SENSORS
·
2016
·Vol. 16
·期 8
·1249
·
IF 2.033
Xiaoying Peng,Zhongming Wang,Pan Huang,Xun Chen,Xianzhi Fu,Wenxin Dai
An anatase TiO2film sensor was prepared by a facile in-situ method on the interdigitated Au electrode deposited on the alumina substrate. The structure, morphology and the optical properties of the in-situ TiO2film sensor were characterized by X-ray diffraction, Scanning Electron Microscopy, and UV-vis diffuse reflectance spectra. The photo-assisted gas sensitivities of the prepared film towards H2gas were evaluated at room temperature in N2and synthetic air atmospheres. As compared to TiO2film sensor prepared by drop-coating method, this in-situ TiO2film sensor exhibited a more compact structure composed of uniform TiO2microspheres as well as a better gas sensitivity towards H2under UV irradiation, especially in synthetic air. The photo-electrochemical measurements suggest that these improvements may be associated with the efficient charge transfer in the TiO2interface induced by the TiO2microsphere structure. This study might offer a feasible approach to develop photo-assisted gas sensors at ambient temperature.
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PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Jianben Xu,Zhangyan Shi,Yuedong Xing,Wenzhe Niu,Yutao Yang,Xiang Xu,Faai Zhang
Superhydrophobic coatings are extensively used in applications such as anti-icing and anticorrosion owing to their multifunctionality. However, their limited abrasion resistance restricts their wider use. Herein, a rosin-based self-healing superhydrophobic composite coating was developed through a straightforward spraying and ultraviolet photopolymerization method. By incorporating rosin diols to replace a portion of petroleum-based diols, the rigid tricyclic phenanthrene structure enhances the material's mechanical properties (tensile strength of 28.9 ± 0.6 MPa, toughness of 40.4 ± 0.9 MJ m −3 ) and self-healing capabilities (scratches fully heal within 2 h at 80 °C). The combination of micro- and nanoscale hierarchical structures with low surface energy materials endowed the coating with exceptional superhydrophobicity, resulting in a water contact angle of 163.4 ± 1.4°. Notably, modified silica (M-SiO 2 ) was incorporated into the polyurethane matrix via photocrosslinking, considerably enhancing the coating's mechanical and chemical stability, while preserving its superhydrophobicity even in extreme environments. Furthermore, these coatings are multifunctional, offering excellent self-cleaning, antifouling, anticorrosion, and anti-icing properties (with a freezing time of up to 728 s at −15 °C). Their compatibility with various substrates (such as glass, fabrics, paper, metal, and wood) and the simplicity of the preparation process make them highly promising for applications in self-cleaning surfaces, antifouling of marine equipment, anti-icing and other areas.
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CHEMICAL PAPERS
·
2025
·
IF 2.5
Dai Mengxia,Wang Chaoyang,Wang Yashan,Zhang Ran,Chen Feifei
Due to the increasing deterioration of the aqueous environment caused by various organic dyes, the development of highly efficient novel photocatalysts has become urgent. This study designed a novel UV/layered double oxides (LDO)/thiourea dioxide (TD) system based on UV-assisted advanced reduction processes to achieve efficient and cost-effective degradation of methyl orange (MO). The experimental results exhibited that 99.7% of 50 mg/L MO was completely degraded in UV/LDO/TD within 20 min at 25 °C and pH 10. During the decomposition of TD, highly reductive e aq − , SO 2 2− and H· were generated, and in the presence of dissolved oxygen simultaneously produced oxidizing species such as O 2 ·− , OH·, and 1 O 2 . Oxygen vacancies of LDO not only activated TD but also acted as an electron shuttle to transfer electrons from TD to MO. Non-radical degradation pathways, including 1 O 2 and electron transfer process, dominated the degradation of MO. The degradation efficiency of MO remained at 93.2% after 5 cycles, demonstrating the excellent reusability of LDO in the UV/LDO/TD system. This study provided new insights into LDO-activated TD under UV irradiation for environmental remediation. It highlighted the commercial potential of the UV/LDO/TD system for sustainable, scalable removal of organic dyes from industrial wastewater.
