CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Houkai Huang,Wenjing Li,Juncheng Wei,Yiqiang Wu,Dongying Hu,Fangchao Cheng
Moist-electric generation typically exploits water molecule diffusion or ionic concentration gradients, but constructing highly differentiated hydrophilic-hydrophobic surfaces for efficient power generation remains challenging. To address this, we developed a highly stable cellulose film matrix with superior moisture response via a dual-crosslinked strategy. Crucially, this achieves bionic in-situ calcification through forming a CaCO 3 surface layer. Sequentially, this robust matrix facilitates the creation of a stable hydrophilic-hydrophobic differential surface to fabricate a sandwich-structured LiCl/DNF/CaCO 3 -SiO 2 transparent film. The resulting thin film (40 μm) device sensitively detects ambient humidity changes. A single component achieves a sustained open-circuit voltage of 1.5 V . It can charge a 10 μF capacitor to 10 V within 1 h, powering small devices like light bulbs and calculators. The enhanced water contact angle difference of 131° between surfaces significantly boosts the humidity gradient and electrochemical output. This work demonstrates the feasibility of powering small electronics and provides a novel pathway for green, high-performance energy-harvesting film devices and lightweighting units.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2025
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IF 8.9
Yunfeng Guo,Weihua Gong,Jiayu Liu,Xiangyu Tang,Dong Wang,Zefang Xiao,Yanjun Xie,Yonggui Wang
Traditional COF nanosheets (CONs) suffer from poor mechanical properties due to weak interactions, which limits their widespread application in water treatment. This study proposes a multidimensional assembly strategy by combining them with one-dimensional cellulose nanofibrils (1D-TCNFs) to fabricate a multidimensional composite nanofiltration membrane. In this structure, the flexible TCNFs not only enhance the stability of the composite membrane but also significantly improve the membrane’s flux and rejection efficiency through enhanced pore size exclusion effects and charge synergistic mechanisms. Specifically, two-dimensional covalent organic framework nanosheets (2D-CONs) were synthesized using a sodium chloride interface confinement technique, and the CONs were further modified with sulfonic acid groups (SCONs) via thiol-ene click chemistry, significantly improving the hydrophilicity and pore structure of the nanosheets. Separation tests demonstrated that the T 75% SCONs membrane achieved a rejection rate of over 99 % for RhB filtration, with a permeation flux increase of 209 % compared to the T 75% CONs membrane. For inorganic salt MgSO 4 , the permeation flux increased by 187 %, with a rejection rate of 40.3 %. Long-term stability tests also showed that the T 75% SCONs membrane maintained excellent performance over multiple filtration cycles. In conclusion, the multidimensional assembled nanofiltration membrane based on sodium chloride interface confinement synthesis and click modification provides a novel solution for developing efficient water treatment technologies.
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JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
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2025
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IF 3.7
Kaiqiang Liu,Wenli Tang,Lieqiang Luo,Guihai Li,Haiping Wang,Xingguo Zhang
In this study, cellulose nanofibres (CNFs) with different structures were prepared using ball-milling and 2,2,6,6-tetramethylpiperidine-1-oxyl-mediated (TEMPO) oxidation. Then, microcalorimeter, scanning electron microscope, electrical conductivity, and micro-CT were used to investigate the interaction mechanisms between the CNFs and cement slurry. The results showed that the combination of ball-milling and TEMPO oxidation produced CNFs with carboxyl functional groups. When the NaClO concentration was 2 mmol/g and oxidation time was 2 h, the carboxyl content on the surface of the nanofibres was 0.0856 mmol/g. Based on the hydration rate and electrical conductivity results, the carboxylated CNFs reduced the hydration rate of the cement slurry and delayed the exothermic peak by 0.5–2.3 h. The decrease rate of the electrical conductivity of the cement slurry during transition stage increased from 2.805 to 3.543–5.142 mS/(cm·h). The electrical conductivity of the solid–liquid two-phase cement slurry was mainly provided by the pore solution. The decrease in the electrical conductivity of the cement slurry during the transition stage could mainly be attributed to the formation of hydration products that changed the microstructure of the cement slurry from ‘dispersed particles’ to a ‘gel grid’ during the hydration acceleration stage, the porosity and pore connectivity of cement slurry are reduced. The zeta potential results indicate that CNF in the cement slurry provides a location for the nucleation and growth of early hydration products through adsorption and bridging effects, changes the microstructure of the cement slurry, and accelerates the transition from liquid to solid state.
