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The effect of Y3+ on microstructure and scintillation properties of hot-pressed Eu2+ doped CaF2 transparent ceramics

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Journal of Luminescence 2025年 286卷

作者： Zhou, Zhiwei Zhang, Pengshuai Chen, Guanyu Yuan, Dan Jing, Wentao Yang, Yu Jin, Qianqian Lan, Yuangang Mei, Bingchu School of Electronic Engineering Guangxi University of Science and Technology Liuzhou545006 China Guangxi Key Laboratory of Multidimensional Information Fusion for Intelligent Vehicles Guangxi University of Science and Technology Liuzhou545006 China Guangxi Colleges and Universities Key Laboratory of Microwave Communication and Micro–Nano Photoelectric Technology Guangxi University of Science and Technology Liuzhou545006 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

CaF2:Eu2+ transparent ceramics with and without Y3+ doping were fabricated by the hot-pressed sintering method under the inert atmosphere via the co-precipitation-synthesized nanoparticles. After the co-doping of Y3+, there was no significant change in the particle size of the nanoparticles, but the grain size of the ceramics was markedly reduced. The optical transmission of CaF2: Eu2+, Y3+ ceramics at 425 nm achieved approximately 46.3 %, surpassing that of CaF2:Eu2+ ceramics. With Y3+ ions co-doping, the photoluminescence (PL) and X-ray induced emission spectra displayed stronger emission bands at 422 nm ascribed to 5d-4f transitions of Eu2+ ions and weaker emission peaks at 550–650 nm range originating from 4f-4f transitions of Eu3+ ions in Eu2+:CaF2 ceramic. Furthermore, the effect of co-doped Y3+ ions on the scintillation decay lifetime, pulse height spectra, and thermoluminescence of the samples were investigated. © 2025

关键词： Scintillation

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Alloying effect enhanced bimetallic Ni-Fe/TiO 2 catalysts for selective hydrogenation of 1,3-butadiene in the presence of an excess of propylene

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Molecular Catalysis 2023年 550卷

作者： Wei-Hao Wang Bo Jiang Zhao Wang Ya Chen Yao Li Ting-Ting Luo Feng Cheng Bao-Lian Su The State Key Laboratory of Advanced Technology for Material Synthesis and processing Wuhan University of Technology Wuhan 430070 China Center for Materials Research and Analysis Wuhan University of Technology Wuhan 430070 China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium

Nickel is a promising Pd alternative candidate for selective alkynes/alkadienes hydrogenation owing to its high catalytic activity and cheap price, however, with fatal restrictions of low alkenes selectivity and inferior stability caused by its strong olefin adsorption and the cleavage of carbon-carbon bond. Herein, controlled amounts of iron were introduced into nickel as catalytic assistant by deposition-precipitation with urea on TiO 2 support. Using 1,3-butadiene in an excess of propylene to simulate the industrial process, the additional Fe shows a significant enhancement to the catalytic performance of Ni, i.e., Ni-Fe/TiO 2 with Ni/Fe atomic ratio 1:0.33 shows >94% of 1,3-butadiene conversion and >95% of alkenes selectivity after above 200 h of time on stream, superior to that of commercial Pd/Al 2 O 3 catalyst. Further in-situ analysis reveals that the alloying effect from the formation of Ni-rich Ni-Fe intermetallic compound (e.g., Ni 3 Fe alloy) enlarges the distance between two Ni active sites and enriches the electronic density of Ni sites, resulting in a weak adsorption of butenes products for offering such excellent catalytic performance. To the best of our knowledge, this is the first in-depth exploration on supported Ni-Fe bimetallic catalyst for selective hydrogenation of light alkynes/alkadienes. It shows a high potential for replacing the commercial Pd-based catalysts.

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Appending Coronene Diimide with Carbon Nanohoops Allows for Rapid Intersystem Crossing in Neat Film

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Angewandte Chemie 2024年第18期136卷

作者： Jingjing Zhao Jingwen Xu Dr. Huaxi Huang Kangwei Wang Prof. Dr. Di Wu Prof. Dr. Ramesh Jasti Prof. Dr. Jianlong Xia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology 430070 Wuhan China These authors contributed equally International School of Materials Science and Engineering Wuhan University of Technology 430070 Wuhan China School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology 430070 Wuhan China Department of Chemistry and Biochemistry Materials Science Institute University of Oregon 97403 Eugene Oregon USA

