APPLIED SPECTROSCOPY
·
2016
·
IF 1.798
Xing Dong,Yunchang Fan,Peng Yang,Jichuan Kong,Dandan Li,Juan Miao,Shaofeng Hua,Chaobing Hu
The inhibitory effects of nine ionic liquids (ILs) on the catalase activity were investigated using fluorescence, absorption ultraviolet-visible spectroscopy. The interactions of ILs and catalase on the molecular level were studied. The experimental results indicated that ILs could inhibit the catalase activity and their inhibitory abilities depended on their chemical structures. Fluorescence experiments showed that hydrogen bonding played an important role in the interaction process. The inhibitory abilities of ILs on catalase activity could be simply described by their hydrophobicity and hydrogen bonding abilities. Unexpected less inhibitory effects of trifluoromethanesulfonate (TfO−) might be ascribed to its larger size, which makes it difficult to go through the substrate channel of catalase to the active site.
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2026
·Vol. 27
·期 5
·2210
·
IF 5.6
Myungho Lee,Anuja P Rananavare,Youn Suk Lee
Fluorine-free paper coatings with water- and oil-resistance properties have gained considerable attention for sustainable food packaging applications. In this study, a dual-layer coating based on chitosan (Chi) and acrylated epoxidized soybean oil (AESO), both derived from renewable and natural resources, was applied to kraft paper. The ultraviolet-cured AESO top layer formed a dense crosslinking network, while the Chi interlayer promoted strong interfacial adhesion with the kraft paper through hydrogen bonding, effectively restricting fluid penetration. The Chi/AESO 40 /kraft paper showed markedly enhanced water repellency and oil resistance, with a reduced Cobb 600 value of 16 g m −2 and kit rating of 12. Thermogravimetric analysis demonstrated improved thermal stability, and mechanical testing results revealed enhanced packaging-relevant strength, with the tensile strength increasing from 33 to 40 MPa and tensile index increasing from 45 to 60 kPa·m 2 g −1 ; furthermore, the burst strength and index improved from 260 to 330 kPa and from 3.2 to 4.0 kPa·m 2 g −1 , respectively. Food contact tests conducted using French fries confirmed the effective barrier performance of the Chi/AESO/kraft paper, highlighting its potential for use in sustainable paper-based food packaging applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zijun Dong,Feng Wang,Xiangsheng Chen,Jingyun Fang,Xuechuan Li,Ting Zhou
UV/PAA achieves efficiency ACV removal across a broad pH. • Both •OH and R-C• synergistically drive ACV oxidation. • DFT and LC-MS/MS identify distinct pathways yielding low-toxicity products. • The dual-function system highly inactivates chlorine-resistant B. subtilis . Acyclovir (ACV) is an emerging antiviral contaminant posing risks to aquatic ecosystems. This study proposed the application of the UV/peracetic acid (UV/PAA) process as a novel dual-function technology for simultaneous ACV elimination and water disinfection. The UV/PAA process achieved 97.6% ACV removal within 30 min under the optimized conditions (2.5 mM PAA and 1800 μW/cm 2 UV intensity) while maintaining stable degradation performance across a broad pH range (3.0–11.0). Mechanistic analysis indicated that ACV degradation was governed by the combined action of hydroxyl radicals (•OH) and carbon-centered radicals (R-C•), with •OH serving as the dominant reactive species (57.4–65.6%). Density functional theory (DFT) coupled with LC-MS/MS revealed distinct addition and substitution pathways that structurally transform ACV into low-toxicity products. Furthermore, addressing a critical biosecurity challenge, the process exhibited exceptional biocidal synergy, achieving a 3.79 log inactivation of chlorine-resistant Bacillus subtilis spores. Overall, the results provided mechanistic insight into ACV degradation by UV/PAA and supported its potential application for the simultaneous control of pharmaceutical contaminants and microbial risks in water treatment. Download: Download high-res image (255KB) Download: Download full-size image
