CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Junsheng Guo,Wenzong Xu,Tao Yan,Jiayan Zhang,Xiaoyu Guo,Lingfeng Wang,Julan Liu
Polyvinyl alcohol (PVA) is a promising biodegradable polymer, but its widespread application is critically constrained by inherent flammability, limited UV resistance, and the mechanical compromises often incurred by conventional flame-retardant modifications. To address these challenges, a novel bio-based phosphorus‑nitrogen synergistic flame retardant (DPP) was developed from pyridoxal phosphate via a facile Schiff base condensation and P H addition route. This well-designed DPP was efficiently incorporated into PVA via a green melt blending process, yielding composites that achieved a simultaneous enhancement of multiple properties. With a 10 wt% DPP loading, the composite exhibited exceptional flame retardancy, achieving a limiting oxygen index (LOI) of 30.5%, a UL-94 V-0 rating, along with a 63.2% reduction in its peak heat release rate (PHRR) and a 32.7% decrease in total heat release (THR). Additionally, it provided outstanding UV shielding performance, with an ultraviolet protection factor (UPF) of 362 and over 99.7% blocking of both UVA and UVB radiation. Impressively, its tensile strength was enhanced to 25.2 MPa, thus overcoming the common performance trade-off. This multifunctionality stems from DPP's well-orchestrated molecular design: it operates through a vapor- and condensed-phase synergistic flame-retardant mechanism and intrinsic UV absorption, while its strong interfacial hydrogen bonding with PVA constructs a physical crosslinking network, underpinning the concurrent mechanical enhancement. This work presents a strategy for fabricating sustainable, high-performance, multifunctional PVA materials. The PVA/DPP composites obtained via this strategy show promising potential for advanced applications such as outdoor protection and safe electronics packaging.
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Zhenyu Shi,Lei Rao,Peifang Wang,Lixin Zhang
In order to explore the influence of various carbon introduction on the morphology and photodegradation performance of C/g-C 3 N 4 composites, three kinds of different carbon materials: carbon nanotubes (CNT), graphene (GN) and carbon fibers (CF) were introduced to modify g-C 3 N 4 , and the morphologies, light absorption capacities and the underwater purifications of the composite photocatalysts were investigated. Results showed that the composites synthesized with different carbon substrates shows great differences in growth morphology. In addition, the introduction of various carbon sources also has a great impact on the physical and chemical properties of the composites. Compared with GN/g-C 3 N 4 and CF/g-C 3 N 4 , CNT/g-C 3 N 4 shows strong light absorption ability, especially in long-wavelength region (570–660 nm). To further study the difference of degradation ability of the composites in the underwater environment , the purification performance of modified g-C 3 N 4 at different water depths were carried out. The results show that under 40 cm of water, where the light intensity and ultra violet spectral are seriously attenuated, the purification efficiency of CNT/g-C 3 N 4 at 40 cm is 3.35 times than that of g-C 3 N 4 . This work provides insight in the design of highly efficient metal-free photocatalysts for the environmental remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Haoran Yin,Qizhan Zhang,Yi Su,Yunping Tang,Minghua Zhou
To promote the performance of traditional UV/chlorine and UV/H 2 O 2 processes, the novel UV based advanced oxidation process with electrochemical co-generation of chlorine and H 2 O 2 (UV/E-Cl&H 2 O 2 ) was for the first time used for degradation of carbamazepine (CBZ), a refractory antiepileptic drug with resistance to photodegradation and microbial degradation . Compared with UV/E-Cl and UV/E-H 2 O 2 processes, the apparent first-order rate constant of CBZ degradation by UV/E-Cl&H 2 O 2 process increased by 3.87 and 5.84 times respectively with a lower energy consumption (1.12 kWh/m 3 -log). Meanwhile, the disinfection by-products (DBPs) formation by the novel process was 21.4% less than that by UV/E-Cl process. Under the optimal condition of initial pH 7, applied current 600 mA and 15 mM NaCl, the UV/E-Cl&H 2 O 2 process could almost completely eliminate CBZ within 4 min and obtain 57.8% TOC removal in 1 h. The mechanism of UV/E-Cl&H 2 O 2 was investigated through processes comparison, quenching experiments, EPR analysis and determination of OH concentration. The generated radicals (i.e., OH and reactive chlorine species), especially OH, played a major role in CBZ removal. Besides, the possible degradation pathways of CBZ were proposed and the stability of UV/E-Cl&H 2 O 2 process for CBZ removal was certified based on ten consecutive runs. The degradation of typical pollutants (sulfamethazine, rhodamine B, methylene blue , atrazine and phenol) and treatments in three kinds of real wastewater confirmed the wide application feasibility of the novel process. In summary, this study provides a novel efficient and energy-saving process for removing organic pollutants with promising perspectives..
