JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Yue Ke,Lujian Lin,Guanglong Zhang,Hualong Hong,Chongling Yan
Mesh-structured films formed by the post-processing of microfibers improves their permeability and dexterity, such as disposable masks. However, the aging behavior and potential risks of mesh-structured microfibers (MS-MFs) in landfill leachate remain poorly understood. Herein, the aging behavior and mechanisms of MS-MFs and ordinary polypropylene-films (PP-films) microplastics , as well as their leaching concerning dissolved organic matter (DOM) in landfill leachate were investigated. Results revealed that MS-MFs underwent more significant physicochemical changes than PP-films during the aging process in landfill leachate, due to their rich porous habitats. An important factor in the photoaging of MS-MFs was related to reactive oxygen species produced by DOM, and this process was promoted by photoelectrons under UV irradiation. Compared with PP-films, MS-MFs released more DOM and nano-plastics fragments into landfill leachate, altering the composition and molecular weight of DOM. Aged MS-MFs-DOM generated new components, and humus-like substances produced by photochemistry showed the largest increase. Correlation analysis revealed that leached DOM was positively correlated with oxygen-containing groups accumulated in aged MS-MFs. Overall, MS-MFs will bring higher environmental risks and become a new long-term source of DOM contaminants in landfill leachate. This study provides new insights into the impact of novel microfibers on landfill leachate carbon dynamics.
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INDUSTRIAL CROPS AND PRODUCTS
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2025
·
IF 6.2
Huangjingyi Chen,Chong Tang,Xiaorui Liu,Shaoning Wang,Wenpin Tan,Qingyang Lin,Liang Liu,Juan Yu,Zhiguo Wang,Yimin Fan
Flexible conductive elastomers have exhibited high performance with excellent weather resistance, but remain significant challenges in modern scientific research. This study introduces an innovative method for constructing conductive elastomers based on amino functionalized nanocellulose (ε-PL-TOCN) and poly(deep eutectic solvents) (PDES). This elastomer (ε-PL-TOCN/PDES) has been successfully applied to flexible sensors, cryptographic information transmission, and triboelectric nanogenerators (TENG). Furthermore, integrating these elastomers as TENG electrodes may facilitate the development of self-powered wearable devices, thus opening new avenues in energy harvesting technology. The method involves incorporating glycidyl methacrylate (GMA) into a DES matrix dispersed with ε-PL-TOCN, facilitating in-situ polymerization through ring-opening reactions between GMA's epoxides with ε-PL-TOCN and DES. Thus, a dual crosslinked network comprising physical and chemical interactions is formed. Furthermore, at a 2 wt% ε-PL-TOCN content, the elastomer exhibits impressive mechanical properties, with a tensile strength of 3.24 MPa and an elongation at break of 1698.99 %. The formation of a dense hydrogen-bonded network by ε-PL-TOCN significantly enhances the elastomer's mechanical strength, anti-freezing ability, and solvent resistance. These properties enable the application in flexible sensors and TENGs, effectively monitoring human motion, transmitting secure information, and harvesting mechanical energy to produce stable electrical outputs, such as lighting LEDs. Thus, this research presents a promising strategy for utilizing ε-PL-TOCN in the fabrication of multifunctional flexible electronic devices for applications in extreme environments.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Yan Ke,Mingzhu Yuan,Xinglong Li,Yuan Liu,Yangyang Li,Yuanxu Liu,Xiangang Lin,Qinghua Liu,Yupeng Yuan
Improving electron delocalization and optical absorption properties of graphitic carbon nitride (g-C 3 N 4 ) is essential for enhancing the performance of photocatalytic wastewater treatment. Herein, an enhanced electron delocalization with activation n-π∗ electronic transitions of g-C 3 N 4 (TCN m ) by embedding electron-rich pyrimidine units into the g-C 3 N 4 skeleton was successfully fabricated. Experimental characterizations and density functional theory calculations demonstrated that the precise incorporation of pyrimidine units into the g-C 3 N 4 skeleton reduces the degree of overlap of positive and negative charge centers, enhances the delocalization of conjugate electrons, and facilitates carrier separation. Furthermore, this novel structure introduced additional n-π∗ electronic transitions, extending the light-absorbing edge beyond 700 nm. As a result, after 60 min of light irradiation, TCN m exhibited the highest kinetic constant (0.0287 min −1 ) in the degradation of tetracycline, which was ∼3.8 times higher than that of pristine g-C 3 N 4 . In particular, the optimal antibacterial rate for Staphylococcus aureus reached 88.3% after 4 h of light exposure. These findings illustrate the remarkable potential of TCN m in addressing antibiotic and microbial contamination in water.
