INORGANIC CHEMISTRY
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2024
·
IF 4.3
Xiaowei Yang,Yanfei Zou,Chen Hu,Shikun Su,Zhenghang Wang,Houhe Dong,Wenying Teng,Bing Teng,Bingtao Zhang,Degao Zhong
Cr4+-activated phosphors are important candidate materials for NIR-II light sources, but providing a suitable lattice coordination environment for Cr4+ and achieving long wavelength broadband emission remains a challenge. In this work, a series of Cr4+-activated ABO2 (A = Li, Na; B = Al, Ga) phosphors were successfully prepared. Due to the presence of only tetrahedral coordination structures available for Cr4+ to occupy in the matrix crystal ABO2, the valence state and luminescence stability of Cr4+ are effectively guaranteed. Through the cation substitution design of A-site (Na → Li) and B-site (Ga → Al), the [BO4] tetrahedron is distorted and expanded, which degrades the symmetry of the Cr4+ coordination crystal field. Consequently, the central wavelength of the Cr4+ emission peak is tuned from 1280 to 1430 nm, and the fwhm is significantly extended from 257 to 355 nm. Thebroadband NIR-II light sources constructed with LiAlO2: 0.03Cr4+ and NaGaO2: 0.03Cr4+ phosphors verify their important potential applications in nondestructive testing and biological imaging.
研究领域:
材料科学
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光学材料
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固态化学
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光子学
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近红外光源
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DOI
高影响因子
POLYMER
·
2021
·
IF 4.43
Hongyu Zhu,Yu Liu,Dongxu Gu,Zikun Rao,Yang Li,Jianyuan Hao
It is a challenging work to design novel responsive materials by controlling the secondary structure of polypeptide , especially β-sheet. We designed and synthesized a novel dual responsive diblock copolymer of methyl poly (ethylene glycol)- b -poly (O-benzyl- l -threonine) (mPEG- b -PBnLT). The copolymer solutions exhibited unusual and reversible gel-to-sol-to-gel transition behavior with temperature, and the transition temperature window could be easily adjusted by changing copolymer concentration or PBnLT block length . It was confirmed that low temperature gel-to-sol transition was due to the disassembly of the preliminary β-sheet layered nano-assemblies that induced the transformation of self-organized morphology from nanosized fibrils to spherical aggregates, while the high temperature sol-to-gel transition was ascribed to the dehydration of PEG segments. The disassembly of β-sheet structures was caused by the change in the polarity of the pendant benzyl ether bond of PBnLT block in water with temperature. This stimuli-responsiveness of secondary self-assembled nanostructures and the corresponding change in macroscopic phase transition inspires a brand-new strategy for structural design and functional control of polypeptide materials.
研究领域:
高分子科学
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材料化学
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纳米技术
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智能材料
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生物聚合物
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DOI
高影响因子
CHEMISTRY OF MATERIALS
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2020
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IF 9.567
Dongjie Liu,Xiaohan Yun,Peipei Dang,Hongzhou Lian,Mengmeng Shang,Guogang Li,Jun Lin
Recently, there has been growing interest in developing Bi3+-activated luminescence materials for optoelectronic applications. Herein, new yellow/orange-emitting ABZn2Ga2O7:Bi3+ (ABZGO, A = Ca, Sr; B = Ba, Sr) phosphors with tunable optical properties are synthesized by an alkaline earth cation substitution. When Sr2+ substitutes Ca2+ and Ba2+, the excitation wavelength has a red shift from 325 to 363 nm, matching well with the n-UV chip based white light-emitting diodes (WLEDs). CaBaZn2Ga2O7:0.01Bi3+ (CBZGO:0.01Bi3+) exhibits two evident emission peaks at 570 and 393 nm originating from the respective occupation of Ca and Ba sites by Bi3+ ions. The optical tuning of the CBZGO:Bi3+ phosphor is achieved by changing the Bi3+ doping content and excitation wavelength based on the selected site occupation. Differently, both SrBaZn2Ga2O7:0.01Bi3+ (SBZGO:0.01Bi3+) and Sr2Zn2Ga2O7:0.01Bi3+ (SZGO:0.01Bi3+) phosphors exhibit a single broad emission band, peaking at 600 and 577 nm, respectively. Two different Bi3+ sites are also verified respectively in SBZGO and SZGO hosts by the Gaussian fitting of the asymmetric PL spectra and lifetime analysis. The different luminescence behaviors of ABZGO:0.01Bi3+ phosphors should be ascribed to the synergistic effect of the centroid shift, crystal-field splitting, and Stokes shift. Moreover, the temperature-dependent PL spectra reveal that cation substitutions of Sr2+ for Ca2+ and Ba2+ can efficiently improve the thermal stability of ABZGO:0.01Bi3+ phosphors. In view of different thermal responses to various temperatures for two emission peaks of the CBZGO:0.01Bi3+ phosphor, an optical thermometer is designed and has a good relative sensitivity (Sr = 1.453% K–1) at 298 K. Finally, a WLED with CRI = 97.9 and CCT = 3932 K is obtained by combining SZGO:0.01Bi3+ and BAM:Eu2+ phosphors with a 370 nm n-UV chip, demonstrating that SZGO:0.01Bi3+ is an excellent yellow-orange-emitting phosphor for n-UV WLED devices. This work stimulates the exploration of optical tuning by cation substitution to obtain remarkable luminescence materials for optical temperature sensing and WLED applications.
