CHEMOSPHERE
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2020
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IF 5.778
Min Liu,Xinyu Gao,Fei Pan,Yuwei Deng,Dongsheng Xia,Zhang Li,Jie Fu
This work reported the role of pyrene in formation of naturally occurring silver nanoparticles (AgNPs) via the reduction of silver ions by humic acid under the UV irradiation in the aquatic environment. An increase in temperature (25–90 °C), pH (5–9) or concentration of humic acid (2.5–15 mg/L) led to an enhanced formation of AgNPs. The TEM images indicated the formed AgNPs were spherical with an average particle size of ∼20 nm. Pyrene showed a limited capacity for the photoreduction of silver ions, and when both pyrene and humic acid were present, pyrene would compete with humic acid for the reduction of silver ions. However, the presence of pyrene would enhance the stability and suppress the antibacterial activity of natural AgNPs. The UV–vis spectra of AgNPs suspensions generated with pyrene did not change within 45 days. The inhibition rates against Escherichia coli of AgNPs generated with pyrene were 8–32% lower than those of AgNPs generated without pyrene. This study provides environmental implications on the fate and ecotoxicity of natural AgNPs with interaction of polycyclic aromatic hydrocarbons .
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高影响因子
JOURNAL OF CHROMATOGRAPHIC SCIENCE
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2017
·Vol. 55
·期 6
·662-668
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IF 0.984
Ma Xiaowei,Feng Fan,Yang Yang,Dang Xueping,Huang Jianlin,Chen Huaixia
Fe3O4@MIL-100 (MIL, Material Institut Lavoisier) core–shell magnetic microspheres were prepared and applied as the sorbent for the magnetic solid phase extraction (MSPE) of N,N-diethyl-m-toluamide (DEET) in baby toilet water for the first time. The synthesized magnetic metal–organic frameworks were characterized by transmission electron microscope, infrared spectroscopy and thermogravimetric analysis. The functionalized magnetic microparticles showed excellent dispersibility in aqueous solution. The MSPE conditions were investigated in detail. Under the optimized conditions, an MSPE–high performance liquid chromatography method for the determination of DEET was developed. The method was linear in the concentration range from 5 to 500 μg L−1 for DEET in baby toilet water and good linearity (r2 > 0.9998) was obtained for the calibration curve. The limit of detection was 1.5 μg L−1. Both the intra-day and inter-day precisions (relative standard deviations) were <3%.
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PubMed
高影响因子
Journal of Ocean University of China
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2015
·Vol. 14
·期 6
·989-993
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IF 0.558
Xue Yuejun,Ge Tiantian,Wang Xuchen
Radiocarbon ( 14 C) measurement of dissolved organic carbon (DOC) is a very powerful tool to study the sources, transformation and cycling of carbon in the ocean. The technique, however, remains great challenges for complete and successful oxidation of sufficient DOC with low blanks for high precision carbon isotopic ratio analysis, largely due to the overwhelming proportion of salts and low DOC concentrations in the ocean. In this paper, we report an effective UV-Oxidation method for oxidizing DOC in natural waters for radiocarbon analysis by accelerator mass spectrometry (AMS). The UV-oxidation system and method show 95%±4% oxidation efficiency and high reproducibility for DOC in both river and seawater samples. The blanks associated with the method was also low (about 3 µg C) that is critical for 14 C analysis. As a great advantage of the method, multiple water samples can be oxidized at the same time so it reduces the sample processing time substantially compared with other UV-oxidation method currently being used in other laboratories. We have used the system and method for 14 C studies of DOC in rivers, estuaries, and oceanic environments and have received promise results.
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JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
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2016
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IF 0.669
Yu Wang,Jing Yang,Yanfang Guo,Haipeng Wang,Yalan Liu,Huiming Huang,Baogang Xie
The determination of alendronate (ALE) in biofluids using a low-cost instrument is potentially useful in preclinical pharmacokinetic studies. This study developed and validated a high-performance liquid chromatography with ultraviolet method for ALE determination in rat plasma using precolumn derivatization with phenyl isothiocyanate (PITC). Inhibiting compounds in the samples were first eliminated using solid-phase extraction. ALE in the sample was subsequently allowed to react with PITC to form a phenylthiocarbamoyl derivative for further analysis. The assay was linear within the concentration range of 0.29–25.0 µg/mL. The precision and accuracy were less than 3.9% and 98.0 ± 3.9%, respectively. The limits of detection and quantification were 0.08 and 0.20 µg/mL, respectively. The method was successfully used to evaluate the pharmacokinetic parameters of ALE in rats following a single oral administration (30.0 mg/kg). The results show that the peak plasma ALE concentration is 0.69 ± 0.18 µg/mL. The area under the plasma concentration–time curve value of ALE was 2.14 ± 0.68 µg/mL hr. This method can suitably evaluate the bioavailabilities of different ALE dosage forms in preclinical pharmacokinetic studies.
