NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 25
·10352-10358
·
IF 3.288
Danlin Bu,Na Li,Yu Zhou,Hengyu Feng,Fei Yu,Chunxia Cheng,Ming Li,Linghan Xiao,Yuhui Ao
N-Halamine-based antibacterial materials are widely used due to their excellent characteristics. However, the N–Cl bonds in N-halamine-based materials are not stable under UV light irradiation so that they are difficult to recover and reuse. Here, a kind of N-halamine-immobilized Fe3O4@SiO2@TiO2(F@S@T-Cl) nanoparticles were prepared. In addition, the UV stability and regeneration capacity were also studied after variable time exposure to UV light. The results showed that nanoparticles have great antibacterial properties against Staphylococcus aureus and Escherichia coli. Meanwhile, the N–Cl bond in the nanocomposite showed outstanding storage stability under UV light irradiation and good regeneration ability; the material can realize cyclic utilization and solve the problem of secondary pollution of the antibacterial material. It provides a broader application prospect for the recyclable N-halamine antibacterial material.
研究领域:
材料科学
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生物学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Feng Jiang,Bin Qiu,Dezhi Sun
Biological treatment is not completely effective for the removal of all refractory organics, including fulvic-like and humic-like substances, in fresh leachate from municipal solid waste (MSW) incineration. In this study, a UV/peroxymonosulfate (PMS) process was used to degrade the refractory pollutants that remained in the bio-treatment effluent. The reaction conditions were optimal when 10 g/L of PMS was used at a pH of 8.96. 70.6% of COD was degraded within 60 min with optimal reaction conditions. The refractory organics were degraded by the UV/PMS process, which generated intermediates with low molecular weight. The mechanisms involved in this advanced degradation process were uncovered by detecting the generation and conversion of radicals during the oxidation reaction.
研究领域:
环境科学
·
污水处理
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产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 48
·30102-30108
·
IF 3.361
Setareh Rostami-Javanroudi,Masoud Moradi,Kiomars Sharafi,Nazir Fattahi
In the present research, several novel and natural hydrophobic deep eutectic solvents (DESs) were prepared using methyltrioctylammonium chloride (MTOAC) as the hydrogen bond acceptor (HBA) and different types of straight chain alcohols as hydrogen bond donors (HBDs). One of the DESs composed of MTOAC and n-butanol was advantageously used to develop a vortex-assisted liquid phase microextraction (VALPME) method combined with high-performance liquid chromatography-ultraviolet detection (HPLC-UV) for the determination of common acaricides in fruit juice samples. Several important parameters influencing extraction efficiency were investigated and optimized, including the type and volume of DES, sample solution pH, effect of salt addition and, extraction and vortex time. Under optimal experimental conditions, the method showed good linearity with the correlation coefficients (R2) of 0.9986–0.9991 in the linear range of 2–300 μg L−1, low limits of detection of 0.5–1 μg L−1 and acceptable extraction recoveries in the range of 85–93%. The proposed method was successfully applied for the extraction and preconcentration of trace acaricides in real fruit juice samples, and the results demonstrated the potential of the synthesized DESs for the extraction and determination of contaminants in aqueous samples.
研究领域:
分析化学
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食品安全
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xiangzhuo Han,Yingchao Zhang,Jinkai Wang,Zhanchen Cui,Zuosen Shi
Sulfonate oxime ester photoinitiators (PIs) based on a thioether-substituted 1,8-naphthalenedicarboximide backbone exhibit good absorption at the emission wavelengths of commonly used LED lamps (385, 395, and 405 nm). The presence of weak C–S and N–O bonds in the molecular structure enables them to be cleaved under light, which leads to the generation of free radicals and cations with efficient initiation properties. Electron paramagnetic resonance spectroscopy supports the mechanism of C–S bond cleavage to produce free radicals, and UV–visible real-time spectroscopy in the presence of Rhodamine B base supports the mechanism of N–O bond cleavage to produce acids. These compounds are high-performance photoinitiators without any other additives for the polymerization of double-bonded compounds and epoxides. They can be initiated at low concentrations when exposed to UV-LEDs. These photoinitiators provide important ideas for the design and synthesis of photoinitiators, which have great potential for application in the field of photopolymerization, especially in hybrid light-curing systems.
研究领域:
材料科学
·
光化学
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聚合物科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2020
·
IF 3.465
Xiaodong Xin,Shaohua Sun,Anran Zhou,Mingquan Wang,Yan Song,Qinghua Zhao,Ruibao Jia
Sulfonamide antibiotics in water have raised public concern, owing to their stability and capacity to induce microbial resistance. We investigated the degradation efficiencies of photolysis by ultraviolet light and photolysis combined with hydrogen peroxide treatment. Combining ultraviolet light irradiation with hydrogen peroxide treatment was more effective at removing sulfadimethoxine than irradiation alone or UV/persulfate system. We also assessed the effects of hydrogen peroxide concentrations, reaction time, and the composition of the water matrix. The removing efficiency of sulfadimethoxine was negatively affected by high concentrations of hydrogen peroxide and with increasing alkalinity (pH 7.5–9.0). A tentative degradation pathway was proposed, involving the initial one-electron oxidation of sulfadimethoxine by ·OH and further reactions of the formed cation intermediate. We assessed the acute toxicity of the transformation products to Vibrio fischeri , and found that combining ultraviolet light irradiation with hydrogen peroxide treatment exerted lower toxicity to the bacterium than irradiation alone.
