Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123082
·
IF 7.5
Zhe Xu,Jiantong Zhou,Chengfeng Liu,Weilan Zhen,Taicheng An
The peroxodisulfate (PDS)-based oxidation systems are promising for Cu(II) complex decomplexation owing to its capacity to harness the self-enhanced decomplexation (SED) effect of Cu(II) complexes. This phenomenon was conventionally attributed to liquid-phase autocatalysis via Fenton-like reactions between daughter Cu(II) species and PDS. However, this frequently adopted hypothesis is inconsistent with the actual catalytic activity of Cu(II) species and has been challenged by our preliminary results. Herein, we revisit the decomplexation of copper(II)-ethylenediaminetetraacetate (Cu(II)-EDTA) in UV/PDS system, with particular emphasis on correcting the catalytic behaviors of Cu species and clarifying the indispensable role of UV-irradiation in SED effect. Both acidic and alkaline conditions exhibit significant SED effect, but we reveal a pH-dependent SED mechanism that is fundamentally different from the prevailing liquid-phase autocatalysis mechanism. Under acidic conditions, Cu(II) complexes exhibit enhanced catalytic capacity with decreasing ligand coordination strength, primarily stemming from the activation of PDS by Cu(I) species produced via the irradiation-induced intramolecular charge transfer; In alkaline environments, only liberated Cu(II) substantially contribute to SED effect via spontaneous hydrolysis, forming nanostructured CuO after aging, which activates PDS through heterogeneous Fenton-like processes. While acidic conditions demonstrate faster decomplexation, alkaline-generated solid products facilitate multi-cycle treatment efficiency and alkaline conditions also exhibits stronger resistance to chloride. This work corrects the misinterpretation of SED mechanism in UV/PDS/Cu(II)-EDTA system, and provides a fundamental and accurate mechanistic basis for the efficient treatment of copper-containing organic wastewater by PDS-based processes.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Junjie He,Mingfei Chu,Jianqiang Pan,Lijuan Deng,Yiyao Wang,Wenjun Huang,Kehao Jiang,Fangli Sun,Yan Zhang
As an important thermosetting resin, epoxy resin can be impregnated into wood porous structures and cured upon heating to produce high-performance or functional wood composites. To obviate potential environmental hazards associated with volatile organic compound (VOC) emissions during processing, a waterborne epoxy resin (WEP) system containing lignin-based curing agent was designed in this work. The aminated lignin (AL) obtained via the Mannich reaction was well dispersed in the WEP matrix, forming stable waterborne epoxy emulsions. Following the curing reaction between WEP and AL, the resulting films exhibited good chemical stability, indicative of the formation of AL-WEP crosslinked network structures. Dimensionally stable and UV-resistant wood composites were achieved via the impregnation and in-situ curing reaction of AL-WEP emulsion. The anti-swelling efficiency of the wood composites reached 37.9%, and the flexural strength and modulus increased by 59.6% and 49%, respectively, relative to the unmodified wood sample. Furthermore, the wood composites demonstrated favorable UV blocking and resistance performance, attributable to the incorporation of lignin chains containing aromatic skeletons and phenolic hydroxyl groups into the epoxy network and wood structures. This work effectively integrated the respective merits of lignin and WEP into wood, thereby providing a new strategy for the preparation of wood composites with the ability to resist deformation and UV radiation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Sen Qun,Song Liu,Lijia Yang,Meiru Du,Jiani Zhou,Yu Zhu,Ying Ling,Liping Yuan,Shaohua Zeng,Jun Guan
Epoxy-functionalized carbon dots (OCDs) are synthesized via a hydrolytic condensation. • OCDs provide robust chemical interfacial bridges between PLA and PBAT. • Nanoscale OCDs cores refine the phase morphology via physical interactions. • Interfacial compatibility between PLA and PBAT is enhanced via a synergy of physical and chemical interactions. • OCDs give PLA/PBAT-based composites superior UV resistance. Biodegradable polymers like poly(lactic acid) (PLA) and poly(butylene adipate- co -terephthalate) (PBAT) hold significant promise for sustainable medical materials; however, their widespread application, particularly in demanding fields such as medical packaging materials, is hindered by inherent challenges including poor interfacial compatibility in blends and a general lack of functional properties like ultraviolet (UV) resistance. To address these limitations, this work introduced an innovative interfacial engineering strategy utilizing epoxy-functionalized carbon dots (OCDs) as a multifunctional compatibilizer for blending PLA and PBAT. The surface epoxy groups of OCDs underwent in-situ ring-opening reactions with terminal functional groups of PLA and PBAT during melt processing, establishing robust covalent bridges that fundamentally enhanced interfacial adhesion. This chemical compatibilization, synergized with the nanoscale effect of well-dispersed OCDs, led to a remarkable improvement in mechanical properties, with optimal increases of 47.7% in tensile strength and 23.4% in tensile modulus. Simultaneously, the intrinsic UV absorption of OCDs conferred exceptional UV-resistant capability to the PLA/PBAT-based composite, with absorption intensities at key wavelengths enhanced by up to 775%. Furthermore, the PLA/PBAT-based composites demonstrated modified thermal degradation behavior and improved melt strength. This multifunctional OCDs-filled PLA/PBAT composite integrated enhanced mechanical properties and excellent UV-resistant performance, demonstrating significant potential for advanced medical applications.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yizhuo Li,Bojun Zhang,Jinchan Zhao,Zhenyu Dai,Shiliang Mei,Wanlu Zhang,Sinong Wang,Ruiqian Guo