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FOOD CHEMISTRY
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2025
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IF 9.8
Yuanying Chen,Tianran Lin,Shuangshuang He,Qi Jiao,Shulin Zhao,Li Hou
Malathion plays an important role in agricultural production, and the accurate detection of malathion residues is essential to ensure food safety. A novel enzyme-free sensing method was proposed by employing bimetallic magnetic nanozymes for both colorimetric quantification and multicolor semi-quantitative detection of malathion. The nanozyme exhibits peroxidase-like activity, catalyzing H 2 O 2 -mediated oxidation of 3,3′,5,5′-Tetramethylbenzidine dihydrochloride (TMB). Malathion inhibits this activity via Zr O P coordination, reducing oxidized TMB (oxTMB) generation. Under acidic conditions, oxTMB is further converted to TMB 2+ , which etches gold nanorods, inducing aspect-ratio variations accompanied by distinct multicolor changes. This method demonstrates low detection limits of 0.68 ng/mL. It does not require biological enzymes and can semi-quantify the malathion concentration through color changes. Thus, it can achieve convenient and accurate quantitative analysis without instruments, meeting on-site detection requirements. This work contributes to food safety and the development of efficient and reliable methods for malathion detection.
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ACS Applied Nano Materials
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2024
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IF 5.3
Sha Wang,Zhu Shan,Mehraj Ahmad,Zhouyue Li,Zhe Sun
Nanofluidic membranes utilize selective ion transport to capture osmotic energy from salinity gradients, efficiently converting it to electrical energy. However, traditional nanofluidic material synthesis still encounters challenges, including low charge density, high ion transport energy barriers, and limited current output. Here, we present a composite membrane consisting of hole-enriched graphene oxide (HGO) and cellulose nanofibers (CNF), engineered to enhance ion transport and energy conversion. HGO facilitates direct ion transfer through the nanopore within lamellar layers, effectively reducing the transmission distance and lowering the energy barrier for ion movement, thus enabling faster ion transfer between layers. CNF, on the other hand, offers robust mechanical strength and numerous active groups, imparting high ion selectivity to the nanoporous membrane. An osmotic energy generator utilizing the HGO/CNF membrane achieved a peak power density of 1.25 W m–2. Notably, the cationic transference number and energy conversion efficiency peaked at 0.84 and 23.64%, respectively, under a 500-fold concentration gradient. Additionally, the HGO/CNF composite membrane exhibits a robust tensile strength of 78.51 MPa, underscoring its excellent mechanical properties. The above results suggest that this highly ion-selective and energy-efficient composite membrane presents a promising avenue for advancing osmotic energy research.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yan Sun,Yue Jing,Zhicheng Wang,Mingjie Huang,Wen-Da Oh,Xiaohui Wu,Tao Zhou
Ubiquitous pyrite (FeS 2 ) in the earth’s crust features strong reducing capacity, presenting a promising alternative for molecular oxygen (O 2 ) activation to facilitate water purification, but the interfacial electron transfer efficiency was remarkably retarded due to the existed passivation layer and limited reactive sites on the surface of pristine pyrite. Herein, we proposed an effective mechanochemical approach to unlock the potential of pyrite for O 2 activation and refractory pollutant degradation. Compared to the inert pristine one, the ball milling-treated pyrite (BMPs) could achieve efficient sulfamethoxazole (SMX) degradation with a rate constant of 0.23 h −1 . By a combination of characterizations, batch experiments, and density function theory (DFT) calculations, a clear panorama delineated the consecutive O 2 adsorption and activation processes was established. Ball milling treatment could import rich sulfur vacancies (SVs) on pyrite, which unshifted the p -band center of adjacent S for improved O 2 adsorption, also narrowed the band gap of BMPs to promote the interfacial electron transfer rate for O 2 activation. Singlet oxygen ( 1 O 2 ) was identified as the dominant reactive species for SMX degradation , such non-radical oxidation feature rendered the system with remarkable activity and environmental robustness. Our work lay a foundation for constructing robust pyrite towards stable and efficient environmental remediation applications.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zhengkai Wu,Yunning Chen,Xueying Cheng,Renquan Guan,Shuyu Chen,Yingna Guo,Qingkun Shang