研究领域:
材料科学
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光电子学
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发光与荧光粉
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固态照明
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温度传感
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2026
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IF 7.9
Han Yu,Ying Wang,Zhen Shi,Chenxi Fang,Hang Zeng,Junting Sun,Vilko Mandić,Xuefeng Zhang
Although superhydrophobic coatings have been widely employed for corrosion protection due to their low surface energy, their low surface energy characteristic also results in weak interfacial adhesion and the influence of interfacial adhesion on the overall anti-corrosion performance remains poorly understood. Herein, we explored the corrosion resistance of superhydrophobic coatings on sintered Nd-Fe-B magnets from the perspective of work of adhesion (Wₐ), which represented the interfacial stability and bonding strength. By precisely controlling the PDA shell thickness and the degree of hydrophobization, the work of adhesion can be regulated correspondingly. The results revealed that the overall anti-corrosion performance of superhydrophobic coatings was directly proportional to the work of adhesion. At an optimized Wₐ of 49.44 mN·m -1 , the coated magnet exhibited a low corrosion current density of 1.09 × 10 −8 A/cm 2 , which was three orders of magnitude lower than that of 3.27 × 10 −5 A/cm 2 for bare Nd-Fe-B magnet. Moreover, outstanding protection durability was also demonstrated in both acidic and alkaline environments with robust interfacial contact. In contrast, weak adhesion induced the formation of interfacial gaps, which served as preferred penetration pathways for the corrosive medium. This study evidenced the importance of interfacial structural integrity, revealing the critical role of adhesion layer design in enabling robust and durable anti-corrosion performance of superhydrophobic coatings.
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DOI
高影响因子
EMBO Molecular Medicine
·
2026
·Vol. 18
·期 5
·1679
·
IF 7.9
Yufei Wu,Xiaomei Yang,Yu Bai,Chenze Li,Peng Wang,Qing Xu,Hui Li,Xiaoli Rao,Yangkai Xu,Jie Chen,Huanhuan Cao,Qi Zhang,Mingming Zhao,Rui Zhan,Xue Fan,Yuedong Hou,Jie Liu,Hong S Lu,Tianyun Wang,Wei Dong Gao,Linzhang Huang,Han Xiao,Lingyun Zu,Alan Daugherty,Mingguo Xu,Lemin Zheng
Cardiac microvascular endothelial cells (CMECs) dysfunction is a well-recognized mediator of heart failure with preserved ejection fraction (HFpEF), but the underlying mechanism remains unclear. Here we find that scavenger receptor class B type I (SR-B1) is predominantly expressed in CMECs and decreased significantly in HFpEF. Endothelial-specific SR-B1 deficiency exacerbates cardiac pathological remodeling and diastolic dysfunction in HFpEF, which can be prevented by endothelial SR-B1 reconstitution through adeno-associated virus serotype 1 (AAV1)-mediated delivery in endothelial-specific SR-B1-deficient mice. Single-cardiac-endothelial-cell transcriptomics and lineage-tracing system reveal that inflammatory CMECs subcluster activation is responsible for the deteriorating HFpEF progression induced by endothelial SR-B1 loss, rather than endothelial-to-mesenchymal transition. Mechanistically, SR-B1 loss drives increased CXCL10 secretion, which orchestrates CMECs activation and CXCR3-positive T-cell cardiotropism to promote diastolic dysfunction—a process associated with endothelial IRF1 activation. Most importantly, the SR-B1-CXCL10-CXCR3 axis is activated in human HFpEF cardiac tissue, and the elevated CXCL10 level in plasma is independently associated with a higher HFpEF prevalence. This study uncovers that activation of the SR-B1–CXCL10-CXCR3 axis in CMECs aggravates HFpEF pathogenesis through the accumulation of CXCR3-positive T-cells in hearts. This study demonstrates that SR-B1 deficiency in cardiac microvascular endothelial cells (CMECs) exacerbates heart failure with preserved ejection fraction (HFpEF) by driving the CXCL10-CXCR3 signaling, thereby linking inflammatory CMEC activation to CXCR3 + T-cell recruitment. This study demonstrates that SR-B1 deficiency in cardiac microvascular endothelial cells (CMECs) exacerbates heart failure with preserved ejection fraction (HFpEF) by driving the CXCL10-CXCR3 signaling, thereby linking inflammatory CMEC activation to CXCR3 + T-cell recruitment.
