ACS Applied Energy Materials
·
2021
·
IF 6.024
Yuzhu Li,Jiajun Yang,Lai Xie,Yu Li,Xiwen Liang,Xubing Lu,Xingsen Gao,Jinwei Gao,Lingling Shui,Sujuan Wu,Jun-Ming Liu
In this work, 4-bromoaniline (BrAL) is employed to modify the CsPbI2Br/carbon electrode interface to passivate defects of all-inorganic CsPbI2Br perovskite solar cells (PSCs). The effects of BrAL modification on the structure, light absorption, and trap-state density (Ntrap) of CsPbI2Br films and the carrier recombination process, photoelectrical characteristics, and air stability of the PSCs are systematically studied. The results show that the hydrophobic BrAL interlayer modification can lead to a better matched energy-level alignment, reduce the Ntrap to construct uniform CsPbI2Br films, and suppress carrier recombination to promote charge transport and collection. Thus, the modified PSC achieves a higher power conversion efficiency (PCE) of 11.34% with less hysteresis (reference-PSC, 9.50%) and better stability in ambient air. The BrAL passivation provides a good strategy to enhance the photoelectrical performance and air stability of all-inorganic PSCs.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 9
·1188
·
IF 4.7
Heming Li,Xinming Wang,Ziyang Ding,Weiguo Gao,Yan Liu,Ke Ma,Zhizhi Hu,Yongqi Wang
Polymer materials with a low dielectric constant and low dielectric loss have the potential to be applied to high-frequency signal transmissions, such as mobile phone antennas and millimeter wave radars. Two types of diamines, 4,4′-diamino-p-tetraphenyl (DPT) and crown ether diamine (CED), were prepared for ternary copolymerization with BPDA in this study. Cross-links with molecular chains were formed, increasing molecular chain distance by utilizing rings of CED. The MPI films exhibit a good thermal performance with the increase in CED addition, with Tg > 380 °C and CTE from −4 × 10−6K−1to 5 × 10−6K−1. The Young’s modulus can reach 8.6 GPa, and the tensile strength is above 200 MPa when 5% and 7% CED are introduced. These MPI films exhibit good mechanical performances. The dielectric constant of PI−10% film can go as low as 3.17. Meanwhile, the relationship between dielectric properties and molecular structure has been demonstrated by Molecular Simulation (MS). PI molecules are separated by low dielectric groups, resulting in a decrease in the dielectric constant.
研究领域:
材料科学
·
高分子化学
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DOI
PubMed
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Zhifeng Yu,Chenqi Zhao,Zhelun Xiong,Zicheng Xiao,Meng He,Yining Wu,Yu Wang,Pingfan Wu,Wei Guo,Ning Zhang,Minghui Liang
The interaction between metals is an important factor to modify the catalytic roles of metallic catalysts, and it is highly desirable to reveal the relationship between metal-metal interaction and catalytic performance. Three types of Ir-Cu catalysts including Cu single atoms modified Ir nanoparticles and Ir-Cu alloy catalysts are prepared to observe the modifying role of Cu on Ir. Under relatively high temperature treatment, Ir-Cu alloy can be produced from Cu single atoms and Ir nanoparticles. The selectivity to bromoaniline (BAN) over Cu/C-Ir catalyst can be up to 99.9 % at the 100 % conversion of bromonitrobenzene (BNB), which is higher than that over Ir/C (94.3 %) and Ir-Cu/C alloy catalyst (98.5 %). The turnover frequencies (TOFs) of Cu/C-Ir catalysts are evidently lower than that of the Ir-Cu/C alloy catalyst, though their dispersions are higher than that of Ir-Cu/C alloy catalyst. The electronic transfer from Cu single atoms to Ir nanoparticles not only weakens the hydrogen adsorption ability but reduces the number of active sites available for splitting hydrogen molecules into hydrogen atoms, leading to a decrease in the catalytic activity for the selective hydrogenation of BNB. The interaction exerted by unalloyed Cu single atoms on Ir nanoparticles differs from that of alloyed Cu on Ir, which may be the possible reason for the different catalytic performance between Cu single atoms modified Ir nanoparticles and Ir-Cu alloy.