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FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Lingyan Zheng,Zhifang Ning,Yumin Shen,Lei Tang,Sharuna De,Yi Wang,Hong Duan
Food spoilage is a major challenge to food safety. The development of multifunctional food packaging materials offers an innovative and effective strategy to mitigate this issue. In this study, we successfully synthesized the water-soluble Silver - polylysine - diethyl ferulate (Ag-PLL-DEF) polymer using a CuAAC reaction and an in situ growth method, which enhanced the dispersibility of diethyl ferulate (DEF) in aqueous solutions. This polymer was then blended with Polyvinyl alcohol (PVA) to create the Ag-PLL-DEF/PVA composite film. Our results demonstrate that incorporating DEF significantly improved the UV resistance of the composite film, with the UV shield rate of the 0.8 wt% Ag-PLL-DEF/PVA composite film reaching 98.62 %. After 30 days of continuous UV irradiation, the composite film exhibited outstanding light stability. The incorporation of Ag and PLL conferred remarkable antibacterial properties to the composite film. The inhibitory zone diameters of the 0.8 wt% Ag-PLL-DEF/PVA composite film against E. coli and S. aureus were 3.3 ± 0.2 mm and 2.75 ± 0.15 mm, respectively. Furthermore, a strawberry preservation experiment confirmed that the Ag-PLL-DEF/PVA composite film effectively inhibited bacterial growth and extended the shelf life of strawberries by up to 7 days. Similarly, preservation experiments with milk and jujube revealed that the composite films reduced photooxidation and significantly prolonged shelf life. This work provides valuable insights into the development of composite films with both anti-ultraviolet and antibacterial properties. It also offers a promising framework for advancing active food packaging technologies.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Hong Zhang,Xin Zhang,Bo Wang,Bo Ren,Xiaodong Yang
Food spoilage leads to plenty of food being wasted every year. Safe and multifunctional food preservation packaging is urgently required to prevent food from contamination. Chitosan/gallic acid/Fe 3+ (CSGA-Fe 3+ ) composite films were synthesized by incorporating gallic acid (GA) and Fe 3+ into a chitosan solution. The integration of GA forms covalent and hydrogen bonds with chitosan, whereas Fe 3+ addition establishes metal-ligand interactions with both chitosan and GA, resulting in a film characterized by a multi-crosslinked network structure. This multi-crosslinked system substantially enhanced the material's mechanical properties and increased resistance to oxidation and ultraviolet degradation. The data indicate that the mechanical strength of chitosan/gallic acid (CSGA) films, with an inclusion of 0.3 mmol of GA, improved by 37.5 % over pure chitosan (CS) films. Moreover, the mechanical strength of the CSGA-Fe 3+ films saw a significant increase of 124.2 %, escalating from 1.32 MPa to 17.72 MPa. Additionally, the free radical scavenging capacities of the CSGA and CSGA-Fe 3+ films rose by 279.4 % and 255.0 %, respectively, compared to the pure CS film. The UV-blocking efficacy of the CSGA-Fe 3+ films, evaluated at 365 nm, reached 84.9 %. The water contact angle of the CSGA-1.5Fe 3+ film increased by 18.08 % compared to the CS film. This study provides innovative ideas to promote the broader application of safe and multifunctional chitosan-based composite films in food preservation packaging.
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ACS Omega
·
2017
·
IF 0
Jieyu Zhang,Hongping Xu,Ling Hu,Yao Yang,Houbin Li,Chi Huang,Xinghai Liu
Novel waterborne UV-curable hyperbranched polyurethane acrylate/silica (HBWPUA/SiO2) nanocomposites were prepared by a three-step procedure and sol–gel method. 1H NMR and 13C NMR results indicate that HBWPU is successfully synthesized. Surface tension and contact angle tests both demonstrate the good wettability of the nanocomposites. Besides, the kinetics of photopolymerization of HBWPUA/SiO2 films were analyzed by attenuated total reflection-Fourier transform infrared spectroscopy, which reveals that the modified SiO2 could accelerate the curing speed of HBWPUA coatings. Thermal gravity analysis indicates that the HBWPUA/SiO2 hybrid films have a better thermal stability than the pure HBWPUA cured films. Furthermore, the hybrid films show enhanced pencil hardness, abrasion resistance, and adhesion. On the basis of the above, HBWPUA/SiO2 nanocomposites were finally applied to waterborne UV-curing flexographic printing ink, which is printed on poly(ethylene terephthalate) and glass. The nanocomposite presents good rheological behavior because the ink has a lower Z0, a higher Z∞, and the viscosity rebuild time is 375 s. Three colors (red, yellow, and blue) of ink were used to test its printing quality, the curing time was below 30 s, and the adhesion was excellent without being stripped. All of the inks show good water resistance and abrasion resistance. Moreover, the red and blue inks possess better solid densities than the value of 1.07 of yellow ink, and are 1.83 and 1.84, respectively. The current study suggests that the process has promise in applications of food packages.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Muqun Wang,Shaofeng Liang,Shuangliang Zhao,Wei Gao,Zequan Li