Yellow-emissive carbon quantum dots were fabricated via one-pot hydrothermal method with base-catalyzed molecular fusion • YCQDs@PVA films enable strong absorption of 200–460 nm light, blocking photon energy inducing dye chromophore degradation • Elucidates the fading of dyed cultural relics and the protective mechanism of YCQDs@PVA films at the molecular level • Films exhibit high light-shielding efficiency, biocompatibility, and flexibility for non-invasive heritage protection As essential components of cultural heritage, dyed artifacts preserve valuable historical information. However, the inherent instability of natural dyes makes their long-term preservation challenging, as they are highly susceptible to photodegradation and oxidative damage, leading to fading and loss of cultural value. In this work, yellow-emissive carbon quantum dots (YCQDs) with an emission peak at 550 nm were synthesized via a one-pot hydrothermal method using a base-catalyzed molecular fusion strategy. The YCQDs exhibited strong absorption in the ultraviolet (UV, 200–400 nm) and high-energy blue light (HEBL, 400–460 nm) regions, effectively shielding dyes from light-induced damage. YCQDs were further incorporated into polyvinyl alcohol (PVA) to form YCQDs@PVA composite films, which were applied to gardenia-dyed paper colored with a representative natural dye. The films displayed excellent protection under UV, white LED and blue LED aging conditions. Ultraviolet-visible (UV–Vis) absorption spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, and liquid chromatography-mass spectrometry (LC-MS) analyses revealed the main chromophores of gardenia yellow and further elucidated that the YCQDs@PVA films effectively suppressed oxidative cleavage and cis-trans isomerization of conjugated double bonds. This study proposes a novel strategy for employing carbon quantum dots for the long-term preservation of dyed cultural relics, highlighting the promising potential of nanocomposite materials in heritage conservation. Download: Download high-res image (174KB) Download: Download full-size image
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ACS Applied Engineering Materials
·
2026
·
IF 3.5
Ruoxin Fan,Yan Miao,Qingkang Wang,Kaiyu Wu
Terahertz (THz) filters are pivotal for sensing and imaging, yet their performance on flexible substrates is often hindered by scattering losses from rough metal–polymer interfaces. This work introduces a UV-release tape (UV-RT) assisted transfer strategy that directly addresses this challenge by enabling the lossless transfer of metallic metagratings from silicon to a flexible polymer, thereby preserving an atomically smooth functional interface with a roughness of Rq ≈ 0.245 nm. This ultrasmooth surface is fundamental to the demonstrated high-performance flexible device, which combines multiple device-level functionalities on a single platform, including passive switching between bandpass and bandstop filtering via geometric design, distinct polarization-selective resonances, and active mechanical frequency tuning with a high sensitivity of 18.65 GHz %–1. By providing a versatile transfer route to atomically flat, terahertz photonics with well-defined and stable resonant characteristics, the UV-RT method supports flexible terahertz photonic structures for resonance-based filtering and tuning.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zhaoxiang Liu,Guihua Yang,Haiying Wei,Shoujuan Wang,Zhongming Liu,Chenglong Fu,Shihao Su,Fangong Kong
Acid precipitation is a widely adopted method for lignin recovery from pulping black liquor, where the precipitation parameters determine the structural and physicochemical characteristics of the isolated lignin. Given the structural complexity and heterogeneity of lignin, the impact of acid type on its molecular structure and surface chemistry remains unclear. This study investigates how differences in protonation kinetics among various acids influence lignin particle morphology and their interfacial behavior in cellulose composite films. The results indicate that lignin precipitated using HCl forms spherical particles with size (190 ± 51.1 nm), good monodispersity (PDI = 0.072) and long-term aqueous stability. This is attributed to the strong acidity of HCl, which enables rapid H⁺ release and complete protonation of lignin molecules. Conversely, the weaker acidity of ethanoic acid (HAc) leads to a more gradual protonation, resulting in hierarchically structured particle aggregates with a broader size distribution (240 ± 111.6 nm, with many nanoparticles <50 nm). In addition, HCl-lignin and HAc-lignin composite films showed 38.4% and 39.3% increases in elongation at break over pure cellulose films, along with substantial UV-blocking efficiency enhancements of 540% and 745%.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Lijuan Chen,Yulin Xu,Yufei Fang,Xiaoyang Qu,Zhiying Yu,Ling Dong,Jianbo Chen
