COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.2
Yumeng Ren,Jing Lin,Rui Zhang,Tiantian Deng,Menglin Chen,Chao Yu,Chengchun Tang,Yang Huang
Advanced thermal protection systems require ultralight, robust, thermally insulating, and ablation‑resistant composites. While promising, the three-dimensional (3D) skeleton/matrix design is challenged by fabricating an ideal skeleton with structural continuity, high‑temperature stability, interfacial compatibility, and scalability. Herein, we fabricate composite aerogels using an internally porous boron nitride (BN) fiber‑based 3D aerogel as the reinforcing skeleton and a phenolic (PF) aerogel as the matrix. The resulting PF/BN composite aerogels exhibit ultralow densities of 0.141–0.167 g/cm 3 . Excellent interfacial compatibility via π‑π interactions and hydrogen bonding ensures efficient stress transfer to the robust BN skeleton, preventing structural collapse during ambient pressure drying (APD) and endowing enhanced mechanical properties: up to 70% compressive strain and compressive strengths of 3.4–7.8 MPa. The aerogels also show outstanding thermal insulation, with the PF/BN2.0 sample exhibiting a low thermal conductivity of 45.3 mW·m −1 ·K −1 . Furthermore, under butane flame ablation (∼1300°C), a 20 mm‑thick PF/BN2.0 maintains a backside temperature of only 370°C after 15 min, and simply attaching it to an aluminum plate enables effective high‑temperature infrared stealth. This performance is attributed to a hierarchical structure formed in situ during ablation, consisting of a dense outer layer and a porous inner layer. This work not only demonstrates the effectiveness of the 3D BN fiber‑based skeleton as a high‑performance reinforcement, but also provides a new strategy for developing lightweight, multifunctional composites for extreme‑environment applications.
✓ 已验证
产品关联
DOI
高影响因子
OPTICS COMMUNICATIONS
·
2026
·
IF 2.7
Riyue Gao,Xiuyu Zhao,Junming Li,Jia Liu,Lan Zhang,Hongyan Meng,Hengli Feng,Wenqiang Shi,Yachen Gao
Room-temperature phosphorescent (RTP) materials have received broad interest for their promising applications in information encryption, bioimaging, and anti-counterfeiting. Carbon dots (CDs), as a new carbon-based luminescent nanomaterial have been found to have multicolor afterglow and ultralong luminescence. In this study, using o-phenylenediamine (OPD) and citric acid (CA) as precursors, carbon dots denoted as OC-CDs were synthesized via a hydrothermal method. The OC-CDs were then embedded into a boric acid (BA) matrix, yielding a carbon dot composite material (denoted as OC-CDs@BA). The composite was chemically characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The phosphorescence properties of the OC-CDs@BA composite were systematically investigated. The study demonstrates that the material exhibits excitation-wavelength-dependent RTP behavior. Under 254 nm excitation, the material exhibits deep-blue phosphorescence at 418 nm with a long phosphorescence lifetime of 1.61 s and a quantum yield of 7.7%; under 365 nm excitation, it switches to green phosphorescence at 533 nm with a lifetime of 201 ms and a quantum yield of 3.25%. Finally, the excitation and time-dependent phosphorescence property of the composite was used in anti-counterfeiting. This work provides a new approach for designing multifunctional RTP carbon dot materials for high-security optical anti-counterfeiting applications.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Zan Tan,Fengping Hou,Xiaojing Yang,Li Yang,Nan Dong
Electrochemical detection of diquat (DQ) herbicide residue faces challenges in achieving the trade-off among selectivity, sensitivity, and stability in complex matrices. To overcome this, we reported a supramolecular electrochemical sensor (P6-TATR/AB/GCE) based on a newly synthesized electron-rich, hydrophobic pillar[6]arene-triazatruxene derivative (P6-TATR) integrated with acetylene black (AB). The sensor leverages the high conductivity and electrocatalytic activity of AB, while P6-TATR enables selective DQ recognition through synergistic electrostatic interaction, host-guest complexation, and competitive adsorption. This synergistic combination facilitates rapid DQ reduction at the electrode interface, enabling high-performance DQ monitoring. The proposed sensor demonstrated a low detection limit (0.784 nM), wide linear range (0.001–16.0 μM), and exceptional specificity against 100-fold interfering pesticides and ions. The sensor exhibited excellent reproducibility, with relative standard deviations (RSD) of 2.43% (intra-day), 2.94% (inter-day), and 3.08% (batch-to-batch). It also demonstrated robust long-term stability, retaining 90.4% of its initial signal after 150 days. Practical application in food and environmental samples yielded satisfactory recoveries (80.0%–116.0%) with RSD ≤ 7.4% ( n = 3), which were corroborated by High Performance Liquid Chromatography (HPLC) validation. The fabricated electrode outperforms existing DQ sensors in selectivity and stability, offering a new strategy for utilizing hydrophobic macrocycles in electrochemical analysis.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Liyang Hu,Chao Wang,Lupeng Shao,Xingxiang Ji,Guihua Yang,Baozhong Lü,Feng Xu,Jiachuan Chen