High-performance interlayer materials have garnered considerable interest owing to their low manufacturing costs and applicability in smart windows. In this study, a novel smart-window interlayer material capable of selective shielding against both near-infrared (NIR) and ultraviolet (UV) radiation is developed based on the light transmittance control mechanism. An excellent thermoresponsive liquid, denoted as CDs@TRL (viz., carbon quantum dots at thermal-responsive liquid), is synthesized by compositing biomass-based fluorescent carbon quantum dots (CDs) and poly(N-isopropylacrylamide) (pNIPAM) at natural ambient temperature and in an aqueous phase. Due to the characteristics of CDs and synergistic effect of hydrogen bonds, CDs@TRL exhibits a high specific heat capacity (4.41 kJ kg–1 K–1), large thermal storage capacity (264.6 kJ kg–1), and better UV–NIR-blocking properties, compared to pure pNIPAM, as well as improves the sensitivity of thermal response. When injected into a window as a liquid interlayer, CDs@TRL can intelligently adjust the light transmittance according to ambient light intensity to achieve an intelligent response. The shielding rate of a 10 mm-thick CDs@TRL composite liquid against UV radiation (200–400 nm) was more than 95% in an overcast environment with insufficient light and close to 100% in a well-lighted environment. In addition, CDs@TRL is a cost-effective material that can be prepared from a wide range of raw material sources using a simple preparation process and exhibits excellent mobility and recyclability. Because of these features, it is considered to be a promising candidate for developing energy-saving and climate-adapted smart windows.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Xiaozeng Miao,Huiwang Dai,Jianxin Chen,Jianxi Zhu
An enhanced method of hydroxyl radical generation was studied to lead a better understanding of the catalytic mechanism of α-FeOOH in UV-Fenton system. The catalyst was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption–desorption isotherms and scanning electron microscope. The Orange II degradation and hydroxyl radical concentration under different conditions were studied in detail. The results showed that the hydroxyl radical was mainly oxidizing species for Orange II degradation. And the hydroxyl radical generation included both homogeneous and heterogeneous UV-Fenton processes. In heterogeneous UV-Fenton system, the additional oxalate could increase the ratio of homogeneous UV-Fenton process for hydroxyl radical generation. In oxalate enhanced system, the peak value of hydroxyl radical concentration would increase to 11.314 μmol/L which was nearly twice as it in heterogeneous UV-Fenton system (5.978 μmol/L). The k values of Orange II discoloration and mineralization increased to 0.386 min −1 and 0.044 min −1 , which were 1.169 and 0.692 times as that in heterogeneous UV-Fenton system (0.178 min −1 and 0.026 min −1 ). After treatment, the total iron ions concentration decreased to 2.357 μmol/L in oxalate enhanced system. The results indicated that additional oxalate was a promising enhanced method for hydroxyl radical generation in heterogeneous UV-Fenton system with α-FeOOH as catalyst.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 4
Jiang Qi,Li Jia-Yi,Hu Han,Sun Jin-Hao,Cao Wei-Hong,Hu Lin-Yi,Wei Dong-Qing,Wang Jing-Gang,Zhu Jin
Bio-based 2,5-furandicarboxylic acid polyesters offer significant promise for reducing energy and environmental crises. However, their intrinsic flammability remains a critical limitation, and conventional flame-retardant strategies often compromise their mechanical properties, hindering their practical applications. Herein, a 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)-based comonomer (DDP) was used to synthesize flame-retardant poly(ethylene furandicarboxylate- co -phosphaphenanthrene) (PEFDn). The covalent integration of DDP confers intrinsic flame retardancy, avoiding the plasticization and migration issues associated with additive-type systems. Upon thermal decomposition, the DOPO-derived moieties release phosphoric acid and radical scavengers, promoting char formation and suppressing flame propagation. Furthermore, density functional theory (DFT) calculations combined with non-covalent interaction (NCI) analysis revealed that DOPO dimer molecules adopt a stable parallel-displaced π–π stacking configuration, potentially facilitating microphase separation and enhancing the energy dissipation capability. PEFD 10 achieves a UL-94 V-0 rating while simultaneously increasing impact toughness from 1.5 kJ/m 2 to 14.7 kJ/m 2 . Importantly, PEFDn maintained acceptable oxygen-barrier properties. PEFD 10 also exhibited high transparency and UV-shielding performance. The combination of intrinsic flame safety, impact-toughness resistance, UV shielding, and an oxygen barrier ensures reliable protection of electrical components and long-term operational stability. The integration of multiple critical properties within a single bio-based material represents a novel approach for enabling sustainable polymer solutions for high-performance electrical applications.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Tariq Ali,Yiwei Li,Bingjie Fang,Saleem Raza,Yeyuan Xiao
