COMPOSITES SCIENCE AND TECHNOLOGY
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2020
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IF 7.094
Kai Yin,Qing Xie,Haoou Ruan,Qijun Duan,Fangcheng Lü,Xingming Bian,Tian Zhang
Composite dielectrics with high vacuum insulation properties are integral to today's advanced energy transmission. In this study, 5% mol Yttrium doped BiFeO 3 sub-particles were synthesized by a facile sol-gel route and then were blended with epoxy resin as filler to prepare the epoxy composites (BY5FO/EP) with a wide range of filler content . The multi-electrical investigations were employed, and the results show the BY5FO/EP composites present ultra-high surface insulation performance. As the concentration of filler increases, the dielectric constant of the BY5FO/EP composites exhibited sine-shaped variations. Considering the multiple-layers of filler particles , we determined the dielectric model of composites for a wide range of filler contents by simulation. Meanwhile, the trap depths of BY5FO/EP composites were calculated according to Isothermal Surface Potential Decay, and we found the trapping stability is of sinusoidal relevance with the filler content. The simultaneous sine-variations of dielectric polarization and trap depth lead to the vacuum surface breakdown strength of the composite increased by 111% with the optimal filler content. The results in this paper provide a prospective strategy to realize ultra-high surface insulation in a vacuum and evidence to the applicability of the Electron Triggered Polarization Relaxation theory.
研究领域:
材料科学
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电气工程
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry Letters
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2026
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IF 4.5
Xinning Wang,Yujie Wen,Di Shen,Maolin Mu,Xiankan Zeng,Chenglong Li,Jianhao Ding,Weiqing Yang,Wen Li
Abstract Formamidinium lead bromide (FAPbBr3) perovskite quantum dots (PeQDs) are promising emitters for next-generation displays owing to their narrow emission, high color purity, and solution processability. However, surface-derived trap states promote nonradiative recombination and charge accumulation, limiting PeQLED performance. Here, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is introduced during PeQD synthesis to regulate surface coordination. Spectroscopy supports coordination of its electron-rich P═O group with undercoordinated Pb2+ sites, thereby suppressing trap-assisted nonradiative recombination. Reduced Urbach energy and comparative space-charge-limited-current trap-density estimates support lower energetic disorder, while frequency-resolved electrical measurements indicate diminished slow charge relaxation and trap-mediated charge accumulation. Consequently, the optimized PeQLED achieves a peak external quantum efficiency of 18.3%, a maximum luminance of 75,180 cd m–2, and a current efficiency of 85.4 cd A–1. These results link molecular surface coordination with nonradiative-loss suppression and dynamic charge regulation, providing a strategy for efficient PeQLEDs.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yi Wang,Huanhuan Guo,Xiaohan Xing,Can Wang,Xuefeng Zhang,Xiumin Li,Fengfeng Gao,Xiaogang Hao
A lithium aluminum iron layered double hydroxides/multiwalled carbon nanotubes/quaternized chitosan (LiAlFe-LDHs/MWCNTs/QCS) composite membrane with lithium-ion vacancies (Li + -trap) was fabricated through vacuum filtration method and pre-desorption process. The Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane had been developed for the selective extraction of Li + within the ship lock-type ion selective permeability (SL-ISP) system. In the Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane, the Li + -trap within LiAlFe-LDHs was pivotal for achieving selective Li + extraction. This selectivity was realized through the cyclic intercalation of Li + into the Li + -trap sites within the interlayer structure of LiAlFe-LDHs, a process that also facilitates the permeation of Cl - . The interference of impurity ions was further eliminated by the SL-ISP system, thus facilitating the selective extraction of Li + . Upon investigation, the Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane was found to achieve a Li + flux of 0.055 mol·m −2 ·h −1 and a separation factor of 8.3 at an equimolar concentration ( C Mg, Li = 0.05 M) within the SL-ISP system. Additionally, the Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane demonstrated excellent separation performance in simulated brine, with a calculated Li + permeation flux of 0.053 mol·m −2 ·h −1 . The separation factors of Li + /Mg 2+ , Li + /K + , Li + /Na + and Li + /Ca 2+ reached values of 91.84, 69.75, 81.51 and 17.99, respectively. Therefore, the Li + -trap LiAlFe-LDHs/MWCNTs/QCS composite membrane could be effectively applied in the SL-ISP system for the selective extraction of Li + .
