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Fabrication of nickel nanoparticles anchored on a 2D double transition metal MXene for efficient hydrogen and oxygen evolution reactions

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International Journal of Hydrogen Energy 2025年 141卷 762-772页

作者： Murugan, Nagaraj Thangarasu, Sadhasivam Venkatachalam, Priyadarshini Bhosale, Mrunal Kang, Min Yu, Minseo Oh, Tae Hwan Kim, Yoong Ahm Department of Polymer Engineering and Graduate School School of Polymer Science and Engineering Chonnam National University 77 Yongbong-ro Buk-gu Gwangju61186 Korea Republic of School of Chemical Engineering Yeungnam University Gyeongsan38541 Korea Republic of

Creating cost-effective and high-performing bifunctional electrocatalysts is a viable alternative to expensive noble metal electrocatalysts for water-splitting applications. A double transition metal MXene (Mo2TiC2Tx) has recently shown exceptional electrocatalytic activity because of its high conductivity, hydrophilicity, mechanical stability, electron mobility, and rich surface chemistry. In this study, we have created efficient bifunctional electrocatalytic properties of nano Ni decorated Mo2TiC2Tx MXene (Ni–Mo2TiC2Tx). The efficient and homogeneous incorporation of Ni on the 2D Mo2TiC2Tx surface and between the layers demonstrates remarkable electrocatalytic efficiency for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Among the different combinations, the 15 mmol Ni–Mo2TiC2Tx showed lower overpotential for the HER (ƞ10 = 153.9 mV) and OER (ƞ10 = 200.5 mV). Moreover, the Ni–Mo2TiC2Tx based electrocatalysts exhibit satisfactory electrochemical stability up to 5000 cycles. During the HER and OER process, Ni and Mo cations form a new oxy-hydroxide layer on the surface in the OH− environment indicating a faster surface self-reconstruction process of the surface structure and Ni/Mo oxy-hydroxide layer interacts with O and H atoms of adsorbed water and thus leading to superior HER and OER activity. This study introduces a straightforward and effective approach to creating a new category of MXene heterostructures, which significantly boosts the performance and durability of catalysts for the HER and the OER showing promise for future applications. © 2024 Hydrogen Energy Publications LLC

关键词： Surface chemistry

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Sustainable bio-energy generation via the conversion of spent wash using dual chamber microbial fuel cell

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Waste Disposal and Sustainable Energy 2024年第2期6卷 219-231页

作者： Abdul Sattar Jatoi Jawad Ahmed Afaque Ahmed Bhutto Muhammad Shuaib Shaikh Department of Chemical Engineering Dawood University of Engineering and Technology KarachiSindhPakistan Changzhou DUBO Polymer Co. Ltd.Changzhou 213002China Department of Basic Science and Related Studies The University of LarkanoSindhPakistan Department of Chemical Engineering Mehran University of Engineering and Technology JamshoroSindhPakistan

Microbial fuel cells(MFCs)are innovative devices that combine microbial processes with electrochemical reactions to convert organic matter in wastewater into electricity while simultaneously treating the *** such application is the treatment of spent wash,a highly polluting effluent generated from the distillery industry after crude mesh is separated into ethanol and spent *** wash,also known as distillery effluent or stillage,is a highly challenging wastewater treatment method due to its high chemical oxygen demand(COD),biological oxygen demand(BOD),and total dissolved solids(TDS).These characteristics make it a complex and polluting industrial effluent that requires specialized treatment processes to reduce its environmental impact ***,MFCs have shown promise in treating spent wash,as they can utilize the organic matter in wastewater as a fuel source for microbial growth as well as for electricity *** the treatment of spent wash,Saccharomyces cerevisiae *** used as a biocatalyst along with 340 mol/L potassium ferricyanide in the cathode chamber and 170 mol/L methylene blue in the anode as a *** tests were conducted by balancing a one-liter volume for power production from spent wash in MFC with the optimal conditions of 10%agarose,pH 8.5,300 mL/min of aeration in the cathode chamber,and 40%(in weight)substrate *** an ideal concentration,the maximum current and power density are roughly 53.41 mA/m^(2)and 72.22 mW/m^(2),*** each litre of processed spent wash,a maximum voltage of 850 mV(4.5 mA)was ***,91%of COD and BOD were removed from the effluent *** findings show that MFCs are capable of producing electricity and efficiently removing COD from wasted wash at the same time.