The development of innovative triplet materials plays a significant role in various applications. Although effective tuning of triplet formation by intersystem crossing (ISC) has been well established in solution, the modulation of ISC processes in the solid state remains a challenge due to the presence of other exciton decay channels through intermolecular interactions. The cyclic structure of cycloparaphenylenes (CPPs) offers a unique platform to tune the intermolecular packing, which leads to controllable exciton dynamics in the solid state. Herein, by integrating an electron deficient coronene diimide (CDI) unit into the CPP framework, a donor-acceptor type of conjugated macrocycle ( CDI-CPP ) featuring intramolecular charge-transfer (CT) interaction was designed and synthesized. Effective intermolecular CT interaction resulting from a slipped herringbone packing was confirmed by X-ray crystallography. Transient spectroscopy studies showed that CDI-CPP undergoes ISC in both solution and the film state, with triplet generation time constants of 4.5 ns and 238 ps, respectively. The rapid triplet formation through ISC in the film state can be ascribed to the cooperation between intra- and intermolecular charge-transfer interactions. Our results highlight that intermolecular CT interaction has a pronounced effect on the ISC process in the solid state, and shed light on the use of the characteristic structure of CPPs to manipulate intermolecular CT interactions.

关键词： cycloparaphenylenes rylene diimides triplet materials intersystem crossing

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Synergistic effects of carbon doping and coating of TiO2 with exceptional photocurrent enhancement for high performance H2 production from water splitting

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能源化学 2021年第5期56卷 141-151页

作者： Yingying Wang Yan-Xin Chen Tarek Barakat Tian-Ming Wang Alain Krief Yu-Jia Zeng Marvin Laboureur Luca Fusaro Hong-Gang Liao Bao-Lian Su Laboratory of Inorganic Materials Chemistry (CMI) University of Namur B-5000 Namur Belgium Namur Institute of Structured Matter (NISM) University of Namur B-5000 Namur Belgium Laboratory of Inorganic Materials Chemistry (CMI) University of Namur B-5000 Namur Belgium Xiamen Institute of Rare Earth Materials Haixi Institutes Chinese Academy of Sciences Xiamen 361021 Fujian China Xiamen Institute of Rare Earth Materials Haixi Institutes Chinese Academy of Sciences Xiamen 361021 Fujian China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 Guangdong China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 Fujian China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur B-5000 Namur Belgium Namur Institute of Structured Matter (NISM) University of Namur B-5000 Namur Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430074 Hubei China

The 'one pot' simultaneous carbon coating and doping of TiO2 materials by the hydrolysis of TiCl4 in fructose is *** synergistic effect of carbon doping and coating of TiO2 to significantly boost textural,optical and electronic properties and photocurrent of TiO2 for high performance visible light H2 production from water splitting has been comprehensively *** doping can significantly increase the thermal stability,thus inhibiting the phase transformation of the Titania material from anatase to rutile while carbon coating can suppress the grain aggregation of *** synergy of carbon doping and coating can not only ensure an enhanced narrowing effect of the electronic band gap of TiO2 thus extending the absorption of photocatalysts to the visible regions,but also promote dramatically the separation of electron-hole *** to these synergistic effects,the carbon coated and doped TiO2 shows much superior photocatalytic activity for both degradation of organics and photocatalytic/photoelectro chemical (PEC) water splitting under simulated sunlight *** photocatalytic activity of obtained materials can reach 5,4 and 2 times higher than that of pristine TiO2,carbon doped TiO2 and carbon coated TiO2,respectively in the degradation of organic *** carbon coated and doped TiO2 materials exhibited more than 37 times and hundreds of times photocurrent enhancement under simulated sunlight and visible light,respectively compared to that of pristine *** present work providing new comprehensive understanding on carbon coating and doping effect could be very helpful for the development of advanced TiO2 materials for a large series of applications.

关键词： Carbon coating and doping TiO2 One-pot PEC water splitting Solar light photocatalysis

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Emerging semiconductors and metal-organic-compounds-related photocatalysts for sustainable hydrogen peroxide production

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Matter 2022年第7期5卷 2119-2167页

作者： Yang Ding Soumyajit Maitra Somoprova Halder Chunhua Wang Runtian Zheng Tarek Barakat Subhasis Roy Li-Hua Chen Bao-Lian Su Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles 5000 Namur Belgium Namur Institute of Structured Matter (NISM) University of Namur 61 rue de Bruxelles 5000 Namur Belgium Department of Chemical Engineering University of Calcutta 92 APC Road Kolkata West Bengal 700009 India Department of Chemistry KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan Hubei 430070 China Clare Hall University of Cambridge CB2 1EW Cambridge UK