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2015
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IF 4.169
Yehua Han,Limin Ren,Kai Xu,Fan Yang,Yongfeng Li,Tingting Cheng,Xiaomeng Kang,Chunming Xu,Quan Shi
A supercritical fluid extraction (SFE) method with an online solid collection trap has been developed for the quantitative analysis of 16 polycyclic aromatic hydrocarbons (PAHs) and 15 typical PAH derivatives in solid matrix. Compared with liquid trapping and C18 solid-phase trapping, multi-walled carbon nanotubes (CNTs) were proved to be the most efficient trapping sorbent for the collection of PAHs and their nitro-, oxy- and alkyl-derivatives. The proposed extraction–collection procedure was systematically optimized in terms of pressure, temperature, extraction time, trapping materials, supercritical fluid flow rate, co-solvent type, and co-solvent percentage, taking into account the interaction between these variables. The whole extraction process could be completed in 15 min followed by GC–MS analysis. Quantitative recoveries of PAHs and their derivatives from spiked soil samples (50 ng g −1 ) were obtained in the range of 62.9–111.8% with the precisions (RSD, intra-day) ranged from 1.9% to 13.7%. The developed SFE method with online CNTs trapping followed by GC–MS analysis has been demonstrated to be an efficient way for quantitative analysis of trace-level PAHs and their nitro-, oxy-, and alkyl-derivatives in soil samples.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Lei Zhou,Sai Ma,Meizhen Gao,Boyao Xie,Qi Shi
1,3-propanediol (1,3-PDO) is a high-value chemical that can be produced via glycerol hydrogenolysis or biological fermentation. The main products of glycerol hydrogenolysis include 1,3-PDO and 1,2-propanediol (1,2-PDO). The properties of propanediol isomers are extremely similar, which are difficult to effectively separate them. Based on the differences in the shape of ellipsoidal 1,3-PDO and spherical 1,2-PDO, ZIF-300 with a 6-member ring (6-MR) trap between cha and d6r cages that can match spherical 1,2-PDO have been selected for the separation of propanediol isomers. ZIF-300 series materials (named ZIF-300-S1, ZIF-300-S2 and ZIF-300-S3) with different 6-MR trap orientations have been constructed by variable the ratio between the small-sized 2-methylimidazole (mIm) and large-sized 5-bromobenzimidazole (bbIm) links. Theoretical and experimental results show that ZIF-300-S3 (Zn(mIm) 1.04 (bbIm) 0.96 ) preferentially adsorbed 1,2-PDO over 1,3-PDO because the 6-MR trap with uniform large bbIm/small mIm links distribution faces essentially the small d6r cage, which can better match spherical 1,2-PDO. In contrast, ZIF-300-S1 (Zn(mIm) 0.82 (bbIm) 1.18 ) show low uptake of 1,2-PDO and 1,3-PDO because the 6-MR trap with main large bbIm links distribution faces essentially the larger cha cage, which show weak confinement of 1,2-PDO and 1,3-PDO. The dynamic column adsorption (1,2-PDO/1,3-PDO: 50/50 g L −1 ) results exhibited that the adsorption capacity of ZIF-300-S3 for 1,2-PDO can be as high as 64.7 mg g −1 and selectivity for 1,2-PDO/1,3-PDO was 2.0. This work provides valuable insights into the construction of ZIFs materials with tunable 6-MR trap for effective separation of isomers.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
Science China-Materials
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2025
·
IF 7.4
Chen Wenliang,Zhang Yingze,Zhu Xiaoyu,Miao Junhui,Liu Jun,Wang Lixiang
Near-infrared (NIR) organic photodetectors (OPDs) hold enormous commercial potential in wearable biosensing and imaging applications. However, their sensitivity remains comparatively lower than that of commercially available silicon-based photodetectors (Si PDs). In this study, we present highly sensitive NIR OPDs by incorporating an all-fused-ring small molecule acceptor, FM4, with low trap density into a conventional active layer system. FM4 effectively reduces traps in the active layer, resulting in a decrease in trap density from 1.57 × 10 15 to 8.86 × 10 14 cm −3 . Consequently, under −1 V bias, the OPD device with FM4 as the third component achieves an ultra-low real-measured noise current of 7.56 × 10 −15 A Hz −1/2 at 1 kHz, lower than that of commercial Si PDs, which is primarily attributed to the substantial decrease in trap density within the active layer. Due to its ultra-low noise current, the ternary device exhibits a high specific detectivity of 1.83 × 10 13 Jones at 840 nm under −1 V bias and a broad linear dynamic range of 155 dB. Its sensitivity exceeds that of Si PDs. Furthermore, this sensitive OPD device has been successfully utilized in single-pixel low-light imaging, delivering superior image clarity compared to Si PDs.
