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Unveiling the origin of performance enhancement of photovoltaic devices by upconversion nanoparticles

Journal of Energy Chemistry 2022年第2期31卷 524-531页

作者： Huanhuan Yao Guoqiang Peng Zhizai Li Ge Zhu Wenquan Li Zhipeng Ci Wei Lan Hao Jia Bin Dong Zhiwen Jin School of Physical Science and Technology&National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology Lanzhou UniversityLanzhou 730000GansuChina Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission Key Laboratory of Photosensitive Materials&Devices of Liaoning ProvinceCollege of Physics and Materials EngineeringDalian Minzu UniversityDalian 116600LiaoningChina School of Physics and Electronic Information Engineering Qinghai Normal UniversityXining 810008QinghaiChina

To better utilize the infrared(IR)region in sunlight for photovoltaic devices(PVs),upconversion nanoparticles(UCNPs)have been proposed to improve power conversion efficiency(PCE).However,researchers recently have found that the upconversion(UC)effect is negligible in PVs performance improvement for their ultra-low UC photoluminescence quantum yields of UCNPs solid film,while the real mechanism of UCNPs in PVs has not been clearly ***,based on the material inorganic perovskitesγ-CsPbI_(3),NaYF_(4):20%Yb^(3+),2%Er^(3+)UCNPs were integrated into different transport layer to optimize device *** with reference device,the short-circuit current density and PCE of optimized device reached 20.87 mA/cm^(2)(20.39 mA/cm^(2))and 18.34%(17.72%),respectively,without sacrificing open-circuit voltage and filling *** experimental characterizations verified that the improved performance was attributable to enhanced visible light absorption instead of *** theoretically explain the statement,the light field distribution in device was simulated and the absorption in different layers was *** results revealed that the introduction of UCNPs with different refractive index from other layers caused light field disturbance,and improved visible light captured by γ-CsPbI_(3).Importantly,through experiments and theoretical calculation,the research deeply explored the potential mechanism of UCNPs in optimizing PVs performance.

关键词： Upconversion nanoparticles light field disturbance Simulation Photovoltaic device γ-CsPbI_(3)

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Structural identification and antioxidative activity evaluation of flaxseed lignan macromolecules: structure-activity correlation

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Food Science and Human Wellness 2024年第6期13卷 3224-3235页

作者： Chen Cheng Lei Wang Xiao Yu Fenghong Huang Jing Yang Fang Geng Xiaoyang Xia Xia Xiang Shufang Xu Qianchun Deng Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences Oil Crops and Lipids Process Technology National&Local Joint Engineering LaboratoryHubei Key Laboratory of Lipid Chemistry and Nutritionand Key Laboratory of Oilseeds ProcessingMinistry of Agriculture and Rural AffairsWuhan 430062China College of Food and Bioengineering Zhengzhou University of Light IndustryZhengzhou 450002China Key Laboratory of Coarse Cereal Processing(Ministry of Agriculture and Rural Affairs) School of Food and Biological EngineeringChengdu UniversityChengdu 610106China Clinical Nutrition Department the Central Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014China

Flaxseed lignan macromolecules(FLM)are a class of important secondary metabolites in fl axseed,which have been widely concerned due to their biological and pharmacological properties,especially for their antioxidative *** the composition and structure of FLM,our results confirmed that ferulic acid glycoside(FerAG)was directly ester-linked with herbacetin diglucoside(HDG)or pinoresinol diglucoside(PDG),which might determine the beginning of FLM ***,p-coumaric acid glycoside(CouAG)might determine the end of chain extension during FLM synthesis in fl *** exhibited higher antioxidative activity in polar systems,as shown by its superior 1,1-diphenyl-2-picrylhydrazyl(DPPH)free radical scavenging capacity compared to the 2,2’-azinobis(3-ehtylbenzothiazolin-6-sulfnic acid)(ABTS)cation free radical scavenging capacity in non-polar ***,the antioxidative activity of FLM was found to be highly dependent on its composition and *** particular,it was positively correlated with the number of phenolic hydroxyl groups(longer FLM chains)and inversely related to the steric hindrance at the ends(lower levels of FerAG and CouAG).These fi ndings verifi ed the potential application of FLM in nonpolar systems,particularly in functional food emulsions。

关键词： Flaxseed lignan macromolecules Composition structure Antioxidative activity Structure-activity Correlation Flaxseed lignan macromolecules Composition structure Antioxidative activity Structure-activity Correlation

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Regulating electronic structure of two-dimensional porous Ni/Ni_(3)N nanosheets architecture by Co atomic incorporation boosts alkaline water splitting