As a versatile raw material, hydrogen peroxide (H 2 O 2 ) is extensively employed in chemicals synthesis, medical disinfection, textile industry, and environmental remediation fields. H 2 O 2 generation through a photocatalytic route has attracted increasing interest. Tremendous progress and achievements have been made over the past decades in photocatalytic H 2 O 2 production. Herein, we critically review the state-of-the art developments on various photocatalysts, including carbon nitride, titania, bismuth, sulfide, carbon, and metal-organic-compound-related materials, for the highly efficient light-driven H 2 O 2 synthesis. Significantly, these materials show tunable morphology, micro-nanostructure, surface chemistry, and electronic band-gap structure characters for sufficient light harvesting, rapid hole-electron pairs separation and transfer, and favorable reactants adsorption as well as facilitated products desorption, thus delivering great activity for efficient light-driven H 2 O 2 production. The specific challenges and opportunities related to photocatalytic materials discovery and development that will emerge from this important field are discussed.

关键词： hydrogen peroxide photocatalysts design carbon nitride titania metal-organic materials

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Ammonium Ion Batteries: Material, Electrochemistry and Strategy

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Angewandte Chemie 2023年第23期135卷

作者： Runtian Zheng Yuhang Li Dr. Haoxiang Yu Xikun Zhang Dr. Ding Yang Dr. Lei Yan Prof. Yu Li Prof. Jie Shu Prof. Bao-Lian Su School of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 Zhejiang China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles 5000 Namur Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China

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Crystallization Thermodynamics Regulation of 1.85 eV Wide-Bandgap Perovskite for Efficient and Stable Perovskite-Organic Tandem Photovoltaics

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Angewandte Chemie 2025年

作者： Guanshui Xie Dr. Huan Li Jun Fang Xin Wang Haichen Peng Dr. Dongxu Lin Nuanshan Huang Lin Gan Prof. Wenjia Li Ruixuan Jiang Prof. Tongle Bu Prof. Fuzhi Huang Prof. Sisi He Prof. Longbin Qiu Department of Mechanical and Energy Engineering SUSTech Energy Institute for Carbon Neutrality Southern University of Science and Technology Shenzhen 518055 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 P. R. China Shenzhen Key Laboratory of Flexible Printed Electronics Technology School of Science Harbin Institute of Technology (Shenzhen) University Town Shenzhen Guangdong 518055 China

Wide-band gap perovskite with adjustable band gaps can be integrated with organic solar cells to form tandem solar cells (TSCs), thereby surpassing the Shockley–Queisser limit. However, increasing Br content to elevate the band gap above 1.8 eV complicates crystallization, leading to inferior film quality and defects due to the unmanageable evolution of intermediate phases. Surface passivation improves crystallization but hard to moderate the inhomogeneous component distributions and defects in the bulk phase. Here, we introduce a diammonium salt as an additive to regulate the homogeneity and crystallization of perovskite film, eliminating the low-dimensional intermediate phase for orientated crystallization of 1.85 eV perovskite, resulting in efficient wide-band gap perovskite solar cells with an impressive open-circuit voltage ( V oc ) of 1.379 V and operational stability remaining 85 % of their initial efficiency after illumination for 1200 h. Furthermore, perovskite-organic TSCs achieve a champion power conversion efficiency of 24.03 % and a high V oc of 2.108 V, one of the highest V oc for perovskite-organic TSCs.

关键词： Wide-band gap perovskite Low-dimensional intermediate phase Suppressed phase segregation Reduced voltage loss Perovskite-organic tandem solar cells

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Excipient-free porphyrin/SN-38 based nanotheranostics for drug delivery and cell imaging

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Nano Research 2020年第2期13卷 503-510页

作者： Ye Yuan Ruonan Bo Di Jing Zhao Ma Zhongling Wang Tzu-yin Lin Lijie Dong Xiangdong Xue Yuanpei Li Center for Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China Department of Biochemistry and Molecular Medicine UC Davis Comprehensive Cancer CenterUniversity of California DavisSacramento 95817USA School of Veterinary Medicine Yangzhou UniversityYangzhou 225009Chino Department of Oncolog) Xiangya HospitalCentral South UniversityChangsha 410008China Department of Radiology Shanghai General HospitalShanghai jiao Tong University School of MedicineShanghai 200080China Division of Hematology/Oncology Department of Internal MedicineUniversity of California DavisSacramento 95817USA College of Life Sciences Northwest UniversityXian 710069China