研究领域:
化学工程
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材料科学
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催化
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Jianing Li,Dongkui Zhang,Jiangbin Xia
Herein, hydrothermal method was used to prepare a series of multi-color polythiophene modified carbon quantum dots. Under UV excitation, fluorescence their maximum emission wavelengths appear at 612 nm, 570 nm, and 540 nm respectively. The prepared CD-BTH and CD-BN can have specific detection of Au 3+ and Hg 2+ through fluorescence quenching effect. The detection limits for Au 3+ are 3 nM and 5.4 nM respectively, and for Hg 2+ are 23 nM and 90 nM respectively. CD-KN detects Au 3+ specifically through fluorescence resonance, with a detection limit of 33 nM. Under the interference of other metal ions, three types of polythiophene modified quantum carbon dots exhibit excellent selectivity for the responsive ions. Meanwhile, this article also elucidates the law that as the electron withdrawing ability of the side chains of polythiophene derivatives increasing, the fluorescence emission peaks of the prepared polythiophene modified carbon dots shifts red and the fluorescence quantum yield is higher.
研究领域:
材料科学
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分析化学
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DOI
PubMed
高影响因子
LUMINESCENCE
·
2024
·Vol. 39
·期 4
·e4729
·
IF 3.2
Han Qian,Jiazhuang Tian,Xiaozhou Jiang,Bangcui Zhang,Xueliang Li,Yanhua Yang,Shulin Gao,Lin Shao,Fumin Li
To further explore the relationship between aryl substituents and mechanofluorochromic (MFC) behaviors, four salicylaldimine-based difluoroboron complexes (ts-Ph BF 2 , ts-Ph-NA BF 2 , ts-2NA BF 2 , and ts-triphenylamine [TPA] BF 2 ), including aromatic substituents with different steric hindrance effects, were designed and successfully synthesized. Four complexes with twisted molecular conformation displayed intramolecular charge transfer and aggregation-induced emission properties. Under external mechanical stimuli, the as-synthesized powders of ts-Ph BF 2 , ts-Ph-NA BF 2 , and ts-TPA BF 2 exhibited redshift fluorescence emission behaviors, and ts-Ph BF 2 and ts-TPA BF 2 could be recovered to original shifts by fuming, but ts-Ph-NA BF 2 displayed irreversible switching. ts-2NA BF 2 had no change during the grinding and fuming processes. The results indicated that the MFC behaviors could be attributed to the phase transformation between the well-defined crystalline and disordered amorphous states by X-ray diffraction measurement. Further research illustrated that ts-TPA BF 2 with the most significant MFC phenomenon could be applied in data security protection in ink-free rewritable paper.
研究领域:
材料科学
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化学
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光电材料
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数据安全
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DOI
PubMed
高影响因子
C-Journal of Carbon Research
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2024
·Vol. 10
·期 3
·62
·
IF 3.9
Xuexin Yuan,Qiqi Zhou,Yu Chen,Hai-Jian Yang,Qingqing Jiang,Juncheng Hu,Cun-Yue Guo
In the present work, inexpensive and commercially available diethyltriamine pentaacetic acid (DTPA) was used as an initiator to catalyze the N-formylation reaction of CO2with amines via the construction of C-N bonds in the presence of xanthone as the photosensitizer and PhSiH3as the reducing agent. After a systematic study of various factors, the optimal conditions for the photocatalytic reaction were obtained: 2.5 mmol of amine, 2.5 mmol of PhSiH3, 10 mol% of DTPA, 20 mol% of xanthone, 1 mL of dimethylsulfoxide (DMSO), atmospheric pressure, and 35 W UV lamp irradiation for 48 h. Under the optimal conditions, the catalyst system afforded high performance for the N-formylation of amines (primary and secondary amines) and CO2, and the yields of the N-formylated products of dialkylamines were above 70%. Further studies exhibit that the catalytic system has a wide scope of substrate applications. For various alicyclic secondary amines, heterocyclic secondary amines, aliphatic primary amines, and aromatic primary amines, the corresponding N-formylation products can be obtained efficiently. In addition, the catalyst can be recycled by simple precipitation and filtration. After five cycles of recycling, there was no significant change in the catalytic and structural properties of DTPA. Finally, a possible reaction mechanism is proposed.