How to design and optimize the single-molecule structure of perylene diimide derivatives (PDIs) to obtain high-performance photocatalysts is one of the challenges facing the current research field of PDIs photocatalysis. In this article, we regulate the π-π self-assembly stacking and optoelectronic properties of PDIs by changing the type and position of substituents on the amide site. The PDI-PBA photocatalyst with excellent performance was obtained from seven types of PDIs supramolecular materials. Theoretical calculations and optoelectronic performance tests have shown that PDI-PBA has good crystallinity and maximum dipole moment, resulting in its maximum built-in electric field, effectively promoting the separation and transport of photo-generated carriers. The transient absorption spectra further indicate that photogenerated electrons and holes of PDI-PBA have outstanding separation efficiency and ultra-long lifetime. In the batch reactor, PDI-PBA can degrade almost 100% acetaminophen within 60 min. In the dynamic cycling system with a surface hydraulic load of 14.56 L/(m 2 ·h), the efficiency of PDI-PBA photocatalytic degradation of acetaminophen can reach 84%. PDI-PBA can also effectively degrade phenol, levofloxacin, and ciprofloxacin. This work provides a successful example for the design of novel and efficient PDIs supramolecular materials, and lays the foundation for the application of PDIs photocatalysts in practical wastewater treatment.
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JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
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2024
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IF 1.7
Yuan Fu,Huanbo Wang,Yue Liu,Jinpeng Li,XianZu Sun,Tian Liu
Wood with a porous structure is the best carrier for phase change energy storage materials, which can effectively prevent material leakage during thermal cycling and ensure its shaping effect. In this work, natural poplar wood was treated with delignification and then oxidized by TEMPO as a thermal energy storage matrix. Then, it was immersed in a solution of ethanol as the solvent, polyethylene glycol (PEG) and calcium chloride as the solutes, obtaining phase change energy storage ionic wood (DTW-PCMs). The results showed that the phase change energy storage material PEG-CaCl2 was successfully impregnated into the pore structure of wood; calcium chloride was effectively combined with –COOH in TEMPO oxidized wood for intermediate bonds and formed white complex crystals with PEG2000. The maximum absorption rate and differential scanning calorimetry (DSC) test results showed that TEMPO-oxidized poplar had a maximum absorption rate of 95.26% for PEG2000-CaCl2. Additionally, TEMPO-oxidized poplar exhibited good phase transition performance and suitable phase change temperature. The latent heat of phase transition was 86.96 J/g. Thus, the novel DTW-PCMs displayed a high potential application in the field of thermal energy storage and temperature regulation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Guochen Xia,Shixu Yu,Zezhou Yang,Jingyi Lian,Yimin Xie,Qinghua Feng
Natural wood has been highly valued for thousands of years due to its excellent strength, low density, and ease of processing. However, its poor water stability, which leads to swelling and deformation, limits its competitiveness. In response, we designed a reconstructed wood through a process involving pretreatment, TEMPO oxidation, lignin self-assembly, lignin melting, and densification. In this material, cellulose serves as the skeleton, while lignin with a phenylpropyl structure acts as both a filler and binder. The resulting wood exhibits outstanding water stability, with no changes after 60 days of water immersion and a water absorption rate as low as 8.32 %. This stability is achieved through the densification of lignin, which is enhanced by lignin melting and pressure during self-assembly. The reconstructed wood not only offers excellent water stability but also boasts superior UV resistance and thermal stability. Additionally, it can be hot-pressed into straws within a mold, providing better water stability and tensile strength compared to paper straws. This reconstructed wood, made from natural wood and corncob, is biodegradable and environmentally friendly, offering a new approach to wood water stability strategies.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Jiamin Huang,Hong Zhao,Xinlian Chen,Tianran Lin,Li Hou,Shulin Zhao