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Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Zhu Mengting,Tonni Agustiono Kurniawan,You Yanping,Ram Avtar,Mohd Hafiz Dzarfan Othman
Bisphenol A (BPA) is a refractory pollutant presents in water body that possesses serious threats to living organisms. To deal with it, we investigate and evaluate the effectiveness of GO@BiOI/Bi 2 WO 6 composite as a novel photocatalyst for BPA removal from aqueous solutions under UV–vis irradiation. To enhance its removal for BPA, the surface of BiOI/Bi 2 WO 6 is modified with graphene oxide (GO). This composite is named as ‘GO@BiOI/Bi 2 WO 6 ’. Changes in its physico-chemical properties after surface modification with GO are characterized by XRD, FTIR, FESEM-EDS, XPS, PL, and BET methods. Optimized conditions of BPA degradation by the composite are determined under identical conditions. Photodegradation pathways of BPA and its removal mechanisms by the same composite are presented. It is obvious that the GO@BiOI/Bi 2 WO 6 has demonstrated its potential as a promising photocatalyst for BPA removal under UV–vis irradiation. About 81% of BPA removal is attained by the GO@BiOI/Bi 2 WO 6 under optimized conditions (10 mg/L of BPA, 0.5 g/L of dose, pH 7 and 5 h of reaction time). The oxidation by-products of BPA degradation include p -hydroquinone or 4-(1-hydroxy-1-methyl-ethyl)-phenol. In spite of its performance, the treated effluents are still unable to meet the maximum discharge limit of <1 mg/L set by national legislation. Therefore, subsequent biological processes are essential to maximize its biodegradation in the wastewater samples before their discharge into waterbody.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Yachao Hao,Wei Zhou,Xin Wang,Youping Liu,Xin Di
In this study, a magnetic graphene oxide modified with green carboxyl-based deep eutectic solvent (MGO@DES) was synthesized for the first time and employed as a highly efficient adsorbent for the magnetic solid-phase extraction (MSPE) of three estrogens in milk samples. With large specific surface, good hydrophobicity and abundant adsorption sites, MGO@DES exhibited excellent extraction performance for estrogens. The adsorption kinetic experiment revealed that 5 mg of MGO@DES reached the equilibrium of estrogen adsorption within 3 min. MGO@DES based MSPE coupled with HPLC-UV method was developed and applied to the determination of three estrogens in milk samples. Good linearity (R 2 > 0.9953) was obtained in the range of 1–200 ng mL −1 and the low limits of detection were 0.20–0.28 ng mL −1 . The spiked recoveries were in the range of 90.3–105.7%, with RSDs less than 7.9%.
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ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Wen Qin,Jianshan Peng,Jingru Yang,Yang Song,Jun Ma
In this study, the relative residual UV absorbance (UV 254 ) and/or electron donating capacity (EDC) was investigated as a surrogate parameter to evaluate the abatement of micropollutants during the Fe(II)/PMS and Mn(II)/NTA/PMS processes. In the Fe(II)/PMS process, due to the generation of SO 4 •- and •OH at acidic pH, UV 254 and EDC abatement was greater at pH 5. In the Mn(II)/NTA/PMS process, UV 254 abatement was greater at pH 7 and 9, while EDC abatement was greater at pH 5 and 7. This was attributed to the fact that MnO 2 was formed at alkaline pH to remove UV 254 by coagulation, and manganese intermediates (Mn(V)) were formed at acidic pH to remove EDC via electron transfer . Due to the strong oxidation capacity of SO 4 •- , •OH and Mn(V), the abatement of micropollutants increased with increasing dosages of oxidant in different waters in both processes. In the Fe(II)/PMS and Mn(II)/NTA/PMS processes, except for nitrobenzene (∼23% and 40%, respectively), the removal of other micropollutants was greater than 70% when the oxidant dosages were greater in different waters. The linear relationship between the relative residual UV 254 , EDC and the removal of micropollutants was established in different waters, showing a one-phase or two-phase linear relationship. The differences of the slopes for one-phase linear correlation in the Fe(II)/PMS process (micropollutant-UV 254 : 0.36–2.89, micropollutant-EDC: 0.26–1.75) were less than that in the Mn(II)/NTA/PMS process (micropollutant-UV 254 : 0.40–13.16, micropollutant-EDC: 0.51–8.39). Overall, these results suggest that the relative residual UV 254 and EDC could truly reflect the removal of micropollutants during the Fe(II)/PMS and Mn(II)/NTA/PMS processes.
