JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Liying Pan,Qiu Zhang,Xueyue Lyu,Chenyang Zhang,Xinrui Wang,Jiawei Qi,Guangdong Zhao
Addressing the challenges associated with noise pollution problem necessitates the development of composite materials exhibiting both sound absorption and fire resistance under extreme environmental conditions. Conventional foam materials are limited by inadequate heat resistance, insufficient moisture resistance, and suboptimal functionality, rendering them unsuitable for such harsh environments. A new SiO 2 /C/SiBOC ceramic matrix porous sound-absorbing material was fabricated through a combination of sol-gel process, electrospinning, and organic impregnation techniques. Polyurethane foam (PUF) served as a template to establish a porous structure, while the SiBOC ceramic matrix conferred high-temperature resistance, and SiO 2 /C fiber reinforced the mechanical properties. Compared to traditional sound-absorbing materials, the developed composite demonstrates efficient sound absorption at low frequencies (NRC = 0.46) and across a broad frequency range (25–6500 Hz, α > 0.8). Additionally, it exhibits excellent thermal stability at elevated temperatures (up to 1400 °C), low thermal conductivity at room temperature (0.03463 W/m·K), high compressive strength (2.21 MPa), superior moisture resistance (contact angle θ = 101.4°), and a lightweight structure. This study contributes by proposing and validating a new design concept for porous ceramic composites, which can simultaneously balance acoustic, thermal, and mechanical properties as well as moisture resistance, effectively filling the gap in application areas of existing material systems.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 6
Shuangshan Li,Yuhui Li,Sensen Han,Guanjun Dong,Kai Wang,Yitong Dong,Qingshi Meng
Polyurea (PUA) coatings are widely used in protective applications but are limited by inherent flammability and reduced mechanical integrity from traditional flame retardants. Herein, we report a facile supramolecular modification of black phosphorus (BP) nanosheets, combining chitosan-assisted ball milling with melamine borate co-assembly to yield the CNB@BP nanohybrid. This nanohybrid showed excellent compatibility and dispersibility in the PUA matrix, providing nanocomposites with synergistic improvements in mechanical, anti-impact, thermal stability, and flame-retardant properties. Notably, 1 wt% loading increased tensile strength by 82.35% and impact resistance for aluminum alloy by 51.42%. At 3 wt% loading, peak heat release rate and total heat release dropped by 26.40% and 21.88%, respectively, with effective suppression of smoke and toxic gas emissions. These fire safety improvements arose from a P-N-B synergistic mechanism across two phases: catalytic charring and physical barriers in the condensed phase, plus radical scavenging and gas dilution in the gas phase. This supramolecular engineering approach thus offers a new paradigm for low-dose nanohybrids, enabling advanced PUA elastomers with balanced mechanical strength and fire safety.
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REACTIVE & FUNCTIONAL POLYMERS
·
2026
·
IF 5.1
Xiaoyan Sun,Ziheng Zhao,Chunfan Xu,Min Hao,Madeleine Bussemaker,Lian X. Liu,Ru Zhou
Rigid polyurethane foam (RPUF) is extensively employed in construction and transportation for its superior insulation and structural integrity. However, its inherent high flammability restricts its utility across various applications. The excessive use of traditional flame retardants can lead to a reduction in the physical properties of materials and generate toxic by-products during combustion. To address this challenge, we developed an innovative flame-retardant system for RPUF, using nitrogen-containing polyols synthesized from formaldehyde and melamine, and replacing traditional polyols with 2-methyl-1,3-propanediol (MPD), alongside boron-containing polyols derived from glycerol and boric acid. The incorporation of nitrogen- and boron-containing polyols at a 1:1 ratio has markedly raised the limiting oxygen index of RPUF from 19.1 % (pure RPUF) to 26.8 % while maintaining its mechanical properties, with the compressive strength ranging from 0.48 MPa to 0.50 MPa. Compared to traditional polyether polyols, MPD offers an environmentally friendly alternative by reducing toxic byproduct emissions during combustion, providing a safer profile in fire scenarios. Additionally, compared to pure RPUF, the total heat release and total smoke production were significantly reduced by 68.8 % and 52.4 %, respectively. Thermogravimetric analysis demonstrated enhanced thermal stability and char-forming ability, further confirmed by scanning electron microscopy. These findings suggest that the newly developed system has great potential for enhancing RPUF's flame retardancy and smoke reduction while maintaining its mechanical properties at the same time.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yujie Xiao,Zhenxi Liu,Litong Yu,Xiaofeng Lv,Juan Du,Baozhan Zheng,Yong Guo
