Journal of Water Process Engineering
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2024
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IF 6.3
Yanan Liu,Guangyan Wang,Shuaishuai Lu,Siqi Wang,Peijuan Jiang,Huan Chen,Fang Jiang
Pollution caused by per - and polyfluoroalkyl substances (PFASs) has raised global health concerns and there is an urgent need for researchers to find effective treatment methods. The covalent triazine framework (CTF) adsorbent materials with different structures based on various precursors using the ionothermal method were prepared and characterized in this study. Among them, F-doped CTF (F-CTF) is favorable for effective mass transfer in the adsorption process due to its rich microporous structure and large specific surface area. The maximum adsorption capacity (q max ) for PFOA reached 769.2 mg/g under the synergistic effect of electrostatic force and the interaction of F F. After six cycles of adsorption-desorption experiments, the adsorption and desorption rates of the F-CTF 400°C were stable at >90 %. This result indicates that F-CTF 400°C possesses high stability and recyclability. Furthermore, the desorption solution containing a high concentration of PFOA was treated directly by a UV/Na 2 SO 3 system, utilizing the e aq − within the system to decompose PFOA. The reduction and defluorination efficiencies for the desorption solution with high concentrations of PFOA reached 90 % and 40 %, respectively. The study results indicate that by leveraging the high adsorption selectivity and stable recoverability of F-CTF 400°C , the UV/Na 2 SO 3 system can completely remove PFOA. This approach offers a novel solution for the elimination of PFOA pollution in the environment.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Ruoteng Ma,Chao Duan,Chenyue Yan,Kang Yang,Qi Fan,Xiaorang Nie,Lei Dai,Yonghao Ni
Most of the bio-based hydrogels tend to malfunction under a high-temperature condition, as the crosslinked network structure readily disintegrates, failing to meet the demands of hot environment. Herein, we exploit a thermostable composite hydrogel (CH) mainly using bio-based hyperbranched lignin nanoparticles (H-LNPs), TEMPO-oxidized cellulose nanofibers (TOCN), and scleroglucan (Slg), followed by a slow evaporation to form a multifunctional CH film. Thanks to the uniform distribution of H-LNPs and TOCN, which are rich in hydroxyl groups, within the hydrogel matrix, the crosslinking density, storage modulus, loss modulus, and thermal stability of the CHs are remarkably enhanced. As a result, the optimum CH demonstrates excellent thermal resistance and structural stability even after 196 h at 140 °C. Moreover, the resultant CH film exhibits outstanding UV shielding (>99.8 %) and solar radiation shielding (cooling 6.6 °C), endowing it as an ideal candidate for thermal insulation. These findings underscore the potential of H-LNPs in the development of robust, thermostable, and thermally insulating hydrogels for industrial applications in extreme environments.
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PubMed
高影响因子
ACS Applied Energy Materials
·
2024
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IF 5.4
Mingming Cui,Hong Sun,Zhichao Xue,Qiang Li,Tianyu Zhang,Qunying Kang
Using gel polymer electrolytes (GPEs) instead of liquid electrolytes is a sensible and effective strategy for safety reasons. A GPE membrane was prepared by UV-curing using poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) as the polymer substrate material and an optimized ratio. The GPE membrane exhibited good flexibility and a higher ionic conductivity (σ = 0.63 mS cm–1). The RuO2@C/GPE/Li (abbreviated as S-GPE) battery is employed to demonstrate the electrochemical performance of GPE. The battery exhibits an Rct of 255.9 Ω, accompanied by a lack of cycle stability, with a cycle life of only 110 h. The results indicate that it is challenging to enhance the battery’s overall performance by solely improving the internal transfer performance of the electrolyte and ignoring the high interface impedance caused by the “solid–solid” contact at the electrolyte–electrode interface. Based on these findings, a straightforward one-step method is adopted to combine GPE with the air cathode by in situ photopolymerization and assemble it into RuO2@C-GPE/Li (abbreviated as I-GPE) battery used to demonstrate the electrochemical performance of the integrated GPE. The Rct value of the battery is 89.66 Ω, with a notable improvement in cycle stability. The battery’s cycle life is 940 h, which is 8.5 times that of the sandwich structure lithium–oxygen battery. The results indicate that preparing an integrated GPE by in situ photopolymerization of the electrolyte electrode is a straightforward and effective method to improve poor interfacial compatibility and can provide a theoretical basis for subsequent in-depth research.