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DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2026
·
IF 6.4
Nan Wang,Ge Chen,Zhenyun Li,Qizhao Xia,Jie Xin,Chi Zhang
D. officinale cellulose was extracted and oxidized into nanofibrils. • CNFs and zein formed nanostructured W/O/W Pickering delivery systems. • Higher oil fractions enhanced emulsion viscoelasticity and gel networks. • The delivery nanosystems protected Sal B for targeted oral delivery. This study developed novel W/O/W Pickering double emulsions (PDEs) stabilized by Dendrobium officinale Kimura et Migo-derived cellulose nanofibrils (CNFs) and zein nanoparticles (ZNPs) for the delivery of salvianolic acid B (Sal B). CNFs were obtained via TEMPO oxidation, forming a highly extended, interwoven nanoscale network. Driven by electrostatic, hydrogen-bonding, and hydrophobic interactions, CNFs and ZNPs (1:2) co-assembled at pH 4.0. This assembly enabled the one-step fabrication of W/O/W PDEs, as confirmed by optical and confocal laser scanning microscopy. The emulsion droplets remained uniformly distributed and highly stable over a 30-day storage period. Rheological analyses showed that increasing the oil fraction from 50% to 70% induced pronounced elastic gel behavior and enhanced system viscoelasticity. These higher lipid fractions effectively reduced free fatty acid release during simulated in vitro gastrointestinal digestion. More importantly, the construct successfully protected Sal B from premature degradation, enabling its release in the gut. These results highlight the potential of D. officinale cellulose as a sustainable plant stabilizer and establish a nanocellulose-based formulation platform for plant bioactive compounds in pharmaceutical and industrial applications. Download: Download high-res image (236KB) Download: Download full-size image
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DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 5
·1-9
·
IF 5.7
Li Xinxin,Zhang Meiling,Zhang Hua,Wang Zhenxin,Zhang Huimao
A simple fluorescence resonance energy transfer (FRET) sensing platform (termed as USP), comprised of upconversion nanoparticles (UCNPs) as the energy donor and Cy5 as the energy acceptor, has been synthesized for cathepsin B (CTSB) activity detection in vitro and in vivo. When Cy5-modified peptide substrate (peptide-Cy5) of CTSB is covalently linked on the surface of UCNPs, the FRET between the UCNPs (excitation: 980 nm; emission: 541 nm/655 nm) and Cy5 (excitation: 645 nm) leads to a reduction in the red upconversion luminescence (UCL) signal intensity of UCNPs. Cy5 can be liberated from UCNPs in the presence of CTSB through the cleavage of peptide-Cy5 by CTSB, leading to the recovery of the red UCL signal of UCNPs. Because the green UCL signal of UCNPs remains constant during the CTSB digestion, it can be considered as an internal reference. The findings demonstrate the ability of USP to detect CTSB with the linear detection ranges of 1 to 100 ng·mL −1 in buffer and 2 × 10 3 to 1 × 10 5 cells in 0.2 mL cell lysates. The limits of detection (LODs) are 0.30 ng·mL −1 in buffer and 887 cells in 0.2 mL of cell lysates (S/N = 3). The viability of USP to detect CTSB activity in tumor-bearing mice is has further been investigated using in vivo fluorescent imaging. Graphical abstract
