JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 24
·52335
·
IF 3.057
Hao Zhang,Ying Jun Li,Jun Zeng,Hui Ping Liu,Yuan Lin Zhou
In order to solve the problem of poor thermal conductivity of polymer-based radiation shielding composite materials, h-BN@PDA@PbWO 4 hybrid powders were prepared by combining h-BN with high thermal conductivity and PbWO 4 with γ shielding. With the assistance of polydopamine, PbWO 4 particles were synthesized in situ on the h-BN surface. The effects of h-BN@PDA@PbWO 4 on thermal conductivity, γ-ray shielding, and mechanical properties of chloroprene rubber were studied. The results showed that the hybrid particles had better dispersibility than the pure mixing of h-BN and PbWO 4 in chloroprene rubber and significantly improved the thermal conductivity gamma-ray shielding performance and mechanical properties of CR composites. When the filler content of the hybrid powder reaches 40 wt%, the thermal conductivity of the composite is about 3.16 times that of the pure CR. The γ shielding rates at 86.5 KeV and 105.3 KeV photon energies increase by 14.14% and 17.61% compared with the pure CR. Compared with pure CR, the tensile strength of the composites increased by 4.79 MPa, and the elongation at break decreased slightly. These were because h-BN@PDA@PbWO 4 shows had an excellent synergistic effect in CR substrate. The new kind of CR/h-BN@PDA@PbWO 4 composite can be used for thermal management and gamma shielding.
✓ 已验证
DOI
高影响因子
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2017
·
IF 0.809
Huili Ma,Shuyun Liu,Shaohua Zhu,Wenzhu Bi,Xiaolan Chen,Yufen Zhao
Display full size
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Li-Lei Zhang,Xing-Yu Liu,Yu-Lan Wang,Ying Li,Xiao-Ge Zhu,Rong-Hui Cao,Hui-Ju Zhang,Xi-Yan Dong,Jian-Hua Qin
The development of efficient and stable photocatalysts for solar-driven hydrogen production remains a significant challenge, primarily limited by inadequate light harvesting and rapid charge recombination. This work addresses these issues through the rational design of a host-guest system within a metal-organic framework (MOF). We report a novel two-dimensional anionic porphyrinic MOF ( 1 ) synthesized using 1-butyl-3-methylimidazolium (BMI) as a structure-directing agent, and replaced the inert BMI guests with photoactive 4,4-Difluoro-8-(1-methylpyridin-4-ium-4-yl)-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene (Bodipy)-based cations by cationic exchange strategy, yielding the composite Bodipy@1 . The Bodipy units act as complementary antennas, broadening the visible-light absorption range, while the favorable energy-level alignment between the porphyrinic host (donor) and the Bodipy guest (acceptor) establishes an efficient intramolecular charge-transfer pathway. Density functional theory calculations and spectroscopic studies confirm a spatial separation of frontier orbitals, with the highest occupied crystal orbital localized on the porphyrin linker and the lowest unoccupied crystal orbital on the Bodipy cation, which effectively suppresses charge-carrier recombination. Consequently, Bodipy@1 exhibits a remarkable enhancement in photocatalytic hydrogen evolution activity (∼2.5 mmol·g −1 ·h −1 ), outperforming the pristine MOF 1 . This work highlights a potent strategy of energy-level engineering via host-guest assembly, demonstrating that precise post-synthetic modification of anionic MOFs with functional cations is a powerful avenue for designing advanced, stable photocatalysts for solar fuel production. A 2D anionic porphyrinic MOF host undergoes post-synthetic cation exchange, replacing inert [BMI] + with photoactive Bodipy cations. The favorable energy-level alignment drives intramolecular electron transfer from the porphyrin linker (donor) to the Bodipy guest (acceptor), achieving spatial charge separation. This, combined with broadened light absorption, leads to significantly enhanced photocatalytic H₂ evolution. Download: Download high-res image (140KB) Download: Download full-size image
✓ 已验证
DOI
PubMed
高影响因子
Small
·
2026
·
IF 11.8
Jiacheng Zheng,Yulong Deng,Wenting Chen,Chengliao Deng,Xiaoming Cai,Jinming Cai,Honglin Tan
Zinc indium sulfide (ZnIn 2 S 4 , ZIS), a visible-light-responsive photocatalyst, has garnered significant attention due to its facile synthesis, high stability, suitable band gap, and abundant active sites. This study innovatively constructed a CNT@Ag@ZIS tubular structure, introducing Ag mediators as electron donors at the CNT-ZIS interface. Results demonstrate that the Ag mediators establish clear interfacial contact with both hexagonal ZIS and CNT. Consequently, ZIS exhibits markedly enhanced photocurrent response and improved separation efficiency of photogenerated charge carriers. The catalyst achieved a remarkable hydrogen evolution rate of 18.44 mmol g −1 h −1 , representing an 8.7-fold enhancement over pristine ZIS. The study revealed that Ag, with its high Fermi level, facilitates interfacial electron transfer to ZIS. This induces a downshift of the p-band center (3p orbitals of S) in ZIS, simultaneously prolonging the H─S bond length and increasing the antibonding orbital occupation. This electron restructuring creates electron-rich S (2+δ)− active sites, substantially lowering the H 2 desorption energy barrier. Thus, the surface reaction kinetics of the sulfide are optimized through a regulation strategy targeting antibonding orbitals.
