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A Biomass-Based Hydrogel Evaporator Modified Through Dynamic Regulation of Water Molecules:Highly Efficient and Cost-Effective

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Energy & Environmental materials 2023年第3期6卷 20-30页

作者： Boqiu Luo Jin Wen Hao Wang Size Zheng Rui Liao Wenjing Chen Omid Mahian Xiaoke Li College of Materials and Chemistry&Chemical Engineering Chengdu University of TechnologyChengdu 610059China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China College of Resources and Environment Chengdu University of Information TechnologyChengdu 610225China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710061China Department of Chemical Engineering Imperial College LondonLondon SW72AZUK Renewable Energy and Micro/Nano Sciences Lab Department of Mechanical EngineeringFaculty of EngineeringFerdowsi University of MashhadMashhad 91779-48974Iran

Solar-driven hydrogel evaporator used for water purification demonstrates great potential in seawater desalination and domestic sewage ***,much uncertainty still exists about the most efficient design to obtain cost-effective drinkable *** this paper,a natural rich biomass Nicandra physalodes(Linn.)*** was introduced into the polyvinyl alcohol network to control the water distribution during evaporation and build a low-cost hybrid hydrogel solar evaporator with a total material cost of$7.95 m^(−2).The mixed evaporator works stably in a long-span acid–base range(pH 1–14)and salinity range(0–320 g kg^(−1)).Its daily water purification capacity can reach 24.4 kg m^(−2)with a water purification capacity of 3.51 kg m^(−2)h^(−1)under *** paper provides a new possibility for a highly efficient and cost-effective water desalination system with guaranteed water quality by focusing on the dynamic regulation of water molecules at the evaporation interface.

关键词： desalination hydrogels interfacial evaporation polysaccharide solar energy

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Controlling the morphology of 2D Laser-induced Periodic Surface Structures (LIPSS) for Surface-enhanced Raman Spectroscopy applications 19

Controlling the morphology of 2D Laser-induced Periodic Surf...

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Laser-based Micro- and Nanoprocessing XIX 2025

作者： Baskar, Balaji Ahad, Atiqul Islam Berrospe-Rodriguez, Carla Aguilar, Guillermo J. Mike Walker’66 Department of Mechanical Engineering Texas A&M University College Station United States Department of Materials Science & Engineering Texas A&M University College Station United States

ISBN: (纸本)9781510684508

The creation of laser-induced periodic surface structures (LIPSS) with near-submicron dimensions has significantly altered the surface properties of materials, as demonstrated in the past decade. These properties, particularly the hydrophobic characteristics, can be enhanced when combined with the dense nanostructures in LIPSS, making them ideal for highly sensitive surface-enhanced Raman spectroscopy (SERS) applications. However, a key challenge lies in precisely controlling the morphology of these nanostructures and their surface contact properties to effectively concentrate analyte molecules in specific regions for detection at extremely low concentrations. Here we show how single and double femtosecond laser pulse irradiation can be used to achieve different LIPSS morphologies. We generate 1D and 2D periodic nanostructures on 304 stainless steel substrates by adjusting the polarization and inter-pulse delay between fs pulses. From the preliminary experimental results, the dense hotspots in these LIPSS-based sensors allow for the detection of Rhodamine 6G at concentrations as low as 10-10 M, with an analytical enhancement factor of 2 × 107 for consistent and repeatable measurements. These findings provide important insights into the control of laser-induced submicron morphologies by adjusting experimental parameters, offering a straightforward and cost-efficient approach for detecting molecules at ultra-trace levels. © 2025 SPIE.

关键词： Femtosecond lasers

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An intrinsically self-healing and anti-freezing molecular chains induced polyacrylamide-based hydrogel electrolytes for zinc manganese dioxide batteries

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Journal of Energy Chemistry 2024年第2期89卷 565-578,I0013页

作者： Haiyang Liao Wenzhao Zhong Chen Li Jieling Han Xiao Sun Xinhui Xia Ting Li Abolhassan Noori Mir F.Mousavi Xin Liu Yongqi Zhang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina School of Mechanical Engineering Hunan University of TechnologyZhuzhou 412007HunanChina School of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014ZhejiangChina Department of Chemistry Faculty of Basic SciencesTarbiat Modares UniversityTehran 14117-13116Iran State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200HubeiChina