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高影响因子
Water
·
2024
·Vol. 16
·期 9
·1302
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IF 3
Jinfeng Zhao,Huichao Zhu,Chen Tao,Zhiquan Wang,Ning Deng,Xin Huang
Conventional disinfection techniques, relying on a single disinfection step, often fail to directly eliminate microorganisms, instead causing them to enter a viable but nonculturable (VBNC) state. However, microorganisms in the VBNC state retain metabolic activity and can reactivate under suitable conditions, representing a “hidden source of contamination” that threatens drinking water safety. This study fundamentally assessed the feasibility of combined disinfection methods by integrating UV254with disinfectant (NaClO, PAA, and PDS) for inactivatingPseudomonas aeruginosa(P. aeruginosa), an opportunistic pathogen that has been widely detected in water supply systems. The number of culturable cells was determined using the heterotrophic plate counting (HPC) method, and the number of VBNC cells was quantified using our recently developed qPCR approach. Quantitative analyses showed that combined disinfection methods can effectively reduce both culturable and VBNC cells by several orders of magnitude compared to a single disinfection step. Notably, VBNCP. aeruginosa,after 30 min of UV/NaCIO treatment, was below the detection limit (3.191 log CFU/mL) of PMA-qPCR. The reactivation experiment also confirmed that VBNCP. aeruginosadid not reactivate for 16 h after 30 min of UV/NaClO treatment under controlled laboratory conditions. The higher disinfection capacity of combined methods can be attributed to the generation of reactive radicals. This study highlighted combined disinfection as a promising approach for the inactivation of bacteria in the VBNC state, yet further studies are needed before an application can be considered for minimizing VBNC reactivation in city utility water processing or high-risk building water distribution systems.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Lijian Sun,Jingyuan Zhang,Ying Qin,Weimin Guo,Kuo Zhang,Jiang Chang,Tianyuan Xiao,Wei Wang,Qiu Fu
Color conversion, long-wavelength light emission by absorbing short wavelength light using color conversion materials, is not only the basis for successful operation of many contemporary display and lighting technologies, but also the most effective strategy for shielding harmful UV and blue light. However, high cost and complicated processing inevitably hinder the development of color conversion materials. Inspired by FeCl 3 solution, color-conversion cellulose films with low haze and high transparency were successfully prepared by the coordination and stacking of Fe 3+ . For the first time, it was found that when the coordinated Fe 3+ forms a stacked layer, the film blocks the entire UV and high-energy blue light (HEBL) region (400–450 nm), and the absorbed UV and HEBL is converted into low energy (long wavelength) light in the yellow and green regions. The films also demonstrate efficient blue light conversion and allows other light in the visible region to enter smoothly. The light conversion performance of the films is substantiated through their application on blue-, green-, and red-LEDs. By means of light absorption and conversion, the films are capable of efficiently screening blue light emitted by WLEDs in lighting systems, video game console screen, computer screen, and mobile phone screen, as well as UV radiation from the sun. Encouragingly, the incorporation of Fe 3+ enables films to achieve an exceptional flame-retardant feature. These films as color conversion materials will have wide applicability in eye protection and flexible photoelectric devices due to their exceptional combination performance and are highly suitable for large-scale continuous production.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
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IF 5.8
Xiaoquan Li,Fuping Bian,Rui Huang,Jiyan Wei,Xuefeng Gui,Jiwen Hu,Shudong Lin
UV-curing technology is a new, green technology with the advantages of being efficient, energy-saving, and environmentally friendly; however, there is a general oxygen-inhibition problem during the UV-curing process, especially when silicone acrylates are applied to the UV-curing treatment. Herein, epoxy-based silicone prepolymers (ESP) containing Si-H bonds were prepared through the hydrosilylation reaction of poly(dimethylsiloxane-co-methylhydrosiloxane) (PDMS-PHMS) and allyl glycidyl ether (AGE) to graft epoxy groups onto silicone segments while retaining part of the Si-H bond. The epoxy groups in the prepolymers are capable of cationic photopolymerization, and the retained Si-H bonds in the prepolymers can generate highly reactive silyl radicals for initiating free-radical photopolymerization. The anti-oxygen inhibition ability of silicone acrylates was enhanced with the addition of ESPs. Through experimental investigation, it was found that ESP-3 grafted with 0.30% epoxy groups had the best effect on reducing oxygen inhibition, and the silicone acrylates were able to undergo UV curing in air without sticky surfaces when the added amounts of ESP-3 were at 20 wt%. The addition of ESP-3 has no major impact on the transparency and thermal performance of the UV-cured coatings and further enhances their hydrophobic properties. The free radical/cationic hybrid UV-cured silicone materials reduce the problem of oxygen inhibition, and the UV-cured silicone materials have great potential as hydrophobic and self-cleaning materials.