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高影响因子
MATERIALS TECHNOLOGY
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2016
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IF 1.442
G. X. Chen,Y. Y. Chen,Y. Y. Cui,Q. F. Chen,T. Chen,Y. Yang
To meet an increasing market demand of conductive ink which is applicable to wide range of substrates, ultraviolet (UV) curing technique combined with nano-silver materials was used to fabricate UV electric conductive ink. Firstly, both silver nano-particles (AgNPs) and silver nano-wires (AgNWs)/poly (vinyl pyrrolidone) (PVP) composites were synthesized. An ethanol solution-phase approach using hydrazine hydrate as a reducing agent was presented for an easy synthesis of large-scale AgNPs with an average diameter of 35 nm. AgNWs with diameter of 40 nm and length up to over 10 μm were synthesized by polyol method. In AgNWs synthesis process, the main influencing factors such as the molar ratio of PVP to silver nitrate, the reaction time and PVP of different degree of polymerization were investigated. Finally, nano Ag/PVP composites, polyurethane acrylate, photoinitiator 1173 and solvents were used to fabricate UV electric conductive ink, which had an electrical conductivity on paper as high as 2.1 × 105 S/m.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Yuanyuan Lu,Guangli Chen,Yuxuan Zhang,Wenjun Lv,Kangwei Zhang,Zaosheng Lv,Yanfen Huang
Superhydrophobic surfaces are important in research and technology because of their extraordinary qualities, such as water repellency, self-cleaning ability, and anti-biofouling performance. However, their production frequently relies on complicated and dangerous chemicals, which are incompatible with sustainable development objectives. We expected that integrating bio-derived chitosan (CS) with Zinc Oxide (ZnO) and altering it with low-surface-energy polymers-ODA/PDMS-OH (Octadecylamine/Hydroxy-Terminated Polydimethylsiloxane) would result in an environmentally friendly, resilient, and multifunctional superhydrophobic coating. This technique attempted to integrate micro/nano-structuring with chemical alteration of cotton fabric. The results show that the modified fabric has exceptional superhydrophobicity, with a water contact angle (WCA) of 159.8° and a sliding angle (SA) of 6.9°. The superhydrophobic surface has exceptional mechanical resilience, retaining hydrophobicity after tape peeling, sandpaper abrasion, and washing cycles. Furthermore, the coating exhibits considerable rebound recovery following plasma etching. Although air permeability was slightly reduced, the treated fabric met the comfort requirements for wearable applications while demonstrating superior ultraviolet (UV) resistance, antibacterial activity, self-cleaning performance, and oil-water separation capability, indicating promising practical utility. As a result, this study presents a long-lasting, fluorine-free, and scalable technique for producing multifunctional fabrics that bridges the gap between high performance and environmental sustainability.