研究领域:
化学
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环境科学
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材料科学
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DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Zhiheng Zhang,Hongchen Chen,Weize Diao,Chuangxin Zhou,Guozhen Liu
Eutectic gallium indium (EGaIn) nanoparticles can be modified with aniline derivatives to introduce versatile functional groups toward bioapplications beyond materials science. The p-aminobenzoic acid (PABA) modified EGaIn (EGaIn-PABA) demonstrated high wettability with the presence of carboxyl groups, but the priority of carboxyl and amino groups binding on EGaIn surface remains unclear. To study the binding nature of PABA to EGaIn, the anti-mouse IgG antibody labeled with fluorescein isothiocyanate (FITC) (IgG-FITC) was covalently modified to EGaIn-PABA to verify the presence of terminal carboxyl groups on EGaIn surface. The binding of gold nanoparticles (AuNPs) to EGaIn-PABA nanoparticles suggested the presence of terminal amino groups on EGaIn surface. Then, taking advantage of the reductive nature of amino groups, the Almar blue fluorescence experiment was designed to determine the co-existence of carboxyl and amino groups on the EGaIn-PABA surface with the approximate ratio of 3:7, suggesting carboxyl groups had a higher probability of binding with the EGaIn surface than that of amino groups. Then, an aptasensor was fabricated on the EGaIn-PABA surface with AuNPs for electrochemical detection of interleukin-6 with a sensitivity of 1 pg/mL.
研究领域:
材料科学
·
生物传感器
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纳米技术
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分析化学
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生物医学工程
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mingyang Guan,Ziyang Huang,Ziting Bao,Yourong Ou,Siyi Zou,Guozhen Liu
Liquid metals, especially for eutectic gallium-indium (EGaIn) have become popular materials in various bioapplications due to their fluidity, conductivity, biocompatibility and antibacterial properties. However, gallium can rapidly form oxide films at ambient conditions, limiting its performance. Taking advantages of the hydrogen bonding between amine groups and gallium oxide interface on EGaIn, EGaIn nanoparticles are modified with p -phenylenediamine (PPD) to inhibit oxidation and attach gold nanoparticles (AuNPs) to achieve EGaIn-PPD@Au nanoparticles. The addition of PPD in making EGaIn nanoparticles can diminish the oxidation of gallium while forming the ligand shell on EGaIn with amine groups. EGaIn-PPD@Au nanoparticles demonstrate high electrical and thermal conductivity together with outstanding photothermal capability. EGaIn-PPD@Au based wearable skin patch can be modified with aptamers for electrochemical detection of C-reactive protein, achieving detection limit of 0.5 mg L -1 . A pressure sensor patch fabricated by incorporating EGaIn-PPD@Au into polydimethylsiloxane (PDMS) can withstand more than 4 MPa pressure (error of less than 0.003 MPa −1 ). EGaIn-PPD@Au based PDMS photothermal patches also demonstrate anti-inflammation and wound healing properties in S. aureus treated inflammation rat model.
研究领域:
生物医学工程
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材料科学
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医学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Zaixiang Zhang,Xin Li,Yang Yang,Deyin Wang,Ying Song,Feng Feng
In order to study the polymorphism of derivatives with different halogen substitutions, four halogen analogs of N-(5′-halosalicylidene)-4-haloaniline (5XY) were prepared. In addition to the 5CC, the other three derivatives were found to exhibit polymorphs with similar color and morphology. The crystal structures were determined, and four derivatives in the same forms showed similar molecular conformation, molecular packing in the unit cell and intermolecular contacts. According to thermal analysis, three derivatives (5CB, 5BC, and 5BB) exhibited a solid-state phase transition from orange to yellow form upon heating, and the transformation was successfully monitored using microscopy and FTIR, whereas the two forms of 5CC could stay stable for a long time, even when heated. Similar phase transition phenomena were observed in solution studies. The research elucidates that polymorphism of derivatives with the same type substituents is very similar.