关键词： Microbial fuel cell chemical oxygen demand Biological oxygen demand-Current density Power density Spent wash

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Improving Thermal-oxidative Aging Resistance of Styrene-butadiene Rubber by Antioxidant Loaded Silica Aerogel

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Chinese Journal of polymer science 2024年第8期42卷 1198-1209页

作者： Xue-Fei Ping Yu Wang Lu Liu Fu-Yong Liu Hong-Wei He Pi Wang Wen-Wen Yu Qiang Zheng College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032China Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310058China

The antioxidant N-isopropyl-N'-phenyl-p-phenylenediamine(4010NA)was dissolved in ethanol and impregnated into silica aerogel(SAG)via vacuum-pressure cycles,yielding composite particles(A-N)with enhanced sustained-release and reinforcing *** effect of A-N on the mechanical properties and thermal-oxidative aging resistance of styrene-butadiene rubber(SBR)vulcanizates was *** and BET assessments indicated that the loading efficiency of 4010NA in SAG reached 14.26%within ethanol's solu bility *** A-N into SBR vulcanizates significantly elevated tensile strength by 17.5%and elongation at break by 41.9%over those with fumed silica and ***,A-N notably enhanced the thermal-oxidative aging resistance of *** aging for 96 h at 100℃,the tensile strength and elongation at break of SBR with A-N sustained 70.09%and 58.61%of their initial values,respectively,with the retention rate of elongation at break being 62.8%higher than that of SBR with fumed silica and free *** study revealed that A-N composite particles significantly inhibited the crosslinking in SBR's molecular chains,reducing hardening and embrittlement during later thermal-oxidative aging stages.

关键词： Styrene-butadiene rubber Silica aerogel Loading modification Thermal-oxidative aging

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Interface-reinforced high-capacity fiber cathode for wearable Li–S batteries

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National science Review 2024年第10期11卷 53-62页

作者： Lei Huang Tianzhu Zhou Siyu Zhu Tianqi Yang Xuhui Zhou Bing He Shuai Wang Wei Yan Lei Wei School of Electrical and Electronic Engineering Nanyang Technological University School of Materials Science and Engineering Nanyang Technological University Department of Physics City University of Hong Kong State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University

Fiber-shaped Li–S batteries are attractive for constructing smart textiles as flexible power solutions due to their high theoretical specific capacity, flexibility and wearability. However, severe interfacial issues, such as the shuttle effect of polysulfides on the cathode side, lead to capacity decay and poor lifespan of the ***, we report a fiber-shaped composite cathode with collaborative interface interactions to maintain electrode integrity and boost electrochemical performance. In this architecture,nanosulfur-polyvinylpyrrolidone（nano S-PVP） particles are uniformly implanted into the few-layer Ti3C2Txwith outstanding electrical conductivity and then coated on aluminum（Al） fiber current collectors. Impressively, nano S and soluble polysulfides are restricted to the cathode side via synergy physical confinement and chemical adsorption of Ti3C2Tx. The PVP chains on the surface of the nano S prevent the sulfur from agglomeration and bridge the Ti3C2Txby abundant hydrogen bonds. The enhanced interface endows the cathode with excellent mechanical flexibility, good adsorption of polysulfides and fast reaction kinetics. Consequently, the prepared Ti3C2Tx/nano S-PVP@Al cathode exhibits excellent cycling performance（capacity retention of 92.8% after 1000 cycles at 1 C）, high-rate capacity(556.2 m Ah g-1at 2.0 C) and high linear capacity(22.9 m Ah m-1). Additionally, the fiber-shaped Li–S battery works effectively under deformation and high/low-temperature conditions. It can be integrated into the fabric to power light emitting diodes or charge a smartphone wirelessly.

关键词： Li–S batteries flexible electrodes interface interactions fiber-shaped devices energy storage

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Constructing diverse switchable circularly polarized luminescence via a single azobenzene polymer film

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Chinese chemical Letters 2025年第1期36卷 299-305页

作者： Xiang Wang Qingping Song Zixiang He Gong Zhang Tengfei Miao Xiaoxiao Cheng Wei Zhang State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Department of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China School of Chemical and Environmental Engineering Anhui Polytechnic UniversityWuhu 241000China Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials School of Chemistry and Chemical EngineeringHuaiyin Normal UniversityHuaian 223300China