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PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Hui-Hui Gao,Fang Wang,Si-Qi Chen,Cheng-Li Zhang,Xiang-Xin Xiao,Shu Tian,Guang-Ming Lu,Hui Zhao,Fei Song,Yu-Zhong Wang
Waterborne polyurethane (WPU) coatings are widely used in building and infrastructure applications owing to their environmental friendliness and balanced mechanical properties. However, simultaneously achieving durable flame retardancy, water repellency, and UV resistance in waterborne systems remains challenging due to the intrinsic hydrophilicity of WPU and the migration of conventional flame retardants. Here, we propose a single-additive strategy to construct multifunctional WPU coatings by encapsulating a P N flame retardant within a tailored silane coupling agent and a polydimethylsiloxane (PDMS) shell. This design forms a stable core-shell architecture and establishes an organosilicon-mediated P-N-Si synergistic system, imparting high flame retardancy (UL-94 V-0 rating and a limiting oxygen index >33%) while enhancing interfacial compatibility and structural stability within the coating matrix. Surface enrichment of hydrophobic siloxane segments lowers surface energy and limits water penetration, thereby suppressing additive leaching during prolonged water immersion. The resulting coating maintains a water contact angle above 110° after 96 h of immersion while preserves UL-94 V-0 performance. In addition, the coating demonstrates strong adhesion, UV resistance, and abrasion durability. This work establishes a practical single-additive design strategy for multifunctional WPU coatings and provides a scalable route toward durable protective materials for demanding service environments.
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ARCHIVES OF MICROBIOLOGY
·
2026
·Vol. 208
·期 8
·385
·
IF 3.4
Wang Jiahui,Zhu Yuzhang,Liu Tao,Hong Xiangyu,Liu Mi,Zhou Rui,Li Xianke,Jing Mingguo,Yang Lifang
The antibacterial strategy that utilizes ultraviolet-A (UVA)-irradiated natural photosensitizers is promising, being particularly effective against multidrug-resistant pathogens with high bactericidal efficiency and minimal resistance-inducing risk. Rutin is a natural flavonoid with wide availability, low cytotoxicity, and diverse pharmacological activities, making it a promising photosensitizer; however, its UVA-induced photodynamic antibacterial properties remain underexplored. The aim of this study is to systematically evaluate the antibacterial efficacy and mechanism of UVA-Rutin against foodborne Escherichia coli O157:H7 . In the study, Fourier transform infrared spectroscopy and Raman spectroscopy were used to characterize structural alterations in rutin post-UVA irradiation, focusing on functional groups relevant to photodynamic activity. Antibacterial efficacy was assessed via standardized assays including minimum inhibitory concentration (MIC) determination, while biocompatibility was evaluated using MTT cytotoxicity assays. To confirm the antibacterial effects, physiological/structural perturbations of bacteria were measured, including cell membrane integrity, DNA damage, motility, biofilm formation, and extracellular polysaccharide (EPS) production, as well as the generation of intracellular reactive oxygen species (ROS) measured using fluorescent probes. Reverse transcription quantitative polymerase chain reaction was used to analyze key virulence- and quorum sensing-related genes ( luxS , phoP , qseB , qseC ). Results showed that UVA-induced structural changes enhanced the photosensitizing activity of rutin. UVA-Rutin exhibited significant antibacterial activity (low MIC) and good biocompatibility, triggering the generation of massive intracellular ROS, disrupting cell membranes, inducing DNA damage, impairing motility, inhibiting biofilm/EPS production, and downregulating target genes. Collectively, UVA-Rutin exerts potent antibacterial effects via ROS-mediated structural/functional disruption and virulence gene regulation, highlighting its potential as a novel food industry antibacterial agent.