研究领域:
材料科学
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有机化学
·
晶体学
·
物理化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wen Qin,Chengyuan Zheng,Haoming Qin,Yang Song,Yang Zhou,Jin Jiang,Jun Ma
Permanganate/electron shuttle systems for the enhanced transformation of anilines were evaluated. The presence of electron shuttles (2,2’-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS), 1-hydroxybenzotriazole (HBT) and catechol (CAT) accelerated the oxidative transformation of aniline by Mn(VII). In the Mn(VII)/ABTS process, ABTS •+ was partially consumed through fragmentation or polymerization with aniline, while the second-order rate constants ( k app 2 , M −1 s −1 ) of the interaction of ABTS •+ with aniline rose from 86.57 to 140.04 M −1 s −1 with increase in pH from 5 to 8. In the Mn(VII)/HBT system, aniline removal was markedly enhanced under acidic conditions due to the formation of polymerized products via radical cations (HBT • ). Furthermore, the oxidative transformation of aniline (82.5 %) by Mn(VII)/CAT was significantly higher than that by Mn(VII) (65.2 %) because of Michael addition reaction of aniline and ortho-benzoquinone (o-BQ). Moreover, the formation of Mn(III) was confirmed by the overall oxidation state (3.13) and the X-ray Photoelectron Spectroscopy (XPS) spectra of the Mn products in the CAT/Mn(VII) process, revealing a synergistic mechanism between o-BQ and Mn(III) for enhanced aniline degradation.
研究领域:
环境科学
·
化学
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DOI
PubMed
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Yunjia Wei,Dexiang Chen,Xingce Fan,Xiao Tang,Lei Yao,Xing Zhao,Qiang Li,Jiawei Wang,Teng Qiu,Qi Hao
The Suzuki–Miyaura coupling reaction is an efficient organic method for synthesizing biphenyl products. However, its conventional reliance on toxic soluble organometallic palladium catalysts or expensive palladium nanoparticles, along with the need for elevated temperatures and prolonged reaction times, presents a significant challenge. Herein, we demonstrate a palladium-free approach using plasmonic silver nanoparticles that enables the Suzuki–Miyaura coupling reaction to proceed at room temperature under visible light. Utilizing the surface-enhanced Raman scattering characteristics of silver, we conducted dynamic self-monitoring of the reaction. Our findings reveal that this plasmon-induced Suzuki–Miyaura coupling reaction fundamentally operates as a heterogeneous reaction involving coupling between radicals, distinct from conventional palladium-based reactions. Moreover, the cleavage of C–Cl and C–B bonds, fundamental prerequisite to the coupling, is driven by plasmonic hot electrons and plasmon-induced reactive oxygen species, respectively. These findings not only provide insights into the design and regulation of plasmonic catalysts but also enhance theoretical understanding of the Suzuki–Miyaura reaction in a broader context.
研究领域:
化学
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材料科学
·
光催化
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 41
·10666-10676
·
IF 5.236
Peng Zhang,Shaonan Xu,Yan Wang,Wei Zhang,Wenqing Li,Cundi Wei,Peiping Zhang,Shiding Miao
Graphical One man‘s trash is another man‘s treasure : A novel template strategy allows fibrous struvite—a composite Pd/Mg 2 P 2 O 7 with a mesoporous structure and an ultrahigh surface area—to be synthesized from wastewater. The prepared Pd/Mg 2 P 2 O 7 nanowires showed excellent performance in the selective hydrogenation of nitrobenzenes. This strategy provided a new pathway for synthesizing highly efficient catalysts as well as a solution for alleviate eutrophic pollution caused by N- and P-containing substances in wastewater. A highly efficient heterogeneous catalyst Pd/Mg 2 P 2 O 7 was fabricated by combining palladium nanoparticles (PdNPs) and mesoporous Mg 2 P 2 O 7 fibers/rods. Mg 2 P 2 O 7 fibers with ultra-high specific surface area were prepared from struvite as templates, which were synthesized from waste water containing N- and P-containing pollutants. This strategy provided a novel pathway for developing advanced catalysts from eutrophication-polluted water. The composite Pd/Mg 2 P 2 O 7 showed brilliant performance in selective hydrogenation of nitro aromatics to give anilines. As an example of nitrobenzene hydrogenation, the conversion to aniline and selectivity were found to reach almost 100 % at a temperature of T =90 °C and under a pressure of P =2.0 MPa. The superior performance was found to originate from PdNPs, which were boosted by electron transfer afforded by the nanofiber Mg 2 P 2 O 7 supports. The favorable adsorption of withdrawing groups (−NO 2 ) was realized by synergistic effects between Pd and oxygen vacancies provided by pyrolysis of struvite. The catalyst remained stable after cycles of reuse with little degradation in catalytic performance.
研究领域:
环境科学
·
催化化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）