Red yeast rice (RYR) is a traditional fermented product produced by cultivating rice with the filamentous fungus Monascus purpureus . It has been widely utilized in East Asia both as a natural food colorant and as a lipid-lowering herb. Rapid quality assessment is critical for the production, transaction and utilization of RYR. Since empirical evidence suggests that the chromatic properties of RYR correlate closely with its quality, UV–Vis spectrophotometric analysis at specific wavelengths has become a common proxy for rapid quality evaluation of RYR. However, there has been no universal consensus on the selection of these wavelengths. In this study, an active pharmaceutical ingredient (API)-correlated wavelength selection strategy was proposed to ensure analytical accuracy and biological interpretability of the selected UV–Vis wavelengths for the rapid quality assessment of RYR. Integrated bioinformatic analysis confirmed that Monascus pigments (e.g., monascin, rubropunctatin, rubropunctamine) and monacolin K were the dominant pharmacologically active components of RYR. Notably, both the profiles and concentrations of these pigments varied significantly across RYR samples from different manufacturers. Through systematic correlation analysis and principal component analysis (PCA), three optimal characteristic wavelengths were identified: 570 nm (associated with monascin and rubropunctamine), 450 nm (associated with rubropunctatin), and 230 nm (roughly associated with monacolin K). This work not only establishes chemically rational, API-informed UV–Vis wavelengths for standardized RYR quality assessment, but also offers a transferable methodological framework for the rapid quality control of other pigment-rich fermented products.
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ADVANCED ENGINEERING MATERIALS
·
2026
·
IF 3.6
Yuxuan Wang,Zhenjie Wang,Qingfeng Hao,Xiyu Song,Yunxiang Yin,Hongjuan Zhang,Ruyi Xie
Nowadays, superhydrophobic textiles are widely applied in various fields such as oil–water separation, ultraviolet protection, and self-cleaning surfaces. However, the development of multifunctional textiles that integrate durable performance with wearing comfort remains a significant challenge. To address this issue, a low-liquid-supply preparation strategy was proposed. Superhydrophobic polyester fabrics were fabricated by atomization spraying zinc nitrate hexahydrate and 2-methylimidazole onto the fabric surface, followed by the in situ introduction of polydimethylsiloxane at room temperature. The scanning electron microscopy images showed the formation of ZIF-8/PDMS rough structures on the fiber surface without blocking the original gap structures of the PET fabric. The modified PET fabrics exhibited robust superhydrophobicity even after 100 washing cycles and 10 000 abrasion cycles. Moreover, the superhydrophobic fabrics exhibited excellent self-cleaning and antifouling properties, remarkable ultraviolet protection performance, and high oil/water separation efficiency. Notably, the UPF value of the modified fabric reached 782.68, demonstrating exceptional UV protection by blocking 99.9% of ultraviolet radiation. The oil–water separation efficiencies of the prepared PET fabric reached 97.8% for n -hexane and 98% for chloroform even after 20 cycles. Despite the functional modifications, the PET fabric retains favorable air permeability. This method offers a promising approach for achieving a balance between multifunctionality and wearing comfort in textile design.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Yibo Qin,Pengxiang Shi,Lijian Sun,Dongmei Yang,Shujun Li,Xueren Qian
In this study, an anti-photooxidative green food packaging material based on carboxymethyl cellulose (CMC) and vanillin (VA) was successfully fabricated, with simultaneous antibacterial and antioxidant properties. The ultraviolet-shielding (UV-shielding) performance of the composite films was systematically evaluated at pH 5.0, 7.0, 8.5, and 11.5, revealing that alkaline conditions markedly enhanced UV-shielding capacity of the films. In comparison with the control group, the incorporation of VA significantly reduced the UV transmittance of the composite films while maintaining excellent transparency. Specifically, the modified film achieved 100% UV-shielding efficacy for UVC and UVB, and 99.7% for UVA, while maintaining a transparency of over 80%. They demonstrated significant antibacterial activity against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). Additionally, the films exhibited robust antioxidant capacity, with 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonate) (ABTS + ) radical scavenging ratios of 55.34–99.10% and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging ratios of 14.69–44.60%. Practical validation experiments revealed that the composite films effectively mitigated UV-induced degradation of photosensitive nutrients (anthocyanins and vitamin C) and extended the shelf life of strawberries to 7 days at 25 °C (vs. 3–4 days for unpacked group), while retaining 30% more vitamin C. In summary, this study offers a green, cost-effective and sustainable approach to preparing high-performance UV-shielding food packaging films.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Yunpeng Xu,Dongbo Zhang,Shuping Mei,Jing Yu,Qiu Liu,Jicheng Yu