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Hao Yu,Jiakai Shi,Jiaqi Wen,Shi Liu,Jingyu Cai,Linxi Hou
Permittivity is a key parameter characterising the polarisation capacity of a dielectric, and directly influences a material’s signal transmission and energy storage properties. As electronic devices evolve towards higher frequencies and greater integration, there is an increasing demand for polymer materials that combine low dielectric constant with excellent thermal and environmental stability. In this study, a aluminium-based metal-organic framework material CAU-10-H, which exhibits negative thermal expansion, was synthesised using the hydrothermal method and incorporated into PEEK matrix by hot-press to prepare CAU-10-H/PEEK composite films. The as-obtained CAU-10-H is relatively well dispersed within the PEEK matrix at low-to-moderate filler loadings, while its incorporation is associated with a reduction in the dielectric constant of the composite. The reduced dielectric response is mainly attributed to the introduction of low-polarity nanoporous domains, while the increase in free volume fraction may also contribute to this behaviour. When the filler content is 5 wt%, the composite exhibits a low die This may be attributed to the following factors:lectric constant across the 2–18 GHz frequency range, with an average value as low as 2.45, whilst the thermal decomposition temperature is above 500℃. In addition, this composite material offers moisture resistance, excellent dimensional stability, outstanding frequency stability and good signal integrity. This study provides new insights into the regulation of the high-frequency dielectric properties and stability of polymer composites using microporous materials with negative thermal expansion characteristics. Download: Download high-res image (181KB) Download: Download full-size image Owing to the inherent microporous structure of MOFs and their interaction with the polymer matrix, this composite material achieves a dual reduction in both the dielectric constant and dielectric loss at high frequencies, whilst exhibiting excellent thermal stability and superior moisture resistance.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Shuai Wang,Yue Gu,Yu Feng,Ziru Zhao,Shufeng Shen
Nonaqueous amine-based absorbents offer advantages over aqueous monoethanolamine (MEA), but they inevitably evolve into water-lean systems when treating humid flue gas, presenting a challenge for long-term performance stability. In this work, a formulated water-lean absorbent, 50B-40BE-10 W, was evaluated for CO 2 capture from simulated humid flue gas in an upgraded lab-scale continuous plant over 720 h, benchmarking it against 30 mass% MEA. Key operational parameters and water balance behavior were systematically investigated to inform rational process design. Under a framework of absorbent-tailored regeneration strategy coupled with dynamic water-balance control, the 50B-40BE-10 W solvent achieved a remarkably low desorber heat duty, about 50–65% reduction compared to MEA. Critically, a dynamic water-management strategy was proposed and demonstrated, involving controlled discharge of desorber overhead condensate following a membrane dehydration process. This approach successfully maintained stable water content of ∼10 wt% in the solvent over a 100-h period, effectively addressing the challenge of water accumulation in water-lean systems. Furthermore, NMR analysis of the absorbent after ∼1700 h of operation, even under high‑oxygen exposure, indicated no catastrophic degradation. The compelling performance and stability demonstrated at the bench-scale pave a solid pathway for further development of this advanced water-lean capture technology.