A stable B, N-CDs@SiO 2 RTP composite was constructed via silica confinement. • The composite shows blue fluorescence and green phosphorescence with 15 s afterglow. • A UV–Vis/fluorescence/phosphorescence tri-mode platform was developed for TNP sensing. • Portable RTP-foam enables visual and semi-quantitative on-site TNP detection. The development of optical probes with multimodal responses is of great significance for improving the reliability of hazardous pollutant detection. Herein, a room-temperature phosphorescent (RTP) composite based on B/N co-doped carbon dots (B/N-CDs) confined within a SiO 2 ) matrix (B/N-CDs@SiO 2 ) was developed for the tri-mode detection of 2,4,6-trinitrophenol (TNP). B/N-CDs@SiO 2 exhibited blue fluorescence at 450 nm and green phosphorescence at 520 nm, with an average phosphorescence lifetime of 1.91 s and a visible afterglow lasting approximately 15 s, together with satisfactory optical stability. Interestingly, B/N-CDs@SiO 2 exhibits excellent response to TNP in both UV–vis absorption, fluorescence, and phosphorescence, thereby establishing a tri-mode sensing platform for TNP detection with detection limits of 1.81 μM, 0.32 μM, and 0.54 μM, respectively. The probe also demonstrates high selectivity for TNP over common ions and structurally related aromatic compounds, along with strong anti-interference capability. In spiked recovery tests in kinds of real samples, the satisfactory recoveries ranging from 91.2% to 108.9% (RSD: 0.34% to 3.74%) demonstrating its higher detection accuracy. Finally, the composite can be immobilized onto polyurethane foam to construct a portable visual sensing platform, which also successfully enabled the tri-mode and semi-quantitative detection of TNP. This work opens up a new avenue for the development of multi-signal detection systems for expanding their practical applications. Schematic illustration of the synthesis of B/N-CDs@SiO 2 and its application in TNP tri-mode sensing construction for TNP visual detection. Download: Download high-res image (187KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Mengxiang Liu,Mengle Li,Ziqian Xu,Miao Li,Jiale Fan,Yu Zhang,Kaibo Yu,Zihan Kong,Tao Zhang,Xiaoxiao Huang
Interfacial polarization tuning via BO x F y modification and in situ N-doped carbon • Synergistic interfacial polarization for dielectric response and impedance matching • Minimum reflection loss of −58.97 dB with a bandwidth of 4.24 GHz Pristine Ti 3 C 2 T x MXene generally suffers from severe impedance mismatch arising from its excessive electrical conductivity, which fundamentally limits efficient electromagnetic wave (EMW) attenuation. Herein, an interfacial modulation strategy is proposed by integrating fluorinated boron oxide (BO x F y ) nanophases and in situ derived N-doped carbon into a Ti 3 C 2 T x MXene framework through a hydrothermal process. Distinct from conventional boron-containing modification, the introduced BO x F y species provide abundant polarization-active sites and tailor the local interfacial environment through the coexistence of B O and B F coordination, thereby improving dielectric polarization and impedance matching. Meanwhile, the in situ formed N-doped carbon establishes defect-rich conductive networks, enabling balanced conductive loss and dipolar polarization. More importantly, the synergistic coupling among BO x F y nanophases, N-doped carbon, and Ti 3 C 2 T x MXene constructs abundant heterogeneous interfaces and multiscale conductive pathways, facilitating interfacial polarization and electromagnetic energy dissipation. As a result, the optimized BN(1:1)-MXene achieves a minimum reflection loss of −58.97 dB at 1.77 mm and an effective absorption bandwidth of 4.24 GHz. Furthermore, radar cross-section simulations demonstrate remarkable electromagnetic scattering suppression with a maximum reduction of 32.05 dB m 2 at normal incidence. This work highlights the synergistic effects of interfacial modulation on electromagnetic attenuation, offering a promising strategy for high-performance MXene-based EMW absorbers. Download: Download high-res image (320KB) Download: Download full-size image
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Daqi Chen,Zhezhi Fang,Limin Wang,Tao Zou
