianqian Fan Jianan Su Tao Sun Zenghui Bi Huaisheng Wang shusheng zhang Qingju Liu Longzhou zhang Guangzhi Hu Yunnan Key Laboratory for Micro/Nano Materials&Technology School of Materials and EnergyYunnan UniversityKunmingChina School of Chemistry and Chemical Engineering Liaocheng UniversityLiaochengChina College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhouChina Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunmingChina

Over the past few decades,the design and development of carbon materials have occurred at a rapid *** particular,these porous graphene-like carbon nitride materials have received considerable attention due to their superior structures and performances in the energy transformation *** this review,nitrogenated holey two-dimensional graphene and polymeric carbon nitride will be discussed in *** structural properties,synthetic methods,and applications including electrocatalytic reactions,such as hydrogen evolution reaction,oxygen reduction reaction,oxygen evolution reaction,and nitrogen reduction reaction,will be presented in ***,we will present the outlooks on the current obstacles to the development of carbon nitride *** comprehensive understanding will help guide and motivate researchers to develop and modify carbon nitride materials with better properties in the future.

关键词： C_(2)N-h2D electrocatalysis PCN synthesis

New bienzymatic strategy for glucose determination by immobilized-gold nanoparticle-enhanced chemiluminescence

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Science China Chemistry 2009年第2期52卷 196-202页

作者： LIN JieHua zhang Hui zhang shusheng Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China

Bienzymatic biosensor for the determination of glucose by flow injection chemiluminescence(CL) de-tection was *** of gold nanoparticles(GNPs) and chitosan were chosen as the immobi-lization matrix of glucose oxidase(GOD) and horseradish peroxidase(HRP) to fabricate the biosensors with silane-pretreated glass *** the enzyme catalyzing oxidation of glucose in GOD biosensor,the produced H2O2 flowed into HRP biosensor to react with *** doped GNPs in chitosan were found to enhance the classical CL reaction of *** CL enhancement was investigated in detail by CL and UV-visible *** the optimized experimental conditions,glucose could be determined in a linear range from 0.01 to 6.0 mmol/L with a detection limit of 5.0 μmol/L at 3σ.The accuracy of the proposed method was examined by detecting the glucose level in four clinical serum samples from *** proposed method provides a new alternative to deter-mine glucose.

关键词： chemiluminescence biosensor glucose gold nanoparticles horseradish peroxidase glucose oxidase

EFFECTS OF MOLECULAR WEIGHT ON THERMAL RESPONSIVE PROPERTY OF PEGYLATED POLY-L-GLUTAMATES

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Chinese Journal of Polymer Science 2013年第2期31卷 201-201,202-210页

作者： shusheng zhang Chongyi Chen 李志波 Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences

We investigated the ring opening polymerization （ROP） of di- and tri-ethylene glycol monomethyl ether functionalized L-glutamate N-carboxyanhydrides （NCAs） using hexamethyldisilazane （HMDS） as primary initiator and 1,5,7-triazabicyclo-[4.4.0]dec-5-ene （TBD） as co-initiator. The binary initiator system afforded a living ROP for these pegylated NCAs, and a series of homopolypeptides with controlled molecular weight （MW） and low polydispersity were obtained. We then systematically studied the helical content and clouding point （CP） dependence on polypeptide MW using circular dichroism （CD） spectroscopy and turbidity measurements, respectively. We found that the helical content of both homopolypeptides increased with MW, but the triethylene glycol functionalized poly-L-glutamate （poly-L-EG3Glu） intended to form more stable or-helical structure than diethylene glycol functionalized counterpart （poly-L-EG2Glu） at similar MW. Accordingly, the CP of poly-L-EG2Glu with known end group has strong dependence on its helical content, which is essentially determined by MW. Our results suggested that the thermal responsive properties of these unique pegylated poly- L-glutamates not only rely on their chemical structure but also on their secondary structures, wh^ch is different from conventional thermal responsive polymers.

关键词： N-carboxyanhydride (NCA) Ring opening polymerization Polypeptide Helicity Thermal responsive.

A triple-combination nanotechnology platform based on multifunctional RNA hydrogel for lung cancer therapy

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Science China Chemistry 2020年第4期63卷 546-553页

作者： Junwei Li Dandan Yuan Xiangjiang Zheng Xinyue zhang Xuemei Li shusheng zhang Collaborative Innovation Center of Tumor Marker Detection Technology Equipment and Diagnosis-Therapy Integration in Universities of ShandongShandong Province Key Laboratoty of Detection Technology for Tumor MakersSchool of Chemistry and Chemical EngineeringLinyi UniversityLinyi 276005China College of Chemistry Chemical Engineering and Materials ScienceCooperative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan 250014China

Conventional cancer combination therapy usually involves systemic delivery of anticancer drugs which may lead to the destruction of normal cells and physiological toxicity due to the lack of targeting ability and toxicity of drug carriers. In the present study, a triple combination nanosystem of gene therapy, chemotherapy and phototherapy delivered by multifunctional RNA nanohydrogels(RNA NHs) was established. By taking the advantages of DNA nanotechnology and rolling circle transcription(RCT), three lung cancer inhibitor microRNA(let-7 a, microRNA 34 a, microRNA 145) hairpins were integrated in one RNA NH nanoparticle, leading to the simultaneous silencing of three targeted m RNAs. Meanwhile, RNA NH carried doxorubicin(DOX, a chemotherapy drug) as well as 5,10,15,20-tetrakis(1-methylpyridinium-4-yl) porphyrin(TMPyP4, a photosensitizer) and delivered these drugs to cancer cells. It was demonstrated that lung cancer inhibitor microRNAs integrated in RNA NHs, DOX and TMPyP4 could play a synergistic anti-cancer role in multi-drug resistance cancer cells. Under the action of aptamer sequence S6 that was modified with cholesterol, the resulting RNA NHs were condensed to feasible size without the assistance of polyelectrolyte condensation reagents and showed cancer-specific cellular targeting. Subsequently, thousands of copies of miRNA together with chemotherapy drug as well as photosensitizer were delivered to cancer cells specifically, and an ideal synergistic treatment effect was achieved in vivo, thus playing a combined role of gene therapy, chemotherapy and phototherapy. Through this study, it can be concluded that the triple combination therapy nanosystem can overcome the multidrug resistance caused by the malfunction of genes in chemotherapy and shows a great potential in the field of multifunctional synergistic cancer treatment.

关键词： RNA nanohydrogel phototherapy drug delivery gene therapy lung cancer