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产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
·
IF 6.6
Xiuhua Sun,Shanshan Pan,Zhiren Guo,Yingxin Cui,Liang Ma,Xiaosong Yu,Taijiang Gui,Shougang Chen,Yan Liu,Changlu Gao
In this study, cationic amphiphilic copolymers of poly(hexadecyl methacrylate)-b-poly(carboxybetaine methacrylate ester) (PHMA-b-PCBMAE) with hydrophobic unit of 100 were synthesized, which can be self-assembled as core-shell nanoparticles with PCBMAE as core and PHMA as shell in chloroform . In response to the change of solvent polarity from chloroform to methanol, the reversion ability of core-shell structure occurred to cationic amphiphilic polymers of PHMA 100 -b-PCBMAE 40 , PHMA 100 -b-PCBMAE 50 , PHMA 100 -b-PCBMAE 75 and PHMA 100 -b-PCBMAE 100 in an ascending order, which was verified by 1 H NMR results. Coatings embedded with the cationic copolymers with PHMA:PCBMAE block ratios of 100:75 and 100:100 showed remarkably decreased water contact angle and protein adsorption amount due to the resulted zwitterionic copolymers upon hydrolysis in aqueous solution. Moreover, dynamic recording of the bactericidal activity against E. coli and S. aureus showed that it took ∼18 h for the copolymers PHMA 100 -b-PCBMAE 75 and PHMA 100 -b-PCBMAE 100 to take effect in bacteria killing and foulant repelling, and the bacteria left on the coating surfaces were <1.0 % in 24 h. The bactericidal results were in good accord with the trend of the nanoparticle reversion ability, indicating that higher PCBMAE contents of the cationic diblock copolymer facilitated core-shell reversion and subsequent hydrolysis to zwitterionic copolymer. Moreover, the regenerable surfaces of the coating furtherly ensured the sustainable bactericidal and antifouling activities.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Shanhai Zhao,Yidan Luo,Chunhe Li,Kuankuan Ren,Yanyan Zhu,Weidong Dou
The synthesis of renewable fuel by CO 2 reduction is a promising research direction. The CO 2 reduction reaction may be promoted using photothermal catalysis to achieve efficient CO 2 conversion under mild conditions. In this context, designing efficient catalysts is urgent. In this work, ABO 3 (A = La, Ce; B = Ni, Co, Fe) perovskite catalysts were prepared by coprecipitation and calcination . Experimental results show that the A-site ions and B-site ions in ABO 3 perovskite nanomaterials have a great influence on their structure and photothermal catalytic performance. Among them, the LaNiO 3 catalyst shows excellent photothermal catalytic performance in the conversion of CO 2 to CO and CH 4 , which can generate 0.16 mmol g −1 h −1 CO and 1.38 mmol g −1 h −1 CH 4 at low CO 2 and H 2 concentrations. For the LaNiO 3 sample, its enhancement of catalytic performance mainly benefits from the largest number of active sites, the fastest carrier transport rate, and a relatively suitable band edge position compared with other catalysts. This study proposes a new method for improving the activity and selectivity of photothermal CO 2 reduction and offers a new direction for the recycling of waste gas.