Ultrasensitive and field-deployable detection of Pb 2+ is highly desirable for environmental monitoring and public health protection. Nucleic acid-based sensors are promising for this purpose because they are programmable and compatible with isothermal analysis. However, current amplification strategies face a fundamental trade-off: enzyme-assisted methods provide high sensitivity yet require unstable protein catalysts and cold-chain logistics, whereas enzyme-free circuits are operationally robust but suffer from thermodynamic background leakage. To address this sensitivity–stability paradox, we propose PADLOCK (Pb 2+ -Activated Dual-DNAzyme Locked On-site Cascade Kit), a protein-enzyme-free amplification strategy operating at ambient temperature (25 °C). PADLOCK uses a two-stage catalytic cascade for high-gain signal amplification. Specifically, the upstream GR-5 DNAzyme module was optimized by tuning hairpin stem complementarity and loop geometry to suppress premature trigger release, while the downstream self-locked DNAzyme (SLD) was redesigned through base-pair engineering to improve the signal-to-noise ratio. This cascaded “cleavage-then-unlock” architecture achieves amplification gains substantially exceeding those of conventional enzyme-free circuits such as catalytic hairpin assembly (CHA) or hybridization chain reaction (HCR), while maintaining near-zero background, a combination that is difficult to achieve in enzyme-free systems. Under optimal conditions, PADLOCK demonstrates a sensitivity range of 1 pM to 1 μM with a detection limit of 342 fM and exceptional selectivity over eight competing ions. Reliable quantification in real water and soil samples yielded spike recoveries of 98.17%–111.69%. Furthermore, integration with a custom-built smartphone imaging interface further enables visual monitoring across 100 pM–1 μM, providing a robust, point-of-care testing (POCT) platform that eliminates cold-chain logistics and enables ambient-temperature operation for decentralized heavy-metal screening in resource-limited settings.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Jingjing Xu,Huili Zhang,Xuemei Shi,Xin Wen,Jingyao Lu,Jindong Chen,Chensheng Lin,Ning Ye,Guang Peng
By incorporating rare-earth and alkali metals into borates, two noncentrosymmetric borate crystals, K3Yb2(BO3)3 and Rb3Yb2(BO3)3, were successfully obtained via a high-temperature solution method. Both K3Yb2(BO3)3 and Rb3Yb2(BO3)3 deliver second harmonic generation (SHG) responses of 0.39 and 0.22 × KH2PO4 (KDP) and moderate birefringence of 0.029 and 0.035 at 546 nm. The UV cutoff edges of the two title crystals are 237 and 240 nm, which correspond to band gaps of 4.68 and 4.61 eV. Both K3Yb2(BO3)3 and Rb3Yb2(BO3)3 demonstrate high thermal stability, with decomposition temperatures of 942 and 885 °C, respectively. In addition, to better demonstrate the relationship between microscopic groups and macroscopic optical performance, the first-principles calculations were carried out, which revealed that the optical polarizability of K3Yb2(BO3)3 and Rb3Yb2(BO3)3 originates from the synergy between the BO3 units and the rare-earth polyhedra.
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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 32
·44367-44377
·
IF 7.8
Zhang Zihong,Liu Ying,Hu Chengyao,Yan Hui,Fan Li,Huang Yawen
The preparation of anti-corrosive coatings with durability under impacting still remains a big challenge. In this work, polyureas (BPUB) with the shear hardening effect (SHE) were prepared by introducing B–O dynamic bonds. Besides, the transfer self-healing effect was realized by integrating a bottom fast self-healing coating. The two-layered polymer coating was found to combine fast self-healing toward large-size scratch (∼5 h) and high impact resistance (>20 J/mm). Multi-layered anti-corrosive coating can repair damage by impacting and preserve high impedance (1.32 × 10 10 Ω·cm 2 ) after 250 d. The prepared anti-corrosive coating system has high impact resistance, long-term durability, and room temperature autonomous fast self-healing ability, which provides a broad application prospect for impact-resistant anti-corrosive applications.
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ACS Applied Polymer Materials
·
2026
·Vol. 8
·期 14
·11286-11295
·
IF 5.2
Zhang Yihao,Zhao Zhuang,Rong Youjie,Hu Jiutao,Xue Jixiang,Huang Xiaobo,Yao Xiaohong
Gel electrolytes have emerged as key components in energy
storage
devices. However, conventional gel electrolytes often exhibit limited
deformation resistance and inadequate mechanical recovery under sustained
external stress, which compromises their long-term operational stability.
