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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

Luminescence anti-counterfeiting:From elementary to advanced

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聚集体(英文)

聚集体(英文) 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

Esterification of Oleic Acid to Produce Biodiesel over 12-Tungstophosphoric Acid Anchored Two-dimensional Zeolite

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Chemical Research in Chinese Universities 2021年第5期37卷 1072-1078页

作者： PANG Hao YANG Guoju LI Lin yu jihong State Key Laboratory of Inorganic Synthesis&Preparative Chemistry College of ChemistryJilin UniversityChangchun130012P.R.China International Center of Future Science Jilin UniversityChangchun130012P.R.China Electron Microscopy Center Jilin UniversityChangchun130012P.R.China

Biodiesel has emerged as a non-toxic,biodegradable,and renewable fuel substitute that can be readily produced via the esterification reaction of free fatty *** present work explores the potential of 12-tungstophosphoric acid(TPA)anchored two-dimensional(2D)ITQ-2 zeolite(TPA/ITQ-2)as heterogeneous acid catalysts for biodiesel ***/ITQ-2 material was prepared by swelling,delamination,and subsequent wetness incipient impregnation approach.

关键词： zeolite swelling dimensional

Roles of Hydroxyl Groups during Side-Chain Alkylation of Toluene with Methanol over Zeolite Na-Y： A Density Functional Theory Study

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Chinese Journal of Chemistry 2017年第5期35卷 716-722页

作者： Xu Li Junran Lu Yi Li jihong yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun Jilin 130012 China

The side-chain alkylation of toluene with methanol over alkali-cation-containing zeolite Y is an important reaction for industrial production of styrene,but the exact mechanism of this reaction is still *** most accepted opinion is that the Lewis acid-base sites in zeolite Y activate the transformation from methanol to formaldehyde,the side-chain alkylation of toluene with formaldehyde,and the formation of 2-phenylethanol and styrene *** this study,we investigate the roles of various types of hydroxyl groups that could possibly exist in zeolite Na-Y during this reaction,including the Br6nsted acid sites and the terminal Al-OH and Si-OH groups,*** density functional theory （DFT） calculations,we find that the Brtnsted acid sites in Na-Y may catalyze the ring alkylation of toluene and be responsible for the formation of xylene,a side product discovered in *** importantly,we find,for the first time,a new reaction pathway from 2-phenylethanol to styrene over various types of hydroxyl groups in Na-Y,which is kinetically more favorable than the conventional *** to our calculation results,the most possible mechanism for this styrene production process may involve reactions over both the Lewis acid-base sites and the hydroxyl groups in Na-Y.

关键词： zeolites heterogeneous catalysis hydroxyl groups density functional calculations

One-Pot Three-Dimensional Printing Robust Self-Supporting MnO_(x)/Cu-SSZ-13 Zeolite Monolithic Catalysts for NH_(3)-SCR

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CCS Chemistry 2022年第5期4卷 1708-1719页

作者： Yingzhen Wei Mengyang Chen Xiaoyu Ren Qifei Wang Jinfeng Han Wenzheng Wu Xiangguang Yang Shuang Wang jihong yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012 International Center of Future Science Jilin UniversityChangchun 130012 School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130025 State Key Laboratory of Rare Earth Resource Utilization Jilin Province Key Laboratory of Green Chemistry and ProcessChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 Henan Province Function-Oriented Porous Materials Key Laboratory College of Chemistry and Chemical EngineeringLuoyang Normal UniversityLuoyang 471934

Honeycomb cordierite coated with Cu-SSZ-13 zeolite is widely used for the selective catalytic reduction of NO_(x) with NH_(3)(NH_(3)-SCR)to reduce pollutants from vehicle ***,conventional honeycomb catalysts fabricated via coating techniques are limited by low zeolite loadings,loss of the deposited zeolites,and complicated preparation ***,a facile,one-step three-dimensional(3D)printing strategy is developed to construct MnO_(x)/Cu-SSZ-13 monolithic catalysts with excellent catalytic performance for NH_(3)-***-containing halloysite nanotubes(Fe-HNTs)are introduced as printing ink additives to ensure mechanical stability and modulate the NH_(3)-SCR performance of monolithic catalysts in high temperature *** situ incorporation of Mn into the Cu-SSZ-13 zeolite monoliths during the 3D printing process boosts the mechanical strength of the monolithic structures from 2.54 MPa to 4.33 MPa as well as broadens the temperature window(165-550℃)of the catalysts for NH_(3)-SCR with NO_(x) conversion of above 80%.Such robust multicomponent-integrated 3D-printed selfsupporting catalysts not only possess high zeolite loading and excellent catalytic activity,but also avoid complicated manufacturing processes,which contrasts with conventional honeycomb catalysts fabricated by extrusion coupled with coating.

