Catalysts
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2025
·Vol. 15
·期 2
·126
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IF 4
Chi Zhou,Shenglong Jing,Teng Miao,Nianlai Zhou,Hang Zhang,Yi Zhang,Lin Ge,Wencheng Liu,Zixin Yang
Emerging pollutants, such asN-acetyl-para-aminophenol, pose significant challenges to environmental sustainability, and Bi2Fe2O2(BFO) nanomaterials are an emerging class of piezoelectric materials. This study presents a novel piezoelectric-driven Fenton system based on Bi2Fe4O9nanosheets for the efficient degradation of organic pollutants. BFO nanosheets with varying thicknesses were synthesized, and their piezoelectric properties were confirmed through piezoresponse force microscopy and heavy metal ion reduction experiments. The piezoelectric electrons generated within the BFO nanosheets facilitate the in situ production of hydrogen peroxide, which in turn drives the Fenton-like reaction. Furthermore, the piezoelectric electrons enhance the redox cycling of iron in the Fenton process, boosting the overall catalytic efficiency. The energy band structure of BFO nanosheets is well-suited for this process, enabling efficient hydrogen peroxide generation and promoting Fe3+reduction. The findings demonstrate that thinner BFO nanosheets exhibit superior piezoelectric activity, leading to enhanced catalytic performance. Additionally, the incorporation of gold nanodots onto BFO nanosheets further boosts their piezocatalytic efficiency, particularly in the reduction of Cr (VI). The system exhibited robust oxidative capacity, stability, and recyclability, with reactive oxygen species (ROS) verified via electron paramagnetic resonance spectroscopy. Overall, BFO nanosheets, with their optimal energy band structure, self-supplied hydrogen peroxide, and enhanced Fe3+reduction, represent a promising, sustainable solution for advanced oxidation processes in wastewater treatment and other applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Ruyin Ma,Yijie Si,Yifei Chen,Zhou Sha,Jiahao Feizheng,Daliang Guo,Chengliang Duan,Yinchao Xu,Jing Li,Xin Tong
Carbon paper (CP) is the core component of the gas diffusion layer in proton exchange membrane fuel cell (PEMFC), and the actual operation efficiency of PEMFC was greatly affected by the properties and structure of CP. However, the traditional method of modifying CP with phenol formaldehyde resin (PF) has drawbacks such as high brittleness and poor interface bonding effect. Herein, a novel method for improving the mechanical strength and pore characteristics of CP by modifying PF with nanocellulose is proposed. The results confirmed that the mechanical/electrical properties of CP were greatly changed by the diameters and carboxyl content of nanocellulose. Compared with unmodified CP, the electrical resistivity of CNF10 modified CP was decreased by 23%, and the tensile strength, flexural strength, and gas permeability were increased by 101%, 120%, and 70%, respectively. In addition, the peak power densities of CNF10 modified CP at different anode humidification temperatures (70 °C and 85 °C) were 0.49 W.cm -2 and 0.5 W.cm -2 , respectively, which were 75% and 42% higher than those of unmodified CP, and better than the previous studies (0.458 W.cm -2 ). This simple and controllable modification approach of CP will bring new ideas for developing efficient PEMFC.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Lujie Wang,Dingfeng Xu,Jinping Zhou
Constructing multifunctional conductive composite films with excellent electromagnetic interference (EMI) shielding properties, Joule heating and solar heating meet the demands of the communications industry, artificial intelligence and wearable smart devices. Furthermore, high-performance EMI shielding materials which can endure to harsh conditions have attracted significant attention of researchers. Herein, silver nanowires (AgNWs) were prepared by glycol reduction method and then combined with bamboo cellulose nanofiber (BCNF). At the same time, polyaniline (PANI) was polymerized in situ on the surface of BCNF, and a series of Janus structure BCNF-AgNWs/BCNF-PANI composite films were prepared by vacuum assisted filtration and vapor deposition. The composite film exhibited excellent electrical conductivity of 16,618 S cm −1 and EMI shielding efficiency of 103.2 dB, and could be adapted to harsh environments. Moreover, it also had good Joule heating performance (saturation temperature up to 152.0 °C at 1.5 V applied voltage) and photothermal conversion performance (saturation temperature up to 165.1 °C at 1.5 W cm −2 power density irradiation), showing fast response time and good heating stability. The Janus composite film had a good application prospect in the field of EMI shielding and dual-drive heating.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Wen-Xuan Hu,Jia-Yang Fu,Liang-Sen Liao,Ping Wang,Kexin Wang,Chang-Sen Jin,Xiuzhu Yu,Shuang-kui Du
Layer-by-layer assembly systems for functional proteins and polypeptides are gaining interest in food nutrition due to their health benefits. However, understanding the interactions between core-template materials and proteins remains challenging. This study investigated the complexation between oxidized and carboxymethylated starch nanocrystals (OSNC and CSNC) and lysozyme (LYS). Optimal complexation was achieved at pH 6 without ionic strength, and with a higher degree of modification. At LYS concentrations of 0.5 mg/mg and 0.25 mg/mg, OSNC and CSNC achieved maximum binding capacities of 0.417 mg/mg and 0.178 mg/mg, respectively. Micromorphologies showed LYS was primarily bound to the nano-lamellar surface of OSNC and CSNC. Although electrostatic interactions were predominant, hydrophobic interactions also contributed to CSNC-LYS complexation. LYS was nearly fully released (0.419 mg/mg for OSNC-LYS and 0.178 mg/mg for CSNC-LYS) with minimal impact on its structure and bioactivity. These findings provide a foundation for stabilizing proteins and polypeptides in functional foods.