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2023
·
IF 12.9
Jie Li,Zhen Li,Jing Dong,Renbo Fang,Yingnan Chi,Changwen Hu
The targeting cleavage of lignin into value-added aromatic monomers has attracted increasing attention. Although the base-catalyzed depolymerization of lignin has been developed, the use of excess corrosive bases and their poor recyclability limit their industrial implementation. Herein, a catalytic amount of solid base K7HNb6O19 (KNb6) coupled with copper-modified graphitic carbon nitride (Cu/C3N4) shows enhanced catalytic performance for the oxidative cleavage of β-O-4 lignin linkages using molecular oxygen. Due to the synergetic effect between KNb6 and Cu/C3N4, 96% of the β-O-4 ketone model was converted under relatively mild conditions, and phenol (yield: 90%) and other aromatic monomers (yield: 90%) were obtained. Moreover, KNb6–Cu/C3N4 is robust, and its catalytic activity is basically maintained after five cycles. Experimental and theoretical studies (spectroscopic analysis, control experiments, kinetic study, density functional theory calculations, etc.) reveal that the surface basic O atoms of KNb6 can simultaneously activate the Cβ–H bond of β-O-4 ketone to promote the insertion of molecular oxygen, and subsequently, Cu/C3N4 catalyzes the selective cleavage of the Cα–Cβ bond. The catalysts were also active for the oxidative cleavages of other lignin models and oxidized organosolv lignin.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhuo Tian,Jianning Lu,Xiaowei Feng,Bo Feng,Cuicui Yin,Yingfei Lin,Juan Wang
h-BN is a two-dimensional ceramic material with a lamellar structure , known for its typical orientation characteristics on mechanical and thermal properties. By optimizing the size and arrangement of h-BN grains in the matrix, the anisotropic characteristics of h-BN ceramics can be fully utilized to obtain ceramic materials with high thermal conductivity or high strength . In order to study the effect of grain orientation distribution on the mechanical and thermal properties of materials, the index of orientation distribution (IOP) was used to quantitatively characterize the orientation degree of h-BN grains and analyzed the effect of h-BN grain size on material properties . The results show when the initial h-BN size is 13.50 μm, the ceramic has the highest orientation degree/-507, and the mechanical and thermal properties show obvious anisotropy. While the related properties of BN-YAG ceramics varies significantly with the decrease of initial h-BN grain size.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Pharmacology
·
2023
·
IF 5.6
Li Jingyan,Wu Bingmin,Zeng Lishan,Lin Ying,Chen Qiuhe,Wang Haixia,An Lin,Zhang Jiajun,Chen Siyan,Huang Junying,Zhan Ruoting,Zhang Guifang
Background: The present study aimed to investigate the protective effect of the water extract of Amydrium sinense (Engl.) H. Li (ASWE) against hepatic fibrosis (HF) and clarify the underlying mechanism.Methods: The chemical components of ASWE were analysed by a Q-Orbitrap high-resolution mass spectrometer. In our study, an in vivo hepatic fibrosis mouse model was established via an intraperitoneal injection of olive oil containing 20% CCl4. In vitro experiments were conducted using a hepatic stellate cell line (HSC-T6) and RAW 264.7 cell line. A CCK-8 assay was performed to assess the cell viability of HSC-T6 and RAW264.7 cells treated with ASWE. Immunofluorescence staining was used to examine the intracellular localization of signal transducer and activator of transcription 3 (Stat3). Stat3 was overexpressed to analyse the role of Stat3 in the effect of ASWE on HF.Results: Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses showed that candidate targets of ASWE, associated with protective effects against hepatic fibrosis, were related to inflammation response. ASWE ameliorated CCl4-induced liver pathological damage and reduced the liver index and alanine transaminase (ALT) and aspartate transaminase (AST) levels. ASWE also decreased the serum levels of collagen Ⅰ (Col Ⅰ) and hydroxyproline (Hyp) in CCl4-treated mice. In addition, the expression of fibrosis markers, including α-SMA protein and Acta2, Col1a1, and Col3a1 mRNA, was downregulated by ASWE treatment in vivo. The expression of these fibrosis markers was also decreased by treatment with ASWE in HSC-T6 cells. Moreover, ASWE decreased the expression of inflammatory markers, including the Tnf-α, Il6 and Il1β, in RAW264.7 cells. ASWE decreased the phosphorylation of Stat3 and total Stat3 expression and reduced the mRNA expression of the Stat3 gene in vivo and in vitro. ASWE also inhibited the nuclear shuttling of Stat3. Overexpression of Stat3 weakened the therapeutic effect of ASWE and accelerated the progression of HF.Conclusion: The results show that ASWE protects against CCl4-induced liver injury by suppressing fibrosis, inflammation, HSC activation and the Stat3 signaling pathway, which might lead to a new approach for preventing HF.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jiali Luo,Jing Cao,Guangrong Ma,Xue Wang,Yu Sun,Cong Zhang,Zhan Shi,Yiqing Zeng,Tao Zhang,Pintong Huang
Sonodynamic therapy (SDT), a noninvasive therapy that relies on sonosensitizers and generates reactive oxygen species (ROS), has attracted considerable attention in the treatment of pancreatic cancer. However, being surrounded by dense stromal barriers, pancreatic cancer exhibits high interstitial fluid pressure (IFP) and hypoxia in the tumor microenvironment (TME), resulting in poor SDT efficacy. Collagenase-loaded hollow TiO2 (Col-H-TiO2) nanoparticles (NPs) capable of degrading stromal barriers and producing sufficient ROS production were synthesized in this study. After administration of NPs in the patient-derived xenograft (PDX) model, ultrasonic irradiation-released collagenase degraded tumor matrix fibers, decreased intratumoral IFP, and enhanced the penetration and retention of NPs within tumor tissues. Moreover, the NPs accumulated within the tumor not only generate abundant ROS under the influence of ultrasound irradiation but also improve intratumoral ultrasound signal, providing ultrasonic imaging-guided highly effective SDT for pancreatic cancer. In conclusion, this research improves the SDT technique and enhances the visualization of pancreatic cancer by remodeling the TME and is a promising strategy for further clinical applications.