研究领域:
环境科学
·
水处理工程
·
毒理学
✓ 已验证
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Aygul Kadir,Tursun Abdiryim,Xiong Liu,Fangfei Liu,Ruxangul Jamal,Xinsheng Tang,Yaolong Zhang
In the present work, a novel self-powered hybrid ultraviolet (UV) photodetector (PD) based on ZnO @ZnSe nanoarrays/poly(3,4-ethylenedioxyselenophene) (PEDOS) was fabricated and systematically investigated. The designed PD is based on a sandwich configuration and with p-n junction, which is consisting of ZnO as the bottom n- layer, PEDOS as the top of p-layer, and ZnSe as the insertion layer. The results of the study on the performances of UV PD under different conditions optical power density shows that the ZnO@ZnSe/PEDOS exhibits excellent detection of UV light, the device achieves the excellent responsivity (R) 5.44 mA/W and high detectivity (D*) 1.42 × 10 11 Jones under the weaker optical power density (0.32 mW/cm 2 ). The study concludes with a suggestion that the ZnSe layer acts a key role in the superior property of the obtained device, which is introduction of ZnSe layer between the p-PEDOS and n-ZnO layers reduces band migration and thus effectively enhances carrier transport within them, and demonstrating that the responsivity (R) of ZnO@ZnSe/PEDOS is almost 18 times that of the device without the ZnSe layer (0.3 mA/W). On the other hand, as the p- types PEDOS, which enhances the junction quality by reducing the composite center of the carrier, expanding the depletion region and providing a step energy level between the band edges of ZnO and ZnSe, improving the overall collection of photogenerated carriers.
研究领域:
材料科学
·
光电子学
·
半导体器件
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2025
·
IF 2.8
Duan Yuan,Li Jing-Yi,Ding Yong-Bo,Qiao Yong-Luo,Shen Liang,Li Xin-Gui
In this paper, four kinds of bio-based alkyd polyols were prepared from bio-based oleic acid and coconut oleic acid as raw materials. Subsequently, UV-curable waterborne polyurethane acrylate dispersions (UV-WPUAs) were synthesized using the four bio-based alkyd polyols, respectively. Furthermore, these UV-WPUAs were employed to prepare UV-curable waterborne polyurethane acrylate coatings (UV-WPUA coatings). The study focused on comparing the effects of the four bio-based alkyd polyols on the performance of the UV-WPUAs and the resulting UV-WPUA coatings. The results showed that all the UV-WPUAs prepared from the above four bio-based alkyd polyols exhibited semitransparent, low viscosity, small particle size and high zeta potential. Additionally, the UV-WPUA-2 (alkyd polyol was prepared from oleic acid, hexahydrophthalic anhydride, neopentyl glycol and trimethylolpropane) coating exhibited excellent coating properties, such as excellent physical properties, chemical resistance and acceptable yellowing resistance. This phenomenon can be attributed to the higher crosslinking density of the UV-WPUA-2 coating, along with the lack of a benzene ring structure that is typically associated with yellowing. In conclusion, the result of this study confirms that bio-based alkyd polyols are suitable for preparing UV-curable waterborne polyurethane acrylate.
研究领域:
材料科学
·
高分子化学
·
表面工程
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产品关联
DOI
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 13
·5447-5453
·
IF 1.821
Haiqian Zhao,Jihui Gao,Wei Zhou,Zhonghua Wang,Shaohua Wu
The reason for the prominent error in the hydroxyl radical detection method by UV-vis spectrophotometry with fast blue BB salt (FBBs) as the chromogenic agent was detected, and a modified method was proposed. The simultaneous extraction of FBBs in the diazosulfone extraction process was proven to have a distinct influence on the test results. In the modified method, FeSO4 was adopted to limit the extraction of FBBs by a toluene/butanol extraction agent, which sharply decreased the influence of FBBs on diazosulfone detection. The FBBs amount and extraction time played an important role in its extraction. The appropriate FBBs/MSIA ratio was 50, and the reasonable extraction time was 300 s for the modified method. ˙OH concentration in the directional decomposition of the Fenton system was detected. The test error was about 7%. This method is quite significant to test ˙OH quantificationally to better understand Fenton reaction mechanisms and promote the generation of ˙OH.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 8
·3194-3205
·
IF 3.288
Jiabin Liu,Bowen Yang,Minghuan Gao,Lisha You,Yuansen Zhang,Zhiying Li,Linna Guo,Tiesheng Li,Penglei Chen,Minghua Liu
A series of novel efficient polyhedron-like WO3/butterfly-like Ag2MoO4 p–n junction photocatalysts (denoted as AMW-x) were designed and synthesized. The exact phase structure, microscopic morphology, electrochemical properties, physical properties and optical properties of the prepared samples were characterized by XRD, SEM, EDS, TEM, HRTEM, UV-DRS, PL, FL, XPS, UPS, BET, MS (Mott–Schottky test), EIS and photocurrent measurements. The photocatalyst could effectively degrade rhodamine B (RhB) under UV/Solar region light illumination. In this system, a p–n junction structure formed by the two different materials effectively enhanced the generation rate of photo-induced electrons and reduced the transfer resistance. These results exhibited that enhanced photocatalytic performance of materials were prepared. The activity of AMW-20 was 548.2/496.8, 57.9/146.1, and 3.7/17 times higher than polyhedron-like WO3, butterfly-like Ag2MoO4, and commercial powder (P25) under UV/Solar region light illumination. The photocatalytic mechanism mode for the improved photocatalytic performance was also proposed.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 9