Achieving high temperature phosphorescence (HTP), particularly using biomass as precursors, is intriguing but faces significant challenges due to the violent non-radiative decay. Here, lignin is converted to carbon dots (L-CD) in the urea-boric acid (UB) matrix through an in situ double matrix confinement strategy. The rigid UB matrix can provide multiple chemical and non-covalent interactions with L-CD, thus the triplet excitons are protected against quenching by strong confinement effect. The L-CD-UB demonstrates outstanding room temperature phosphorescence (RTP) lifetime of 1256.99 ms and quantum yield of 7.43% at ambient environment. Because of the high stability of the triplet excitons and reduced energy gap between singlet state and triplet state, the L-CD-UB shows thermally activated delayed fluorescence (TADF) and high temperature phosphorescence dual emission phenomenon, with a striking phosphorescence lifetime of 304.33 ms at 453 K. The work provides an effective method to achieve HTP of lignin and affords a promising eco-friendly material for high temperature anti-counterfeiting, encryption and smart sensing.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Dongcheng Li,Shenghu Wang,Huanji Song,Xianying Xu,Shihao Yang,Yuyang Dong,Yan Luo,Weiyang Lv
Efficient and sustainable Fenton-like systems are highly desired for degrading persistent pollutants. However, their development is often hindered by the slow redox kinetics and poor durability of single active sites in conventional metal-based catalysts. Herein, we developed a bimetallic Fe/Cu catalyst (FeCu-BN) with highly dispersed metal sites anchored on boron nitride (BN), which offered boosted activity and stability via the cooperative redox cycles between Fe and Cu sites. The FeCu-BN catalyst achieved nearly 100% removal of sulfamethoxazole (SMX) within 20 min through activating peroxymonosulfate (PMS), with a rate constant of 0.421 min − 1 significantly surpassing those of its monometallic counterparts and other advanced catalysts. Systematic experiments and theoretical calculations revealed that the Cu sites not only optimized the electronic structure of the Fe sites but also provided electrons extracted from pollutants to promote the Fe 2+ /Fe 3+ cycle, thereby triggering concerted radical and non-radical reactions for SMX elimination. Consequently, the FeCu-BN/PMS catalytic system operated stably over a wide pH range and exhibited exceptional tolerance to various inorganic ions and complex aqueous matrices. Furthermore, in a continuous flow membrane reactor, the system maintained efficient SMX removal over 20 h without significant performance loss. This work uncovered the synergistic redox cycling mechanism in bimetallic catalysts and offered valuable insights for designing dual-site catalysts for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yusen Xing,Rugeng Liu,Mei Li,Wei Han
To lower the reaction temperature and enhance the waste incorporation rate of ZrSiO 4 , this study developed a novel low-temperature synthesis strategy. MgF 2 was used as a mineralizer to optimize the synthesis of ZrSiO 4 . Ceramics are successfully prepared by sintering at 1000 °C for 6 h. The role of MgF 2 in promoting the reaction is also investigated. At 1000 °C, MgF 2 reacts with SiO 2 to form amorphous Mg 2 SiO 4 . The Mg 2 + ions released in this process promote the phase transformation from m-ZrO 2 to t-ZrO 2 . The t-ZrO 2 then reacts with SiO 4 4- , thereby forming ZrSiO 4 . Under the same conditions, Nd x Zr (1-x) SiO 4 ceramic waste forms are synthesized for the immobilization of Nd 2 O 3 , which simulates high-level radioactive waste. XRD results show that a single-phase zircon structure is maintained when x ≤ 0.35. However, when x > 0.35, a small amount of Mg 2 SiO 4 is detected as a secondary phase. This indicates that some SiO 2 remains unreacted, and part of the Nd 2 O 3 is not incorporated into the crystal structure. Based on these findings, the sample with the maximum solid solution (x = 0.35) is selected and combined with lead-containing borosilicate glass to produce glass-ceramic waste forms. Leaching tests show that the normalized release rate of Nd 3+ gradually decreases as the glass content increases. With a glass content of 90 wt%, the material exhibits outstanding aqueous durability, as evidenced by a negligible Nd 3+ leaching rate of merely 1.57 × 10 −6 g·m −2 ·d −1 after 2 8 days. In conclusion, MgF 2 acts as an effective mineralizer, enabling a substantial reduction in both the synthesis temperature and duration required for ZrSiO 4 formation.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xiaoyu Zhang,Langping Dong,Shaoxing Yang,Qiuyu Yao,Baiqi Shao,Jingshan Hou,Yongzheng Fang