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高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Tongyi Wu,Xiangqin Ding,Kaifeng Yuan,Tianhua Liu,Guoqiao Lai,Qiu Chen
Single UV-curing silicone-modified polyurethane acrylate materials have limitations, such as low molecular polymerization and weak mechanical properties compared to thermal-curing materials. This experiment synthesized a polyurethane prepolymer coated with isocyanate groups using hydroxyl polyether silicone oil (PDMS) and diisocyanate. tert-Butylaminoethyl methacrylate (t-BAEMA) was then utilized to create a silicon-modified polyurethane acrylate (SiBPUA) prepolymer with heat-unstable urea and photosensitive groups. This prepolymer was incorporated into photosensitive resin materials and processed through 3D DLP 3D printing. Upon heating, the −NCO group regenerated, and the chain extender underwent a secondary curing reaction, increasing molecular weight and improving performance. The study investigated the impact of different reactants on SiBPUA properties, deblocking temperature, optimal curing temperature, and enhancement of UV-curing materials through thermal curing. The results revealed that the use of isophorone diisocyanate (IPDI), 4,4′-diaminodicyclohexylmethane (PACM), and methyl methacrylate (MMA) resulted in the best mechanical properties. Furthermore, UV-thermal dual curing significantly enhanced tensile strength (12.5 MPa) and elongation at break (219.5%), broadening the application potential of UV-curing 3D printing materials.
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高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2024
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IF 4.5
Jiongfeng Sun,Yi Hong,Guofu Qiao
The synthesis and processing of most polymer adhesives rely on energy-inefficient and environmentally burdensome manufacturing approaches. In this paper, a novel synthesis strategy, UV-initiated frontal polymerization (FP) for the fast synthesis of high-strength, self-propagating epoxy adhesives at room temperature, was presented, in which the self-propagating rate reached 71.4 mm min −1 . CuCl 2 was used as a catalyst to decrease the onset temperature of polymerization and ensure sufficient polymerization on the surface of the material to be bonded. Mild steel, glass, ceramic, wood, PMAA, and concrete were successfully bonded within several minutes at room temperature. In the same material system, the adhesive strength with the FP curing approach was greater than that of thermal curing, and the former had a better pore structure , as determined by MIP analysis. This paper provides a promising idea for the in-situ fast synthesis of high-strength epoxy adhesives at room temperature.
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高影响因子
POLYMER
·
2024
·
IF 4.1
Sitong Liu,Jie Yi,Rui Dai,Meng Wai Woo,Zhulian He,Hui Chen
In this work, the migration of urea and/or formamide plasticizers in crosslinked starch/polyvinyl alcohol (PVA) films under UV irradiation has been accurately quantified by using a combination of GC-MS/MS and UV–Vis analysis. The crosslinked starch/PVA films, prepared with different amide plasticizers (urea, formamide, urea-formamide), were characterized via scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and X-ray photoelectron spectroscopy (XPS). After 7 days of UV irradiation, the starch/PVA film plasticized with urea-formamide (A 7 -SPF-UF) exhibited a flat surface morphology, high crystal stability, and highest thermal stability. The migration ratio of urea and formamide for A 7 -SPF-UF was also quantified to be 3.2 % and 4.5 %, respectively, using GC-MS/MS and UV–Vis analysis, indicating optimal migration resistance. The synergistic effect of urea and formamide as plasticizers built the dense network structure of A n -SPF-UF and improved the UV aging resistance, toughness and durability of the film. On one hand, this enhances the market competitiveness of the products; on the other hand, it promotes the development of environmentally friendly materials, aligning with sustainability requirements.