研究领域:
材料科学
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光学工程
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Shuyan Xu,Pengfeng Zhu,Caiqin Wang,Daoyong Zhang,Ming Zhang,Xiangliang Pan
The behavior and fate of PFOS (perfluorooctanesulfonate) in the aquatic environment have received great attention due to its high toxicity and persistence. The nanoscale supramolecular mechanisms of interaction between PFOS and ubiquitous EPS (exopolymers) remain unclear though EPS have been widely-known to influence the bioavailability of PFOS. Typically, the exposure patterns of PFOS in aquatic animals changed with the EPS-PFOS interaction are not fully understood. This study hypothesized that PFOS exposure and accumulation pathways depended on the PFOS-EPS interactive assembly behavior and animal species. Two model animals, zebrafish and chironomid larvae, with different feeding habitats were chosen for the exposure and accumulation tests at the environmental concentrations of PFOS in the absence and presence of EPS. It was found that PFOS triggered the self-assembly of EPS to form large aggregates which significantly trapped PFOS. PFOS accumulation was significantly promoted in zebrafish but drastically reduced in chironomid larvae because of the nanoscale interactive assembly between EPS and PFOS. The decreased dermal uptake but increased oral uptake of PFOS by zebrafish with large mouthpart size could be ascribed to the increased ingestion of PFOS-enriched EPS aggregates as food. For the chironomid larvae with small mouthpart size, the PFOS-EPS assemblies reduced the dermal, oral and intestinal uptake of PFOS. The nano-visualization evidences confirmed that the PFOS-enriched EPS-PFOS assemblies blocked PFOS penetration through skin of both animals. These findings provide novel knowledge about the ecological risk of PFOS in aquatic environments.