Recently circularly polarized luminescence(CPL)materials have attracted significant *** reversible dynamic property to these materials has been a key focus in cutting-edge fields,such as in high-level information ***,we provided a novel and general strategy involving handednessselective filtration and ground-state chiral self-recovery(CSR)in double film system to address this *** on this strategy,we achieved CPL switch through the reversible modulation of ground-state chirality including absorption and scattering circular dichroism(CD)signals over the full UV-visible wavelength range(365-700 nm)in a single azobenzene polymer(PAzo)*** importantly,by flexibly changing the type of fluorescent films,it is convenient to achieve general excited-state CSR,that is reversible switching of full-color including ideal white(CIE coordinate(0.33,0.33)),as well as room-temperature phosphorescent *** these CPL signals without almost any intensity decay after three cycles of onand-off *** results indicated that the trans-cis isomerization and ordered rearrangement of azobenzene units in PAzo film were the fundamental reasons for realizing CPL ***,based on this system we achieved dynamic visual encryption and decryption process including multiple decryption *** study provides an effective method for constructing a universally applicable chiroptical switch in excited state.

关键词： Circularly polarized luminescence Azobenzene polymer Multiple CPL Chiral switch Information encryption

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engineering stable multi-component pH responsive nanomedicine for enhanced photothermal/photodynamic therapy

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Chinese Journal of chemical engineering 2025年 81卷 32-44页

作者： Zheng, Zhiyuan Wu, Yue Chen, Yuan Sun, Xinyue Kayitmazer, Ayşe Başak Ahmad, Ayyaz Ramzan, Naveed Rafique, Muhammad Shahid Zhou, Xiaolong Xu, Yisheng State-Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai200237 China Department of Chemistry Bogazici University Istanbul Turkey Department of Chemical Engineering Muhammad Nawaz Sharif University of Engineering and Technology Multan Pakistan Faculty of Chemical Metallurgical and Polymer Engineering University of Engineering and Technology Lahore Pakistan Department of Physics University of Engineering and Technology Lahore Pakistan International Joint Research Center of Green Energy Chemical Engineering East China University of Science and Technology Shanghai200237 China

Integrating multiple modalities of cancer therapies for synergistic and enhanced therapeutic efficacy remains challenging. Herein, flash nanoprecipitation (FNP), a kinetically driven process, was employed to expedite the coordination reaction time required for nano-encapsulate components with completely opposite physiochemical properties including sorafenib (SRF), hemoglobin (Hb), chlorin e6 (Ce6), and indocyanine green (ICG) into a multi-component HSCI nanomedicine. Hydrophilic components Hb and ICG interact to form hydrophobic ICG-Hb complexes under electrostatic and hydrophobic interactions. This process facilitates the characteristic time of nucleation (τnucleation) to match the characteristic mixing time (τmix) of the FNP process, resulting in the formulation of kinetically stable nanomedicine, overcoming the long equilibrium times and instability issues associated with thermodynamic assembly. Importantly, pH-responsive structure is also easily but effectively integrated in nanomedicine during this kinetically driven formulation to manipulate its structures. In the acidic tumor microenvironment (TME), the pH-stimulated morphology transformation of HSCI nanomedicine boosts its reactive oxygen species (ROS) generation efficiency and photothermal efficacy, endowing it with better antitumor suppression. In vitro and in vivo experiments reveal that the HSCI nanomedicine offers a synergistic therapeutic effect and stronger tumor suppression compared with single therapies. These results open a new window for developing strategies for multimodal combinatory cancer therapies. © 2025 The chemical Industry and engineering Society of China, and chemical Industry Press Co., Ltd.

关键词： chemical industry

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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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Furan-modified thiadiazolo quinoxaline as an electron acceptor for constructing second near-infrared aggregation-induced emission fluorophores for beyond 1300 nm fluorescence/photoacoustic imaging and photothermal therapy

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Aggregate 2024年第2期5卷 345-356页

作者： Mengke Liang Luyu Liu Ying Sun Jia Li Ling’e Zhang Xiqun Jiang Wei Wu Department of Polymer Science&Engineering State Key Laboratory of Analytical Chemistry for Life ScienceCollege of Chemistry&Chemical EngineeringNanjing UniversityNanjingP.R.China