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Environmental Science-Nano
·
2024
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IF 5.8
Kaijie Ni,Ruiqi Xu,Yanlong Chen,Ming Guo
Metal-free photocatalytic degradation of pollutants is an eco-friendly green method for wastewater remediation. Herein we reported using amine modified alginate as an anchor line, as well as graphene oxide (GO) and carbon nanotubes (CNT) as photoactive units to fabricate a recyclable metal-free photocatalytically active hybrid fiber via facile carbodiimine-mediated amide coupling and calcium ion crosslinking. The results show that the photoactive fiber with unique microporosity and enhanced thermal stability has been successfully prepared. The prepared fiber presented a significantly photo-enhanced removal effect on tetracycline (TC). The efficiency of TC removal promoted by the fiber under solar irradiation is 10 times higher than that under dark. In the photocatalytic treatment of TC, the fiber also showed higher TC removal efficiency than that of GO and CNTs alone due to the synergistic effect of GO/CNT. Electron spin resonance analysis confirmed that the fiber under solar irradiation induced the generation of 1O2 and holes (h+) which degraded TC. UV-vis spectra analysis indicated that GO and CNT components in the fiber promoted TC to undergo oxidative degradation. Major transformation products during TC removal were identified with liquid chromatography mass spectrometry. Finally, such photoactivity of the fiber can be utilized to develop a convenient irradiation/agitation regeneration approach to make the fiber adsorbent reusable. The recycled fiber maintained an excellent level of TC removal performance after multiple recycling steps. Overall, this study provides a new strategy of preparing a recyclable metal-free photocatalytic material for water treatment, and is of great reference value for research in this field.
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CARBOHYDRATE POLYMERS
·
2024
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IF 10.7
Siyuan Xia,Yujie Duan,Shanshan Yu,Yupei Sun,Hongxiang Zhu,Zihan Zhao,Lei Wang,Hui Liu,Yingping He,Hui He
The detection of pH and glutathione (GSH) is positively significant for the cell microenvironment imaging. Here, to assess the pH value and the concentration of GSH efficiently and visually, a cellulose-based multi-bands ratiometric fluorescence probe was designed by assembling MnO 2 -modified cellulose gold nanoclusters , fluorescein isothiocyanate-grafted cellulose nanocrystals (CNCs) and protoporphyrin IX-modified CNCs. The probe exhibits GSH-responsive, pH-sensitive and GSH/pH-independent fluorescent properties at 440 nm, 520 nm, and 633 nm, respectively. Furthermore, the probe identifies GSH within 4 s by degrading MnO 2 into Mn 2+ in response to GSH. Ingeniously, the green fluorescence of the probe at 520 nm was decreased with pH, and the red fluorescence at 633 nm remained stable. Therefore, the probe displayed distinguishing fluorescence colors from pink to blue and from green to blue for the synchronous detection of pH and GSH concentration within 4 s. The design strategy provides insights to construct multi-bands fluorescence probes for the rapid detection of multiple target analytes.
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Small
·
2025
·Vol. 21
·期 8
·2407438
·
IF 12.1
Xunhong Gu,Wanhua Wang,Jinyu Kang,Xinrui Dong,Peilin Guan,Bo Li
Degradable and cost-effective cellulose fiber-based materials are ideal substitutes for traditional plastics. However, organic additives used to enhance water and oil resistance often contain toxic substances that may migrate into food, posing health risks. In this study, inspired by tree structures, lignin-containing cellulose nanofibers (LCNFs) are used to form a “crown-roots” structure to enhance the water, oil, and gas resistance, as well as mechanical performance of composites. Mechanically fibrillated LCNFs (M-LCNFs), representing the tree roots, are blended with bamboo pulp and bagasse pulp to prepare cellulose fiber substrate. LCNFs films, representing the crown, are produced via a sol–gel method to improve the substrate's barrier properties. The LCNFs gel, representing the trunk, bonds the films to the substrate via hydrogen bond. The resulting material shows exceptional behaviors including 1) excellent water and oil resistance (Cobb value and WVTR decreased by 75.27% and 16.43% compared to the substrate, with a maximum kit value of 12), 2) outstanding mechanical performance (tensile index is 103.19 N·m g −1 ), and 3) good natural degradability. This material holds significant potential for industries with high safety standards, such as food, cosmetics, and medicine.
