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Preparation and performance of novel magnetic phase-change-microcapsule-supported Bi_(2)WO_(6)catalyst

Chinese Chemical Letters 2024年第3期35卷 158-161页

作者： Zhuoni Jiang Zhiqing Ge Shuo Yan Jingjing Shu Mozhen Wang Xuewu Ge Key Laboratory of Precision and Intelligent Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China School of Materials Science and Engineering Southwest University of Science and TechnologyMianyang 621010China

The design and synthesis of novel photocatalyst with self-temperature control function is an important topic in the field of advanced environmental functional *** this work,submicron-sized magnetic phase change microcapsules composed of paraffin core and Fe_(3)O_(4)-loaded silica shell are prepared,on which the Bi_(2)WO_(6)crystals is grown in situ through hydrothermal reaction to obtain novel magnetic phase-change-microcapsule-supported Bi_(2)WO_(6)catalyst(MP@FS/BWO).The MP@FS/BWO has a paraffin encapsulation ratio of 57.1%,and the phase change enthalpy of 105.1 J/g in a temperature range of 50–60℃,which endows the MP@FS/BWO with a certain self-temperature regulation ***@FS/BWO shows excellent catalytic performance in the decomposition of rhodamine B under the simulated sunlight *** the light source is turned off,it still has good catalytic ability by maintaining high temperature due to its temperature control function based on the phase transition *** MP@FS/BWO can be easily recycled by magnetic separation and shows good structural stability and *** work provides a new idea for the development of long-effect and energy-saving outdoor photocatalysts.

关键词： Photocatalyst Phase change microcapsules Self-temperature regulation Bismuth tungstate Magnetic separation

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Ir(Ⅲ)-based Ratiometric Hypoxic Probe for Cell Imaging

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Chinese Journal of polymer science 2023年第5期41卷 794-801,I0011页

作者： Shi-Lu Ji Hua-Min Lan Sen-Sen Zhou Xiao-Ke Zhang Wei-Zhi Chen Xi-Qun Jiang Department of Polymer Science&Engineering College of Chemistry&Chemical EngineeringNanjing UniversityNanjing 210093China College of Science Nanjing Forestry UniversityNanjing 210037China

Two new ratiometric hypoxia probes(Ir-C343 and Ir-GFP)are synthesized by covalently incorporating florescent internal standard molecules coumarin 343(C343)and green fluorescent protein(GFP)into bis[1-(9,9-dimethyl-9H-fluoren-2-yl)-isoquinoline](succinylacetone)Ir(Ⅲ)(Ir-fliq),*** connecting with internal standard molecules,the Ir-fliq moiety still exhibits high sensitivity to oxygen concentration,while the fluorescence intensity of the internal standard remains relatively constant under different oxygen *** a result,a ratiometric response is realized that is only related to oxygen *** addition,Ir-GFP shows more promising applications in the ratiometric hypoxia imaging of cells due to its long excitation wavelength,good water solubility,high biocompatibility,and low relative fluorescence intensity compared with the phosphorescent emitter Ir-fliq.

关键词： Hypoxia probe Ratiometric probe Hypoxic response Cell imaging

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Surface-modified Ag@Ru-P25 for photocatalytic CO_(2) conversion with high selectivity over CH_(4) formation at the solid–gas interface

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Carbon Energy 2024年第1期6卷 182-196页

作者： Chaitanya B.Hiragond Sohag Biswas Niket SPowar Junho Lee Eunhee Gong Hwapyong Kim Hong Soo Kim Jin-Woo Jung Chang-Hee Cho Bryan M.Wong Su-Il In Department of Energy Science&Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea Department of Chemical&Environmental Engineering Materials Science&Engineering ProgramDepartment of ChemistryDepartment of Physics&AstronomyUniversity of California-RiversideRiversideCaliforniaUSA Department of Physics and Chemistry Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea NiceScience Corporation DaeguRepublic of Korea