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InfoMat 2022年第6期4卷 141-152页

作者： Kaixi Wang Yingying Guo Zhonghui Chen Donghai Wu Shouren Zhang Baocheng Yang Jianan Zhang Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhouChina Key Lab for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-efficiency Display and Lighting TechnologySchool of Materials Science and EngineeringHenan UniversityKaifengChina College of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina

Interfacial engineering is a powerful method to improve the bifunctional electrocatalytic performance of pure phase *** it is expected to further optimize the electronic configuration of heterojunctions to boost the reaction kinetics in hydrogen/oxygen evolution reaction(HER/OER),but remains a ***,a novel in situ hybrid heterojunction strategy is developed to construct 2D porous Co-doped Ni/Ni_(3)N heterostructure nanosheets(Co-Ni/Ni_(3)N)by pyrolysis of partially cobalt substituted nickel-zeolitic imidazolate framework(CoNi-ZIF)nanosheets under NH3 atmosphere.A combined experimental and theoretical studies manifest that the hybrid heterostructures can display regulative electronic states and downshift d-band center from the Fermi level,as well as optimize the adsorption energy of reaction intermediates,thus reducing the thermodynamic energy barriers and accelerating the catalytic ***,benefitting from the optimized electronic configuration,hierarchical hollow nanosheets architecture,and abundant doped heterojunctions,the hybrid Co-Ni/Ni_(3)N heterostructure catalyst exhibits efficient catalytic activity for both HER(60 mV)and OER(322 mV)at 10 mA cm^(-2)in alkaline media,which is 105 and 47 mV lower than that of pure Ni_(3)N,*** electrochemically active surface area of Co-Ni/Ni_(3)N is two times higher than that of ***,the coupled practical water electrolyzer requires a low voltage of 1.575 V to reach 10 mA cm^(-2),and it can be driven by a 1.5 V *** work highlights the interface engineering guidance for the rational establishment of hybrid interfaces by electronic modulation of interfacial effect for alkaline water splitting.

关键词： 2D porous nanosheet hybrid heterojunction interfacial engineering nickel nitride overall water splitting

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Surface Ligand Evolution:Sulfur-Directed Covalent Bonding of PPh_(3) on Pd_(4)S with Improved Semi-hydrogenation of Terminal Alkynes

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Precision Chemistry 2024年第5期2卷 200-207页

作者： Wentong Jing Shiguang Mo Weijie Zhang Wenting Zhou Kunlong Liu Jie Wei Ruixuan Qin Nanfeng Zheng New Cornerstone Science Laboratory State Key Laboratory for Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy Materialsand National&Local Joint Engineering Research Center of Preparation Technology of NanomaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China China Resources Cement Technology R&D(Guangxi)Co Ltd. Nanning 530008China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China

Surface modification of metallic nanocatalysts with organic ligands has emerged as an effective strategy to enhance catalytic selectivity,although offten at the expense of catalytic *** this study,we demonstrate a compelling approach by surface modifying Pd2S nanocrystals with PPhz ligands,resulting in a catalyst with excellent catalytic activity and durable selectivity for the semi-hydrogenation of terminal *** and theoretical investigations reveal that the presence of S sites on the Pd surface directs PPh_(3) ligands to preferentially form covalent bonds with S,creating distinctive surface S=PPh_(3) *** configuration induces a partial positive charge on Pd,facilitating hydrogen transfer and thus promoting catalytic ***,the covalent bond between the ligand and catalyst surface forms a robust network,ensuring ligand stability and increasing the hydrogenation energy barrier of ***,the Pd_(4)S@PPhz catalyst exhibits an improved catalytic selectivity with durability in terminal alkyne *** study introduces an effective strategy for designing selective hydrogenation catalysts with an enhanced performance.

关键词： Pd nanocatalysts surface modification selective hydrogenation catalytic stability alkyne semi-hydrogenation

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Transition metal-based cathode catalysts for Li-CO_(2)batteries

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Journal of Energy Chemistry 2025年第5期104卷 225-253页

作者： Wenqing Ma Mingjuan Gao Jianping Ma Siyu Liu Lishan Yang Yahui Yang Xiangping Chen Tianzhen Jian Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022ShandongChina Key Laboratory of Chemical Biology&Traditional Chinese Medicine Research(Ministry of Education of China) National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of ResourcesKey Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceKey Laboratory of Light Energy Conversion Materials of Hunan Province CollegeHunan Normal UniversityChangsha 410081HunanChina Nano-Science Center&Department of Chemistry University of CopenhagenCopenhagen 2100Denmark Jinan Preschool Education College Jinan 250307ShandongChina State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongChina Shandong Sacred Sun Power Sources Co.Ltd. Qufu 273100ShandongChina

The Li-CO_(2)battery has been highly rated as an intriguing technique for balancing the carbon cycle for years,but it is still significantly challenged by the obstacles such as limited reversibility,sluggish kinetics,and poor energy ***,the design and development of advance catalysts that can enhance the kinetics and reversibility of the CO_(2)electrochemical cycling reactions are considered the imperative *** metal-based catalysts are widely considered appealing owing to their unfilled dorbitals,rich and adjustable valences,as well as *** this review,the working mechanism and the key issues of the CO_(2)electrochemical cycling reaction are discussed *** the strategies for composition and structure design of different type of transition metal-based catalysts are highlighted,including their benefits,limitations,and the ways to implement these ***,based on the pioneering research,the perspectives on the challenges and key points for the future development of cathode catalyst are proposed.

