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Chinese Journal of chemical engineering 2024年第2期66卷 136-144页

作者： Chenggong Song Zhenzhou Ma Xu Hou Hao Zhou Huimin Qiao Changchang Tian Li Yin Baitang Jin Enxian Yuan School of chemical engineering Changchun University of TechnologyChangchun130012China department of chemical and biomolecular engineering North Carolina State UniversityRaleighNC 27606USA School of Chemistry and chemical engineering Yangzhou UniversityYangzhou225009China

High-temperature treatment is key to the preparation of zeolite ***,the effects of hightemperature treatment on the property and performance of HZSM-5 zeolites were studied in this work.X-Ray diffraction,N2physisorption,27Al magic angle spinning nuclear magnetic resonance(MAS NMR),and temperature-programmed desorption of ammonia results indicated that the hightemperature treatment at 650℃ hardly affected the inherent crystal and texture of HZSM-5zeolites but facilitated the conversion of framework Al to extra-framework Al,reducing the acid site and enhancing the acid ***,the high-temperature treatment improved the performance of HZSM-5 zeolites in n-heptane catalytic cracking,promoting the conversion and light olefins yield while inhibiting coke *** on the kinetic and mechanism analysis,the improvement of HZSM-5 performance caused by high-temperature treatment has been attributed to the formation of extra-framework Al,which enhanced the acid strength,facilitated the bimolecular reaction,and promoted the entropy change to overcome a higher energy barrier in n-heptane catalytic cracking.

关键词： HZSM-5 n-Heptane Catalytic cracking High-temperature treatment Extra-framework Al

Chiral phonon activated spin Seebeck effect in chiral materials

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Science China(Physics,Mechanics & Astronomy) 2024年第3期67卷 149-155页

作者： Xiao Li Jinxin Zhong Jinluo Cheng Hao Chen Huiqian Wang Jun Liu Dali Sun Lifa Zhang Jun Zhou Phonon engineering Research Center of Jiangsu Province Center for Quantum Transport and Thermal Energy ScienceSchool of Physics and TechnologyNanjing Normal UniversityNanjing 210023China Center for Phononics and Thermal Energy Science China-EU Joint Lab for NanophononicsSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of ScienceChangchun 130033China department of Mechanical and Aerospace engineering North Carolina State UniversityRaleigh NC 27606USA department of Physics North Carolina State UniversityRaleigh NC 27695USA Organic and Carbon Electronics Laboratories(ORaCEL) North Carolina State UniversityRaleigh NC 27606USA

Efficient generation of spin polarization is very important for spintronics and quantum computation. In chiral materials without magnetic order nor spin-orbit coupling, we find a new spin selectivity effect—chiral phonon activated spin Seebeck(CPASS)effect. Starting with the nonequilibrium distribution of chiral phonons under a temperature gradient, the CPASS coefficients are computed based on the Boltzmann transport theory. With both the phonon-drag and band transport contributions, the spin accumulations generated by the CPASS effect exhibit quadratic dependence on the temperature gradient. The strength of the CPASS effect and the relative magnitude of both contributions are tunable by the chemical potential modulation. The CPASS effect, which gives a promising explanation on the traditional chiral-induced spin selectivity effect, provides opportunities for the exploration of advanced spintronic devices based on chiral materials even in the absence of any magnetic order and spin-orbit coupling.

关键词： spin Seebeck effect chiral phonon phonon-drag contribution efficient spin generation

Underestimated activity-based microplastic intake under scenariospecific exposures

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Environmental Science and Ecotechnology 2024年第2期18卷 124-136页

作者： Kai Liu Qingqing Li Anthony LAndrady Xiaohui Wang Yinan He Daoji Li state Key Laboratory of Estuarine and Coastal Research East China Normal University500 Dongchuan RoadShanghai200062China department of chemical and biomolecular engineering North Carolina State UniversityRaleighNC27695USA Plastic Marine Debris Research Center East China Normal University500 Dongchuan RoadShanghai200241China Regional Training and Research Center on Plastic Marine Debris and Microplastics IOC-UNESCO500 Dongchuan RoadShanghai200241China