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Advanced Science
·
2024
·Vol. 11
·期 41
·2402705
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IF 14.3
Yue Jiang,Lin Fan,Xilong Sun,Zehe Luo,Herong Wang,Rucong Lai,Jie Wang,Qiyang Gan,Ning Li,Jindong Tian
Humans recognize and manipulate objects relying on the multidimensional force features captured by the tactile sense of skin during the manipulation. Since the current sensors integrated in robots cannot support the robots to sense the multiple interaction states between manipulator and objects, achieving human-like perception and analytical capabilities remains a major challenge for service robots. Prompted by the tactile perception involved in robots performing complex tasks, a multimodal tactile sensory system is presented to provide in situ simultaneous sensing for robots when approaching, touching, and manipulating objects. The system comprises a capacitive sensor owning the high sensitivity of 1.11E-2 pF mm −1 , a triboelectricity nanogenerator with the fast response speed of 30 ms, and a pressure sensor array capable of 3D force detection. By Combining transfer learning models, which fuses multimodal tactile information to achieve high-precision (up to 95%) recognition of the multi-featured targets such as random hardness and texture information under random sampling conditions, including random grasp force and velocity. This sensory system is expected to enhance the intelligent recognition and behavior-planning capabilities of autonomous robots when performing complex tasks in undefined surrounding environments.
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Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Xuwen Da,Yunli Xu,Lei Wang,Xiulian Liu,Yatong Peng,Yao Wu,Wanpeng Zhou,Wentao Wang,Xuesong Wang,Qian-Xiong Zhou
Traditional photodynamic therapy (PDT) is almost ineffective against deeply seated tumors due to the limited penetration depth of external light. The development of chemiexcited PDT is promising to address this issue, but it is still challenging to construct simple, efficient and targeted chemiexcited PDT systems. In this work, CPPO (bio(3,5,6-trichloro-2-n-pentyloxycarbonylphenyl) oxalate) and [Ru(phen)2(PIP-OCH3)](PF6)2 (Ru3, where phen = 1,10-phenanthroline, PIP-OCH3 = 2-(4-methoxy phenyl)-1Himidazo[4,5-f][1,10]phenanthroline) with efficient photo-catalytic NADH oxidation were co-encapsulated with DSPE-PEG 2000 to form Ru3/CPPO@PEG nanoparticles (NP3). Once internalized by cancer cells, Ru3 can be excited by the chemical energy produced by the reaction between CPPO and endogenous H2O2. The subsequent oxidation of intracellular NADH and generation of H2O2 in situ by excited Ru3 will further promote the sustained occurrence of chemical reaction, realizing a self-enhanced chemiexcited PDT. NP3 could effectively deplete intracellular NADH, inhibit ATP synthesis, increase H2O2 content, and produce reactive oxygen species (ROS) within cancer cells, thus exhibited efficient chemiexcited PDT activity against various cancer cells. Notably, minimal cytotoxicity was observed towards normal cells. Good therapeutic effects against subcutaneously implanted and lung metastatic tumors were also observed for NP3. The current findings may provide new sights for development of novel chemiexcited PDT.
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Food Packaging and Shelf Life
·
2025
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IF 10.6
Feng Cai,Zhengyin Duan,Dehai Yu,Zhaoping Song,Peng Lu
The incorporation of lemon essential oil (LEO) into cellulose nanofibrils (CNF) shows great promise in the field of sustainable antimicrobial packaging, but is challenged by poor water dispersibility of LEO and the low retention within the film. In this study, nanocellulose microgel (MG) was designed as particle stabilizers for emulsifying LEO and highly stable high internal phase Pickering emulsions (HIPE) were successfully fabricated. MG particles were constructed through chemical bonding of polyethyleneimine onto 2,2,6,6-tetramethylpiperidinyl-1-oxide (TEMPO)-oxidized nanocellulose, characterized with excellent interfacial wetting properties (reduction of oil-water interfacial tension from 11.36 to 7.84 mN/m) and antimicrobial activity (the MIC for Listeria monocytogenes was 125 μL/mL). The HIPE was obtained by dispersing LEO into MG water dispersion (0.5 wt%). The HIPE with LEO fraction as high as 75 % maintained stability within pH 5 to pH 9 without phase separation after 6 days. Films cast from HIPE and CNF blends have excellent integrity and high LEO content (38.94 %). When HIPE was added at 9.6 wt%, LEO was effectively encapsulated by CNF and MG, embedded in the film with high retention, and exhibited significant antibacterial effects against Listeria monocytogenes , antibacterial rate up to 100 %. This work, based on MG, achieves high internal phase emulsification of LEO and enhanced retention within the film, providing a novel perspective and strategy for efficient encapsulation of essential oils and their economical application in antimicrobial packaging.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chuhang Liu,Xinyue Liu,Xiaojie Shi,Guoqiang Zhou,Chaozheng Liu,Changtong Mei,Mei-Chun Li