Photocatalysis can decolorize dye-laden wastewaters using light, but practical catalysts often suffer from narrow absorption, charge recombination, and stability limits. Here we synthesize a carbonate-intercalated cobalt–aluminum layered double hydroxide hosting cobalt-oxide nanocluster (CoAl-LDH/CoOx) via a one-pot hydrothermal route and evaluate its performance for dye decolorization and UV/H2O2 treatment of real textile wastewater. Under UV irradiation, CoAl-LDH/CoOx accelerates discoloration of methyl orange (MO) and Congo red (CR), following pseudo-first-order kinetics (e.g., MO: ∼98% removal at 5 mg L−1 in 100 min; CR: ∼100% at 100 mg L−1 in 100 min; kapp up to 0.14 min−1). On real textile wastewater (ADMI0 = 608.1), UV/H2O2 with 0.5 g L−1 catalyst achieved ∼80% American Dye Manufacturer's Institute (ADMI) removal in 120 min at 48.96 mM H2O2; outdoor sunlight tests removed 82.5% (raw influent) and 50.8% (biologically treated effluent) over 20 h. Scavenger tests and EPR spin-trapping implicate h+ and ˙O2− as dominant species under UV, with ˙OH contributing when H2O2 is present. Five-cycle tests indicate stable activity. The one-pot CoAl-LDH/CoOx heterostructure provides a robust, recyclable platform for interfacial charge-transfer-assisted photocatalysis on realistic effluents and motivates follow-up on mineralization and leaching.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chengzhi Zhou,Jiaqi Wang,Zongyu Yan,Zhouying Xie,Yuandong Wu,Qianwei Liang,Yanlong Sun,Ya-nan Zhang
Dissolved black carbon (DBC), particularly its optically active fraction, plays a crucial role in the photodegradation of organic pollutants. However, the transformation mechanisms of DBC's optical properties and molecular composition in UV/chlorine process remain poorly understood. In this study, we systematically investigated the photochemical evolution of rice straw-derived DBC prepared at two pyrolysis temperatures (300 °C and 500 °C) under UV/chlorine treatment, as well as their impacts on the photodegradation of acetamiprid (ACT). The results demonstrate that DBC 300 exhibited strong light absorption capacity, high aromaticity, large molecular weight, and abundant lignin-like components, whereas DBC 500 contained higher heteroatom (N, S) content, greater protein-like constituents, and enhanced reducing capacity and electron transfer capability. Under UV irradiation alone, the content of condensed aromatics, lipid-like compounds, and molecular diversity in DBC were enhanced. In contrast, chlorination reduced the light absorption capacity, humification degree, and molecular diversity of DBC. Photodegradation of ACT was primarily promoted by the generation of excited triplet DBC ( 3 DBC ⁎ ). With increasing chlorine concentration, the electron transfer capability of 3 DBC 300 ⁎ decreased, whereas that of 3 DBC 500 ⁎ increased, leading to weakened and enhanced promotion effects on ACT photodegradation, respectively. The photodegradation pathways of ACT mainly involved demethylation, hydroxylation, oxidation and C N bond cleavage. Furthermore, the photodegradation products of ACT exhibited increased toxicity toward rat and Daphnia magna , while demonstrating reduced mutagenic potential. This study provides critical insights into the photochemical transformation processes and underlying molecular mechanisms of DBC during UV/chlorine treatment.
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Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 31
·10005-10012
·
IF 7.393
Lili Li,Xiaoshuang Yu,Abdur Raheem Aleem,Xiaolin Zhang,Yue Zhao,Xinzhi Wang,Yanying Zhang,Yao Wang,Wenfei Shen,Olle Inganäs,Jianguo Tang
In this article, a natural biological porous material, from living diatoms, is used to prepare new UV-protection hybrid materials with an Eu3+-complex. By removing the organic protoplasm of living diatoms, the exoskeleton with a regular pore structure arrangement was obtained. The Eu3+-complex was chemically bonded to the exoskeleton modified by the silane coupling agent (3-aminopropyl)trimethoxy silane (APTMS). Compared with pure Eu3+-complexes, the fluorescence intensity of this hybrid material was increased by approximately 10 times. For illustrating its applications in the field of UV-protection, we mixed the USDU with polyacrylonitrile to produce flexible and transparent polymer films. The hybrid composite film (USDU@PAN) achieved partial absorption of ultraviolet light between 200 and 400 nm. At the same time, it also emits visible fluorescence and the intensity of the fluorescence is greatly increased. Therefore, the USDU@PAN film has wide application prospects in areas such as photoelectric sensors and UV-protection devices. More importantly, we transform natural organisms into materials with excellent optical properties. Therefore, it can be used in the field of UV-protection.
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