Despite increasing alarms over the health impacts of microplastics(MPs)due to their detection in human organs and feces,precise exposure evaluations remain *** comprehend their risks,there is a distinct need to prioritize quantitive estimates in MP exposome,particularly at the environmentallyrealistic *** we used a method rooted in real-world MP measurements and activity patterns to determine the daily intake of MPs through inhalation and from ground dust/soil *** found that nearly 80%of this intake comes from residential sectors,with activity intensity and behavioral types significantly affecting the human MP *** data showed a peak in MP exposure for those aged *** compared to dietary MP intake sources like seafood,salt,and water,we identified a previously underestimated exposure from inhalation and dust/soil ingestion,emphasizing the need for more realistic evaluations that incorporate activity *** discovery raises questions about the accuracy of past studies and underscores MP's potential health ***,our time-based simulations revealed increased MP intake during the COVID-19 lockdown due to more surface dust ingestion,shedding light on how global health crises may inadvertently elevate MP exposure risks.

关键词： Microplastics Activity factors Inhalation and ingestion Simulation Exposure estimate

Opportunities and challenges for a Golden Age of chemical engineering

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Frontiers of chemical Science and engineering 2014年第1期8卷 1-7页

作者： Phillip R. WESTMORELAND department of chemical and biomolecular engineering North Carolina State University Raleigh North Carolina 27695-7905 USA

chemical engineering is entering a new Golden Age of practice, thought, and impact, accompanied by great new opportunities and challenges. Five aspects mark this development： a new abundance of hydrocarbons; the evolution of biology into a molecular science; the ubiquity of powerful computational tools; the trend in manufacturing to be more process-oriented; and the systems approach that is part of ChE education from its first stages. There are important technical challenges, including technology creation and environmental impact, but just as important are new appreciation for and attention to challenges that require societal dialogues about com- plexity, uncertainty, and evolving and sometimes contra- dictory requirements. Crucial to all these impacts is enhancing the identity of what the profession is. That must be based on recognizing that the core of chemical engineering is applying molecular sciences to create value and advance the quality of life.

关键词： hydrocarbons biotechnology computation,cyberinfrastructure manufacturing environmental

Smartphone-based cytometric biosensors for point-of-care cellular diagnostics

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Nanotechnology and Precision engineering 2020年第1期3卷 32-42页

作者： Shengwei Zhang Zheng Li Qingshan Wei department of chemical and biomolecular engineering North Carolina State UniversityRaleighNC 27606United States

Analysis on a single-cell basis is both fundamental and meaningful in biomedical research and clinical *** cytometry is one of the most popular approaches in this field with broad applications in cell sorting,counting,and identification of rare ***,the complicated design and bulky size of conventional flow cytometry have restricted their applications mainly in centralized *** the recent development of smartphone devices,smartphone-based cytometry has been explored and tested for single-cell *** with traditional cytometers,smartphone-based cytometric biosensors are more suitable for point-of-care(POC)uses,such as on-site disease diagnosis and personal health *** this review article,the history of traditional flowcytometry is introduced,and advances of smartphone-enabled cytometry are summarized in detail based on different working *** POC applications of smartphone cytometers are also *** achievements demonstrated so far illustrate the potential of smartphone-based cytometric devices to transform single-cell measurement in general,with a significant impact in POC diagnostics,preventive medicine,and cell biology.