Systematic optimization of the photocatalyst and investigation of the role of each component is important to maximizing catalytic activity and comprehending the photocatalytic conversion of CO_(2) reduction to solar fuels.A surface-modified Ag@Ru-P25 photocatalyst with H_(2)O_(2) treatment was designed in this study to convert CO_(2) and H_(2)O vapor into highly selective *** doping followed by Ag nanoparticles(NPs)cocatalyst deposition on P25(TiO_(2))enhances visible light absorption and charge separation,whereas H_(2)O_(2) treatment modifies the surface of the photocatalyst with hydroxyl(–OH)groups and promotes CO_(2) ***-resonance transmission electron microscopy,X-ray photoelectron spectroscopy,X-ray absorption near-edge structure,and extended X-ray absorption fine structure techniques were used to analyze the surface and chemical composition of the photocatalyst,while thermogravimetric analysis,CO_(2) adsorption isotherm,and temperature programmed desorption study were performed to examine the significance of H_(2)O_(2) treatment in increasing CO_(2) reduction *** optimized Ag1.0@Ru1.0-P25 photocatalyst performed excellent CO_(2) reduction activity into CO,CH4,and C2H6 with a~95%selectivity of CH4,where the activity was~135 times higher than that of pristine TiO_(2)(P25).For the first time,this work explored the effect of H_(2)O_(2) treatment on the photocatalyst that dramatically increases CO_(2) reduction activity.

关键词： gas-phase CO_(2) reduction H_(2)O_(2) treatment plasmonic nanoparticles solar fuel photocatalyst surface modification

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Eco-friendly biodegradable foam composite from natural rubber and cassava starch

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polymers from Renewable Resources 2025年第1期16卷 23-38页

作者： Vudjung, Chaiwute Boonyod, Saowaluk Tongkhamwan, Wichan Khawdas, Wichean Phansroy, Nichanan Rubber and Polymer Technology Program Department of Chemistry Faculty of Science Ubon Ratchathani University Warinchamrap Thailand Research Group Department of Chemistry Faculty of Science Ubon Ratchathani University Warinchamrap Thailand Yamagata University Yonezawa Yamagata Jonan Japan Pathumthani Thailand

We thoroughly investigated eco-friendly biodegradable foam from natural rubber (NR) and cassava starch (CS);NR/CS foams. NR, CS, polyethylene glycol (PEG) as a plasticizer, dicumyl peroxide (DCP) as a crosslinker, and azodicarbonamide (ADC) as a blowing agent were compounded in an internal mixer and subsequently cooled down using a two-roll mill. The effect of CS and PEG content on the properties of NR/CS foams was investigated. As evidenced by Mooney viscosity measurement, the viscosity of NR/CS compounds increased with higher CS contents, whereas the viscosity decreased with increasing PEG contents. The rise in viscosity in the NR/CS compounds resulted in increased pore size of NR/CS foams, with pore dimension expanding from 42 to 144 µm as viscosity increased from 17 to 50 ML 1 + 4 at 100°C. The increase in the CS contents in NR/CS foams resulted in an overall decrease in tensile strength, elongation at break, and rebound resilience but provided greater biodegradability. The foam containing 250 phr of CS exhibited a weight retention of only 32% after 1 month of soil burial. On the contrary, with increasing PEG contents, the tensile strength and elongation at break of the NR/CS foams showed an increasing trend. However, rebound resilience and biodegradability decreased. The pore size of the NR/CS foams is a key factor in the water and vegetable oil swelling behavior. The water and vegetable oil swelling increased with an increasing pore size of NR/CS foams. These findings indicated that NR/CS foam has significant potential for various applications, including shockproof and food packaging, while also contributing to the reduction of environmental problems. © The Author(s) 2024.

关键词： Tensile strength

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Room-Temperature Self-Healing Glassy Thermosetting polymers via Defective Network Design

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CCS chemistry 2025年第5期7卷 1534-1542页

作者： Hao Wang Biqiang Jin Haitao Wu Changcheng Wang Jinrong Wu State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065 Department of Chemistry and Biotechnology School of EngineeringThe University of TokyoBunkyo-kuTokyo 113-8656

Glassy thermosetting polymers,which possess excellent mechanical properties,structural stability,and solvent resistance,cannot be healed and recycled due to the irreversible crosslinking *** adaptive networks could address these drawbacks,as their chemical networks are able to shuffle dynamic covalent bonds through exchange reactions,which nevertheless need high temperature or solvent *** we report a room-temperature self-healing glassy thermoset enabled by designing a disulfide-bond and H-bond hybridized network carrying abundant dangling chains,which are commonly known as network“defects.”However,the“defects”do not plasticize the polymer,as they are bound to network chains through ***,the polymer possesses high modulus and strength at room ***,the“defects”can drive the metathesis reaction of disulfide bonds and the rearrangement of H-bonds in the glassy state,enabling the thermosetting network to self-heal at and even below room temperature.