Nanotheranostics with comprehensive diagnostic and therapeutic capabilities show exciting cancer treatment ***,we develop an excipient-free drug delivery system for cancer diagnosis as well as therapy,in which a near infra-red photosensitizer and a chemotherapeutic drug can be self-delivered without any *** building block of the drug delivery system was synthesized by covalently conjugating four anticancer drugs(7-ethyl-10-hydroxy-camptothecin,SN-38)with a photosensitizer(porphyrin)via hydrolyzable ester linkage,which endows the drug delivery system with 100%active pharmaceutical ingredients,excellent imaging,and therapeutic *** conjugates can readily self-assemble into nanosheets(PS NSs)and remain stable for at least 20 days in aqueous *** PS NSs,fluorescence resonance energy transfer(FRET)dominates the fluorescence of SN-38 and enables to monitor the drug release *** PS NSs also show excellent anticancer activity in vitro,due to the increased cell uptake with the synergistic effect of photodynamic therapy and chemotherapy.

关键词： porphyrin 7-ethyl-10-hydroxy-camptothecin(SN-38) drug delivery self-indication nanotheranostics photodynamic therapy

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Symmetry-Broken Ru Nanoparticles with Parasitic Ru-Co Dual-Single Atoms Overcome the Volmer Step of Alkaline Hydrogen Oxidation

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Angewandte Chemie 2024年第12期136卷

作者： Xueqin Q. Mu Prof. Suli L. Liu Mengyang Y. Zhang Zechao C. Zhuang Ding Chen Yuru R. Liao Hongyu Y. Zhao Prof. Shichun C. Mu Dingsheng S. Wang Prof. Zhihui H. Dai School of Chemistry and Molecular Engineering Nanjing Tech University Nanjing 211816 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 P. R. China Engineering Research Center of Advanced Rare Earth Materials Department of Chemistry Tsinghua University Beijing 100084 P. R. China

Efficient dual-single-atom catalysts are crucial for enhancing atomic efficiency and promoting the commercialization of fuel cells, but addressing the sluggish kinetics of hydrogen oxidation reaction (HOR) in alkaline media and the facile dual-single-atom site generation remains formidable challenges. Here, we break the local symmetry of ultra-small ruthenium (Ru) nanoparticles by embedding cobalt (Co) single atoms, which results in the release of Ru single atoms from Ru nanoparticles on reduced graphene oxide (Co 1 Ru 1,n /rGO). In situ operando spectroscopy and theoretical calculations reveal that the oxygen-affine Co atom disrupts the symmetry of ultra-small Ru nanoparticles, resulting in parasitic Ru and Co dual-single-atom within Ru nanoparticles. The interaction between Ru single atoms and nanoparticles forms effective active centers. The parasitism of Co atoms modulates the adsorption of OH intermediates on Ru active sites, accelerating HOR kinetics through faster formation of *H 2 O. As anticipated, Co 1 Ru 1,n /rGO exhibits ultrahigh mass activity (7.68 A mg Ru −1 ) at 50 mV and exchange current density (0.68 mA cm −2 ), which are 6 and 7 times higher than those of Ru/rGO, respectively. Notably, it also displays exceptional durability surpassing that of commercial Pt catalysts. This investigation provides valuable insights into hybrid multi-single-atom and metal nanoparticle catalysis.

关键词： dual-single-atom catalysts hydrogen oxidation reaction symmetry-breaking parasitic Ru nanoparticles

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TiO 2 nanofluid infused nanocoating for long-term anti-corrosion

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Chemical Physics Letters 2023年 830卷

作者： Zi-Yan Xu Jing-jing Xie Hao Yu Yang Ge Wei Geng Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & Shenzhen Research Institute & Laoshan Laboratory Wuhan University of Technology Wuhan 430070 PR China School of Chemical Engineering and Technology Sun Yat-Sen University 2 Daxue Road Zhuhai 519082 PR China

Marine corrosion has been a global problem with the damage on environment, and economy. With the development, traditional coating technology is difficult to meet the current demands of applications. In this study, TiO 2 nanoparticles were modified and dispersed in silicone oil to form TiO 2 nanofluid. And, the nanofluid was infused into hierarchical structure to produce the SLIPS which is obtained by spraying with the solution of Al 2 O 3 , which significantly reduce the lubricant leaching. As synthesized coating shows the good performance in corrosion resistance. The coating prepared by this novel method show the great potential applications in different marine environments.

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