·3369-3377
·
IF 2.2
Yao Jiale,Xu Jiang,Cui Ao,Wang Rui,Hao Longyun
In this study, the molecules in wool fabric were modified to convert their disulfide bonds into sulfhydryl groups (–SH) by using tris (2-carboxyethyl) phosphine hydrochloride (TCEP) as a reducing agent. The XPS, SEM, and UV–visible absorption spectrum were utilized to track the modification process. MXene and UV-curable PUA resin were blended and printed on the modified wool substrates by screen printing way, followed by a sustainable UV irradiation to effectively fix the printed coating on them. The effects of TCEP on the wettability, electrical resistance of conductive coatings were investigated. Especially, the durability of the conductive coatings to mechanical operations, wet and temperature treatment were systematically evaluated by measuring the resistance change rate on unmodified and TCEP modified wool fabrics, respectively. The results indicated that TCEP modification of wool fabrics could significantly improve the durability and stability of conductive coatings. This was because the active –SH groups in modified wool could participate in the polymerization of PUA molecules into a film under the excitation of UV photo-initiators, greatly improving the integrity and toughness of its structure and ultimately resulting in better adhesion between conductive coatings and wool fabrics.
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Bin Liang,Shaojie Kuang,Jiajian Huang,Limin Man,Zhuohong Yang,Teng Yuan
With the rapid development of industry and the growing shortage of fossil energy, tung oil has attracted much attention of researchers because of its environment-friendly and renewable advantages. In this work, we successfully synthesized two kinds of tung-oil-derived renewable UV-curable active monomers, tung-acid-maleic tri-acrylate (TOAH) and tung-maleic tetra-acrylate (TMPG). 1 H NMR and FT-IR results collectively revealed that the targeted active-monomers were successfully prepared. UV-curing kinetics of the films was studied by Photo-DSC, thermal properties of their cured films were investigated by dynamic mechanical analysis, thermogravimetric analysis and general performance of UV-curing films including acidic, alkaline resistance and boiling-water resistance were also investigated. Tensile properties of the cured films were also tested. Dynamic mechanical analysis demonstrated that the storage modulus and glass transition temperatures of the cured films increased while increasing the content of TMPG monomer. The crosslinking density of the cured copolymers also increased with the increasing content of TMPG monomer. TGA showed that the maximum thermal decomposition temperatures ( T max ) of the cured copolymers were all above 420 °C. Tensile tests indicated that the tensile properties were better in the cured systems when the mixed films consisted of 50TOAH/50TMPG and 30% HDDA reactive diluent. Finally, all the results demonstrated that comparable balanced properties could be obtained by mixing these two bio-based monomers together.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2022
·
IF 4.966
Fuping Bian,Xiaoquan Li,Jihe Zhao,Xuefeng Gui,Jiwen Hu,Shi Li,Shudong Lin
Ultraviolet (UV) photocuring technology has gained importance in crosslinking of polymers, as it allows fast curing rate, low energy consumption and no volatile organic compounds (VOCs). However, the photopolymerization of very thick films and in shadow areas where the light penetration is inhibited (e. g. in filled, pigmented, dispersed samples) remains a huge challenge. As reported herein, a simple hydrosilylation reaction was employed to synthesize epoxy-based silicone prepolymers . Firstly, the structures of the synthesized epoxy-based silicone prepolymers were characterized by Fourier-transform infrared (FT-IR) and proton nuclear magnetic resonance ( 1 H NMR) spectroscopy techniques, thus confirming the successful synthesis of these prepolymers. The epoxy group of prepolymers could be crosslinked under UV irradiation , and its silicone methoxy group (-SiOCH 3 ) was condensed under moisture ambient, so as to acquire both thick coatings and pigmented coatings due to the dual-curing approach. Moreover, water droplets exhibit water contact angles between 103° and 108° on these coatings, and surface energies of the these coatings are from 25.27 to 22.67 mN/m. The transparency of these coatings is over 90%. They remain stable at temperatures reaching up to 332.2 to 344.8 °C, thus demonstrating that they have excellent heat resistance. The coatings exhibited good mechanical properties with a tensile strength >4.57 MPa. Finally, the coatings have good anti-smudge and anti-fingerprint properties, and the overall results show that these films have potential applications as anti-smudge coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）