CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Binhong Yu,Ziyan Chen,Zhiyuan Sun,Chengjun Yu,Zhenni Lu,Songshan Zeng
Hydroxypropyl cellulose (HPC) forms semi-transparent cholesteric liquid crystals (CLCs) under lyotropic conditions, exhibiting concentration- and temperature-dependent structural colors, covering the spectral region from ultraviolet (UV) to near-infrared (NIR). Notably, HPC CLCs exhibit a milky-white color against a white background owing to the incoherent scattering. Inspired by basal melanin-mediated color saturation between blue and white Steller's jay feathers, black backgrounds significantly enhance the saturation of structural colors by suppressing multiple incoherent scattering. Leveraging this mechanism, we propose a facile three-dimensional (3D) integration method for fabricating thermoresponsive and extreme-condition-resistance devices, composed of HPC CLCs with structural colors and thermochromic powders (TCPs) with a color switch between black and white. A single device displays color transitions among black, blue, green, red, and white, resulting from the synergistic effects of helical pitch modulation and dynamic incoherent scattering upon temperature stimuli. Intriguingly, coupling conductive carbon-oil substrates with hybrids enables electrothermal multicolor displays through Joule heating effects. Furthermore, the devised hybrids show great potential in anti-counterfeiting, smart labeling, camouflage, and information encryption through programmable TCP patterning beneath HPC CLCs. This work pioneers a new paradigm for synergistic integration of stimuli-responsive photonic crystals with adaptive absorbers, enabling scalable fabrication of color-switchable devices with customized control capabilities.
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Laser & Photonics Reviews
·
2025
·
IF 10
Qunhuo Liu,Xuezhe Dong,Yujie Liu,Weilin Chen,Yingying Cui,Abhishek Wadhwa,Ting Wang,Xvsheng Qiao,Jincheng Du,Guodong Qian,Xianping Fan,Siu Fung Yu
The multiphoton upconversion of near-infrared (NIR) light into challenging UV emission is of great importance and interest for both fundamental research and advanced applications. However, the NIR-to-UV multiphoton upconversion process is inherently inefficient. In this work, a strategy is presented to enhance NIR-to-UV conversion by integrating spatial and temporal control of energy transfer (ET) in lanthanide-doped transparent materials. Through a molecular dynamics simulation-assisted glass-ceramic design approach, the spatial distance is reduced between Yb-Tm-Gd ions and accelerated their ET rates, achieving a 267-fold enhancement of UV emission at 311 nm. Furthermore, this is showed that energy depletion in intermediate excited levels and back ET can be suppressed through short pulse-width excitation, thereby increasing the proportion of UV photons in upconversion emissions from 1.61% to 38.81%. Consequently, low-threshold, room-temperature random lasing at 311 nm under 980 nm ns laser excitation is realized. These findings establish a novel design framework for developing compact solid-state UV lasers with practical applicability.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 44
·15706-15719
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IF 6.4
Fei Xiong,Wen Liu,Zuimin Jiang,Zhu Zhu,Wanbiao Hu
Broadband ultraviolet (UV) excitation and narrow red-emitting phosphors are employed extensively for spectral conversion, yet finding materials with a luminous efficiency high enough for applications is still challenging. Herein, extremely efficient red emission was realized by way of the exciton-assisted energy transfer when the LuNbO4:xEu3+ phosphors were irradiated with UV light in the broadband region of 220–300 nm. When exciting the interband transition with UV light, self-trapped excitons (STEs) were generated and captured by Eu3+ ions to transfer the energy for lighting. The STE behaviors dominating the luminous properties could be optimized by tuning the Eu3+ doping. With increasing the doping levels x, more efficient energy transfer occurred, resulting in enhanced Eu3+ luminescence with the STE emission fading, and the luminescence external quantum efficiency reached an amazing value of 66.8% when x = 0.09. The STE-emission decay curves showed that the energy transfer was realized by exciton transmission from the NbO43− groups to the Eu3+ ions. The Eu3+ doping resulted in more isolated NbO4 tetrahedrons exerting a larger location force on the STEs, and then an orientational host–activator energy transfer occurred, accounting for the efficient light conversion. Since Eu3+ ions could capture more escaping STEs upon thermal stimulus and obtain extra exciting energy to resist the thermal quenching, the red emission also exhibited excellent thermal stability even at 478 K. These results suggest that the exciton-assisted energy transfer could initiate the exploration of new stably efficient red phosphors for applications in light conversion.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
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IF 7.46
Xiqi Chen,Jinyong Hu,Pei Chen,Mengqi Yin,Fanpu Meng,Yong Zhang