The anti-freezing strategy of hydrogels and their self-healing structure are often contradictory,it is vital to break through the molecular structure to design and construct hydrogels with intrinsic anti-freezing/self-healing for meeting the rapid development of flexible and wearable devices in diverse service ***,we design a new hydrogel electrolyte(AF/SH-Hydrogel)with intrinsic anti-freezing/self-healing capabilities by introducing ethylene glycol molecules,dynamic chemical bonding(disulfide bond),and supramolecular interaction(multi-hydrogen bond)into the polyacrylamide molecular *** to the exceptional freeze resistance(84%capacity retention at-20℃)and intrinsic self-healing capabilities(95%capacity retention after 5 cutting/self-healing cycles),the obtained AF/SH-Hydrogel makes the zinc||manganese dioxide cell an economically feasible battery for the state-of-the-art *** Zn||AF/SH-Hydrogel||MnO_(2)device offers a near-theoretical specific capacity of 285 m A h g^(-1)at 0.1 A g^(-1)(Coulombic efficiency≈100%),as well as good self-healing capability and mechanical flexibility in an ice *** work provides insight that can be utilized to develop multifunctional hydrogel electrolytes for application in next generation of self-healable and freeze-resistance smart aqueous energy storage devices.

关键词： Flexible aqueous battery Hydrogel electrolyte Anti-freezing Self-healing Dual-dynamic reversible bond

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Quasi-Solid-State Na-O2 Battery with Composite Polymer Electrolyte

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ACS Applied materials and Interfaces 2024年第28期16卷 36289-36294页

作者： Iputera, Kevin Tsai, Cheng-Fu Huang, Jheng-Yi Wei, Da-Hua Liu, Ru-Shi Department of Chemistry National Taiwan University Taipei106 Taiwan Department of Mechanical Engineering and Institute of Manufacturing Technology National Taipei University of Technology Taipei106 Taiwan Advanced Research Center For Green Materials Science and Technology Taipei106 Taiwan

Na-O2 batteries have emerged as promising candidates due to their high theoretical energy density (1,601 Wh kg-1), the potential for high energy storage efficiency, and the abundance of sodium in the earth’s crust. Considering the safety issue, quasi-solid-state composite polymer electrolytes are among the promising solid-state electrolyte candidates. Their higher mechanical toughness provides superior resistance to dendritic penetration compared with traditional liquid electrolytes. The flexibility of the composite polymer electrolyte matrix allows it to conform to various battery configurations and considerably reduces safety concerns related to the combustion risks associated with conventional liquid electrolytes. In this study, we employed poly(ethylene oxide) (PEO) and sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) as the polymer matrix and sodium ion-conducting agent, respectively. We incorporated nanosized NZSP (25 wt %) to create the composite polymer electrolyte membrane. This CPE design facilitates ion conduction pathways through both sodium salt and NZSP. By utilizing a liquid electrolyte infiltration method, we successfully enhanced its ionic conductivity, achieving an ionic conductivity of 10-4 S cm-1 at room temperature. © 2024 The Authors. Published by American Chemical Society.

关键词： Sodium

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Tuning surface-active sites of Ru catalysts for the selective deoxygenation of lignin monomers to fuels and chemicals

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science China Chemistry 2025年

作者： Rizky Gilang Kurniawan Jongho Choi Neha Karanwal Seung Min Kim Seok Ki Kim Deepak Verma Jaehoon Kim School of Chemical Engineering Sungkyunkwan University School of Mechanical Engineering Sungkyunkwan University SKKU Advanced Institute of Nanotechnology (SAINT) Sungkyunkwan University Institute of Advanced Composite Materials Korea Institute of Science and Technology Department of Chemical Engineering Ajou University

Cycloalkanes and cyclohexanols find diverse applications, including sustainable aviation fuel, fuel additives, and value-added chemicals. These compounds can be produced via complete or selective hydrodeoxygenation（HDO） of lignin-derived phenolic monomers. In this study, a urea-assisted method was employed to control the size of Ru nanoparticles（NPs） and tune the surfaceactive sites on Ru metal supported on CNx. By adjusting the Ru-to-urea molar ratio, both the size of Ru NPs and the metallic-tooxide ratio of Ru were controlled, along with the incorporation of N atoms into the RuO2surface coordination. In the absence of urea, the Ru/CNx（1:0） catalyst, containing 4.8 nm Ru NPs, achieved complete HDO of 4-propyl guaiacol to n-propyl cyclohexane through ring saturation, followed by hydro-demethoxylation of the C–OCH3group, and hydrogenolysis of the –OH group, with a 97.0% yield at an initial H2pressure of 1.5 MPa, 200 °C, and 20 h in water. The final hydrogenolysis step was inhibited over the urea-assisted catalysts. The Ru/CNx（1:8） catalyst, containing 3.1 nm Ru NPs, achieved a maximum selectivity of 67.6% for n-propyl cyclohexanol, along with complete conversion of 4-propyl guaiacol. Similar trends were observed in the product distribution when upgrading reductive catalytic fractionation bio-oil over Ru/CNx（1:0） and Ru/CNx（1:8）.