To creating versatile light-emitting materials that enable diverse functionalities, a Mn 4+ -activated La 2 MgNbO 6.5 multifunctional phosphor that exhibits excellent comprehensive performance for applications in plant lighting and optical thermometry was synthesized. The crystal structure and luminescent characteristics were systematically analyzed. The synthesized La 2 MgNbO 6.5 :Mn 4+ shows a broadband excitation band spanning 300-500 nm and delivers far-red emission centered near 708 nm, which overlaps with the P FR phytochrome absorption of plants. Furthermore, the enhancement effect of alkali-metal ions on the performance of La 2 MgNbO 6.5 :Mn 4+ has been investigated. The optimized La 2 MgNb 0.994 O 6.5 :0.006Mn 4+ , 0.003Li + phosphor exhibits remarkable improvements in photoluminescence intensity, external quantum efficiency and thermal stability. Its external quantum efficiency reaches an impressive 50.3%, fully meeting the demands of practical applications. An LED device was fabricated by integrating the optimized La 2 MgNb 0.994 O 6.5 :0.006Mn 4+ , 0.003Li + far-red phosphor with a 410 nm chip. Wheat-seedling cultivation under its illumination demonstrated markedly enhanced stem growth, further validating the phosphor's potential as a far-red-emitting material for indoor plant-growth LED lighting. Meanwhile, the excellent temperature-dependent luminescence behavior of the phosphor also renders it promising for optical thermometry. Its nearly linear response trend enables potential practical applications, yielding a high relative sensitivity of up to 3.3656%·K −1 , and a minimum temperature uncertainty as low as 0.0165 K. The results demonstrate that the Mn 4+ -activated La 2 MgNbO 6.5 multifunctional phosphor possesses broad application prospects in both plant lighting and optical thermometry.
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2026
·
IF 10
Mingkai Wei,Yanjun Hao,Xuejie Zhang,Wei Li,Haoran Zhang,Bingfu Lei
Near-infrared (NIR) phosphor-converted LEDs (pc-LEDs) are critical for smart agriculture and night vision, but their efficiency is limited by low external quantum efficiency (EQE) of phosphors. Herein, the introduction of Al 3+ ions via chemical substitution increased the EQE of the GdGa 2.85 (BO 3 ) 4 :0.15Cr 3+ NIR phosphor from 8.3% to 30.7% (a relative increase of 270%). Importantly, an “absorption-efficiency decoupling” paradigm is identified: while the Al 3+ substitution reduces the absorbance, confirmed by Density Functional Theory, diffuse reflectance spectra, and X-ray photoelectron spectroscopy, the quantum efficiency is significantly increased. Theoretical analyses and spectroscopic evidence suggest that the superior EQE gain stems from Al 3+ -induced crystal field enhancement and subsequent energy level remodeling. This remodeling optimizes the Cr 3+ excited state dynamics by suppressing the non-radiative transitions pathway and increasing the radiative transitions, thus overcoming the detrimental effects of absorption reduction. The optimized phosphor, combined with a blue LED chip, produced an NIR pc-LED achieving 41.7 mW output power and 15.7% photoelectric efficiency at 100 mA. The device successfully demonstrated potential for precision agriculture and night vision. This work provides novel insight into “absorption-efficiency decoupling” and offers a new design strategy for efficient Cr 3+ -doped NIR phosphors.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2026
·
IF 12.1
Zhanmo Zheng,Conglin Dong,Xiuqin Bai,Chengqing Yuan,Tun Cai,Yiwei Wang,Pengfei Jing
Achieving durable lubrication and effective damping, which are essential for suppressing friction-induced vibration and noise, remains a challenge in water-lubricated polymer friction components. In this study, a slippery multi-crosslinked polyvinyl alcohol (PVA) hydrogel (MCPH) was proposed based on PVA as the hydrogel matrix, carboxylated cellulose nanofibers as reinforcing agents, and various reversible interactions as efficient energy dissipation mechanisms. Subsequently, the prepared MCPH was blended with thermoplastic polyurethane (TPU), and a novel TPU/MCPH composite was developed. Friction and vibration experiments demonstrated that the incorporation of MCPH significantly enhanced the aqueous lubrication of the TPU composite, which was attributable to the synergistic effects of the improved hydrophilicity, water absorption/release functions of MCPH, and hydration lubrication. Moreover, the