关键词： glassy thermosetting polymers covalent adaptive networks self-healing defects room temperature

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A single-domain protein catenane of dihydrofolate reductase

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National science Review 2023年第11期10卷 128-137页

作者： Jing Fang Tianzuo Li Jiyeon Lee Dahye Im Lianjie Xu Yajie Liu Jongcheol Seo Wen-Bin Zhang Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry & Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking University Department of Chemistry Pohang University of Science and Technology (POSTECH) Beijing Academy of Artificial Intelligence

A single-domain protein catenane refers to two mechanically interlocked polypeptide rings that fold synergistically into a compact and integrated structure, which is extremely rare in nature. Here, we report a single-domain protein catenane of dihydrofolate reductase(cat-DHFR). This design was achieved by rewiring the connectivity between secondary motifs to introduce artificial entanglement and synthesis was readily accomplished through a series of programmed and streamlined post-translational processing events in cells without any additional in vitro reactions. The target molecule contained few exogenous motifs and was thoroughly characterized using a combination of ultra-performance liquid chromatography–mass spectrometry, sodium dodecyl sulfate–polyacrylamide gel electrophoresis, protease cleavage experiments and ion mobility spectrometry–mass spectrometry. Compared with the linear control, cat-DHFR retained its catalytic capability and exhibited enhanced stability against thermal or chemical denaturation due to conformational restriction. These results suggest that linear proteins may be converted into their concatenated single-domain counterparts with almost identical chemical compositions, well-preserved functions and elevated stabilities, representing an entirely new horizon in protein science.

关键词： cellular synthesis catenane protein domain chemical topology DHFR

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A highly visible-transparent thermochromic smart window with broadband infrared modulation for all-season energy savings

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National science Review 2025年第2期12卷 197-207页

作者： Yi Jiang Yunlong Wang Deshuo Kong Zipeng Chen Zhengwei Yang Ningning Cao Haowen Chi Shining Zhu Qiuhong Zhang Jia Zhu Bin Zhu National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsFrontiers Science Center for Critical Earth Material Cycling Collaborative Innovation Center of Advanced MicrostructuresNanjing University Key Laboratory of High Performance Polymer Material and Technology of MOE Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringNanjing University

Thermochromic smart windows effectively reduce the energy consumption for buildings through passive light modulation including the transmission of visible(TVis) and near-infrared(TNIR) light, and the emissivity of mid-infrared light(εMIR) in response to ambient temperature change. However,thermochromic windows that maintain high TViswhile modulating TNIRand εMIRsimultaneously are highly desirable but still challenging. Here, we develop a thermochromic smart window based on a two-way shape memory polymer to enable reversible transformation and achieve TNIRmodulation of 44.0% and εMIRmodulation of 76.5% while maintaining high TVis（>50%）. Compared to traditional windows based on silica glass, this device shows 4℃ lower temperature in summer daytime, 2℃ higher in winter daytime,and 1℃ higher in spring nighttime. It is expected that our device can achieve greater annual energy savings in comparison with commercial glass anywhere in the world and promote the progress of thermochromic windows for energy-efficient buildings.

关键词： thermochromic smart window visible transparency infrared modulation two-way shape memory polymer

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An Effective Platform for SARS-CoV-2 Prevention by Combining Neutralization and RNAi Technology

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Chinese Journal of polymer science 2023年第3期41卷 327-333,I0005页

作者： Jun-Xiang Zhou Xue Yin Hao-Jun Liang Department of Polymer Science and Engineering Hefei National Research Center for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) University of Science and Technology of China

At present,the coronavirus disease 2019(COVID-19)pandemic is a global health *** all over the globe are urgently looking forward to an effective solution to prevent the spread of the epidemic and avoid more casualties at an early *** this study,we establish an effective platform for the prevention of SARS-CoV-2 by combining the neutralization strategy and RNAi *** protect normal cells from infection,the customized cells are constructed to stably express viral antigenic receptor ACE2 on the cell *** modified cells are used as bait for inducing the viral *** transcription and replication activities of viral genome are intercepted subsequently by the intracellular sh RNAs,which are complementary to the viral gene fragments.A pseudotyped virus reconstructed from the HIV lentivirus is utilized as a virus model,by which we validate the feasibility and effectiveness of our strategy in *** work establishes an initial model and lays the foundation for future prevention and treatment of various RNA viruses.

