APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Bo Li,Xuxia Zhang,Xin Yang,Yuhong Xu,Weilong Chun,Qingqing Hao,Jianbo Zhang,Zhuo Li,Huiyong Chen,Xiaoxun Ma
Ti 3+ defective TiO 2 nanoparticles (TiO 2 -NPs) were synthesized through slow hydrolyzation of tetrabutyl titanate and low-temperature annealing, followed by loading on self-pillared pentasil (SPP) zeolite nanosheets to construct a TiO 2 /zeolite hybrid composite by solid-state dispersion. The obtained TiO 2 -NPs/SPP composite exhibited a distinct red-shift in the UV–vis absorption spectrum and a significantly reduced band gap due to the introduced Ti 3+ defects and the consequent oxygen vacancies (V O ), leading to an enhanced visible-light responsivity. The diverse porosity and house-of-cards nanosheet morphology of the SPP support not only promoted the efficient loading and stable immobilization of TiO 2 -NPs nanoparicles through micropore migration and surface adhesion but also endowed the adsorbability to the TiO 2 -NPs/SPP composite. The adsorptive photodegradation of methylene blue (MB) was used to evaluated the photocatalytic performance of TiO 2 -NPs/SPP, and a 95.6 % degradation rate of MB was observed after 3 h illumination with visible-light. The adsorptive effect strongly promoted the accessibility of MB molecules to the active TiO 2 species, leading to a remarkable enhancement in degradation efficiency. Moreover, a superior recyclability embodied in the retention of 96.4 % photocatalytic activity after three regeneration cycles indicated the TiO 2 -NPs/SPP composite to be practical for water pollutant degradation.
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MACROMOLECULES
·
2025
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IF 5.2
Ronghao Li,Junping Zheng
Despite the solution of the recycling difficulty of traditional thermosetting polymers including polydimethylsiloxane (PDMS) with the development of vitrimers, addressing the trade-off among the mechanical, reprocessing, and thermal properties of PDMS remains a scientific challenge. Herein, a novel “one-stone-for-three-birds” structural design strategy based on the triple effects of Fe3+ including coordination cross-linking for reinforcement and toughening, catalytic effect on silyl ether exchange for reprocessing, and free radical quenching for thermal stabilization is reported, realizing the integration of mechanical robustness, reprocessability, and unprecedentedly high thermal stability in PDMS for the first time. The PDMS vitrimer in this work exhibits the highest thermal stability among the reported PDMS vitrimers, comparable to commercial PDMS. To elucidate the intrinsic mechanisms of the triple effects of Fe3+ in PDMS, multiple characterizations have been performed from the microscopic structure to the macroscopic mechanical, reprocessing, and thermal performances both theoretically and experimentally.
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NANOTECHNOLOGY
·
2024
·Vol. 35
·期 49
·495704
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IF 2.9
Gang Xiao,Zishuai Wang,Yu Jin,Fengping Wang
The selective cleavage of lignin C–C bonds is a highly sought-after process with the goal of obtaining low-molecular-weight aromatic chemicals from renewable resources. However, it remains a challenging task to achieve under mild conditions. Photocatalysis is a potentially promising approach to address this issue, but the development of efficient photocatalysts is still in progress. In this study, we introduce the heterostructured TiO2@g-C3N4 photocatalyst for the development of a visible light photocatalytic procedure for the selective cleavage of lignin C–C bonds under mild conditions. The photocatalyst displays favourable visible light absorption, efficient charge separation efficiency, and promising reusability. A typical β–O–4 dimer model, 2-phenoxy-1-phenylethanol, was effectively (96.0% conversion) and selectively (95.0 selectivity) cleaved under visible light at ambient conditions. This photocatalytic procedure was also effective when subjected to solar irradiation or other lignin dimer models with β–O–4 or β-1 linkages. This reaction occurred through a Cβ-centred radical intermediate and a six-membered transition state with photogenerated holes as the primary active species. The Cα–OH oxidative dehydrogenation of the substrate could also take place but was a relatively minor route. This study provides a new photocatalytic procedure for visible-light-driven lignin valorisation and sheds light on the design of high-performance nanocomposite photocatalysts for C–C bond cleavage.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Yuming Lin,Nian Xiang,Min Peng,Zuzeng Qin,Tongming Su,Hongbing Ji,Xinling Xie
