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Upcycling of polyethylene terephthalate to 1,4-cyclohexanedimethanol in water

science China Chemistry 2025年第5期68卷 2101-2109页

作者： Shuhui Fang Zhiwen Gao Xinrui Shi Min Zhang Wei Zhang Yue Liu State Key Laboratory of Petroleum Molecular & Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University Engineering Center for Sustainable Carbon Science and Technology East China Normal University Institute of Eco-Chongming

The recycling of waste polyethylene terephthalate（PET）, an extensively used polymer as plastic and fiber materials, has become an urgent topic due to the rapid generation and accumulation of plastic waste into the environment. Current chemical recycling approaches to depolymerize and convert PET into 1,4-cyclohexanedimethanol（CHDM）, an important chemical in the production of advanced polyesters, predominantly use organic solvents, such as alcohols or dioxane. Herein, we developed an environmentally friendly and economically viable pathway for converting PET to CHDM using water as the solvent. In this process, PET is sequentially hydrolyzed in water, hydrogenated to 1,4-cyclohexane dicarboxylic acid（CHDA）, and then reduced to CHDM. The PET conversion rate is self-enhanced in aqueous medium via acid-catalyzed hydrolysis by the generated CHDA intermediate. A Pd-based catalyst（e.g., Pd/C） selectively hydrogenates the arene ring of the PET monomer, terephthalic acid intermediate, and a Ru-Sn/C bimetallic catalyst reduces its COOH to CH2OH group. At optimized reaction conditions, a complete conversion of PET and 80.1% yield of CHDM are obtained. Alternatively, this approach can also efficiently produce CHDA from PET, with a yield up to 86.4%.

关键词： polyethylene terephthalate (PET) 1,4-cyclohexanedimethanol (CHDM) hydrogenation hydrogenolysis

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Ring-Opening Copolymerization of Biorenewable δ-Caprolactone with trans-Hexahydro-(4,5)-benzofuranone toward Closed-Loop Recyclable Copolyesters and Their Application as Pressure- Sensitive Adhesives

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Chinese Journal of Chemistry 2024年第17期42卷 2035-2042页

作者： Haining Niu Liying Wang Zihan Zhang Yalei Liu Yong Shen Zhibo Li State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdaoShandong266042China Key Laboratory of Biobased Polymer Materials Shandong Provincial Education DepartmentQingdao University of Science and TechnologyQingdaoShandong266042China

Copolymerization as an efficient strategy can provide an opportunity to create new closed-loop recyclable polymeric materials with tailored properties that are generally inaccessible to the individual *** this contribution,the bulk ring-opening copolymerization of bio-renewable-caprolactone and trans-hexahydro-(4,5)-benzofuranone was achieved to produce closed-loop recyclable copolyesters by using an organobase/urea binary catalyst at room *** obtained copolyesters exhibited composition-dependent thermal ***,the obtained copolyesters were able to depolymerize back to recover the corresponding monomers under mild conditions.

关键词： Recyclable polymers Ring-opening polymerization Copolymerization Pressure-sensitive adhesives Aliphatic polyesters

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High-performance single-component white light-emitting diodes based on donor-acceptor integrated carbon nitride

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science China Chemistry 2025年第3期68卷 1136-1143页

作者： Ning Wu Fangxu Dai Kunpeng Wang Yunhu Wang Xinyi Wang Kai Zhang Mingming Zhang Kang Liu Jixiang Xu Lei Wang Jun Xing Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science&TechnologyQingdao 266042China School of Pharmacy Jining Medical UniversityRizhao 276800China College of Sino-German Science and Technology Qingdao University of Science&TechnologyQingdao 266042China

White light-emitting diodes(WLEDs)as energy-saving light sources are widely used to alleviate the rising electric *** commercial WLEDs are blue/yellow-mixed emitting devices,which have some disadvantages,such as physiological damages of rich blue light,complex device structure and color *** is essential to develop single-component WLEDs with quasi-solar spectrum to overcome these *** we demonstrate a high-performance single-component WLED based on donor-acceptor integrated carbon nitride(DACN)*** donor-acceptor simultaneously increases the photoluminescence efficiency and the carrier mobility of graphitic carbon nitride(g-CN),hence,the DACN-based WLED reaches a milestone in maximum luminance of 2,045 cdm^(-2)and maximum external quantum efficiency of 2.2%,which are one order of magnitude higher than pristine g-CN-based ***,the DACN-based WLED emits broadband white light with color coordinates of(0.34,0.44)and a color temperature of 5,163 *** works open a way to boost optoelectronic properties of g-CN materials and show their promising application in single-component WLEDs.