关键词： Flow cytometry Smartphone Point-of-care diagnostics Single-cell analysis Imaging Microfluidics

Plasmonic molecular assays： Recent advances and applications for mobile health

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Nano Research 2018年第10期11卷 5439-5473页

作者： Tao Yu Qingshan Wei department of chemical and biomolecular engineering North Carolina State University 911 Partners Way Campus Box 7905Raleigh NC 27695 USA

Plasmonics-based biosensing assays have been extensively employed for biomedical applications. Significant advancements in use of plasmonic assays for the construction of point-of-care （POC） diagnostic methods have been made to provide effective and urgent health care of patients, especially in resource- limited settings. This rapidly progressive research area, centered on the unique surface plasmon resonance （SPR） properties of metallic nanostructures with exceptional absorption and scattering abilities, has greatly facilitated the development of cost-effective, sensitive, and rapid strategies for disease diagnostics and improving patient healthcare in both developed and developing worlds. This review highlights the recent advances and applications of plasmonic technologies for highly sensitive protein and nucleic acid biomarker detection. In particular, we focus on the implementation and penetration of various plasmonic technologies in conventional molecular diagnostic assays, and discuss how such modification has resulted in simpler, faster, and more sensitive alternatives that are suited for point-of-use. Finally, integration of plasmonic molecular assays with various portable POC platforms for mobile health applications are highlighted.

关键词： plasmonics molecular assay point-of-care diagnostics mobile health imaging sensing

Measurements and correlation of liquid–liquid equilibrium data for the ternary(methyl tert-butyl ketone + o, m, p-benzenediol + water)system at(333.2, 343.2 and 353.2) K

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Chinese Journal of chemical engineering 2019年第4期27卷 905-911页

作者： Kangning Xiong Shuai Shen Youchang Wang Yun Chen state Key Laboratory of Pulp and Paper engineering Department of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China department of chemical & biomolecular engineering North Carolina State University Raleigh NC 27695 USA

In this work, liquid–liquid equilibria(LLE) data for the ternary system methyl tert-butyl ketone(MTBK)+ o, m,p-benzenediol + water were investigated at 333.2 K, 343.2 K and 353.2 K under 101.3 kPa. The performance of MTBK to extract o, m, p-benzenediol from wastewaters was estimated by partition coefficients and separation factors. The Hand and Bachman equations were both applied to check the reliability of the experimental LLE data. Furthermore, the Non-Random Two-Liquid(NRTL) and Universal Quasi chemical(UNIQUAC) models were applied to correlate the measured LLE data. The results showed a good agreement with the determined ternary LLE data with the root-mean-square error(RMSE) values below 0.71%. MTBK was proved to be a promising extracting agent in extracting benzenediols from effluents.

关键词： Liquid–liquid equilibrium Methyl tert-butyl ketone Benzenediol NRTL model UNIQUAC model

Age-hardening behavior,corrosion mechanisms,and passive film structure of nanocrystalline Al-V supersaturated solid solution

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Journal of Materials Science & Technology 2023年第4期135卷 1-12页

作者： J.Christudasjustus M.R.Felde C.S.Witharamage J.Esquivel A.A.Darwish C.Winkler R.K.Gupta department of Materials Science and engineering North Carolina State UniversityRaleighNC 27606United States department of chemical Biomolecular and Corrosion EngineeringThe University of AkronAkronOH 44325United States

The effect of age-hardening on microstructure,hardness,and corrosion of an Al-5at.%V alloy,produced us-ing high-energy ball milling and subsequent cold compaction,has been *** alloy exhibited a grain size below 100 nm and extremely high solid solubility of V in Al(3.1 at.%).The age-hardening was carried out at 150,200,and 250℃.The peak-aged condition of 150℃ demonstrated the highest hardness-transpired from grain refinement,precipitation,and solid solution *** corrosion re-sistance of the Al-5at.%V alloy was studied as a function of aging *** peak-aged condition retained the corrosion resistance while it deteriorated in the over-aged ***,the cor-rosion resistance of the ball-milled Al alloys in all the aging conditions was superior to that of pure *** passive film structure and origin of corrosion were studied using scanning/transmission electron mi-croscopy(S/TEM).The high corrosion resistance of the alloy was attributed to the V enrichment at the film/metal interface and deposition of V on the cathodic phases,which suppresses the dissolution of Al within the pit and therefore promotes repassivation in the early stages of corrosion.