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A novel D0_(22)-strengthened medium entropy alloy with outstanding strength-ductility synergies over ambient and intermediate temperatures

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Journal of materials science & Technology 2024年第35期202卷 152-164页

作者： Jie Gan Jinxiong Hou Tzuhsiu Chou Xier Luo Jiang Ju Junhua Luan Guoqiang Huang Bo Xiao Jixun Zhang Jianyang Zhang Yakun Tao Junheng Gao Tao Yang Department of Materials Science and Engineering City University of Hong KongHong KongChina Hong Kong Branch of National Precious Metals Material Engineering Research Centre(NPMM) City University of Hong KongHong KongChina Department of Mechanical Engineering City University of Hong KongHong KongChina National Center for International Research on Deep Earth Drilling and Resource Development Faculty of EngineeringChina University of Geosciences(Wuhan)Wuhan 430074China Research Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China Liaoning Academy of Materials Shenyang 110000China City University of Hong Kong Shenzhen Research Institute Shenzhen 518057China

Precipitation-strengthened medium/high-entropy alloys(MEAs/HEAs)have great potential for high-temperature *** this study,we designed a novel Ni_(45.9)Fe_(23)Cr_(23)V_(4)Nb_(3)Mo_(1)B_(0.1)(at.%)MEA alloy,hardened by the D0_(22)(Ni,Fe,Cr)_(3)(Nb,V)-type nanoprecipitates,with an excellent strength-ductility com-bination from room to elevated ***,the tensile strengths,at 700 and 800℃,could be maintained as high as 845 and 589 MPa,respectively;meanwhile,elongations at all testing temper-atures exceeded 25%without any intermediate-temperature *** temperature-dependent deformation mechanisms were unraveled using multi-scale characterizations,which involved profound slip planarities,such as stacking fault(SF)networks and deformation twins(DTs).Furthermore,the crit-ical resolved shear stress(CRSS)to initiate SFs in both face-centered cubic(FCC)and D0_(22)phases was evaluated,and the possible reasons for the origin of anomalous DTs at 800℃were discussed in *** main findings demonstrate that the shearable D0_(22)nanoparticles can provide the FCC matrix with considerable dislocation storage capacity,reinforcing strain hardening at ambient and intermedi-ate *** work provides fundamental insights into the controllable design and deformation mechanisms of high-performance D0_(22)-strengthened MEAs/HEAs.

关键词： Precipitation strengthening Medium-entropy alloys D0_(22)phase Intermediate-temperature embrittlement High-temperature deformation

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Origin of superior low-cycle fatigue resistance of an interstitial metastable high-entropy alloy

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Journal of materials science & Technology 2022年第20期115卷 115-128页

作者： Seyed Amir Arsalan Shams Jae Wung Bae Jae Nam Kim Hyoung Seop Kim Taekyung Lee Chong Soo Lee Graduate Institute of Ferrous Technology Pohang University of Science and TechnologyPohang 37673Republic of Korea Department of Materials Science and Engineering Pohang University of Science and TechnologyPohang 37673Republic of Korea School of Mechanical Engineering Pusan National UniversityBusan 46241Republic of Korea

In this study, the deformation behaviors and related microstructural evolutions were investigated in either monotonic or cyclic deformation modes in an interstitial metastable high-entropy alloy. These investigations aimed to reveal the mechanisms underlying the superior low-cycle fatigue(LCF) life of this alloy.A thermomechanical process was applied to induce fine-grained(FG) and coarse-grained(CG) microstructures in Fe–30Mn–10Co–10Cr–0.4C(atomic percentage) alloy. Their superior combination of strength and ductility was attributed to the appearance of deformation-induced ε-martensite and the presence of carbon. The CG alloy showed a greater volume fraction of ε-martensite than the FG alloy in the monotonic deformation mode, and vice versa in the cyclic mode. Such a disparity was interpreted in light of the back-stress effect of the relaxed γ-grain boundaries in the latter mode. Meanwhile, the γ-to-ε phase transformation under cyclic loading at low strain amplitudes(0.4%) barely led to an improved fatigue life as compared with that at higher strain amplitudes(≥ 0.55%). The high reversibility of partial dislocation motions under cyclic loading and delaying the formation of dislocation cells through the martensitic transformation could explain why the alloys investigated in this study exhibited a superior LCF life compared with high-entropy alloys reported in previous studies.

关键词： High-entropy alloy Transformation-induced plasticity Monotonic deformation Cyclic deformation Low-cycle fatigue Stacking faults

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Microwave-assisted synthesis of silver nanoparticles using extract of unbaked cilembu sweet potato 13

Microwave-assisted synthesis of silver nanoparticles using e...