关键词： carbon nitride light-emitting diode donor-acceptor white light

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Occurrence,Spatial Distribution,Sources and Risk Assessment of Per-and Polyfluoroalkyl Substances in Surface Sediments of the Yellow River Delta Wetland

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Journal of Ocean University of China 2024年第5期23卷 1263-1274页

作者： SUN Yu SHEN Nan ZHANG Dahai CHEN Junhui HE Xiuping JI Yinli WANG Haiyang LI Xianguo Key Laboratory of Marine Chemistry Theory and Technology(Ocean University of China) Ministry of EducationQingdao 266100China Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Qingdao Key Laboratory of Analytical Technology Development and Offshore Eco-Environment Conservation Qingdao 266061China The Yellow River Delta Sustainable Development Institute of Shandong Province Dongying 257100China

Per-and polyfluoroalkyl substances(PFASs)are emerging persistent organic pollutants(POPs).In this study,47 surface sediment samples were collected from the Yellow River Delta wetland(YRDW)to investigate the occurrence,spatial distribution,potential sources,and ecological risks of ***-three out of 26 targeted PFASs were detected in surface sediment samples from the YRDW,with totalΣ23PFASs concentrations ranging from 0.23 to 16.30 ng g^(-1) dw and a median value of 2.27 ng g^(-1) *** acid(PFOA),perfluorobutanoic acid(PFBA)and perfluorooctanesulfonic acid(PFOS)were the main *** detection frequency and concentration of perfluoroalkyl carboxylic acids(PFCAs)were higher than those of perfluoroal-kanesulfonic acids(PFSAs),while those of long-chain PFASs were higher than those of short-chain *** emerging PFASs substitutes were dominated by 6:2 chlorinated polyfluoroalkyl ether sulfonic acid(6:2 Cl-PFESA).The distribution of PFASs is significantly influenced by the total organic carbon content in the *** concentration of PFASs seems to be related to human activities,with high concentration levels of PFASs near locations such as beaches and *** using a positive matrix factorization model,the potential sources of PFASs in the region were identified as metal plating mist inhibitor and fluoropolymer manufacturing sources,metal plating industry and firefighting foam and textile treatment sources,and food packaging material *** risk assessment indicated that PFASs in YRDW sediments do not pose a significant ecological risk to benthic organisms in the region overall,but PFOA and PFOS exert a low to moderate risk at individual stations.

关键词： per-and polyfluoroalkyl substances Yellow River Delta wetland sediment source identification risk assessment

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Carbon nanotubes decorated FeNi/nitrogen-doped carbon composites for lightweight and broadband electromagnetic wave absorption

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Journal of Materials science & technology 2023年第27期158卷 207-217页

作者： Juhua Luo Wenxing Yan Xiaopeng Li Pengcheng Shu Jie Mei Yafan Shi School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Provincial Key Laboratory of Eco-Environmental Materials Yancheng Institute of TechnologyYancheng 224051China

Magnetic-dielectric component modulation and heterogeneous interface engineering were considered as an effective strategy for designing lightweight and broadband electromagnetic wave(EMW)***,a series of carbon nanotubes(CNTs)decorated core-shell nitrogen-doped carbon(CNTs/FeNi/NC)composites were successfully fabricated via the carbonization of CNTs/NiFe_(2)O_(4)/PDA precursors obtained by hydrothermal and polymerization *** EMW absorption(EMWA)properties of CNTs/FeNi/NC composites were explored by varying the CNTs *** the CNTs content was 15%,the minimum reflection loss(RL_(min))value was-51.13 dB at 9.52 GHz and the corresponding effective absorption band-width(EAB)value was 2.96 GHz(8.96-11.12 GHz)at 2.5 ***,the maximum EAB value can reach up to 4.64 GHz(12.80-17.44 GHz)at 1.7 *** excellent EMW attenuation capability resulted from the enhanced conductive loss,polarization loss,magnetic loss,and improved impedance *** work offers a novel reference for designing lightweight and broadband EMWA materials.

关键词： Carbon nanotubes Nano-heterogeneous interface engineering Electromagnetic wave absorption Impedance matching

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Tailoring anion-dominant solvation environment by steric-hindrance effect and competitive coordination for fast charging and stable cycling lithium metal batteries

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Journal of Energy Chemistry 2025年第6期105卷 35-43页

作者： Ruizhe Xu Anjun Hu Zhen Wang Kai Chen Jingze Chen Wang Xu Gang Wu Fei Li Jian Wang Jianping Long College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology Lithium Resources and Lithium Materials Key Laboratory of Sichuan Province The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan) State Key Laboratory of Polymer Materials Engineering College of Chemistry Sichuan University School of Materials and Energy University of Electronic Science and Technology of China Helmholtz Institute Ulm (HIU) Karlsruhe Institute of Technology (KIT)