Herein, we report a self-healing eutectogel electrolyte comprising
a choline chloride-ethylene glycol deep eutectic solvent (ChCl-DES)
as the dispersion medium and a poly[2-(hydroxyethyl acrylate)] (PHEA)
polymer network. The incorporation of boric acid (BA) and polyethylene
glycol (PEG) enables the formation of dynamic borate ester bonds through
interactions with hydroxyl groups. The reversible rupture and reformation
of these dynamic covalent linkages impart robust self-healing capabilities
to the material. The resulting eutectogel achieves an elongation at
break of up to 1190% and exhibits a self-healing efficiency of 82%
after 24 h. Moreover, supercapacitors assembled with this eutectogel
electrolyte deliver an areal capacitance of 183 mF/cm 2 at
a current density of 3 mA/cm 2 . This work provides a design
strategy for the development of high-performance and durable energy
storage devices, demonstrating significant potential for applications
in flexible electronics and smart sensing systems.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 20
·1562
·
IF 3.2
Guo Sijia,Qin Jianguo,Liu Xiangdong,Yang Chuanhua,Song Baisen,Zhu Yongchang,Li Zizhou
Lightweight broadband microwave absorbers with strong attenuation remain challenging because efficient absorption requires balanced impedance matching and electromagnetic loss over a wide frequency range. Herein, hierarchical core–shell BCN@CoNi@PANI (BCNPa) composites were rationally designed by integrating BCN, CoNi alloy, and conductive PANI. BCN serves as a lightweight dielectric substrate, CoNi provides magnetic loss, and the outer PANI shell regulates dielectric response and conductive loss. The electromagnetic properties of BCNPa can be effectively tuned by adjusting the PANI content. The excellent absorption performance over 2–18 GHz originates from the synergistic effects of impedance matching, dielectric loss, magnetic loss, and hierarchical structural attenuation. Dielectric loss is mainly related to defect-induced dipole polarization, interface-related polarization relaxation, and conductive loss from the π-conjugated PANI shell, while magnetic loss arises from natural resonance, exchange resonance, and eddy current loss of CoNi. Benefiting from optimized dielectric–magnetic balance, BCNPa-2 achieves ultralow minimum reflection loss ( RL min ) of − 81.4 dB at 14.12 GHz and an ultrabroad effective absorption bandwidth ( EAB ) covering nearly the entire measured range. This work provides an effective strategy for high-performance broadband microwave absorbers.
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ACS Nano
·
2026
·Vol. 20
·期 31
·22068-22081
·
IF 17.3
Xu Sheng,Liu Rixin,Liu Zhaoguo,Li Jing-chang,Tian Jiaming,Lu Hangyu,Ning Wenjie,Zhu Yue,Zhou Haoshen,Guo Shaohua
Sodium-ion batteries offer promise for large-scale energy
storage,
yet the environmental sensitivity of layered cathode materials significantly
hinders commercialization. Current strategies often fail to simultaneously
address water intercalation and cation exchange while maintaining
electrochemical performance. Here, we demonstrate a nanoscale surface
engineering approach through the formation of a precisely controlled
∼20 nm [BO 3 ] gradient on layered oxide cathode surfaces.
This gradient integration creates a protective interface by coordinating
with [MnO 6 ] polyhedra at the material surface, as confirmed
by EELS analysis and DFT calculations. The surface-modified P2–Na 0.67 Mn 0.88 Al 0.12 B 0.05 O 2 (NMABO) cathodes deliver 176 mAh g –1 initial
capacity at 0.2C and 80.1% retention after 1000 cycles at 10C. Crucially,
the engineered interface enables exceptional moisture resistance in
NMABO with 80.3% capacity retention after 1300 cycles following 14-day
air exposure and shows minimal capacity loss after 2-year storage
under controlled conditions. Mechanistic investigations reveal that
the [BO 3 ] gradient simultaneously inhibits Jahn–Teller
distortion and creates energetic barriers against H 2 O intercalation
and Na + /H + exchange. The strategy’s universality
is further validated on commercial O3-NaNi 1/3 Fe 1/3 Mn 1/3 O 2 cathodes, which demonstrate robust
stability in humid air and confirm superior acid and oxidation resistance.
This work establishes a scalable approach for enhancing the environmental
stability of sodium layered oxides through rational nanoscale interface
design, addressing the fundamental degradation in ambient conditions.
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INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 31
·18241-18251
·
IF 4.6
Liu Zheyang,Zhang Na,Liu Yifan,Li Jing,Nie Kaiqi,Yan Binhang,Cao Dawei,Yan Zaoxue,Choi Wonyong,Jiang Zhifeng
The development of efficient and metal-free photocatalysts
for
the CO 2 reduction reaction remains a significant challenge.
Herein, a novel metal-free photocatalyst is constructed by anchoring
black phosphorus quantum dots (BPQDs) onto boron nitride nanofibers
(BNNFs) to form an atomic-level charge transport pathway. This unique
zero-dimensional/one-dimensional heterostructure exhibits a remarkable
photocatalytic CO 2 -to-CO conversion activity, achieving
an evolution rate approximately 12 times higher than that of pristine
BNNF. Comprehensive experimental characterizations and density functional
theory calculations collaboratively reveal the mechanism behind this
enhancement: the BPQDs not only serve as active sites for CO 2 activation but also establish rapid charge-transfer channels. Furthermore,
the modified electronic structure effectively lowers the energy barrier
for the key *COOH intermediate formation and facilitates the desorption
of *CO, thus boosting the overall reaction kinetics. This work opens
a new horizon for exploring delicate metal-free hybrid systems at
the atomic scale to modulate the charge kinetics and energy barrier
toward solar fuel production.
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