reversible interactions within MCPH were continuously disrupted and rapidly reconstructed under frictional shear stress, enabling efficient mechanical energy dissipation and enhancing the damping capacity of the TPU/MCPH composite. Consequently, under the synergistic effects of improved lubrication and enhanced damping capacity, the modified TPU composite exhibited a low coefficient of friction of 0.109 under aqueous conditions and a substantial reduction in vibration and noise responses. This innovative composite provides a promising strategy for developing high-performance polymer friction materials with superior lubricity and vibration-noise suppression under aqueous environments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Shaobo Yang,Chaochao Cao,Junke Cui,Jianguo Zhang,Song Yan,Yaxin Gu,Zihao Wang,Xinran Li,Jingwen Yang,Yanming Xue,Chengchun Tang
Hexagonal boron nitride ( h -BN) ceramics are attractive candidates for both structural and functional applications. However, the challenges in their inadequate deformability and inherent brittleness have not been significantly addressed. Herein, a type of h -BN ceramics (M2B-700-1300) with combined superior strength and toughness is fabricated via pre-pyrolysis, pressure molding, and high-temperature sintering in sequence. The key to the proposed strategy lies in proactively completing the intense gas-phase reaction of the precursor during the pre-pyrolysis stage, thereby forming a homogeneous boron oxynitride intermediate phase and then effectively alleviating structural collapse and pore defects during high-temperature sintering. The resulting ceramics, with densely stacked nanosheets framework bond-bridged by amorphous boron oxynitride structure, exhibit robust compressive strength of 439.2 MPa and large deformation of 10.18%. Impressively, it is as high as 5-8 times that of general h -BN ceramics in stress, and far exceeds 4% of traditional ceramics for strain, respectively. The successful synthesis of h -BN bulk ceramics with both superior strength and toughness provides potential opportunities for fabrication of other high deformability ceramics.
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2026
·
IF 7
Junlin Cai,Pengfei Li,Hongpu Huang,Shupeng Wang,Yu Peng,Yuhang Peng,Qiuxiang Wang,Xiaohong Wang,Zhaoxiong Xie,Shuifen Xie
Defect-rich RuO2 catalysts, although possessing high electrocatalytic activity, are inherently unstable for the anode oxygen evolution reaction (OER) in proton exchange membrane water electrolysis (PEMWE) due to rapid lattice oxygen depletion. Here we report an atomically Ir-doped, grain-boundary-rich RuO2 catalyst (Ir-GB-RuO2) that suppresses overactivation of lattice oxygen by forming robust Ru–O–Ir bridging motifs at grain boundaries, achieving high-performance acidic OER electrocatalysis and ampere-level stable PEMWE. The induced electronic modulation shifts the catalytic mechanism from a pure lattice oxygen mechanism (LOM) to a balanced coexistence of LOM and the adsorbate evolution mechanism (AEM), thereby achieving robust stability while preserving high intrinsic activity. The primary Ir-GB-RuO2 catalyst requires only 191 mV overpotential to achieve 10 mA cm–2 and exhibits a prolonged durability exceeding 1000 h at 100 mA cm–2. In a PEM electrolyzer, it attains the current density of 1.0 A cm–2 at a notably low cell voltage (1.67 V) and exhibits a minimal potential decay rate of only 55.3 μV h–1 over 1500 h of continuous operation. This work overcomes the intrinsic activity–stability trade-off in defect-rich Ru-based catalysts for industrial PEMWE.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Kaitong Liu,Yuan Rao,Zhaoxue Li,Shihang Zhou,Zhi-Zhong Zhang,Yanhui Zhang
The edge-sharing connection mode of [BO4] tetrahedra has greatly enriched the structural chemistry of borates, which provides more options and possibilities for designing more materials with unique structures and excellent performance. A zinc borate Ba5Zn4(B3O6)2(B12O24) (BaZnBO) was synthesized via a high-temperature solid reaction. Its uniqueness lies in not only introducing Zn into the structure of β-BaB2O4 but also containing the unusual edge-sharing [BO4] tetrahedra. The functional building units are isolated [B3O6] and [B12O24] groups. The adjacent [B3O6] groups are linked to a layer in the ab plane and further stack along the [001] direction, while the [B12O24] groups are located in the middle of these layers, thus forming the “sandwich” structure. This work also analyzed the impact of introducing Zn into β-BaB2O4 on the structure of anions. In addition, BaZnBO also exhibits good thermal stability and excellent optical properties including the short cut-off edge (204 nm) and suitable birefringence (0.058@1064 nm).
✓ 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）