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高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Tianshuang Song,Huilin Huang,Aiping Zhang
While copper-based Fenton-like systems can effectively degrade organic matter in the effluent from membrane bioreactor (MBR), the performance is hindered by sluggish Cu 2+ /Cu + cycling and oxidant inefficiency. In this study, a UV-synergized CuS-activated H 2 O 2 system was constructed, and the removal efficiency and synergistic mechanism for organic matter in MBR effluent were investigated. Under optimized conditions (UV=14 W, CuS=0.06 g/L, [H 2 O 2 ]=50 mM, pH=3.0, t=60 min), the UV/CuS/H 2 O 2 system achieved removal efficiencies of 62.49%, 89.81%, and 38.48% for UV 254 , color number (CN), and total organic carbon (TOC) respectively. This performance is attributed to the disruption of aromatic structures and a reduction in molecular weight, condensation degree, and humification degree. Reactive oxygen species characterization confirmed the presence of hydroxyl radicals ( • OH), singlet oxygen ( 1 O 2 ) and superoxide radical anions (O 2 •− ) in the system, with O 2 •− identified as the dominant reactive species driving the process. Through analysis of the material morphology, distribution of copper compounds, and changes in oxidation states, the reaction mechanism of the UV/CuS/H 2 O 2 system can be summarized as homogeneous and heterogeneous Fenton-like reactions coupled with CuS adsorption, all of which are jointly promoted by the photochemical effects of ultraviolet radiation. Additionally, benzoic acid removal remained above 96% over six cycles with minimal Cu 2+ leaching, confirming the reusability and environmental compatibility of CuS. This study provides a theoretical basis for using the UV/CuS/H 2 O 2 system to remove organic matter from landfill leachate.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Eslam Ibrahim El-Aswar,Yu Lei,Zhimin Qiang,Yanyan Huang,Gholamreza Moussavi,Mengkai Li
The vacuum-ultraviolet/ultraviolet/air micro-nano bubble (i.e., VUV/UV/MNB) process is a promising solution for wastewater treatment with high-efficiency and chemical-free advantages. However, the influence of surfactants, a common component wide-spread in wastewater on VUV/UV/MNB efficiency remains unknown. This study investigated the overlooked role of surfactants in enhancing the degradation of emerging contaminants in the VUV/UV/MNB process, using carbamazepine (CBZ) as a model contaminant. The addition of surfactants increased the CBZ degradation rate by at least 62 %, compared to 50 % without them. The anionic surfactant, sodium dodecylbenzene sulfate (SDBS), exhibited the highest promoting effect, while the cationic surfactant, dodecyl trimethyl ammonium bromide, exhibited the least. Notably, the enhancement plateaued at an optimal [SDBS] 0 , beyond which competition between HO • and SDBS hindered further degradation. The 75.8 % degradation enhancement with SDBS, compared to 50.8 % for a non-surfactant, was attributed to its amphiphilicity and adsorption capability, which increased CBZ interfacial concentration. Furthermore, SDBS showed enhanced MNBs stabilization, evidenced by a smaller reduction in CBZ degradation (8.6 %) compared to non-surfactant (23.9 %) in the intermittent bubbling mode. Key surfactant properties, including the surface activity, diffusion coefficient, and saturated equilibrium surface excess, were found to govern these reaction mechanisms. Besides, the addition of SDBS increased the relative contribution of interfacial reactions from an average of 55.9 % to 70.1 %, representing a 14.2 % enhancement in interfacial reaction dominance compared with the SDBS-free system. This study demonstrates the potential of VUV/UV/MNB process for effectively treating wastewaters enriched with surfactants.
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APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Jinlong Cui,Chengui Zhang,Yalong Li,Yang Liu,Weijun Jiang,Yuhui Wen,Zhenxi Wang,Zhonghua Yu,Xiangrong Ren,Zhifu Zhang
The selective hydrogenation of cinnamaldehyde (CAL) is a key reaction for producing valuable intermediates in pharmaceuticals, fragrances, and fine chemicals. However, achieving high selectivity toward the C=O bond reduction of CAL under mild conditions remains challenging. In this study, an efficient and sustainable photocatalytic strategy for the selective transfer hydrogenation of cinnamaldehyde to cinnamyl alcohol under mild conditions was reported. The low-loading 0.5 wt% Au/TiO 2 -CeO 2 and 0.5 wt% Pt/TiO 2 -CeO 2 catalysts were prepared by sol–gel and ultraviolet deposition method. Experimental results show that heterojunction is formed by doping CeO 2 with TiO 2 . The light absorption of materials is redshifted, and the separation of photogenerated electron-hole pairs is enhanced, thereby reducing the load usage of precious metal. The 0.5 wt% Au/TiO 2 -CeO 2 catalyst exhibits optimal performance under visible light irradiation, while the 0.5 wt% Pt/TiO 2 -CeO 2 catalyst exhibits excellent activity under ultraviolet light irradiation. The conversion efficiency in 0.5 wt% Au/TiO 2 -CeO 2 catalytic system under visible light is 97.23 %, and the selectivity can reach 96.91 %. Recycling tests verified the structural stability and reusability of the prepared catalysts. The formation of heterojunction structures can effectively reduce the load of precious metal while maintaining high conversion and selectivity. These findings provide a new pathway for achieving highly selective CAL hydrogenation under mild conditions.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Zhiyu Zhang,Mingming Zhang,Min Wu,Feng Jiang,Youhong Wang,Mang Wu,Liang Zhou