The properties of electrolytes are critical for fast-charging and stable-cycling applications in lithium metal batteries（LMBs）.However,the slow kinetics of Li+transport and desolvation in commercial carbonate electrolytes,cou pled with the formation of unstable solid electrolyte interphases（SEI）,exacerbate the degradation of LMB performance at high current ***,we propose a versatile electrolyte design strategy that incorporates cyclohexyl methyl ether（CME） as a co-solvent to reshape the Li+solvation environment by the steric-hindrance effect of bulky molecules and their competitive coordination with other solvent *** calculations and spectral analysis demonstrate that the addition of CME molecules reduces the involvement of other solvent molecules in the Li solvation sheath and promotes the formation of Li+-PF6-coordination,thereby accelerating Li+transport ***,this electrolyte composition improves Li+desolvation kinetics and fosters the formation of inorganic-rich SEI,ensuring cycle stability under fast ***,the Li‖LiNi0.8Co0.1Mn0.1O2battery with the modified electrolyte retains 82% of its initial capacity after 463 cycles at 1 *** under the extreme fast-charging condition of 5 C,the battery can maintain 80% capacity retention after 173 *** work provides a promising approach for the development of highperformance LMBs by modulating solvation environment of electrolytes.

关键词： Lithium metal batteries Fast charging Stable cycling Solvation structure

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1D/2D CoTe_(2)@MoS_(2)composites constructed by CoTe_(2)nanorods and MoS_(2)nanosheets for efficient electromagnetic wave absorption

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Nano Research 2023年第7期16卷 10698-10706页

作者： Naixin Zhai Juhua Luo Pengcheng Shu Jie Mei Xiaopeng Li Wenxing Yan School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Provincial Key Laboratory of Eco-Environmental Materials Yancheng Institute of TechnologyYancheng 224051China

Rational design of the components and microstructure is regarded as an efficacious strategy for the high-performance electromagnetic wave absorbing(EMWA)***,the CoTe_(2)@MoS_(2)nanocomposites with CoTe_(2)nanorods and MoS_(2)nanosheets were synthesized via a hydrothermal *** microstructure and composition of the samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).The CoTe_(2)@MoS_(2)composite was composed of stacked CoTe_(2)as the core and intertwined MoS_(2)nanosheets as the *** electromagnetic parameters of the CoTe_(2)@MoS_(2)composites were investigated by vector network analyzer(VNA).The EMWA property of the composite showed a trend of first increasing and then decreasing with the increasing content of MoS_(2).When the mass ratio of MoS_(2)and CoTe_(2)was 1:1,the CoTe_(2)@MoS_(2)composite exhibited the minimum reflection loss value of-68.10 dB at 4.71 GHz,and the effective absorption bandwidth value might reach 4.64 GHz(13.08-17.72 GHz)at a matching thickness of 1.60 mm with filler loading of 50 wt.%.The extraordinary EMWA property was attributed to the optimized impedance matching,multiple scattering and reflections,dipole polarization,conductive loss,and interfacial ***,the present approach to the design of microstructure and interface engineering offers a crucial way to construct high-performance EMW absorbers.

关键词： transition metal tellurides microstructure design heterostructure engineering electromagnetic wave absorption

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Interlinked water and sediment microplastics in the Laizhou Bay of China

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Journal of Oceanology and Limnology 2025年第2期43卷 446-458页

作者： Hong CHEN Fenghua JIANG Jingxi LI Wei CAO Di ZHANG Futao ZHANG Shiliang WANG Chengjun SUN College of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Analytical Technology Development and Offshore Eco-Environment Conservation First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Qingdao National Laboratory of Marine Science and Technology Laboratory of Marine Drugs and Biological ProductsQingdao 266071China

To explore the relationship of microplastic pollution in different media in marine environment,microplastics in the surface seawater and sediments of Laizhou Bay,Bohai Sea,North China,were *** samples were collected using a pre-concentrator equipped with a 20-μm mesh size sieve,and sediment samples were collected by a box *** shape,color,size,and type of microplastics were obtained by a stereomicroscope and a Fourier transform infrared spectrometer(ATR-μ-FT-IR).Results show that the abundance of microplastics in the surface seawater of Laizhou Bay was 858.3±573.2 items/m~3,and that of microplastics in sediments was 151.0±77.4 items/kg dry weight(d.w.)The microplastics in seawater and sediments were mainly ***,the microplastics in seawater were mainly transparent,and those in sediments were transparent and *** highest proportion of microplastics in seawater was rayon(77.48%),followed by polyethylene terephthalate(PET,13.17%).The highest proportion of microplastics in sediments was rayon(73.66%),followed by PET(8.90%).The size of microplastics in 1000-2000μm accounted for the largest proportion of 28.54%in seawater,while that in 500-1000μm took 27.93%in *** in seawater and sediment showed medium-level *** seawater,microplastic abundance was higher in offshore and nearshore areas of *** sediment,microplastic abundance was higher in offshore and nearshore areas of *** results of the principal component analysis(PCA)indicated that microplastics in sediment exhibited greater stability compared to those in *** microplastics in seawater and sediment show a positive correlation in terms of shape and plastic type,while exhibiting a negative correlation in terms of ***,microplastics in sediments were smaller in size,and those in seawater and sediments had consistent size distribution characteristics in space.