研究领域:
环境科学
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Acta Biomaterialia
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2022
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IF 10.633
Feng Li,Liming Lin,Jiaying Chi,Hui Wang,Minqun Du,Disang Feng,Liqing Wang,Rui Luo,Hangping Chen,Guilan Quan,Jianfeng Cai,Xin Pan,Chuanbin Wu,Chao Lu
Focal bacterial infections are often difficult to treat due to the rapid emergence of antibiotic-resistant bacteria, high risk of relapse, and severe inflammation at local lesions. To address multidrug-resistant skin and soft tissue infections, a bacteria-absorbing sponge was prepared to involve a “trap-and-kill” mechanism. The system describes a guanidinium-rich lipopeptide functionalized lyotropic liquid-crystalline hydrogel with bicontinuous cubic networks. Amphiphilic lipopeptides can be spontaneously anchored to the lipid-water interface, exposing their bacterial targeting sequences to enhance antibacterial trapping/killing activity. Computational simulations supported our structural predictions, and the sponge was confirmed to successfully remove ∼98.8% of the bacteria in the medium. Release and degradation behavior studies indicated that the bacteria-absorbing sponge could degrade, mediate enzyme-responsive lipopeptide release, or generate ∼200 nm lipopeptide nanoparticles with environmental erosion. This implies that the sponge can effectively capture and isolate high concentrations of bacteria at the infected site and then sustainably release antimicrobial lipopeptides into deep tissues for the eradication of residual bacteria. In the animal experiment, we found that the antibacterial performance of the bacterial-absorbing sponge was significant, which demonstrated not only a long-term inhibition effect to disinfect and avoid bacterial rebound, but also a unique advantage to protect tissue from bacterial attack. Statement of significance Host defense peptides/peptidomimetics (HDPs) have shown potential for the elimination of focal bacterial infections, but the application of their topical formulations suffers from time-consuming preparation processes, indistinctive toxicity reduction effects, and inefficient bacterial capture ability. To explore new avenues for the development of easily prepared, low-toxicity and high-efficiency topical antimicrobials, a guanidinium-rich lipopeptide was encapsulated in a lyotropic liquid-crystalline hydrogel (denoted as “bacteria-absorbing sponge”) to achieve complementary superiorities. The superior characteristic of the bacteria-absorbing sponge involves a “trap-and-kill” mechanism, which undergoes not only a long-term inhibition effect to disinfect and avoid bacterial rebound, but also effective bacterial capture and isolating action to confine bacterial diffusion and protect tissues from bacterial attack.
研究领域:
药学
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微生物学
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材料科学
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Gulizhabaier Abulipizi,Zimin Yu,Shaochen Lin,Nan Zhang,Fang Xu,Xin Wang,Zhanjun Li
Chromium-doped persistent luminescence nanoparticles (PLNPs) have promising biomedical applications in X-ray charged near-infrared (NIR) luminous imaging. The persistent luminescence (PersL) property was usually adjusted by co-doping with other ions. Impurity phases were thought to be adverse to the PersL. In this study, a composite material, LiInSi 2 O 6 :Cr,Pr·2SiO 2 (LICP-S), was synthesized with a PersL peak at 800 nm after being charged by 1 Gy X-ray while LiInSi 2 O 6 :Cr (LIC) and LiInSi 2 O 6 :Cr,Pr (LICP) possessed no or very weak PersL. Distinctively, excess metastable cristobalite silica was found essential for the much more intense PersL of LICP-S than LICP and LIC. Thermostimulated luminescence spectra studies indicated that cristobalite adjusted the Pr-related traps from deep traps to shallow ones, which facilitated the room temperature PersL. The low dose X-ray charged PersL of LICP-S was applied to demonstrate the luminous labeling of a medical silicone prosthesis that was supposed to be imbedded in body for years via X-ray activated PersL imaging in vitro and in vivo . This work not only provides a kind of PLNPs with 800 nm emission suitable for low dose X-ray activation, but also an unusual strategy for trap engineering in PersL materials by designing multi-phase composites.
研究领域:
材料科学
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生物医学工程
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医学影像学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2026
·
IF 6.1
Manman Wu,Wenwei Qiu,Yuliang Su,Wei-Wei Zhao,Ninghui Song,Bin Hu,Guangxu Chen
Background Volatile organic compounds (VOCs), ubiquitous aquatic pollutants, have garnered global attention due to their potential threats to aquatic organisms and human health. While purge-and-trap (P&T) with gas chromatography-mass spectrometry (GC-MS) is the standard detection method, commercial systems face limitations in detection limits and contamination resistance due to sorbent traps. This study developed an adsorbent-free ultra-low-temperature P&T system using Stirling cryogenic refrigeration technology, integrated with fully automated online sampling and quality control modules, thereby establishing a robust GC-MS monitoring platform. Results The developed system achieves quantitative VOC capture at −120°C without adsorbent materials, eliminating trap degradation and cross-contamination. Comprehensive validation using 56 representative VOCs demonstrated exceptional analytical performance in full-scan data acquisition mode: linear dynamic range of 0.1–10 μg L −1 (R 2 > 0.9975), method detection limits (MDLs) of 0.005–0.016 μg L −1 , precision of 2.0–5.2% (RSD, n = 6), and trueness of 86.9–115.7% (recovery). A 15-day continuous field validation in real drinking water sources confirmed system robustness (recoveries ranging from 70.0% to 130.0% for 94.6% of all target compounds). Significance This adsorbent-free approach differs from conventional adsorption-based methods by relying on condensation for VOC enrichment. It achieves detection limits more than five times lower than China's standard GB/T 5750.8-2023 method (0.055-0.365 μg L −1 ) while avoiding carryover contamination and adsorbent-related maintenance. By eliminating consumable trap packing and supporting autonomous operation through integrated QC protocols, the system reduces operational costs and personnel requirements. These characteristics make the technology suitable for unattended, long-term online monitoring in complex environmental matrices, providing a practical option for real-time surveillance of hazardous VOCs in remote water sources and facilitating rapid response to episodic pollution events.