The rapid global increase in the consumption of fossil energy had led to urgent environmental issues, thereby prompting vigorous efforts towards the development and application of renewable energy. The effective encapsulation of phase change materials (PCMs) is crucial and indispensable for achieving high-performance solar-thermal energy harvesting and storage. However, challenges persist in the manufacturing of PCMs encapsulations with customizable and intricate structures to meet diverse scenarios. Herein, a PCMs Pickering emulsion gel ink, based on lignocellulosic nanofibers (LCNFs)/graphene oxide (GO) nanosheets stabilized paraffin, has been prepared to fabricate customized PCMs using 3D printing techniques for solar-thermal-electric conversion applications. The micro-nano matrix consisting of LCNFs and GO nanosheets provides a stable oil/water (O/W) interface, limits movements and deformability of paraffin microsphere, thereby increasing the viscosity and stiffness of the PCMs Pickering emulsion gel ink to ensure its excellent rheological property. Moreover, the LCNFs enhance printability and shape fidelity of the ink as interfacial stabilizer and viscosity modifier, which facilitates the manufacture of various 3D geometries. As a result, the designed concave PCMs solar harvester not only exhibits exceptional solar-to-thermal conversion efficiency, but also effectively mitigates heat loss and enables efficient heat storage for electricity generation. Our work demonstrates a new way toward utilization of LCNFs as PCMs emulsion stabilizers and encapsulants in PCMs and the fabrication customized PCMs architectures for solar-thermal-electric conversion applications using 3D printing techniques.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bo Sun,Yu Tian,Menglin Feng,Sihan Zhang,Hong Yang,Junmei Qin,Wenlong Bi,Xingxing Qiao,Fenwu Liu,Qingjie Hou
Flocculation is often used for the preliminary treatment of wastewater. However, pollutants especially some emerging contaminants, cannot be completely removed in this process. Meanwhile, the flocculated sludge may cause secondary pollution to the environment. This study investigates producing functional sludge biochar (FBC) from flocculated sludge obtained in the initial wastewater treatment phase, then introducing functional elements (Fe 3+ , Cu 2+ , Zn 2+ , and N) derived from flocculated sludge to modified waxberry-shaped TiO 2 photocatalyst. The next step involved using FBC/TiO 2 with functional elements for the deep degradation of swine wastewater. Under simulated sunlight, FBC/TiO 2 demonstrated a COD removal efficiency is 51.35 %, which is 2.65 times greater than that of pure TiO 2 . Furthermore, FBC/TiO 2 showed enhanced removal of dissolved organic matter (fulvic-like acids and soluble microbial products) and biotoxic substances from wastewater under both sunlight and visible light, particularly exhibiting significant efficacy in the removal of hard-degradation humic-like acids. In the photocatalytic process, water molecules oxidation by h + generates •OH, the primary reactive oxygen species responsible for organic matter degradation in wastewater. Applying this process to prepare FBC 15 /TiO 2 can lower sludge treatment costs for wastewater treatment plants while generating a profit of 52.28 $·kg −1 . This research offers a win–win solution for treating swine wastewater, promoting sludge reuse, and reducing the cost of TiO 2 deployment, thus presenting a new approach for efficient, cost-effective treatment of livestock and poultry wastewater.
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Nano Energy
·
2024
·
IF 16.8
Xue Tang,Bei Jiang,Qingtao Zhu,Xianfen Chen,Lei Xiao,Lijun Zhou,Junyan Chen,Jiabin Chen,Zhigao Liu,Quanping Yuan
ABSTRACT The multi-functionalization on wood and its derivant has gained more and more attention for its resource-rich, reproducible and biodegradable properties. In this work, a wood-based multifunctional composite displaying piezoelectric and moist-electric performance has been proposed. Wood porous material (WPM) was firstly prepared by delignification, oxidation and impregnation with MXene, in which zinc oxide (ZnO) was loaded via hydrothermal synthesis method. It can be found that the negative charge on the porous surface in MXene-impregnated WPM can attract Zn 2+ by electrostatic adsorption, creating a large number of nucleation sites for the growth of ZnO, thus accelerating its nucleation rate. Moreover, the increase of ZnO loading can enhance the fluidization current, so the obtained OWPM/MXene/ZnO moist-electrical generator (MEG) can generate an open-circuit voltage (V OC ) of 0.75 V at a test humidity of 85%RH, as well as can collect energy from hot steam with the V OC of about 0.4 V. Simultaneously, the heterojunction formed between ZnO and MXene further enhance the piezoelectric performance. Finally, a piezoelectric generator (PEG) with anisotropic piezoelectric sensing properties was prepared by the impregnation with polydimethylsiloxane (PDMS) in OWPM/MXene/ZnO and the follow densification. It can generate a V OC up to 4.71 V when a force of 45 N was applied perpendicular to the fiber direction. The four PEGs series connection can light up a LED. Consequently, the application performance of MEGs and PEGs based on wood materials highlight potential in piezoelectric and hydroelectric harvesters.
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危险品化学品经营许可证（带存储）