关键词： Li-CO_(2)battery Transition metal Cathode catalyst Catalytic mechanism

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Unraveling the efficiency losses and improving methods in quantum dot-based infrared up-conversion photodetectors

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Opto-Electronic Science 2024年第4期3卷 1-11页

作者： Jiao Jiao Liu Xinxin Yang Qiulei Xu Ruiguang Chang Zhenghui Wu Huaibin Shen Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Centre for High-efficiency Display and Lighting TechnologySchool of MaterialsHenan UniversityKaifeng 475004China

Quantum dot-based up-conversion photodetector,in which an infrared photodiode(PD)and a quantum dot light-emitting diode(QLED)are back-to-back connected,is a promising candidate for low-cost infrared ***,the huge efficiency losses caused by integrating the PD and QLED together hasn’t been studied *** work revealed at least three origins for the efficiency ***,the PD unit and QLED unit usually didn’t work under optimal conditions at the same ***,the potential barriers and traps at the interconnection between PD and QLED units induced unfavorable carrier ***,much emitted visible light was lost due to the strong visible absorption in the PD *** on the understandings on the loss mechanisms,the infrared up-conversion photodetectors were optimized and achieved a breakthrough photon-to-photon conversion efficiency of 6.9%.This study provided valuable guidance on how to optimize the way of integration for up-conversion photodetectors.

关键词： infrared colloidal quantum dots up-conversion photodetector integration loss interconnection voltage allocation

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Regulating the Deposition of Insoluble Sulfur Species for Room Temperature Sodium-Sulfur Batteries

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Chemical Research in Chinese Universities 2022年第1期38卷 128-135页

作者： WANG Chaozhi CUI Jingqin FANG Xiaoliang ZHENG Nanfeng Pen-Tung Sah Institute of Micro-Nano Science and Technology State Key Laboratory for Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy MaterialsNational&Local Joint Engineering Research Center for Preparation Technology of NanomaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005P.R.China Fujian Science&Technology Innovation Laboratory for Energy Materials of China Xiamen 361005P.R.China

Room temperature sodium-sulfur(RT-Na-S) batteries are regarded as promising candidates for next-generation high-energy-density batteries. However, in addition to the severe shuttle effect, the inhomogeneous deposition of the insoluble sulfur species generated during the discharge/charge processes also contributes to the rapid capacity fade of RT-Na-S batteries. In this work, the deposition behavior of the insoluble sulfur species in the traditional slurry-coated sulfur cathodes is investigated using microporous carbon spheres as model sulfur host materials. To achieve uniform deposition of insoluble sulfur species, a self-supporting sulfur cathode fabricated by assembling microporous carbon spheres is designed. With homogeneous sulfur distribution and favorable electron transport pathway, the self-supporting cathode delivers remarkably enhanced rate capability(509 mA·h/g at 2.5 C, 1 C=1675 mA/g), cycling stability(718 mA·h/g after 480 cycles at 0.5 C) and areal capacity(4.98 mA·h/cm2 at 0.1 C), highlighting the great potential of manipulating insoluble sulfur species to fabricate high-performance RT-Na-S batteries.

关键词： Sodium sulfur battery Polysulfide Discharge/charge product High sulfur loading Stable cycling

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Two-color emissive AIEgens with anti-Kasha property for dual-organelle imaging and phototherapy

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Science China Chemistry 2024年第5期67卷 1740-1752页

作者： Pu Chen Guogang Shan Qingli Nie Yuting Yan Pengfei Zhang Zujin Zhao Hai-Tao Feng Ben Zhong Tang AIE Research Center Shaanxi Key Laboratory of PhytochemistryCollege of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China Institute of Functional Material Chemistry and National&Local United Engineering Lab for Power Battery Faculty of ChemistryNortheast Normal UniversityChangchun 130024China College of Chemistry&Materials Science Northwest UniversityXi’an 710127China Guangdong Key Laboratory of Nanomedicine CAS-HK Joint Lab of BiomaterialsCAS Key Laboratory of Biomedical Imaging Science and SystemShenzhen Engineering Laboratory of Nanomedicine and NanoformulationsCAS Key Lab for Health InformaticsShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China State Key Laboratory of Luminescent Materials and Devices Key Laboratory of Luminescence from Molecular Aggregates of Guangdong ProvinceSouth China University of TechnologyGuangzhou 510640China School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Shenzhen 518172China

