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The state-of-the-art synthetic strategies for SAPO-34 zeolite catalysts in methanol-to-olefin conversion

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National Science Review 2018年第4期5卷 542-558页

作者： Qiming Sun Zaiku Xie jihong yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University International Center of Future Science Jilin University SINOPEC Corporation Science and Technology Development Department

Methanol-to-olefin(MTO)conversion has proven to be one of the most successful non-petrochemical routes for producing light ***(SAPO)zeolite SAPO-34 is one of the best industrial catalysts for MTO conversion,but suffers from rapid deactivation due to the inherent diffusion bottleneck limited by the narrow eight-ring pore *** improve the MTO performance,considerable synthetic efforts have been devoted to decrease the crystal size of zeolites or introduce secondary larger pores in zeolite crystals to form hierarchical *** review mainly focuses on presenting the state-of-the-art synthetic strategies for nanosized and hierarchical SAPO-34 catalysts with excellent MTO ***,the industrialization of SAPO-34 catalysts for the MTO reaction,and some current problems and future prospects for the synthesis of SAPO-34 catalysts,are also pointed *** expect that this review can not only shed some light on the preparation of SAPO-34 catalysts,but also stimulate the future development of high-performance SAPO-34 catalysts to meet the increasing demands of the chemical industry.

关键词： methanol-to-olefin zeolites SAPO-34 hierarchically porous structure nanocrystals heterogeneous catalysis

Preface to special topic on new era of zeolite science

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National Science Review 2022年第9期9卷 6-7页

作者： jihong yu Dongyuan Zhao State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry International Center of Future Science Jilin University NSR Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Laboratory of Advanced Materials and Collaborative Innovation Center of Chemistry for Energy Materials(iChEM) Fudan University

Zeolites are crystalline microporous solids whose frameworks are composed of corner-sharing tetrahedral TO4 units (T=Si,Al, P, etc.), forming periodic one-dimensional (1D) to threedimensional (3D) channels with an aperture size of typically<2 nm. Because of their unique pore structures, large specific surface area, strong acid sites, high thermal/hydrothermal stability and molecular-level shape selectivity, zeolites are widely used as catalysts, adsorbents and ion exchangers in the fields of oil refining, petrochemical industry, coal chemical industry and daily chemical industry.

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Layer-by-Layer Approach to Superhydrophobic Zeolite Antireflective Coatings

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Chinese Journal of Chemistry 2018年第1期36卷 51-54页

作者： Jianan Zhang jihong yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun Jilin 130012 China College of Materials Science and Engineering Zhengzhou University Zhengzhou Henan 450001 China International Center of Future Science Jilin University Changchun Jilin 130012 China

Antireflection surfaces and coatings have attracted considerable interests because they can maximize light transmittance of the substrates. In this work, zeolite antireflective （ZAR） coatings are prepared via layer-by-layer （LBL） assembly of MFI-type zeolite silicalite-1 and polyelectrolyte. A micro- and macroporous hierarchical structure was obtained which contributes to the antireflective property of the zeolite coatings. The light transmittance of the coating on quartz can achieve as high as 99.3% at 650 nm. Furthermore, a superh~/drophobic ZAR coating can be obtained by chemical modification with 1H,1H,2H,2H-perfluorooctyl-triethoxysilane. This work demonstrates that zeolites are excellent candidates as high transparent superhydrophobic coatings.

关键词： zeolite MFI coating layer-by-layer assembly antireflection superhydrophobicity

Entropy-driven self-assembly of chiral nematic liquid crystalline phases of AgNR@Cu20 hyper branched coaxial nanorods and thickness-dependent handedness transition

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Nano Research 2018年第2期11卷 1018-1028页

作者： Guiqing Cheng yu Wang Kun Liu jihong yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun China State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun China

The chiral nematic liquid crystalline phase （CNLCP） of noble metal nanorods induces a strong chiroptical response due to their intrinsic physical and chemical properties. Here, we demonstrate that the formation of CNLCP of Ag nanorods （AgNRs） originates from their bent-shape and is the result of purely entropic effects. The chirality of the liquid crystalline phase of AgNR@Cu20 hyper branched coaxial nanorods （HBCNRs） can be switched from left-handed to right-handed by increasing Cu20 thickness. It is proposed that the increase of coating thickness decreases the curvature of nanorods, which induces variation of the twist constant （/〈2） and bend elastic constant （K3）. The increased thickness also changes the direction of director with respect to the helical axis. In addition, hydrogen bonds can break the CNLCP, which can be attributed to their stronger effection compared to van der Waals forces and electrostatic interactions. In contrast to the variation of coating thickness, the surface morpholog~ constituents of the hybrid building blocks and polarity of the solvents do not play important roles in the handedness transition of the liquid crystalline phase. Furthermore, the results presented here give insight into the structure-property relationship and our strategy provides guidance for the synthesis of other inorganic chiral suDrastructures driven bv entroDic effects.