Conductive hydrogels are utilized in flexible sensors due to their high-water content, excellent elasticity, and shape controllability. However, the sharp increase in resistance of this material under enormous strain leads to instability in the sensing process. This study presents a straightforward method for creating a stable, recyclable, hybrid ionic-electronic conductive (HIEC) hydrogel via a simple one-pot strategy using polyvinyl alcohol (PVA), bagasse cellulose nanofibrils (CNF), and graphene(G) with sodium dodecylbenzene sulfonate (SDBS). The SDBS/G hemimicelles are formed through hydrophobic and π-π stacking interactions between SDBS and G, enhancing the dispersibility of G. Then SDBS/G hemimicelles were integrated into a non-covalent cross-linking network from CNF and PVA, which ensures recyclability and stability. The CNF-PVA-Graphene (CPG) hydrogel exhibited high and stable sensing sensitivity (average gauge factor up to 1.99), high conductivity (0.36 S/m), low graphene concentration (0.16 wt %), low detection limit (1 %), and fast response time (0.17 s). The sensor can detect large (wrist and knee) and small (pulse and laryngeal prominence) body movements. After recycling, the hydrogel sensors maintained high conductivity sensitivity (average gauge factor up to 1.01) and good tensile properties (360 % strain). This study introduces a new approach of hybrid conductive biomass-based hydrogel sensors for precisely monitoring human movements.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xupeng Zhang,Kaiqian Li,Longxin Guo,Zhiping Xu,Shuduan Deng,Ying Liu,Gang Zhu
To effectively mitigate the global warming problem caused by excessive CO2 emissions, the implementation of direct air capture (DAC) technology has emerged as one of the most promising strategies for capturing CO2 from the atmosphere. The key to DAC technology hinges on the development of high-performance solid sorbent materials that demonstrate high CO2 adsorption capacity and gas separation selectivity, particularly under low CO2 partial pressure conditions. Herein, we have successfully developed a class of MOF@carboxylated wood sponge (MOF@CWS) hybrid sorbents, capable of efficient CO2 capture from low-concentration (less than 10,000 ppm) CO2 sources, achieved by embedding the porous MOF into carboxylated wood sponges (CWS) substrate via an in situ growth route. Within the MOF@CWS series, the CO2 uptake capacity of Mg-MOF-74@CWS is 3.61 and 2.65 mmol/g at 1 bar, 273 and 298 K, respectively, significantly higher than those of CWS and HKUST-1@CWS. Moreover, this material exhibited outstanding DAC performance, with the CO2 sorption capacity at 273 K up to 0.56 mmol/g from ambient air (ca. 400 ppm of CO2), surpassing most other solid sorbents. The obtained Mg-MOF-74@CWS also demonstrated exceptional CO2/CH4 separation performance, primarily due to the unique pore structure and augmented interaction between the CO2 molecules and the hybrid sorbents. The results of this study indicate that Mg-MOF-74@CWS has potential as an efficient solid sorbent for the DAC of CO2.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Meng Liu,Wenzhuo Lv,Fan Zeng,Canhui Wang,Xin Guo,Bo Zhou,Yiqiang Wu
Overcoming the inherent activity–stability trade-off in photo-Fenton systems requires advanced material architectures that integrate multifunctional synergies. In this study, we developed a multifunctional hydrogel, termed PCCF, fabricated by confining Fe 3 O 4 @polydopamine (PDA) nanoparticles within a three-dimensional (3D) pullulan–nanocellulose matrix specifically tailored for efficient doxycycline (DOX) elimination. PCCF exhibited a hierarchically engineered structure based on three synergistic strategies: (1) a pullulan (Pu)–cellulose nanofibrils (CNF)@carbon dots (CD) co-network with a hierarchically porous architecture (surface area: 230.6 m 2 /g), enabling ultrahigh adsorption capacity (Q m = 272.9 mg/g); (2) PDA-mediated nanoparticle immobilization to achieve spatial uniformity and reduce catalyst leaching (< 5 ppb Fe after five cycles); and (3) an optically transparent and mechanically resilient hydrogel framework (94.2 % transmittance at 500 nm, tensile strength: 41.7 kPa, elongation at break: 84.5 %). These integrated features synergistically improved the photo-Fenton degradation rate constant of PCCF by 3.03-fold compared to Fe 3 O 4 nanoparticles, while maintaining 90.4 % catalytic efficiency after five cycles. This work establishes a Pu hydrogel-based structural paradigm that harmonizes catalytic activity with long-term stability, offering a versatile blueprint for high-performance environmental remediation systems.