Transition metal dichalcogenides (TMDs) have blazed a novel trail in the field of NO 2 gas detection owing to the unique photoelectric properties and prospective gas sensing performance especially working at low operating temperature. However, the incomplete recoverability and susceptibility to humidity at room temperature restrict the practical applications of TMDs-based gas sensors. Herein, we demonstrate a fully recoverable WS 2 based gas sensor with enhanced anti-humidity ability by combining the decoration of zero-dimensional PbS nanoparticles and the assistance of UV light. Through the control over the molar ratio of WS 2 /PbS, the optimized WS 2 /PbS (the molar is 10:1) gas sensor exhibits a remarkable elevated recovery rate from 33.4% to 99.8% with almost no baseline drift as compared to that in the pure WS 2 gas sensor. More importantly, attributing to the irradiation of UV can accelerate the desorption of water molecules, WS 2 /PbS heterostructure based gas sensor manifests more stabilized anti-humidity performance with stable initial resistance and negligible response value drift (8.8%) in the range of 10%–90% relative humidity. Furthermore, UV-assisted WS 2 /PbS gas sensor also possesses prominent sensing performances including high sensitivity, low detection limit (∼20 ppb), favorable selectivity and outstanding long-term stability. This research will pave the way on designing high-performance TMDs-based gas sensors operating at room temperature.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Yalin Zhai,Hui Li,Chengyu Luan,Songling Feng,Peng Wan,Caixia Kan,Daning Shi,Mingming Jiang
Solar-blind ultraviolet polarization detection is critically hindered by the intrinsic isotropy, complex fabrication, and insufficient polarization sensitivity of conventional ultrawide-bandgap (UWBG) semiconductors such as Ga 2 O 3 and h-BN. Here, we break this deadlock by introducing a rationally designed lead-free perovskite analogue, one-dimensional Rb 2 AgCl 3 single crystals, which were synthesized via a spatially confined cooling method. Its unique chain-like lattice endows an ultrawide bandgap of 4.83 eV, exceptional thermal stability up to 934 K, and pronounced in-plane optical anisotropy. Enabled by these attributes, a Schottky-junction self-powered photodetector achieves unprecedented solar-blind ultraviolet performance: a responsivity of 0.2 A/W, specific detectivity of 3.46 × 10 12 Jones, external quantum efficiency of 96%, ultrafast response of 7.9/17.5 µs, and a record dichroic ratio of 15.8 at 255 nm. These metrics not only surpass all reported perovskite-based devices but also rival, and even outperform, state-of-the-art UWBG semiconductors. Furthermore, the detector enables high-fidelity polarization imaging, convolutional neural network integration with >99% recognition accuracy, and a 6 × 6 array encryption system based on physically unclonable function keys. This work elevates low-dimensional lead-free perovskites from mere substitutes to genuine rivals, establishing a transformative platform for intelligent, self-powered solar-blind optoelectronics.
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Food Chemistry-X
·
2026
·
IF 9.2
Jieni Liu,Leilei Wu,Fan Yinyin,Hongqian Hu,Yu Qiao,Qing Sun,Lihui Zhang,Dahui Liu
Fresh-cut purple yam is highly susceptible to enzymatic browning during storage, primarily driven by peroxidase (POD), while superoxide dismutase (SOD) serves as an oxidative-stress marker. This study investigated the effects of ultraviolet-C (UV-C), high-voltage electrostatic field (HVEF), and their combination (UV-HVEF) on browning inhibition and quality preservation. The combined treatment (UV-C at 68 W for 120 min followed by HVEF at 30 kV for 8 min) exhibited the strongest synergistic effect, achieving the highest L* value, total phenolics, flavonoids, and anthocyanins, along with the lowest browning degree after 8 days of storage. UV-HVEF induced tryptophan exposure and α-helix loss in these enzymes, leading to inactivation, while downregulating POD, phenylalanine ammonia-lyase (PAL), cinnamate-4-hydroxylase (C4H) expression and preserving p -coumaric acid at 54.56% higher than the control. Correlation analysis confirmed brightness positively correlated with phenolics and negatively with enzyme activities. Scanning electron microscopy revealed HVEF damaged starch granules, while UV-HVEF caused irregular morphology. Overall, UV-HVEF is an effective non-thermal strategy balancing enzyme inactivation with quality maintenance.
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PubMed
高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Ma Yunlong,Fan Tao,Li Shufang,Zhu Feihao,Zhang Chu
Emergency online sealing of pipeline leaks poses significant
challenges
due to the complexity of pipeline structure, stress state, and conveying
medium. This study developed a magnetorheological adhesive and a synergistic
online sealing method combined with a magnetic device. The polymerization
process and molecular structural characteristics of the product were
analyzed using fourier transform infrared spectroscopy (FTIR), X-ray
photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and TG-DSC.