To meet the increasing demands for highly active and stable nanozymes for bioanalysis, Pt nanoparticles (NPs) were successfully supported on the surface of hydrogen-bonded organic frameworks (Pt/HOFs) to obtain a stable, multifunctional and highly active nanozyme for the colorimetric detection of alkaline phosphatase (ALP). Through a redox reaction, Pt precursors are reduced to ultrasmall Pt NPs that are loaded on HOFs. The Pt/HOFs nanozyme showed excellent oxidase-like, peroxidase-like and some catalase-like activity. To avoid the signal instability caused by H 2 O 2 decomposition, the oxidase-like activity of Pt/HOFs was applied for the detection of ALP using 3,3′, 5,5 ′-tetramethylbenzidine (TMB) as a chromogenic substrate. When the substrate L-ascorbic acid 2-phosphate (AAP) is present, ALP can catalyze AAP to produce strongly reductive ascorbic acid (AA). AA can reduce the oxidation product of TMB. Therefore, a colorimetric sensing strategy for ALP detection was constructed. The linear range of the strategy was from 0.5 to 8 mU mL −1 , and the detection limit was 0.46 mU mL −1 . Finally, the strategy was successfully applied to the detection of ALP in human serum, which provided a reliable strategy for the colorimetric detection of clinical ALP. This study not only presents a simple approach to maintain the high activity of nanoparticle-based nanozymes, but also expands the application of multifunctional HOF-based materials for future applications.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yating Shi,Changmei Lin,Peiwei Deng,Leo N.Y. Cao,Weiguo Wang,Wanjing Li,Hezhi Lin,Yun Yang,Hao Wang,Meidan Ye,Zijie Xu,Shilin Cao,Wenxi Guo
As wearable devices in the fields of medical health, human–computer interaction, and motion detection continue to diversify in their materials and forms, they show vast application potential. Cellulose materials are emerging as prominent materials for fabricating flexible wearable electronic devices because of their favorable skin compatibility, cost-effectiveness, and abundance. However, there is little research on the use of kapok cellulose in wearable electronics. This study addresses this knowledge gap by exploring the high-yield production and waste recycling potential of kapok cellulose. To overcome the limitations of conventional cellulose films, such as poor flexibility, high haze, and limited light transmittance, a kapok cellulose nanofiber film (KCNF) with a transparency of > 90 % and a tensile strain of > 20 % is prepared. The use of the KCNF as a friction electric material in the triboelectric nanogenerator (TENG) improves its electrical output performance by 228 % and permits its comfortable long-term attachment to the skin for self-powered tactile sensing applications, including game control, text input, and smart medical devices. This study demonstrates that the exploration of KCNF materials expands the options available for developing wearable electronic devices with numerous potential applications.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Junjie Zhou,Wenhua Gao,Hanbing Jiang,Zhouyang Xiang,Jinpeng Li,Daxian Cao,Jinsong Zeng,Bin Wang,Jun Xu
Surface-enhanced Raman spectroscopy (SERS) has gained attention as a sensitive technique for the detection of pesticide residues. However, constructing homogeneous, stable, and large-volume “hot spots” is a challenge. In this study, D-T-CNFs@Ag SERS substrates were fabricated by decorating a flexible dialdehyde TEMPO-oxidized cellulose nanofibril (D-T-CNF) film with silver nanoparticles (AgNPs). Carboxylate groups and aldehyde groups on cellulose nanofibrils were used as the growth sites for AgNPs and the main reducing agents for forming three-dimensional “hot spots”, respectively. D-T-CNFs provided protection and immobilization for the AgNPs, allowing SERS substrates to withstand intense ultrasonic treatment, and had a shelf life of over 60 days. In addition, thiram and thiabendazole could be detected at a concentration as low as 10–9 M. The D-T-CNFs@Ag SERS substrate could be used to test thiram on the surface of apples, with a limit of detection (LOD) of 0.047 ng/cm2, realizing the integration of collection and detection.
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