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xuelin Fan,Jia-Tao Miao,Li Yuan,Qingbao Guan,Aijuan Gu,Guozheng Liang
Big internal stress and poor UV resistance are two bottlenecks of epoxy resins for light emitting diode (LED) encapsulation, and how to solve them with a green method is still a great challenge. Herein, a unique hybrid was synthesized by forming SiO 2 particles on surface of cellulose, the hybridized cellulose (mCNC@SiO 2 ) was then used to develop new high performance epoxy resin (mCNC@SiO 2 /EP) for LED encapsulation. The effect of the content of mCNC@SiO 2 on the comprehensive performances of mCNC@SiO 2 /EP resins was studied. Results show that the presence of mCNC@SiO 2 not only greatly reduces the internal stress and improves UV resistance, but also increases moisture resistance while maintaining high heat resistance. When the content of mCNC@SiO 2 is only 2.0 wt%, the internal stress is reduced by 62%, thanking to the significant decrease in thermal expansion coefficient, and curing stress derived from the flexibility of Si-O-Si segment in mCNC@SiO 2 . In addition, mCNC@SiO 2 /EP resin has good transmittance, proving that the presence of mCNC@SiO 2 can effectively alleviate yellowing and improve UV resistance. These excellent comprehensive properties of mCNC@SiO 2 /EP resin demonstrate that mCNC@SiO 2 is a green and multifunctional modifier of epoxy resin for high performance LED encapsulation.
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高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Jin Liu,Boying Wang,Shuxin Li,Yao Wang,Jun Li,Yan Zhang,Christopher D. Snow,Matt J. Kipper,Soo Wohn Lee,Laurence A. Belfiore,Jianguo Tang
Advanced data storage and anti-counterfeiting technologies are critical in addressing modern information safety. In this work, novel nanocomposites of Eu3+, Tb3+, Zn2+ and -hyaluronan for down-conversion and NaGdF4:Yb,Er nanoparticles for up-conversion have been synthesized and applied for innovative anticounterfeiting luminescent inks. These inks exhibit excellent fluorescence under dual UV or NIR excitation, and sensitive quenching in response to some ions or compounds, enabling multi-level data encoding, reversible Cu2+ detection, and dynamic information concealment. Utilizing electrohydrodynamic (EHD) printing, we achieved precise patterns with line widths of approximately 20–50 μm, facilitating dynamic information concealment and secure data storage. The printed patterns, invisible under natural light, displayed distinct and bright fluorescence when stimulated by UV and NIR light, offering orthogonal readout capabilities for secure information retrieval. Additionally, the luminescent inks demonstrated remarkable sensitivity to Cu2+ ions, with fluorescence quenching efficiency reaching 85.3% at a Cu2+ concentration of 100 μg mL−1. The quenching process was reversible upon introducing ethylenediaminetetraacetic acid (EDTA), enabling up to three cycles of fluorescence recovery and suppression with minor degradation (<15%) in intensity after repeated use. The high-resolution EHD printing technology combined with excellent sensing performance, such as a detection limit of 1.2 μg mL−1 for Cu2+, enables a promising strategy for advancing intelligent information systems and hazardous ion detection. This work offers a versatile solution for secure information coding, anti-counterfeiting, and environmental sensing, providing a significant advancement in multifunctional luminescent materials, especially for smart quadruplicate information coding and hazard sensing, with dual UV/IR excitation.
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高影响因子
CHROMATOGRAPHIA
·
2013
·Vol. 76
·期 13
·735-745
·
IF 1.437
Peng Xi-Tian,Li Ze,Zhang Yi,Liu Tao,Yu Qiong-Wei,Feng Yu-Qi
A novel mixed-mode stationary phase (OAS) has been prepared by bonding n -octyl and aminopropyl groups with the surface of silica gel. The obtained OAS stationary phase was characterized by Fourier transform infrared spectroscopy, elemental analysis, zeta potential and ion-exchange capacity. The mixed-mode one-site and two-site retention models were used to quantitatively describe the retention mechanism of the OAS stationary phase using three strong acidic analytes. The results indicated that the two-site model is more suitable for the description of mechanism of OAS phase. Then the OAS stationary phase was applied to separate ten water- and fat-soluble vitamins in a single run; the separation is based on the hydrophobic and ionic interaction mechanisms. A method for the simultaneous determination of ten water- and fat-soluble vitamins in commercial multivitamin tablets by high performance liquid chromatography with ultraviolet detection was established and validated according to the stability, linearity, accuracy and precision. Finally, the validated method was used to analyze the content of ten vitamins in two commercial multivitamin tablets and the recoveries were in the range of 89.2–111.0 %, with RSDs <6.1 %, indicating the good reliability of the proposed method.