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高影响因子
Water
·
2026
·Vol. 18
·期 7
·867
·
IF 3.5
Ying Lu,Wenqiang Yang,Linyi Wang,Yinghao Qin,Baomin Chen,Zhenfang Huang,Qingge Feng,Wangye Lu,Chenhong Liu,Dongbo Wang
The removal of ammonia nitrogen (NH4+-N) using advanced oxidation processes (AOPs) has garnered increasing attention in wastewater purification. However, the application of the UV-activated persulfate (PS) system for treating NH4+-N wastewater is limited by the low reaction rate between NH4+-N and the reactive species (·OH and SO4·−) generated in the system. In this study, common chloride ions (Cl−) were employed to enhance the removal of NH4+-N in the UV/PS process; when the system conditions were pH = 7, [PS]0= 10mM, [Cl−]0= 35 mM, 30 mg/L NH4+-N was completely degraded within 40 min. The total nitrogen removal rate was 75.50%, and the reaction rate constant increased from 0.0026 min−1to 0.0801 min−1. The introduction of Cl−led to the generation of reactive chlorine species (RCS) in the system that could efficiently oxidize NH4+-N over a wide pH range (3–9), and the RCS, which efficiently oxidized NH4+-N across a wide pH range (3–9). Quenching experiments confirmed that these RCS were gradually produced through the activation of Cl−by ·OH and SO4·−. The common anions present in water bodies had little impact on the degradation performance of NH4+-N in the UV/PS/Cl−system. Overall, the UV/PS/Cl−system proposed in this study offers an effective approach for the efficient removal of NH4+-N.
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ChemSusChem
·
2026
·Vol. 19
·期 8
·e70667
·
IF 5.9
Heejin Yang,Ahyeon Jo,Sungju Yu,Chang-Gu Lee,Gyu Leem
Despite the increasing use of azoles, comparative studies on their degradation and mineralization across oxidative systems remain limited. This study systematically examined the degradation and mineralization behaviors of four representative azoles, benzotriazole (BTA), 5-methylbenzotriazole (5MBTA), triazole (TA), and pyrazole (PR), in UV-activated persulfate processes. Although all azoles were rapidly degraded, mineralization efficiencies differed markedly between peroxymonosulfate (PMS) and peroxydisulfate (PDS) and were strongly influenced by molecular structure. PR and TA achieved near-complete mineralization within 30 min, whereas BTA and 5MBTA showed limited total organic carbon removal, particularly in UV/PMS. Scavenger and probe tests indicated that BTA degradation was dominated by singlet oxygen, while 5MBTA proceeded through both singlet oxygen and electron-transfer pathways. Electrochemical analysis confirmed that PMS facilitated electron transfer more effectively than PDS, explaining differences in oxidation behavior. pH tests showed that alkalinity reduced mineralization in UV/PDS but enhanced it in UV/PMS through SO 5 2− -mediated electron transfer. Both systems maintained strong performance under varying pollutant levels, oxidant dosages, and realistic water matrices. Overall, degradation followed PR > TA > 5MBTA > BTA. These findings clarify structure–reactivity relationships in azole oxidation and highlight UV/PMS and UV/PDS as promising and sustainable advanced treatment technologies for azole-contaminated wastewater. Graphical The UV-activated persulfate process rapidly decomposes azoles, while mineralization depends on oxidant type and molecular structure. PR and TA achieve high mineralization via O 2 •- pathways, whereas BTA and 5MBTA show limited mineralization dominated by 1 O 2 . Notably, 5MBTA exhibits enhanced electron transfer and improved ROS generation in UV/PMS under alkaline conditions.