关键词： microplastic Laizhou Bay sediment seawater correlation

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Decoding small peptides:Regulators of plant growth and stress resilience

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Journal of Integrative Plant Biology 2025年第3期67卷 596-631页

作者： Fei Xiao Huapeng Zhou Honghui Lin Xinjiang Key Laboratory of Biological Resources and Genetic Engineering College of Life Science and TechnologyXinjiang UniversityUrumqi 830046China Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu 610064China

Small peptides(SPs)are pivotal signaling molecules that play essential roles in the precise regulation of plant growth,development,and stress *** advancements in sequencing technologies,bioinformatics approaches,and biochemical and molecular techniques have significantly enhanced the accuracy of SP identification,unveiling their diverse biological functions in *** review provides a comprehensive overview of the characteristics and methodologies for identifying SPs in *** highlights recent discoveries regarding the biological roles and signaling pathways of SPs in regulating plant growth,development,and plant-microbial interactions,as well as their contributions to plant resilience under various environmental stresses,including abiotic stress,nutrient deficiencies,and biotic ***,we discuss current insights into the potential applications of SPs and outline future research directions aimed at leveraging these molecules to enhance plant adaptation to environmental *** integrating recent findings,this review lays a foundation for advancing the understanding and utilization of SPs to improve plant resilience and productivity.

关键词： abiotic and biotic stress responses crop improvement plant developmental regulation plant-microbe interactions small peptide signaling

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Carbon Nanofiber/Polyaniline Composite Aerogel with Excellent Electromagnetic Interference Shielding,Low Thermal Conductivity,and Extremely Low Heat Release

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Nano-Micro Letters 2025年第4期17卷 77-95页

作者： Mingyi Chen Jian Zhu Kai Zhang Hongkang Zhou Yufei Gao Jie Fan Rouxi Chen Hsing-Lin Wang School of Textile Science and Engineering Tiangong UniversityTianjin 300387People’s Republic of China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China School of Innovation and Entrepreneurship Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Guangdong Provincial Key Laboratory of Energy Materials for Electric Power Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Ministry of Education Key Laboratory of Advanced Textile Composite Materials Tiangong UniversityTianjin 300387People’s Republic of China

The rapid development of communication technology and high-frequency electronic devices has created a need for more advanced electromagnetic interference(EMI)shielding *** response to this demand,a study has been conducted to develop multifunctional carbon nanofibers(CNFs)/polyaniline(PANI)aerogels with excellent electromagnetic interference shielding,flame retardancy,and thermal insulation *** process involved freeze-drying of electrospun CNFs and PANI nanoparticles followed by in situ growth PANI to coat the CNFs,creating the core-shell structured CNFs/PANI composite fiber and its hybrid aerogels(CP-3@PANI).The interaction between PANI and aniline(ANI)provides attachment sites,allowing additional ANI adsorption into the aerogel for in situ *** results in PANI uniformly covering the surface of the CNFs,creating a core-shell composite fiber with a flexible CNF core and PANI *** process enhances the utilization rate of the ANI monomer and increases the PANI content loaded onto the ***,effective connections are established between the CNFs,forming a stable,conductive three-dimensional network *** prepared CP-3@PANI aerogels exhibit excellent EMI shielding efficiency(SE)of 85.4 dB and specific EMI SE(SE d^(-1))of 791.2 dB cm^(3)g^(-1)in the *** to the synergistic flame-retardant effect of CNFs,PANI,and the dopant(phytic acid),the CP-3@PANI aerogels demonstrate outstanding flame-retardant and thermal insulation properties,with a peak heat release rate(PHRR)as low as 7.8 W g^(-1)and a total heat release of only 0.58 kJ g^(-1).This study provides an effective strategy for preparing multifunctional integrated EMI shielding materials.

关键词： CNFs/PANI hybrid aerogels EMI shielding Flame retardancy Thermal insulation

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