关键词： SARS-CoV-2 Neutralization ACE2 RNAi Pseudotypedvirus

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Polyacrylonitrile Nanofber‑Reinforced Flexible Single‑Ion Conducting polymer Electrolyte for High‑Performance,Room‑Temperature All‑Solid‑State Li‑Metal Batteries

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Advanced Fiber Materials 2022年第3期4卷 532-546页

作者： Hui Cheng Chaoyi Yan Raphael Orenstein Mahmut Dirican Shuzhen Wei Nakarin Subjalearndee Xiangwu Zhang Fiber and Polymer Science Program Department of Textile EngineeringChemistry and ScienceWilson College of TextilesNorth Carolina State UniversityRaleighNC 27695USA

Single-ion conducting polymer electrolytes(SIPEs)can be formed by anchoring charge delocalized anions on the side chains of a crosslinked polymer matrix,thereby eliminating the severe concentration polarization efect in conventional dual-ion polymer *** of a plasticizer into the polymer matrix confers advantages of both liquid and solid ***,plasticized SIPEs usually face a trade-of between conductivity and mechanical *** insufcient strength,potentially there is short-circuiting failure during *** address this challenge,a simple and mechanicallyrobust SIPE was developed by crosslinking monomer lithium(4-styrenesulfonyl)(trifuoromethylsulfonyl)imide(LiSTFSI)and crosslinker poly(ethylene glycol)diacrylate(PEGDA),with plasticizer propylene carbonate(PC),on electrospun polyacrylonitrile nanofbers(PAN-NFs).The well-fabricated polymer matrix provided fast and efective Li^(+) conductive pathways with a remarkable ionic conductivity of 8.09×10^(-4) S cm^(−1) and a superior lithium-ion transference number close to unity(t_(Li+)=0.92).The introduction of PAN-NFs not only improved the mechanical strength and fexibility but also endowed the plasticized SIPE with a wide electrochemical stability window(4.9 V ***^(+)/Li)and better cycling *** longterm lithium cycling stability and dynamic interfacial compatibility were demonstrated by lithium symmetric cell *** importantly,the assembled all-solid-state Li metal batteries showed stable cycling performance and remarkable rate capability both in low and high current ***,this straightforward and mechanically reinforced SIPE exhibits great potential in the development of advanced all-solid-state Li-metal batteries.

关键词： Single-ion conducting polymer electrolyte Electrospun nanofbers Mechanical properties All-solid-state batteries Rate capability

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Potential use of Ulva intestinalis-derived biochar adsorbing phosphate ions in the cultivation of winter wheat Tristicum aestivum

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Bioresources and Bioprocessing 2024年第1期11卷 371-394页

作者： Natalia Niedzbała Ewa Lorenc-Grabowska Piotr Rutkowski Jacek Chęcmanowski Anna Szymczycha-Madeja Maja Wełna Izabela Michalak Department of Advanced Material Technologies Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland Department of Process Engineering and Technology of Polymer and Carbon Materials Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland Department of Analytical Chemistry and Chemical Metallurgy Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland

In this work,the properties of biochar produced from green macroalga Ulva intestinalis by pyrolysis were studied at temperatures of 300,500,and 700°*** biochar was characterized in terms of multielemental composition,BET surface area,total pore volume,and biosorption properties toward phosphate *** produced at 700°C-25 m2/g had the highest surface *** kinetics and isotherms of sorption processes of phosphate ions as sorbate by these sorbents were *** biochar was able to remove 84.3%of phosphate ions from wastewater,whereas non-modified biochar-only 40.6%.Hence,biochar enriched with phosphate ions can serve as a valuable soil *** experiments performed on winter wheat(Triticum aestivum)with a 3%addition of dry Ulva intestinalis,pristine biochar,and Mg-modified biochar enriched with phosphate ions showed that these amendments stimulated plant growth(length and fresh weight of plants)as well as enlarging the chlorophyll content in *** results indicate that the production of biochar(pristine and Mg-impregnated)is a sustainable option to valorize the biomass of seaweeds,and to recycle phosphorus from wastewater.

关键词： Green seaweed Pyrolysis Biochar Phosphate ions Wastewater treatment Soil additives

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