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DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 3
·608
·
IF 3.9
Jingfei Luan,Wenlu Liu,Guangmin Yang,Bowen Niu,Bingbing Ma
A new photocatalyst In2CdO4was prepared by a solid phase sintering synthesis method at high temperature for the first time in this paper. The In2CdO4/Y2SmSbO7heterojunction (IYH) catalyst was prepared by the solvent thermal method for the first time. The Y2SmSbO7compound crystallized in the pyrochlore-type architecture and cubelike crystal system, and the space group of Y2SmSbO7wasFd3mand the crystal cell parameters of Y2SmSbO7was 9.51349 Å. The band gap width of Y2SmSbO7was 2.63 eV. In2CdO4crystallized with a body centered tetragonal lattice structure which was a tetragonal crystal system with a space group ofI41/amd. The band gap width of In2CdO4was 2.70 eV. After 110 minutes of visible light irradiation (VLGI-110min) with IYH as the photocatalyst, the removal rate (RR) of rhodamine B (RhB) concentration was 100% and the total organic carbon (TOC) concentration RR was 99.71%. The power mechanics invariable k toward RhB consistency and visible light irradiation (VLGI) time with IYH as the photocatalyzer reached 0.03073 min−1. The power mechanics invariable k which was involved with TOC reached 0.03621 min−1. After VLGI-110min, the RR of RhB with IYH as the photocatalyzer was 1.094, 1.174 or 1.740 times higher than that with In2CdO4, Y2SmSbO7or N-doping TiO2(N-TO) as the photocatalyzer, respectively. The results showed that the photocatalytic activity of IYH was the highest compared with In2CdO4, Y2SmSbO7, or N-TO. With appending a trapping agent, the oxidative capability for degrading RhB, which ranged from strong to weak among three oxidative radical groups, was as follows: hydroxyl radicals > superoxide anion > holes. This work provided a scientific basis for the research which resulted in prosperous development of efficient heterojunction compound catalysts.Keywords:Y2SmSbO7;In2CdO4/Y2SmSbO7heterojunction photocatalyst;rhodamine B;dye wastewater;visible light irradiation;photocatalytic activity
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jiajie Cao,Xiaohui Wu,Yongyin Chen,Zhangxin Chen,Ruoruo Jiang,Yanying Zhao,Qinghua Tian,Dan Chen,Shengwei Xiao,Binbin Yu,Yanxian Jin
Multi-element doping support is considered an effective method to improve the electrocatalytic performance of catalysts, but there is a lack of simple and mild methods to prepare catalysts. In this article, dimethylamine borane is used as a heteroatom dopant and a metal-reducing agent at the same time, realizing the co-doping of B and N atoms and the deposition of metal Pd on Ti 3 C 2 through a rapid, one-step hydrothermal method . By exploring the electrocatalytic properties of ethanol oxidation , the Pd/DMAB-Ti 3 C 2 exhibits much higher electrochemically active surface areas, ethanol-oxidated current densities, and electrochemical stability than those of the single-doped and undoped catalysts. And the current densities after 350 redox cycles of Pd/DMAB-Ti 3 C 2 can retain 74.6 % of the maximum capacity. Such different properties can be attributed to the synergy of B and N species in the Ti 3 C 2 introduced by dimethylamine borane, which significantly affects the electron transfer and d band center of supported metal Pd, thus facilitating the progress of the EOR along a favorable pathway. This work provides a new insight into synthesizing the high-performance B and N co-doped supported metal catalyst through a rapid one-step synthesis.
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高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Hao Cheng,Xinyan Li,Chao Huang,Jian Zhu,Ping Wang,Heng Cao,Chongling Feng,Dingxun Ling,Hao Liu,Min Cheng
Commercial molybdenum carbide (Mo 2 C) and ferrous iron (Fe 2+ ) were investigated for the first time to co-catalyze the activation of H 2 O 2 for the treatment of organic contaminants . Compared with traditional Fenton process, the presence of Mo 2 C decomposed hydrogen peroxide (H 2 O 2 ) more effectively and accelerated the conversion of Fe 3+ /Fe 2+ . The Rhodamine B (RhB) degradation rate constant in Mo 2 C/Fe 2+ /H 2 O 2 reached appropriately three times that in Fe 2+ /H 2 O 2 , and the co-catalytic reactivity of Mo 2 C was significantly higher than that of MoS 2 . In addition, Mo 2 C/Fe 2+ /H 2 O 2 exhibited a board effective pH range of 2.8–8.8, and four-cycle experiments confirmed the stability and reusability of Mo 2 C. The results of X-ray photoelectron spectroscopy (XPS) indicated that Mo(Ⅱ) and Mo(IV) played major roles in Fe 3+ reduction. Electron Paramagnetic Resonance analysis and quenching experiments demonstrated that hydroxyl radical (·OH), superoxide anion radical (O 2 − ) and singlet oxygen radical ( 1 O 2 ) were all involved in Mo 2 C/Fe 2+ /H 2 O 2 . Particularly, Mo 2 C/Fe 2+ /H 2 O 2 significantly enhanced the generation of ·OH and 1 O 2 in comparison to Fe 2+ /H 2 O 2 . Moreover, toxicity assessment analysis by ECOSAR suggested that the toxicity of most degradation products of RhB decreased after treatment. Overall, this study offers a promising Mo 2 C co-catalyzed Fenton process for rapid and efficient abatement of organic contaminants.
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高影响因子
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