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高影响因子
Inorganics
·
2026
·Vol. 14
·期 9
·235
·
IF 3.4
Zhengrong Xia,Rongqing Li,Fangfang Liu,Yue Tong,Wang Zhao,Mingjun Song,Weiwei Zhou
Near-ultraviolet-excitable red phosphors with high thermal stability are desirable for phosphor-converted LED applications, including potential plant-lighting applications. Herein, Sm3+- and Eu3+-activated Na3YB8O15phosphors were synthesized by a high-temperature solid-state reaction. Among the investigated compositions, the optimal activator contents were identified asx= 0.02 for Na3YB8O15:xSm3+andy= 0.70 for Na3YB8O15:yEu3+, with concentration quenching in both series mainly governed by dipole–dipole interactions. In the Sm3+/Eu3+co-doped phosphors, the emission color shifted from orange-red toward red as the Eu3+content increased. At 433 K, the Sm3+-doped, Eu3+-doped, and Sm3+/Eu3+co-doped samples retained 119.7%, 93.4%, and 102.3% of their room-temperature integrated emission intensities, respectively. The high thermal stability may be attributed to the structural characteristics of the host, its wide optical band gap, and the temperature-dependent redistribution of Stark and phonon-assisted emission components. A phosphor-converted LED fabricated using Na3YB8O15:0.02Sm3+,0.01Eu3+and a commercial 400–405 nm, 5 W near-UV LED chip produced multiband emission that partially overlapped with the absorption bands of both chlorophylls and the PRand PFRforms of phytochrome. These results suggest that Sm3+/Eu3+-activated Na3YB8O15is a promising thermally robust, spectrum-adjustable red phosphor for LED applications.
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JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Bingjie Han,Yuxin Huang,Xuan Liu,Yuanyuan Bao,Shujing Li,Zhaohui Qu,Yongbo Lyu,Ke Wu
At present, the widespread biomedical application of cerium oxide nanoparticles (CeO 2 NPs) is still limited due to their tendency to aggregate in biological fluids, which reduces their specific surface area and diminishes their mimetic enzyme activities (e.g., catalase- or superoxide dismutase-like functions). In this work, ultra-small CeO 2 NPs modified by biodegradable glycerol (GCNs) were synthesized using a facile co - precipitation method at ambient temperature. The effect of glycerol modification on the physicochemical properties of ceria nanoparticles was evaluated, and it is noteworthy that the size of the GCNs decreases gradually from (8.42 ± 0.03) to (2.66 ± 0.02) nm, along with the resulting dispersibility in water improving inversely as the percentage of glycerol addition increases. In addition, the modification of glycerol also has a significant impact on the surficial electronic structure of GCNs. Compared to the unmodified CeO 2 counterparts (Ce Naked), the oxygen vacancies and Ce 3+ content of GCN–6 (66.6 wt% glycerol-modified) can be remarkably enhanced to almost twice higher than that of Ce Naked. As a result, the antioxidant activity towards scavenging 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), superoxide, and hydroxyl free radicals has been significantly increased for GCN–6. In addition, HaCaT cells derived from human keratinocytes were employed to assess the cytotoxic effect and biocompatibility of GCN–6, and the HaCaT cell viability is not inhibited when the concentration of GCN–6 is less than 0.625 mg/mL. Furthermore, a reactive oxygen species (ROS) generation model was established using UVB irradiation to investigate the in vitro protective effect of GCN–6 on ROS-induced cell death. GCN–6 is proven to efficiently suppress the ROS production from oxidative stress in HaCaT cells stimulated by UVB radiation at a biocompatible concentration, indicating that the glycerol-modified GCN–6 enhances HaCaT cell survival by eliminating excessive intracellular ROS, and further providing a superior photoprotection effect against harmful UV exposure. These results suggest that surface engineering of nanoceria using biocompatible glycerol can boost a high Ce 3+ ratio, thus exhibiting potential application in protecting from oxidative stress-associated skin damage, and is promising for widespread use in sunscreens as an additive UV-shielding ingredient.
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高影响因子
Science China-Materials
·
2025
·Vol. 68
·期 11
·4263-4272
·
IF 7.4
Sun Zhe,Chen Liwei,Dou Yingying,Yang Yabin,Tian Xuelin
Transparent superhydrophobic coatings hold significant promise for diverse applications but face challenges in balancing optical performance with mechanical robustness. Here, we develop a multifunctional coating by integrating precision-engineered subwavelength nano-cone arrays, UV-curable polyurethane (Norland optical adhesive, NOA) matrices, and a low-friction perfluoropolyether (PFPE) monolayer. Fabricated via nanosphere lithography and nanoimprinting, the coating demonstrates excellent superhydrophobicity (static contact angle: 165°, sliding angle: 2°), and achieves 92% visible-light transmittance, 3% reflection reduction, and a haze as low as 0.4%. Crucially, superhydrophobicity of the coating can be maintained under harsh conditions, including 18,000 abrasion cycles (20 kPa), 24-h high-speed water jets (2 bar), and 45 tape-peeling tests. Finite element analysis reveals that nano-cone geometry minimizes stress concentration, while NOA’s balanced mechanical properties enhance durability. The high flexibility of the coating ensures compatibility with curved surfaces for diverse substrates. This scalable approach overcomes the durability-transparency trade-off, enabling promising applications in self-cleaning optics, solar panels, and flexible electronics.