Despite the rapid development of probes for targeting single organelle, the construction of robust dual-organelle targeting probes with multicolor emission was rarely reported. Herein, two dual-emissive aggregation-induced emission luminogens(AIEgens)with donor-π-acceptor structures were designed and synthesized, namely QT-1 and QF-2. Both two AIEgens exhibited excitation wavelength-dependence defying the Kasha's rule, and could stain lipid droplets(LDs) and mitochondria in blue and red fluorescence, respectively. Moreover, thanks to the near-infrared emission and abundant reactive oxygen species(ROS) generation efficiency of QT-1, it was chosen as a photodynamic therapy agent to selectively kill cancer cells from normal cells. Upon light irradiation, an obvious decrease of mitochondrial membrane potential(MMP) and serious change of mitochondrial shape in cells were observed, which corresponded to the efficient inhibition of tumor growth in vivo. This work afforded a promising strategy for the construction of multicolor emission by tuning anti-Kasha behaviors and expanding their application in dualorganelle targeting-based phototheranostics.

关键词： aggregation-induced emission anti-Kasha luminescence fluorescent probe bioimaging photodynamic therapy

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Self-assembled manganese phthalocyanine nanoparticles with enhanced peroxidase-like activity for anti-tumor therapy

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Nano Research 2022年第3期15卷 2347-2354页

作者： Jinghan Wang Shanqing Gao Xiao Wang Haozhen Zhang Xitong Ren Juewen Liu Feng Bai Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China Department of Chemistry Waterloo Institute for NanotechnologyWaterlooOntario N2L 3G1Canada Henan and Macquarie University Joint Centre for Biomedical Innovation School of Life SciencesHenan UniversityKaifeng 475004China

The use of functional nanoparticles as peroxidase-like(POD-like)catalyst has recently become a focus of research in cancer *** is a macrocyclic conjugated metal ligand,which is expected to achieve a high POD-like catalytic activity,generating free radicals and inhibiting the proliferation of cancer *** this paper,we synthesized phthalocyanine nanocrystals with different structures through noncovalent self-assembly confined within micro-emulsion droplets,and manganese phthalocyanine(MnPc)possessing a metal–N–C active center was used as the building *** nano-assemblies exhibit shape-dependent POD-like catalytic activities,because the emulsifier and MnPc co-mixed assembly reduced the close packing between MnPc molecules and exposed more active *** assembly had a water-dispersed nanostructure,which is conducive to accumulation at tumor sites through the enhanced permeability and retention effect(EPR).Because of a highly efficient microenvironmental response,the assembly showed higher catalytic activity only emerged under the acidic tumor-like microenvironment,but caused less damage to normal tissues in biomedical *** vivo and in vitro catalytic therapy tests showed excellent anti-tumor *** work explored a new way for the application of metal–organic macromolecules such as MnPc as nanozymes for catalytic tumor therapy.

关键词： self-assembly manganese phthalocyanine nanozymes peroxidase catalytic therapy

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Mechanism of high temperature oxidation of Inconel 625 superalloy with various solution and ageing heat treatment processes

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Transactions of Nonferrous Metals Society of China 2024年第11期34卷 3662-3676页

作者： Jiang-kun FAN Hong-ci YANG Pei-zhe ZHANG Jia-yu LI Zhan-jie JING Fu-long CHEN De-gui LIU Bin TANG Hong-chao KOU Jin-shan LI State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China National&Local Joint Engineering Research Center for Precision Thermoforming Technology of Advanced Metal Materials Xi’an 710072China Chongqing Innovation Center Northwestern Polytechnical UniversityChongqing 401135China AVIC Manufacturing Technology Institute Beijing 100024China

The high-temperature oxidation behaviour of the Inconel 625 alloy at 950℃ was investigated after different ageing *** effect of heat treatment on the oxidation behaviour of the alloy was analysed by characterizing the structure and elemental distribution before and after *** results reveal that the two ageing treatments at 650℃ for 500 h and at 750℃ for 400 h both reduced the oxidation mass *** oxidation at 950℃,an outer Cr_(2)O_(3) layer and inner Al_(2)O_(3) are identified as the main oxidation ***,Nb_(2)O_(5) andδ(Ni_(3)Nb)phases precipitated after *** ageing treatments cause the rapid generation of a dense Cr_(2)O_(3) layer on the surface,which prevents the diffusion of oxygen into the matrix,reduce the Al_(2)O_(3) inward growth depth,and improve the oxidation resistance of the alloy.

关键词： Inconel 625 alloy ageing treatment oxidation behaviour oxidation film kinetics

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