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CARBOHYDRATE POLYMERS
·
2025
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IF 12.5
Ya Lu,Shengnan Li,Yuanyuan Ma,Fang Deng,Yiying Yue,Shaohua Jiang,Mingqiang Ye,Yihui Zhou,Huining Xiao,Jingquan Han
Hydrogel actuators show tremendous promise for applications in soft robots and artificial muscles. Nevertheless, developing a stretchable hydrogel actuator combining remote actuation and real-time signal feedback remains a challenge. Herein, a light-responsive hydrogel actuator with self-sensing function is fabricated by employing a localized immersion strategy to incorporate polyacrylamide (PAM) hydrogel network into semi-interpenetrating carbon nanotube/2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofiber/poly(N-isopropylacrylamide) (CNT/TOCN/PNIPAM) hydrogel. CNTs impart photothermal response and electrical conductivity to the hydrogels. TOCNs facilitate the dispersion of CNTs and improve the mechanical properties of the hydrogel. The introduction of PAM further reinforces the mechanical strength and promotes the formation of gradient structure, which can prevent interlayer separation during the actuating process. The optimized CNT/TOCN/PNIPAM-PAM hydrogel actuator with enhanced tensile strength (53.0 kPa), stretchability (131.1 %), conductivity (2.5 S m −1 ) and reversible near-infrared (NIR) light responsiveness (bending velocity 6.25° s −1 ) enables a variety of precise and remote light-responsive deformations. The conductive hydrogel-based strain sensor with high sensitivity (gauge factor, 3.6) can rapidly and accurately identify various human movements. Notably, the hydrogel can perceive its actions driven by NIR light through real-time resistance changes, realizing closed-loop monitoring and sensing feedback, which provided new insights for novel soft biomimetic actuating materials and integrated multi-functional devices.
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FOOD CHEMISTRY
·
2025
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IF 9.8
Qing Meng,Tao Wang,Siting Li,Hangyu Xie,Honghong Tian,Min Wu,Xueping Song
The dispersion form of Pickering emulsions in the film-forming emulsion dominates the structure and property of films. In this study, the dispersion of oregano essential oil (OEO) Pickering emulsion in the cellulose nanofiber (CNF) were regulated to construct the smart antibacterial packaging films. The emulsion droplets rapidly layered and uniformly aggregated at the top of the film-forming emulsion (CNF 0–0.001 wt%), showed layered form. The droplets flocculated and aggregated through the depletion flocculation of the CNF (0.005–0.1 wt%), showed depletion flocculation form. The emulsion stabilized through depletion stabilization of CNF (0.2 wt%), the droplets distributed uniformly and the particle size increased, showed depletion stabilization form. The film-forming emulsion (CNF 0.3–0.8 wt%) gelled, showed gel stabilization form. The emulsion droplets formed core-shell microcapsules in the Packaging films and the films responded the stimulation of pH to smart control OEO release, and had good barrier and mechanical properties, showing the attractive application prospect in food preservation.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Huajian Ou,Lu Chen,Qiaohui Zeng,Zhiyun Peng,Zihao Lin,Ping Qi,Konglong Feng,Jing Jing Wang
A 5-aminolevulinic acid (ALA)-grafted chitin film (O-CT/ALA film) with a photodynamic inactivation (PDI) against bacteria was previously fabricated, and its preservation efficiency and mechanisms against salmon were explored. Results showed that the PDI-mediated O-CT/ALA film exhibited sustained generation capability of ROS, which had potent antibacterial activity in vitro under blue LED irradiation. Moreover, this film significantly inactivated the native bacteria and suppressed their growth in salmon fillets during storage at 4 °C and 25 °C, extending the shelf-life by >2 days compared to commercial polyethylene film. Consequently, the O-CT/ALA film retained the textural integrity of salmon muscle, stabilized the physicochemical properties of pH value, electrical conductivity, color appearance, and reduced the level of protein and lipid oxidation. Notably, it obviously reduced the accumulation of microbial metabolites and oxidation-related volatile compounds in salmon. Therefore, the PDI-mediated film shows a valid ability in preserving the storage quality of aquatic products.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Jiani Yang,Chao Xiong,Mi Zhou,Xianglin Luo,Xikui Liu,Chong Cheng,Chao He,Xiaohui Xu