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13th International Physics Seminar 2024, IPS 2024

作者： Aliwarga, Bryan S Muhammad, Khalid Asri, Lia A T W Wibowo, Arie Department of Materials Engineering Faculty of Mechanical An Aerospace Engineering Institut Teknologi Bandung West Java Bandung40132 Indonesia Materials Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung West Java Bandung40132 Indonesia Research Center for Nanoscience and Nanotechnology Institut Teknologi Bandung West Java Bandung40132 Indonesia

Silver nanoparticle (AgNP) is one of attractive nanomaterials for biomedical applications, such as electroactive scaffold, antimicrobial treatment, anticancer therapy, and wound healing. Previously, AgNP was successfully synthesized using extract of Cilembu sweet potato (CSP) only if the extract was baked in oven at 120 °C for 60 minutes, which is an energy-intensive and time-consuming process. In this study, AgNPs was fabricated using unbaked extract of CSP with employing fast microwave heating instead of baking process. Microwave irradiation time were varied (0, 30, 60 and 90 seconds) to know the influence of microwave irradiation time on particles size and morphology of the obtained AgNPs. The obtained samples were evaluated using UV-Visible spectroscopy, dynamic light scattering and transmission electron microscopy to know the surface plasmon resonance characteristic, average particles size and morphologies of the obtained AgNPs respectively. © Published under licence by IOP Publishing Ltd.

关键词： Silver nanoparticles

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Microwave synthesis of high-entropy alloy catalysts on graphene oxide sheets for oxygen reduction and evolution reactions

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International Journal of Hydrogen Energy 2024年 53卷 999-1008页

作者： Khan, Jala Bib Panda, Pradeep Kumar Yang, Po-Chih Hsieh, Chien-Te Gandomi, Yasser Ashraf Liu, Wei-Ren Chang, Jeng-Kuei Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan 32003 Taiwan Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee Knoxville 37996 TN United States Department of Chemical Engineering Massachusetts Institute of Technology Cambridge 02142 MA United States Department of Chemical Engineering R&D Center for Membrane Technology Center for Circular Economy Chung Yuan Christian University Taoyuan 32023 Taiwan Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan

High-entropy alloys (HEAs) are commonly synthesized through solid-state reactions and solution-mediated techniques. In this work, HEA nanoparticles were synthesized using an ultra-efficient pulse microwave (PM) method at relatively low temperatures (∼100 °C) with superior catalytic activities. During the PM synthesis process, the precursors of the reaction activate and accelerate the reaction owing to the release of localized and excessive energy. This leads to the formation of a crystallized high-entropy alloy (HEA). Pt₃₀Al₁₅Mn₁₅Co₁₀Ni₁₅Cu₁₅ and Pt₃₀Al₁₅Mn₁₅Co₁₀Ni₁₅Fe₁₅ HEA nanoparticles were synthesized without requiring additional external heat treatments. Furthermore, the synthesized entropically stable HEA nanoparticles showed excellent dispersion behavior towards graphene oxide (GO) sheets (particle size: 4–10 nm), this enhanced dispersion resulted in improved catalytic activity and long-term durability for various processes including H₂ adsorption/desorption, oxygen reduction reaction (ORR), and oxygen evolution reaction (OER). The robust design of Cu-HEA-GO catalytic nanoparticles leads to increased synergistic interactions, which play a critical role in enhancing the ORR/OER activity. We firmly believe that the framework established in this study paves the way for the development of various high-performance catalysts based on HEAs for applications in fuel cells, metal-air batteries, and other electrochemical devices. © 2023 Hydrogen Energy Publications LLC

关键词： Electrochemical catalysts Graphene oxide High entropy alloy Oxygen reduction reaction Pulse microwave approach

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Potentials of direct air capture (DAC) of CO2in a dedicated outside air system (DOAS)

Potentials of direct air capture (DAC) of CO2in a dedicated ...

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2023 ASHRAE Annual Conference

作者： Choi, Youngsik O Neill, Zheng Yang, Shu Department of Mechanical Engineering Texas AandM University College StationTX United States Department of Materials Science and Engineering The University of Pennsylvania PhiladelphiaPA United States

ISBN: (纸本)9781955516648

Direct air capture (DAC) has been explored mostly at centralized and dedicated capture facility. This ongoing work is focusing on investigating potentials of DAC coupled with heating, ventilation, and air-condition (HVAC) system in buildings in a more distributed way. A preliminary simulation-based case study of a desiccant-Assisted dedicated outdoor air system (DOAS) with a DAC is conducted in six locations in the U.S. Results show that the CO2 capturing potential and the DAC regeneration energy at the humid locations are relatively larger. © 2023 A SHRAE.

关键词： Driers (materials)

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