Creation of new fluorophores is important for understanding the structure-property relationship,by which the required optical properties are likely to be ***,through theory calculation,it is found that furan-modified thiadiazolo quinoxaline acting as an electron acceptor can endow donor-acceptor-donor(D-A-D)type second near-infrared(NIR-Ⅱ)fluorophores with longer emission wavelength than the other thiadiazolo quinoxaline-based acceptors containing pyridine,pyrrole,thiophene,and phenyl groups,*** the basis of this theoretical prediction,a D-A-D type NIR-Ⅱ fluorophore with 6,7-di(furan-2-yl)-[1,2,5]thiadiazolo[3,4-g]quinoxaline(DFTQ)as the acceptor and dithieno[3,2-b:2′,3′-d]pyrrole(DTP)as the donor is designed and synthesized,and the aggregation-induced emission(AIE)function is further achieved by introducing the AIE units of tetraphenylethylene(TPE)and triphenylamine(TPA),respectively,totally forming three NIR-Ⅱ fluorophores DFTQ-DTP,DFTQ-DTPE,and *** biological applications,the fluorophores are encapsulated by amphiphilic DSPE-PEG2000 to generate water-dispersible nanoparticles(NPs).Almost the whole emission of each of the NPs falls into the NIR-Ⅱ spectral range,with part emission beyond 1300 *** using DFTQ-DTPA NPs as the contrast and photothermal therapy(PTT)agent,high-resolution in vivo fluorescence imaging is achieved in the greater than 1300 nm window,and their good performance in photoacoustic imaging and high tumor PTT efficacy in tumor-bearing mice are also *** together,this work mainly provides a strong electron acceptor for constructing longemitting fluorophores,and by using the electron acceptor,a AIE fluorophore with desirable quantum yield(QY)and photothermal conversion efficienciy(PCE)is synthesized and demonstrated to be promising in fluorescence/photoacoustic imaging and PTT.

关键词： aggregation-induced emission fluorescence imaging photoacoustic imaging photothermal therapy second near-infrared fluorophores

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Dynamics of Charged Ring polymers under Gel Confinement

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Chinese Journal of polymer science 2025年第3期43卷 399-405页

作者： Lu-Jie Huo Kai-Ru Qu Zhen-Zhong Yang Di Jia State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Institute of Polymer Science and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Ring polymers are ubiquitous in various fields including biomaterials,drug release and gene *** of these applications involve the dynamics and diffusion process of ring polymers in a confined *** using dynamic light scattering(DLS),we discovered a dynamical transition for charged ring polymers with increasing ring concentration in the gel matrix from a diffusive state to a non-diffusive topological frustrated state with a more compact *** the ring polymer size is smaller than the mesh size of the gel matrix,the rings are diffusive at low concentration of 5 g/*** ring diffusion coefficient in the gel matrix is an order of magnitude smaller than that of rings in solution,obeying the Ogston's *** high ring concentration of 40 g/L,the collective dynamical behavior of the charged rings exhibits a topologically frustrated non-diffusive state,which may originate from the inter-ring threading with the external confinement from the gel *** on our previous theoretical work,we also conjectured that in such a non-diffusive state,the ring polymers might adopt a more compact conformation with the overall size exponentν=1/3.

关键词： Charged ring polymer Dynamics under confinement Non-diffusive topologically frustrated dynamics Dynamic light scattering Collective diffusion coefficient

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Understanding the Thermal Impedance of Silicone Rubber/Hexagonal Boron Nitride Composites as Thermal Interface Materials

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Chinese Journal of polymer science 2024年第3期42卷 352-363,I0008页

作者： Yuan Ji Shi-Da Han Hong Wu Shao-Yun Guo Feng-Shun Zhang Jian-Hui Qiu The State Key Laboratory of Polymer Materials Engineering Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing TechnologyPolymer Research InstituteSichuan UniversityChengdu 610065China Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621900China Department of Mechanical Engineering Faculty of Systems Science and TechnologyAkita Prefectural UniversityAkita 015-0055Japan

Silicone rubber(SR) composites are most widely used as thermal interface materials(TIMs) for electronics heat dissipation. Thermal impedance as the main bottleneck limiting the performance of TIMs is usually neglected. Herein, the thermal impedance of SR composites loaded with different levels of hexagonal boron nitride(h-BN) as TIMs was elaborated for the first time by the ASTM D 5470 standard test and finite element analysis. It was found that elastic modulus and surface roughness of SR composites increased with the increase of h-BN content, indicating that the conformity was reduced. When the assembly pressure was 0.69 MPa, there existed an optimal h-BN content at which the contact resistance was minimum(0.39 K·cm^(2)·W^(-1)). Although the decreased bond line thickness(BLT) by increasing the assembly pressure was beneficial to reduce the thermal impedance, the proper assembly pressure should be selected to prevent the warpage of the contact surfaces and the increase in contact resistance, according to the compression properties of the SR composites. This study provides valuable insights into fabrication of high-performance TIMs for modern electronic device applications.

关键词： Thermal interface materials Hexagonal boron nitride Thermal impedance Surfaces

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