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BIOMACROMOLECULES
·
2025
·
IF 5.4
Yanhong Song,Yueze Hong,Jun Deng,Haoyu Zou,Jianyu Xin,Fanjun Zhang,Qing Jiang,Yunbing Wang
Phakic intraocular lenses (pIOLs) are widely used for myopia correction, but face challenges such as unfolding, displacement, glistenings, and bioadhesion. To address these issues, various transparent BPH polymers were synthesized by integrating hydrophilic poly(ethylene glycol) methyl ether methacrylate (PEGMMA) with hydrophobic benzyl methacrylate (BzMA) and 2-hydroxy-4-(methacryloyloxy)benzophenone (HMBP). The prepared BPH materials exhibit high transparency, a tunable refractive index, and UV-filtering properties. With the integration of PEGMMA, the polymers exhibit a decreasing glass transition temperature (Tg) and modulus and an interesting hydration-induced rigidification due to microphase separation triggered by water uptake of hydrophilic PEG chain segments. This characteristic simultaneously endows the BPH pIOLs with the foldability essential for small-incision implantation and the rigidity required for enhanced stability after implantation. PEGMMA introduction also reduces glistenings and enhances hydrophilicity, improving resistance to protein, cell, and bacterial adhesion. In vitro cytotoxicity and in vivo subcutaneous implantation confirm their biosafety. The UV-filtering BPH platform resolves the foldability–stability trade-off and suppresses glistenings and bioadhesion, representing a promising option for pIOLs.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Xueqian Yan,Jin Qian,Xiangjun Pei,Lihong Zhou,Rui Ma,Mingkuan Zhang,Yufei Du,Linqin Bai
In this study, a magnetic NiFe 2 O 4 /MWCNTs/BiOI composite were fabricated and applied for enhanced and sustainable photocatalytic degradation of doxycycline (DOX) under UV light irradiation. The as-synthesized material was characterized by a series of techniques and its photocatalytic property was assessed via a couple of batch tests. With the pH at 3.0 and NiFe 2 O 4 /MWCNTs/BiOI loading of 1.5 g L −1 , the DOX degradation (at 45 mg L −1 ) efficiency could achieve 92.18% with the reaction rate constant k of 0.0072 min −1 . The high mineralization of DOX suggests the strong oxidation of both the parent pollutant and the intermediary products in the ternary catalyst system. DRS spectra indicated that compared with BiOI , the introduction of NiFe 2 O 4 and MWCNTs reduces the band gap energy of the NiFe 2 O 4 /MWCNTs/BiOI. The quenching test illustrates that h + , OH and O 2 − all functioned in the developed photocatalytic system, where O 2 − and h + play the dominant roles in DOX degradation. The more efficient electron-h + separation and more oxidizing species induced by UV light resulted in the significant improvement of DOX abatement in the developed coupling system compared with that on either BiOI or NiFe 2 O 4 /MWCNTs. The magnetic property of NiFe 2 O 4 /MWCNTs/BiOI enables its easy separation of the solid catalyst from the reaction solution and the sustainable application in the photocatalysis . Based on the intermediates of DOX decomposition identified by UPLC-MS, the possible degradation routes were proposed accordingly.
研究领域:
环境化学
·
材料科学
·
光催化
·
水污染治理
·
纳米复合材料
·
药物降解
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危险品化学品经营许可证（带存储）