The curing mechanism involves the simultaneous radical-induced cationic
frontal polymerization of the epoxy group and free radical polymerization
of the alkenyl, finally forming a cross-linked network comprising
rigid bisphenol A segments and flexible polyethoxy segments. The effects
of reactant formulation ratios on polymerization behavior and mechanical
properties were systematically investigated. The cured product exhibited
a maximum tensile strength of approximately 35.9 MPa and a bonding
strength to metals of approximately 9.17 MPa while demonstrating typical
soft magnetic behavior with magnetization intensity proportional to
the magnetic filler content. Static pressure sealing tests and online
pressurized sealing tests were conducted. The flow field characteristics
of the leak sealing process were investigated using Fluent simulations,
and the sealing device was optimized accordingly. The emergency online
sealing can be successfully achieved for leakage diameters up to 10
mm and leakage pressures up to 1.5 MPa, with the entire sealing process
completed within 10–20 min. This study provides a feasible
and effective strategy for rapid, on-site emergency sealing of pipeline
leaks.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Zihao Huang,Jiamin Wang,Jiawei Hou,Haoyue Hou,Kaihui Xu,Hao Yuan,Sa Zeng,Tao Meng
Inorganic nanoparticles with excellent anti-ultraviolet ability such as titanium dioxide (TiO 2 ) are extensively utilized in sunscreens to protect against UV-induced skin photodamage and carcinogenesis. However, conventional TiO 2 nanoparticles exhibit inherent photocatalytic activity that generates harmful reactive oxygen species (ROS), which limits their applications as sunscreen. In this work, we firstly apply polysaccharide-polyphenol interaction to the sunscreen application of inorganic UV filters (named TiO 2 -TA-CS). Because of the synergistic effect of corn starch (CS) in enhancing TiO 2 nanoparticles dispersion and blocking ROS, TiO 2 -TA-CS exhibit the enhanced UV absorption and leverages tannic acid (TA) to achieve complete eradication of hydroxyl radicals and superoxide radicals generated by TiO 2 nanoparticles, which superiors to the previous reports of bio-safe sunscreen. Furthermore, the UV absorption capacity of TiO 2 -TA-CS Pickering emulsions is increased by a factor of 2.5 and there is no obvious cytotoxicity in the UV evaluation. Compared with commercial sunscreens, it has lower UV penetration rate and higher SPF value. In vitro studies and cell viability assays collectively confirm the excellent efficacy of the formulated sunscreen in mitigating photoaging and protecting skin cells against UV-induced damage. Therefore, the TiO 2 -TA-CS Pickering emulsions exhibit favorable biocompatibility, high UV protection, and human skin safety, providing a new strategy for sun protection and other medical applications.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Kadir Aygul,Li Yan,Ahmant Ali,Yan Yin,Dong Xiaoyu
In this study, a high-performance self-powered ultraviolet photodetector (UV PD) is demonstrated, which is fabricated through straightforward hydrothermal and electrochemical deposition techniques. The device features a p–n heterojunction structure composed of ZnO nanorods (NRs) as the n -type bottom layer, poly(3,4-ethylenedioxyselenophene) (PEDOS) as the p -type top layer, and copper oxide (CuO) nanoparticles (NPs) incorporated as a key intermediate layer. Under weak UV irradiation (365 nm, 0.32 mW/cm 2 ), the fabricated UV PD delivers outstanding self-powered performance, attaining a responsivity of 0.185 μA/W and a detectivity of 3.58 × 10⁹ Jones. The CuO NPs insertion layer is verified as the key contributor to device performance enhancement: the UV PD with the CuO NPs interlayer exhibits a responsivity higher than that of the device without the interlayer. This performance boost is attributed to the CuO NPs’ ability to optimize heterojunction quality-specifically; it facilitates carrier generation, transport, and separation while extending carrier lifetime, thus substantially enhancing the responsivity of the CuO NPs/ZnO/PEDOS self-powered UV PD. Additionally, the fabricated self-powered UV PD exhibits excellent multi-cycle stability and robust detection performance under different light intensities. With its high efficiency and low-cost fabrication process, this self-powered UV PD exhibits great potential for practical applications in UV sensing systems.