✓ 已验证
DOI
高影响因子
Innate Immunity
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2024
·
IF 2.8
Yiqin Shu,Rui Yang,Huijie Wen,Qiannan Dong,Zhiqi Chen,Yang Xiang,Hao Wu
Rheumatoid arthritis (RA) is a chronic disease characterized by joint inflammation and severe disability. However, there is a lack of safe and effective drugs for treating RA. In our previous study, we discovered that myricetin (MC) and celecoxib have a synergistic effect in the treatment of RA. We conducted in vitro and in vivo experiments to further investigate the effects and mechanisms of action of MC. Our findings demonstrated that MC treatment effectively reduced the release of neutrophil extracellular traps (NETs) and alleviated the inflammatory response in RA. Mechanistic studies showed that MC prevents the entry of PADI4 and MPO into the cell nucleus, thereby protecting DNA from decondensation. In a rat arthritis model, MC improved histological changes in ankle joints and suppressed NET-related signaling factors. In conclusion, MC protects the ankle joints against arthritis by inhibiting MPO and PADI4, thereby reducing NET release. The pharmacological mechanism of MC in RA involves the inhibition of NET release.
研究领域:
药理学
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免疫学
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风湿病学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2018
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IF 4.908
Chunfeng Li,Yufeng Duan,Hongjian Tang,Chun Zhu,Yiwu Zheng,Tianfang Huang
A novel calcium-based sorbent was synthesized from calcium acetate and mesoporous silica through chemical impregnation method. The Brunauer-Emmett-Teller (BET) and scanning electron microscope (SEM) analysis revealed that the sorbent possessed a good surface structure as the calcium salt decomposed to calcium oxide (CaO) through multiple calcination steps. The mercury adsorption performance of the sorbent was investigated in a fixed bed system, the results showed that the sorbent has an obvious penetration behavior for gaseous element mercury (Hg 0 (g)) while completely adsorbed reactive gaseous mercury (Hg 2+ (g)) under the pure nitrogen and simulated flue gas atmosphere. On-site sampling test of the calcium-based sorbent traps was ultimately conducted on a 600 MW coal-fired power plant. The Ontario Hydra Method (OHM) was chosen as the reference method to evaluate the accuracy of the sorbent traps sampling results. The measured data obtained by sorbent traps was well consistent with OHM under the selected operational load and all the sorbent traps passed the QA/QC criteria, show that the sorbent traps performed with almost the same accuracy as OHM. The mercury emission and removal characteristics across the existing air pollution control devices (APCDs) were reported based on the sorbent traps sampling results. With the help of SCR for the Hg 0 oxidation, ESP for the removal of Hg 2+ and Hg p , and the good water solubility of Hg 2+ in WFGD, the combination of SCR + ESP + WFGD achieved an excellent mercury removal efficiency with the value of 88.54%. The final mercury emissions from the exhaust were 3.75 μg/m 3 and meet the emission requirements of China.
研究领域:
环境科学
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污染控制工程
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能源工程
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分析化学
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材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）