关键词： Al alloys Nanocrystalline alloy Age-hardening Ball milling Corrosion Hardness

Biodegradable elastomeric circuit boards from citric acid-based polyesters

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npj Flexible Electronics 2023年第1期7卷 307-320页

作者： Brendan L.Turner Jack Twiddy Michael D.Wilkins Srivatsan Ramesh Katie M.Kilgour Eleo Domingos Olivia Nasrallah Stefano Menegatti Michael A.Daniele Joint department of Biomedical engineering North Carolina State University and University of North CarolinaChapel Hill911 Oval Dr.RaleighNC 27695USA department of Electrical&Computer engineering North Carolina State University890 Oval Dr.RaleighNC 27695USA department of chemical and biomolecular engineering North Carolina State University911 Partners WayRaleighNC 27695USA Biomanufacturing Training and Education Center(BTEC) North Carolina State University850 Oval DrRaleighNC 27606USA

Recyclable and biodegradable microelectronics,i.e.,“green”electronics,are emerging as a viable solution to the global challenge of electronic ***,flexible circuit boards represent a prime target for materials development and increasing the utility of green electronics in biomedical *** board substrates and packaging are good dielectrics,mechanically and thermally robust,and are compatible with microfabrication ***(octamethylene maleate(anhydride)citrate)(POMaC)–a citric acid-based elastomer with tunable degradation and mechanical properties–presents a promising alternative for circuit board substrates and ***,we report the characterization of Elastomeric Circuit Boards(ECBs).Synthesis and processing conditions were optimized to achieve desired degradation and mechanical properties for production of stretchable *** traces were characterized and exhibited sheet resistance of 0.599Ωcm^(−2),crosstalk distance of<0.6 mm,and exhibited stable 0%strain resistances after 1000 strain cycles to 20%.Fabrication of single layer and encapsulated ECBs was demonstrated.

关键词： polyester resistance strain

Reduction kinetics of SrFeO_(3−δ)/CaO∙MnO nanocomposite as effective oxygen carrier for chemical looping partial oxidation of methane

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Frontiers of chemical Science and engineering 2022年第12期16卷 1726-1734页

作者： Xinhe Wang Liuqing Yang Xiaolin Ji Yunfei Gao Fanxing Li Junshe Zhang Jinjia Wei state Key Laboratory of Multiphase Flow in Power engineering Xi’an Jiaotong UniversityXi’an 710049China School of chemical engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China Institute of Clean Coal Technology East China University of Science and TechnologyShanghai 200237China department of chemical and biomolecular engineering North Carolina State UniversityRaleighNC 27695USA

chemical looping reforming of methane is a novel and effective approach to convert methane to syngas,in which oxygen transfer is achieved by a redox *** lots of efforts have been made to develop high-performance redox materials,a few studies have focused on the redox *** this work,the kinetics of SrFeO_(3−δ)–CaO∙MnO nanocomposite reduction by methane was investigated both on a thermo-gravimetric analyzer and in a packed-bed *** the methane reduction,combustion occurs before the partial oxidation and there exists a transition between *** weight loss due to combustion increases,but the transition region becomes less inconspicuous as the reduction temperature *** weight loss associated with the partial oxidation is much larger than that with *** rate of weight loss related to the partial oxidation is well fitted by the Avrami–Erofeyev equation with n=3(A3 model)with an activation energy of 59.8 kJ∙mol^(‒1).The rate law for the partial oxidation includes a solid conversion term whose expression is given by the A3 model and a methane pressure-dependent term represented by a power *** partial oxidation is half order with respect to methane *** proposed rate law could well predict the reduction kinetics;thus,it may be used to design and/or analyze a chemical looping reforming reactor.

关键词： chemical looping reforming SrFeO_(3−δ) CaO·MnO nanocomposite reduction kinetics Avrami–Erofeyev model pressure-dependent term