Considering the intrinsic limitations of natural enzymes, the development of efficient, cost-effective artificial enzyme alternatives has become imperative. Covalent metal-organic frameworks (CMOFs), as a new type of open framework materials with precise crystalline structures, clear metal catalytic sites, ordered pores and strong designability, can be considered as an ideal platform to develop efficient artificial enzyme materials. Here, we report two distinct enzyme-mimetic CMOFs, Tbpa-Ag3 and Tbpa-Cu3, which featured cyclic trinuclear metal clusters (Ag3/Cu3) as functional nodes respectively. Among the two CMOFs, Tbpa-Ag3 achieved precise spatial integration of photoactive Tbpa ligands with catalytic Ag3 clusters, establishing a more efficient electron transfer pathway that delivered superior oxidase-like activity under visible-light irradiation. Based on Tbpa-Ag3, we engineered a biomarker detection platform for physiological antioxidants (L-Cysteine and GSH) and a sustainable photocatalytic system for benzylamine oxidative coupling (yield > 99%, 4 h), validating Tbpa-Ag3’s dual functionality in analytical chemistry and green catalysis.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yi Yuan,Haixin Jiang,Wenhao Liu,Mengxia Duan,Jie Pang,Chunhua Wu
Antimicrobial packaging is important for preventing food spoilage and extending shelf life. Herein, antimicrobial core-shell nanofiber films were fabricated via coaxial electrospinning with pullulan/nanochitin-nisin complexes as the core and gelatin-zein as the shell. Particle size and zeta potential analyses confirmed the successful formation of nanochitin-nisin complexes. Fourier-transform infrared spectrometry (FTIR) revealed binding via electrostatic interactions and hydrogen bonding. The suitable viscosity, conductivity, and surface tension of the spinning solutions ensured good spinnability, yielding uniform nanofibers, as observed using scanning electron microscopy. FTIR and X-ray diffraction analyses indicated that hydrogen bonding stabilized the core-shell structure without altering the crystallinity of biopolymers. The resulting films exhibited enhanced thermal stability, mechanical strength, reduced water vapor permeability (by ~40 %), and improved hydrophobicity. The antibacterial activities against Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922 were comparable to those of uniaxial nanofiber films. After 15 days of refrigerated storage at 4 °C, sea bass fillets wrapped in the films showed reductions in total volatile basic nitrogen, total viable counts, and thiobarbituric acid reactive substances by approximately 50 %, 90 %, and 75 %, respectively, compared to those wrapped in uniaxial nanofiber films. These findings indicate the potential of the core-shell nanofiber films for antimicrobial food packaging applications.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Xiaoming Xu,Zhiwei Wang,Guoyan Hua,Sunxinyi Wang,Yuxuan Chen,Zepeng Zhang,Fuqiang Liu,Pengrui Jin,Huanting Wang
Nanofiltration (NF) technology is crucial in alleviating global water scarcity through desalination. Overcoming the permselectivity trade-off to improve both the permeance and rejection of polyamide (PA) nanofiltration (NF) membranes beyond the log–log upper bound remains a significant scientific challenge. Herein, we explored advanced ion-transport barriers by constructing a chitin-assisted PA NF membrane, incorporating a biomass-derived carboxylated chitin nanofiber (CO-ChNF) interlayer that simultaneously modulates the pore architecture and surface charge of the PA layer. CO-ChNFs, sustainably extracted from squid cartilage and featuring rich carboxyl and amino functionalities, effectively suppressed the diffusion kinetics of amine monomers during interfacial polymerization. The engineered CO-ChNF/PA membranes demonstrated a sharper pore size distribution and an enhanced charge density, providing an ideal platform to systematically investigate the mechanisms behind ion sieving at PA microinterfaces by exploring ion dehydration energy and electrostatic repulsion energy. Leveraging the enhanced transport barriers, the optimal CO-ChNF/PA membrane achieved impressive performances with a permeance of up to 31.4 L m–2 h–1 bar–1 and a superior Cl–/SO42– selectivity of 91.3, surpassing most commercial and reported NF membranes. This work sheds light on the regulatory mechanism of the chitin-assisted interfacial polymerization reaction and introduces an innovative approach for efficient Cl–/SO42– sieving.
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