关键词： 3D printing metal-doped Cu-SSZ-13 zeolites NH_(3)-SCR monolithic catalysts mechanical strength

Celebrating 35 years of Chemical Research in Chinese Universities

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Chemical Research in Chinese Universities 2020年第1期36卷 I0001-I0002页

作者： yu jihong 不详

The year of 2020 marks 35 years since the launch of Chemical Research in Chinese *** take this opportunity to celebrate the 35 th anniversary of our journal with this special *** Research in Chinese Universities is under the direct jurisdiction of the Ministry of Education and sponsored by Jilin University,which is a bi-monthly comprehensive research journal covering a variety of chemistry related subject areas.

关键词： journal Jilin covering

Systematic Study of Ti-Distribution in Titanosilicate *BEA Zeolites via Symmetry-Adapted Enumeration

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Chinese Journal of Chemistry 2019年第6期37卷 593-596页

作者： Lin Li Jiaze Wang Yi Li jihong yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin University2699 Qianjin StreetChangchunJilin 130012China International Center of Future Science Jilin UniversityChangchunJilin 130012China

The high performance of titanosilicate zeolites in various industrial oxidation reactions is highly affected by the distribution of Ti atoms in their frameworks. Because of their structural complexity, previous theoretical studies mainly focus on the preferential location of single Ti atoms within the unit cells of titanosilicate zeolites. When multiple Ti atoms are required, conventional approaches consider only symmetrically related T sites to reduce the computation complexity. Such symmetry-constrained approaches obviously overlooked many possible configurations. Herein, we conduct a systematic study on the distribution of two Ti atoms in the unit cell of titanosilicate zeolite *BEA. Different from conventional symmetry-constrained approaches, we introduce two Ti atoms simultaneously without any constraint and adopt a symmetry-adapted algorithm to enumerate all possible configurations for double-Ti introduction. We generate a total of 273 distinct configurations and analyze the Ti-distribution via Boltzmann statistics. We find that many of the configurations overlooked by conventional symmetry-constrained approaches indeed exhibit more feasible energies, which may lead to different Ti-distributions. Our study indicates the necessity of unconstrained introduction of Ti atoms when multiple-Ti atoms are considered for calculations.

关键词： zeolites BEA topology Ti-distribution thermodynamics Boltzmann statistics high-throughput calculation

THEORY AND EXPERIMENTAL INVESTIGAION OF FLEXURAL WAVE PROPAGATION IN THIN RECTANGULAR PLATE WITH PERIODIC STRUCTURE

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Chinese Journal of Mechanical Engineering 2005年第3期18卷 385-388页

作者： Wen jihong yu Dianlong Wang Gang Zhao Hongang Liu Yaozong College of Mechatronics Engineering and Automation National University of Defense Technology Changsha 410073 China

With the idea of the phononic crystals, a thin rectangular plate with two-dimensional periodic structure is designed. Flexural wave band structures of such a plate with infinite structure are calculated with the plane-wave expansion （PWE） method, and directional band gaps are found in the ΓX direction. The acceleration frequency response in the ΓX direction of such a plate with finite structure is simulated with the finite element method and verified with a vibration experiment. The frequency ranges of sharp drops in the calculated and measured acceleration frequency response curves are in basic agreement with those in the band structures. Thin plate is a widely used component in the engineering structures. The existence of band gaps in such periodic structures gives a new idea in vibration control of thin plates.

关键词： Phononic crystals Flexural wave band gaps Thin rectangular plate

Themed Issue on Women in Chemistry

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Chemical Research in Chinese Universities 2021年第5期37卷 I0001-I0002页

作者： CHI Lifeng yu jihong Soochow University Jilin University

Female chemical scientists are an important talent resource in chemical research world-wide,paticularly in China,with many extrordinary women in all disciplines of *** special issue on Women in Chemistry aims to demonstrate the importance of women in various fields of chemistry and encourage young female scientists to enhance their professional confidence,which is conducive to promoting chemical research.

关键词： chemistry. ordinary encourage