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COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Qian Su,Kangli Yang,Zhiqing Yuan,Cancheng Li,Shoutong Meng,Xuyu Long,Rui He
Aiming at the problems of carbon fiber board (CFB), which is not waterproof and has poor UV resistance, a superhydrophobic coating with UV resistance and high-temperature resistance was innovatively prepared on CFB using an aqueous-phase polymer dispersion system by a highly efficient spraying method. The whole preparation system is highly environmentally friendly and safe. The results showed that the superhydrophobic carbon fiber board (SKCFB) could resist UV up to 85 h, could withstand high temperatures up to 300 °C, and had a water contact angle (WCA) of 159°. In addition, the abrasion resistance of SKCFB is 140 and 180 cycles under the action of 800 grit and 1200 grit sandpaper, respectively, for a load of 100 g, and 110 cycles under the action of 600 grit sandpaper. When carrying a load of 500 g, the 600 mesh, 800 mesh, and 1200 mesh sandpaper can be used for 40, 60, and 80 cycles of abrasion resistance, respectively. Compared with other samples of the same type, this SKCFB is simpler to prepare, has a greener and safer preparation route, and has better performance, plus the ability to control the appearance color as desired. This study provides a novel green, simple, and fast strategy for preparing superhydrophobic coatings on CFBs. At the same time, it opens a new path for preparing superhydrophobic coatings and enhances their application in industry.
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高影响因子
LANGMUIR
·
2021
·
IF 3.882
Qingyu Liao,Dong Chen,Xianhong Zhang,Yuhong Ma,Changwen Zhao,Wantai Yang
A facile synthetic route was developed to prepare a surface-grafted brush layer of poly(vinyl ethers) (PVEs) directly by a radical mechanism, with the “naked” Li+ acting as a catalyst. Density functional theory calculations suggested that complexation of naked Li+ to VEs significantly reduced the highest unoccupied molecular orbital–lowest unoccupied molecular orbital (HOMO–LUMO) energy gap from 5.08 to 0.68 eV, providing a better prospect for electron transfer. The structure, morphology, and surface properties of grafted polymer layers were characterized using attenuated total reflection Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, and dynamic water contact angle (DCA). Moreover, ellipsometry data indicated that the thickness of the polymer brushes was in the range of 20–60 nm, which corresponds to the grafting densities of 0.65–1.15 chain/nm2, and DCA decreased from 84.4 to 45.3°. Most importantly, no hydrolysis was observed for the modified surface after 30 days of exposure to phosphate-buffered saline solution, 0.1 mol/L NaOH(eq) and 0.1 mol/L HCl(eq), demonstrating excellent hydrolysis resistance with long service life. In addition, as a proof of concept, the side hydroxyl groups of grafted PVEs provide active sites for efficient fixation of bioactive molecules, e.g., glycosaminoglycan and serum protein.
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高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Fang Jiang,Mengsi Wu,Ziyao Zhu,Chenkai Jiang,Zhihui Ai,Jingming Gong
The persistent nature of per- and polyfluoroalkyl substances (PFAS) poses critical challenges for conventional water treatment technologies, particularly in bromide-rich matrices where coexisting bromates (e.g., coastal industrial wastewater or landfill leachate), a carcinogenic and mutagenic disinfection by-product amplifies remediation complexity. This study unveils a self-sustaining reduction-oxidation coupling (ROC) mechanism that synergistically harness hydrated electron (e aq − ) and reactive bromine species (RBS) to achieve simultaneous PFAS defluorination and bromate detoxification under UV/sulfite treatment. Through systematic experimentation and density functional theory (DFT) calculations, we demonstrate that bromate undergoes stepwise reduction to benign bromide ions while generating radical RBS (e.g., Br • and Br 2 •− ), which electrophilically attack intermediates of hydrogen-enriched fluorotelomer carboxylates (FTCAs) through hydrogen abstraction rather than directly targeting parent perfluorooctanoic acid (PFOA). This endogenous ROC process achieved 96 % defluorination of PFOA within 240 min at pH 10, outperforming conventional UV/sulfite treatment by 36.5 %. Notably, hydrogen-fluorine exchange strengthens adjacent C − F bonds with bond dissociation energy (BDE) up to 125 kcal mol −1 , rendering FTCAs resistant to e aq − but susceptible to bromine radicals, confirmed by Fukui function analysis. Meanwhile, this ROC process also works effectively in bromine-containing waters treated with UV/sulfite, highlighting its universal applicability in real-world water matrices. Across diverse water matrices (e.g., tap water or lake water), the system maintained >70 % defluorination efficiency. Additionally, this eₐ q ⁻/RBS-mediated ROC process demonstrated chain-length universality for C4-C8 perfluorocarboxylic acids and perfluorooctanesulfonic acid, while also detoxifying bromate to benign Br − , exemplifying its effectiveness in treating PFAS-contaminated waters with elevated bromide concentrations (e.g., seawater and brine), especially regions burdened with both PFASs and bromate contamination. By exploiting inherent water components as process catalysts, this work establishes a paradigm-shifting strategy for complex PFAS remediation without exogenous oxidant addition, offering dual environmental benefits through concurrent contaminant degradation and disinfection byproduct control.
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