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高影响因子
ACS Applied Nano Materials
·
2024
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IF 5.3
Ning Ding,Neng Hu,Junfeng Zhang,Huawei Xu,Liubang Meng,Xin Cai,Peter Müller-Buschbaum,Dongming Qi,Qi Zhong
Because of the detrimental effects of excessive exposure to solar ultraviolet radiation (UVR) on human skin health, wearable UVR detectors have attracted more and more attention. Inspired by the artwork “Tian-tsui hair pin with flora decoration” from the Palace Museum, a reversible and photochromic peony-shaped hairpin is designed to realize the visualized detection of solar UV radiation. It is prepared via electrospinning a mixed solution containing thermoplastic polyurethanes (TPUs) and Zn-MOF@WO3 onto microfiber nonwoven fabrics (MFNFs). Because of the enhanced UV responsive and photochromic capability from Zn-MOF@WO3 as well the excellent flexibility from TPUs and MFNFs, the obtained hairpin presents an excellent photoresponsive and wearable performance. When exposed to UV radiation from sunshine, the hairpin switches from white to light blue and finally to blue with radiation time. The colors light blue and blue can be used to indicate the UV radiation doses for the synthesis of vitamin D and the induction of erythema, respectively. With the assistance of oxygen in air, the hairpin recovers to its original state after being maintained in a dark atmosphere for 12 h. Even after six cycles of exposure to UV radiation and recovery in the dark, the photochromic performance almost remains unchanged. Only a minor reduction of 5% is observed. As a traditional wearable headdress in China, the peony-shaped hairpin prepared from the hybrid nanofibers not only presents oriental elegance but also is suitable for cyclical use in the daytime to monitor UV radiation for skin health management.
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2024
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IF 4
Caiyun Liu,Siye Gao,Jialin Ma,Yongliang Lu,Mario Prejanò,Yunkui Li
Increasing consumer demand for high-quality wines required the introduction of more comprehensive monitoring indicators for quality management, necessitating winemakers to strive for rapid, real-time, and affordable monitoring tools during winemaking. This study investigated the feasibility of cost-efficient and easy-to-implement ultraviolet-visible (UV-Vis) spectroscopy combined with chemometric methods to predictively monitor the evolution of wine color and phenolics throughout commercial fermentation. Fermentations on a winery scale were carried out with a daily analysis of the UV-Vis spectra, color, and phenolics. Furthermore, characteristic wavelengths were established by a self-compiled Python program to reduce redundancy in spectra. The optimized partial least squares (PLS) model predicted well with a residual prediction deviation (RPD) greater than 2.54, and the robustness was further verified by a robust external Bland-Altman method. UV-Vis spectroscopy can achieve objective monitoring of the practical fermentation profile, which can better help winemakers make decisions to improve wine quality and consistency.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Kun Xu,Zhijia Zhu,Chunyan Hu,Jian Zheng,Huitao Peng,Baojiang Liu
There is currently plenty of emphasis on measures to handle the water pollution spurred on by the misuse of antibiotics. Given its exceptional degradation accomplishment, periodate (PI), a steady solid oxidant, has promising future applications in the breakdown of antibiotics. In this research, PI was activated with UV/CoFe 2 O 4 (CFO) for the first time in an attempt to eliminate oxytetracycline (OTC). The UV/CFO/PI system eliminated 30 mg∙L -1 OTC with a removal effectiveness of almost 100 % in 12 min (OTC 30 mg∙L -1 , CFO 0.2 g∙L -1 , PI 2 mM, pH 5.5). In addition, the ferromagnetism of the CFO assisted to the system's remarkable cycling achievement, with 85.9 % of the OTC still removed after ten cycles. Various organic contaminants, which include reactive blue KN-R (KN-R), ciprofloxacin (CIP), chlortetracycline (CTC), and levofloxacin (LVX), further demonstrated the UV/CFO/PI system to be useful for degrading. The primary active substances for OTC elimination were revealed and recognized through scavenging experiments and EPR analysis as h + , •IO 4 , •IO 3 , 1 O 2 , •OH, and •O 2 – . Simultaneously, redox cycles of Fe(III)/Fe(II) and Co(III)/Co(II) were also observed by XPS test to hasten OTC deterioration. It appeared that this system may be a green approach for antibiotic elimination by investigating the degradation route of OTC and the influence it has on the surroundings employing FuKui functions, LC-MS, and toxicological analysis software (T.E.S.T.), respectively. Additionally, we observed that the CFO (2 2 2) crystal surface has the best adsorption impact on PI by computing Eads from DFT.
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高影响因子
危险品化学品经营许可证（带存储）