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POLYMER
·
2026
·
IF 5.1
Jiapeng Ye,Deming Zhou,Lifan Li,Chenji Zhang,Leyan Li,Kun Luan,Zaixing Zhang,Lingxiao Jing,Ruizhi Xue,Tonghua Zhang
Poly(p-phenylene-2,6-benzobisoxazole) (PBO) fiber, made from a rigid-rod isotropic crystal polymer, exhibits exceptional tensile strength, thermal stability, and creep resistance, surpassing Kevlar fiber (one of high-performance bullet proof fibers) with twice the strength and modulus. However, UV exposure cleaves the oxazole rings in PBO’s molecular structure, leading to decreased crystallinity, reduced mechanical strength, and limited suitability for outdoor applications. This study introduces a novel surface enhancement method using an olefin addition reaction with an azobenzene polyepoxy (Bt-APDB-BA-GMA) coating for Ultraviolet (UV) resistance. Further combining this with nano titanium dioxide (TiO 2 ) forms an organic-inorganic layer for additional protection. Comparative studies were conducted on three samples, including original PBO fibers (PBO), PBO fibers modified with azobenzene/epoxy copolymer (PBO/azo-epoxy), and PBO fibers modified with both azobenzene/epoxy copolymer and nano TiO 2 (PBO/TiO 2 @azo-epoxy). Modified fibers showed significant improvements: PBO/TiO 2 @azo-epoxy exhibited a 63 % higher pull-out strength (34.58 MPa) and retained 78.2 % tensile strength after 288 hours of UV aging, compared to 28.2 % for unmodified fibers. This innovation enhances PBO fiber durability, UV resistance, and interfacial bonding, paving its way for broader applications in body armor, aircraft, and advanced technologies.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·
IF 12.2
Fang Jiang,Xinrong Liao,Haonan Dong,Ziyao Zhu,Li Guo,Huaxin Li,Li Rao,Zhihui Ai,Jingming Gong
Abstract The growing use of biochar is increasing the release of biochar-derived dissolved organic matter (BDOM) in surface waters. Concurrently, remediation of persistent per- and polyfluoroalkyl substances (PFAS) remains challenging. Although natural DOM can both photosensitize and scavenge reactive species, how BDOM modulates PFAS transformation in waters is unclear. Here, we show that low-level BDOM (1 mgC L–1) unexpectedly promotes PFAS defluorination in the UV/sulfite (UV/S) system by simultaneously boosting hydrated electron (eaq–) production and generating oxidizing radicals via triplet states (3BDOM*). The hydrophilic, moderately condensed aromatic, fulvic/humic-like fraction of BDOM is most effective across all tested feedstocks and pyrolysis temperatures. BDOM derived at 500 °C raises eaq– yield 2.6-fold over UV/S alone while co-producing •OH. Crucially, BDOM appears to reroute the eaq–-mediated decarboxylation–hydroxylation–elimination–hydrolysis pathway: instead of water addition, •OH may directly attack perfluorinated radical, making key steps more thermodynamically favorable and accelerating C–F cleavage. Leveraging naturally derived BDOM in waters, this eaq–/•OH-mediated reduction-oxidation coupling may reduce reliance on externally added chemicals while achieving complete degradation of perfluorocarboxylic acids and GenX within 1 h and ∼80% defluorination within 6 h. The findings establish BDOM as an intrinsic photosensitizer and electron ejector that reshapes radical chemistry and PFAS reaction pathways, supporting more efficient and sustainable UV/S-based remediation.
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Applied Materials Today
·
2026
·
IF 7
Jinqing Li,Chen Chen,Ningli Pan,Lili Wang,Dawei Gao
Superhydrophobic cotton fabric made by H-MIL-100(Fe)/PDMS. • Excellent self-cleaning, UV shielding, and oil-water separation. • Efficient oil-water separation with stable cyclic performance. • Good mechanical and chemical durability for practical use. The discharge of oil-containing wastewater not only pollutes water bodies but also poses a threat to human health and the living environment. Therefore, the development of multifunctional textiles integrating stain resistance, UV protection, and efficient oil-water separation has become a research hotspot. In this study, iron-based metal-organic framework (MOF), NH 2 -MIL-100(Fe), was used as the core material. Hydrophobic H-MIL-100(Fe) was constructed through hydrothermal synthesis and surface modification with stearic acid (SA), and then compounded with polydimethylsiloxane (PDMS). A micro-nano hierarchical structured coating was fabricated on the surface of cotton fabric via a vibration-curing process. Experimental results showed that the coated cotton fabric exhibited superhydrophobicity (water contact angle, WCA = 156°, sliding angle = 8°) and self-cleaning properties. After mechanical friction or immersion in acid-base solutions (pH = 1–13), the WCA still remained at 142 ± 2°. The ultraviolet protection factor (UPF) reached 101.9. Oil-water separation tests indicated that the separation efficiency for four types of oil-water mixtures (n-hexane, ethyl acetate, toluene, and chloroform) was all over 97%, with a flux ranging from 3315 to 3500 L·m −2 ·h −1 . After 10 cycles of separation, the efficiency was still maintained at 98%, demonstrating excellent corrosion resistance and mechanical stability. In this study, the synergistic regulation of the micro-nano structure of MOF and the low surface energy of PDMS realized the multifunctional integration of cotton fabric, providing a new material solution for environmental remediation and outdoor protection. Download: Download high-res image (203KB) Download: Download full-size image
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