Photodeposited Pt/TiO₂ rings degraded 94.98% of LEV within 40 min. • Pt modification enhanced UV activity with low Pt leaching. • Dark controls and scavenger tests supported ROS-driven degradation. • LC–MS detected 18 products and supported five tentative pathways. • QSAR predicted reduced bioaccumulation for most products. A recoverable Pt/TiO 2 porous ceramic composite was prepared by photodeposition for ultraviolet (UV)-driven degradation of levofloxacin (LEV). The catalyst was characterized by structural, microscopic, surface, optical and elemental analyses, and its activity, stability, reactive species, transformation products and predicted toxicity were evaluated. Pt deposition preserved the anatase/rutile structure of P25 TiO 2 , introduced dispersed metallic Pt, enhanced long-wavelength absorption and improved LEV removal. Under optimized conditions (1.0 wt% Pt, 2.0 g/L catalyst, pH 9.0), 94.98 ± 0.56% of LEV was degraded within 40 min, outperforming TiO 2 . The composite retained high activity over six cycles with low Pt leaching. Scavenger tests indicated that •OH was the dominant reactive species, with h + and •O 2 − also contributing. LC–MS detected 18 transformation products and supported five tentative degradation pathways. Quantitative structure–activity relationship (QSAR) predictions predictions suggested reduced bioaccumulation and lower mutagenicity/developmental-toxicity concerns for several terminal products, although experimental toxicity validation remains necessary.
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Foods
·
2025
·Vol. 14
·期 13
·2192
·
IF 5.1
Aihemaitijiang Aihaiti,Yuanpeng Li,Xinmeng Huang,Yuting Yang,Ailikemu Mulati,Jiayi Wang
Pomegranates are rich in nutrients and classified among ready-to-eat fruits and vegetables. Although this ready-to-eat produce offers convenience, it presents risks associated with pathogenic microorganisms, highlighting the need for pre-sale disinfection. Ultraviolet light-emitting diodes (UV-LEDs) constitute an innovative non-thermal processing technology for food products, offering reduced heat generation and lower energy consumption compared to traditional ultraviolet (UV) irradiation methods. This study analyzed the effects of UV-LED technology on pomegranate seed quality over 0 to 5 days of storage. The results demonstrated significant increases in anthocyanins, polyphenols, ascorbic acid, and the antioxidant capacity in pomegranate following treatment, peaking on day 3. In contrast, the control group showed declining trends. After treatment, the aerobic mesophilic counts and counts of mold and yeast levels during storage measured between 2.73–3.23 log CFU/g and 2.56–3.29 log CFU/g, respectively, significantly lower than the control group. Non-targeted metabolomic analysis showed that UV-LED treatment prompted modifications in the biosynthetic pathways of flavonoids, flavonols, and anthocyanins. The expression of peonidin-3-O-rutinoside chloride increased by 46.46-fold within the anthocyanin biosynthesis pathway. In conclusion, UV-LED treatment represents a potential approach to the disinfection of ready-to-eat fruits and vegetables.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Li-Wei Su,Tian-Yu Su,Zheng Zhao,Ming-Hao Liu,Rui-Guang Xing,Xin Ge,Li-Na Jia,Ya-Hui Li,Jin-Xiao Bao,Gao-Fei Pan
High fire safety, aging resistance, and excellent mechanical properties are particularly important for polyurethane elastomers in electronic encapsulation and membrane materials. Here, we synthesized a polyurethane elastomer material with enhanced mechanical properties, as well as better fire safety and UV aging resistance through the design of nitrogen and phosphorus-containing elemental chain extenders (BFPP and AHMT) and the incorporation of cerium oxide nanoparticles. Sample APU-BFPP-4 spiked with 1.25% AHMT, 2.5% BHPP, and 5% cerium oxide nanoparticles can pass the UL-94 V-0 rating and the LOI increases to 27.5%. The PHRR and THR of the APU-BFPP composites were lower than those of PU by 6.42% and 14.56%, respectively. Meanwhile, the addition of cerium oxide nanoparticles can effectively improve the UV shielding and mechanical properties of polyurethanes; the APU-BFPP composites can achieve 100% UV shielding in the full UV band, and the mechanical properties can reach 30 MPa. In order to investigate the flame-retardant mechanism, the condensed phase and gas phases of PU elastomer combustion have been analyzed; the results showed that the flame-retardant mode of the APU-BFPP composites was mainly dominated by the trapping of fuel free radicals and the carbon layer blocking effect. Compared with the flame-retardant PU composites that have been reported, APU-BFPP composites have achieved a better balance between efficient flame retardancy, UV protection properties, and good mechanical properties, which makes it perform well in electronic encapsulation and membrane materials.
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危险品化学品经营许可证（带存储）