关键词： chirality circular dichroism Ag nanorod(AgNR)@Cu2O liquid crystals chiroptical response

Celebrating 40 Years of Chemical Research in Chinese Universities

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Chemical Research in Chinese Universities 2024年第4期40卷 561-563页

作者： yu jihong WANG Dan State Key Laboratory of Inorganic Synthesis and Preparative Chemistry International Center of Future ScienceJilin UniversityChangchun 130012P.R.China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and DeliveryInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China

Chemical Research in Chinese Universities was founded in 1984 as a comprehensive academic journal in the field of *** has since become a repository of intellectual treasures,documenting the evolving landscape of chemical science within the academic *** the past 40 years,Chemical Research in Chinese Universities has witnessed the rapid development of chemical research in universities.

关键词： chemistry. landscape journal

Help from space:grant-free massive access for satellite-based IoT in the 6G era

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Digital Communications and Networks 2022年第2期8卷 215-224页

作者： Neng Ye jihong yu Aihua Wang Rongrong Zhang School of Information and Electronics Beijing Institute of TechnologyBeijing100081China Information Engineering College Capital Normal UniversityBeijing100048China

The Sixth-Generation(6G)standard for wireless communications is expected to realize ubiquitous coverage for massive Internet of Things(IoT)networks by ***-based communications are recognized as a highly promising technical enabler to satisfy IoT service requirements in the 6G *** study analyzes multiple access technologies,which are essential for the effective deployment of satellite-based ***,we thoroughly investigate the existing research related to massive access,including information-theory considerations as well as Non-Orthogonal Multiple Access(NOMA)and Random Access(RA)***,we explore the influence of the satellite transmission environment on multiple access *** on this study,a Non-orthogonal Massive Grant-Free Access(NoMaGFA)scheme,which reaps the joint benefits of RA and NOMA,is proposed for asynchronous transmissions in satellite-based IoT to achieve improved system throughput and enhance the system robustness under varying ***,we identify some important and interesting future developments for satellite-based IoT,including waveform design,transceiver design,resource allocation,and artificial intelligence-enhanced design.

关键词： Internet of things Satellite communications Non-orthogonal multiple access Random access Asynchronous transmission

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On efficient key tag writing in RFID-enabled IoT

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Science China(Information Sciences) 2021年第6期64卷 252-254页

作者： Pengfei ZHANG Hao LIU jihong yu School of Information and Electronics Beijing Institute of Technology

Dear editor,Radio-frequency identification(RFID) can provide data in an energy-efficient and low-cost way for data-driven intelligent decisions in emerging Industrial IoT [1]. In RFID systems, tags store information of physical objects and can be attached to these objects [2–5]. Tags can capture energy in the RF signal of a nearby RFID reader for data transmission [6].

关键词： tag On efficient key tag writing in RFID-enabled IoT

Efficient transesterification over two-dimensional zeolites for sustainable biodiesel production

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Green Energy & Environment 2020年第4期5卷 405-413页

作者： Hao Pang Guoju Yang Lin Li jihong yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin University2699 Qianjin StreetChangchun 130012China International Center of Future Science Jilin University2699 Qianjin StreetChangchun 130012China Electron Microscopy Center Jilin University2699 Qianjin StreetChangchun 130012China

Basic zeolites have shown great potential as efficient catalysts for biodiesel production in the transesterification ***,conventional three-dimensional(3D)basic zeolites generally suffer from limited base sites and severe mass-transfer restriction,thereby suppressing their catalytic ***,2D basic zeolites with large external surface areas,hierarchical characteristics,and abundant accessible and stable base sites are prepared by expansion,delamination and subsequent solid-state ion-exchange(SSIE)*** facile SSIE method provides more advantages in stabilizing and dispersing high concentration of strong basic sites than the conventional liquid-phase ion-exchange(LIE)*** to the excellent mass transportation and stable basic sites,the 2D Na/ITQ-2 prepared by the SSIE approach shows remarkably enhanced activity and recyclability in the transesterification of triglycerides to produce biodiesel,compared to 3D zeolites and other reported basic *** work will open the boulevard to the rational design of 2D basic catalysts and expand the potential application of 2D zeolites to biodiesel production and other industrial reactions involving bulky molecules.

关键词： Biodiesel Zeolites Two-dimensional Transesterification Solid-state ion-exchange

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Luminescence anti-counterfeiting:From elementary to advanced

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Aggregate 2021年第1期2卷 20-34页

作者： Xiaowei yu Hongyue Zhang jihong yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchunP.R.China International Center of Future Science Jilin UniversityChangchunP.R.China

Luminescence anti-counterfeiting derives from the easily changeable luminescence behaviors of luminescence materials under the regulation of various external stimuli(such as excitation light,chemical reagent,heat,and mechanical force,etc.)and luminescence lifetime,which plays an important role in preventing forgery of currency,artworks,and product *** to the numbers of changes of anti-counterfeiting labels under various regulation conditions,luminescence anti-counterfeiting can be classified into three levels from elementary to advanced:single-level anti-counterfeiting,double-level anti-counterfeiting,and multilevel *** this review,the recent achievements in luminescence anti-counterfeiting are summarized,and the regulation of various factors to anti-counterfeiting labels is ***,existing problems,future challenges,and possible development directions are proposed in order to realize facile,quick,low-cost,environmentally friendly,and difficult-to-replicate advanced luminescence anti-counterfeiting.

关键词： anti-counterfeiting down conversion external stimuli lifetime luminescence up conversion