✓ 已验证
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 13
·1779-1787
·
IF 8.683
Xiaoming An,Jie Liu,Jia-Han Zhang,Xinxin Huang,Tangsong Zhu,Hongping Yan,Xudong Jia,Qiuhong Zhang
Elastomers possessing good mechanical strength and self-healing capability are showing great importance in stretchable electronics, since they can play the role of robust substrates for devices, and prolong the service life of devices. However, it is hard to balance the trade-off between the high mechanical strength and self-healing ability. Here we propose the synergetic strategy via combining thio-β-diketone-Cu2+ metal–ligand (M–L) coordination with hydrogen bonds in one system, through which high mechanical strength, good elasticity and self-healing ability are achieved. The elastomer displays excellent mechanical performances (with a fracture strength of 4.35 MPa and a fracture strain of 3400%). Meanwhile, the elastomer can realize a high self-healing efficiency (94%) within only 3 hours at 80 °C. X-ray absorption fine structure (XAFS) analysis demonstrates the reconfiguration of M–L coordination at the molecular level, and small angle X-ray scattering (SAXS) during stretching demonstrates the microphase structure change of the polymer at the nanoscale level. Based on the elastomer, a self-healable pressure sensor and a self-healable strain sensor are fabricated.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 17
·6449-6464
·
IF 8.307
Ziwei Yuan,Bin Wang,Yilong Teng,William Ho,Bin Hu,Kofi Oti Boakye-Yiadom,Xiaoyang Xu,Xue-Qing Zhang
Gene therapy holds tremendous potential for the treatment of incurable brain diseases including Alzheimer's disease (AD), stroke, glioma, and Parkinson's disease. The main challenge is the lack of effective gene delivery systems traversing the blood–brain barrier (BBB), due to the complex microvessels present in the brain which restrict substances from the circulating blood passing through. Recently, increasing efforts have been made to develop promising gene carriers for brain-related disease therapies. One such development is the self-assembled heavy chain ferritin (HFn) nanoparticles (NPs). HFn NPs have a unique hollow spherical structure that can encapsulate nucleic acid drugs (NADs) and specifically bind to cancer cells and BBB endothelial cells (BBB ECs) via interactions with the transferrin receptor 1 (TfR1) overexpressed on their surfaces, which increases uptake through the BBB. However, the gene-loading capacity of HFn is restricted by its limited interior volume and negatively charged inner surface; therefore, these drawbacks have prompted the demand for strategies to remould the structure of HFn. In this work, we analyzed the three-dimensional (3D) structure of HFn using Chimera software (v 1.14) and developed a class of internally cationic HFn variants (HFn+ NPs) through arginine mutation on the lumenal surface of HFn. These HFn+ NPs presented powerful electrostatic forces in their cavities, and exhibited higher gene encapsulation efficacy than naive HFn. The top-performing candidate, HFn2, effectively delivered siRNA to glioma cells after traversing the BBB and achieved the highest silencing efficacy among HFn+ NPs. Overall, our findings demonstrate that HFn+ NPs obtained by this genetic engineering method provide critical insights into the future development of nucleic acid delivery carriers with BBB-crossing ability.
✓ 已验证
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）