To enhance the application potential of lignin, lignin-based thermoplastic elastomers were developed by utilizing sustainable monomers. This work used grafting strategy to introduce terpene-derived monomer tetrahydrogeraniol acrylate (THGA) and tetrahydrofurfuryl methacrylate (TFMA) derived from furfural into lignin to obtain sustainable lignin-based thermoplastic elastomers. The findings indicate that the long-branched structure of THGA enables the lignin-based elastomer to achieve a reduced T g . By modifying the ratio of the two biomass monomers, the T g and mechanical properties can be regulated. Lignin plays an indispensable role in enhancing mechanical action. With identical monomer molar ratio input, lignin graft copolymers exhibit superior mechanical properties compared to linear copolymers. For instance, the fracture stress of Lignin0.50-PTFMA700 is 6.3 MPa, the fracture elongation is 277 %, the fracture stress is 2.5 times higher than PTFMA700, moreover, Lignin0.59-PTFMA500 also has good elastic recovery ability. Meanwhile, Lignin0.59-PTFMA500 exhibits excellent adhesion to various substrates, with a shear strength of 2.0 MPa on glass substrates. Additionally, these lignin-based thermoplastic elastomers also possess outstanding ultraviolet absorption performance. This offers a novel research idea for developing sustainable functional monomers and broadening the high-value addition of lignin.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Tanji Yin,Shuangqing Mu,Wei Qin
The construction of the strong interfacial adhesions among the conductor substrate, solid-contact transducer and ion-selective membrane is required for developing the stable and robust solid-contact ion-selective electrodes (ISEs). Herein, a robust solid-contact CO 3 2− -ISE was constructed through the photocurable polyacrylate membrane attached on the mercapto polyethylene glycol acrylate (SH-PEG-Ac) modified nanoporous gold (n-PG)/gold electrode. The n-PG, acting as a solid contact, was fabricated by using the electrochemical alloying/dealloying method, and SH-PEG-Ac was covalently self-assembled on the n-PG film/gold electrode through the strong Au S bond and used as a reactive site for the covalent linkage to the polyacrylate-based ion-selective membrane through the UV photopolymerization method. The proposed solid-contact CO 3 2− -selective electrode displays a Nernstian potential response in the activity range of 5.2 × 10 −5 –5.1 × 10 −4 M CO 3 2− with the detection limit of 2.6 × 10 −5 M and the slope of 27.5 ± 0.6 mV/dec. The proposed electrode also exhibits satisfactory robustness, due to the anchored polyacrylate-based membrane in the nanoporous structure of the n-PG film. This work reports a favorable strategy to promote the interfacial adhesion among the electronic conductor, solid contact and ion-selective membrane, and is promising for developing other stable and robust solid-contact ISEs.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2025
·
IF 7.8
Zhuowen Yang,Ke Feng
The Fe 0 /H 2 O 2 system, which is capable of removing organic matter from wastewater, suffers from limited efficiency because of slow Fe 2+ release and restricted Fe 2+ /Fe 3+ cycling. This study investigated the performance and mechanism of a UV-enhanced Fe 0 /H 2 O 2 system for the removal of organics in semiaerobic aged refuse biofilter (SAARB) effluent from landfill leachate, with HO • identified as the primary reactive oxygen species. UV not only initiates a homogeneous Fenton reaction through direct photolysis of H 2 O 2 and promotes Fe 2+ release from Fe 0 but also accelerates surface corrosion of Fe 0 to form more iron oxides, which react with H 2 O 2 in a heterogeneous Fenton reaction, thereby generating HO • at a faster rate. HO • preferentially reacts with organics containing chromophores or auxochromes, attacks humus with abundant conjugated structures, converts them into smaller organic molecules, and even achieves mineralization. Increasing the Fenton reagent ratio and dosage enhances the removal performance of the UV/Fe 0 /H 2 O 2 system, with optimal organic removal observed under acidic conditions. Ultimately, optimal conditions of the UV power (10 W), Fe 0 (2 mM) and H 2 O 2 (12 mM) dosages at pH 3.0 achieved 84.48% CN, 90.06% UV 254 , and 62.84% TOC removal. This study provides a feasible solution for achieving discharge standards for landfill leachate.
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