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COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Liyan Yi,Tongrui Zhang,Chuanhu Lu,Longxiang Tang,Guodong Ding,Chunyan Zhong,Yuguang Zhong,Guoshen Bian,Jian Wei,Huiqing Wang,Min Nie
Bio-based polylactic acid (PLA) with degradable, environmentally friendly and bio-friendly properties has become important sustainable material. However, the inherent disadvantages of PLA, such as weak crystallization ability, poor thermal stability, and poor barrier properties, limit its application in areas such as Plastic packaging-Containers. In this paper, a simple but efficient method was established to decrease effect of inherent disadvantages of PLA and expand its application, is by pickering emulsion. Food sources bacterial cellulose blocks were oxidized and followed high-pressure homogenization to prepare nano-bacterial cellulose (TOBC) as amphiphilic emulsifier, then TOBC nanofibers coated/stabilized PLA microspheres were prepared via pickering emulsion method, that avoiding the problem of interface separation between nanocellulose and PLA. As a result, TOBC served as a heterogeneous nucleating agent to greatly improve the crystallization behavior of PLA, boosting the crystallinity of the composite from 21.8 % to 49.6 %. After hot-pressing or injection processing to a shaped material, the prepared PLA/TOBC composites exhibited the excellent combined properties with tensile strength of 66.2 MPa, flexural strength of 81.22 MPa, impact strength of 2.72 kJ/m 2 and Vicat softening temperature of 167.3 °C. Meanwhile, TOBC addition also greatly improved the oxygen barrier ability of the composite, and the oxygen transmission rate was reduced from 143.77 cm 3 /(cm 2 -24h-0.1 MPa) for PLA to 16.01 cm 3 /(cm 2 -24h-0.1 MPa) for PLA/TOBC-3. This means that PLA/TOBC composites are expected to be used as environmentally friendly Plastic packaging-containers with high barrier capacity, providing new ideas for the development of Plastic packaging products.
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CARBOHYDRATE POLYMERS
·
2012
·
IF 3.628
Jun Huang,Wan-wen Chen,Sheng Hu,Jing-Yan Gong,Hong-Wu Lai,Peng Liu,Le-he Mei,Jian-wei Mao
TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated 6-carboxy β-chitin derivatives (T-chitin) with different carboxylate content were successfully synthesized by controlling the addition level of NaClO as the primary oxidant. The structural and biochemical properties of the derivatives were investigated. The carboxylate contents of the derivatives calculated by electrical conductivity titration were 1.33, 1.68, 1.80, and 2.08 mmol/g, respectively. The yield of T-chitin with carboxylate content of 2.08 mmol/g reached 74.55%. T-chitin exhibited stronger bile acid binding capacities than that of β-chitin. The scavenging ability of T-chitin against hydroxyl radicals improved with increasing concentration, and EC 50 values were below 1.2 mg/mL. All T-chitin exhibited a strong ferrous ion chelating effect. At 8 mg/mL, the chelating effects of T-chitin with carboxylate content of 0.81 mmol/g reached 80.15%. These results showed that T-chitin had good bile acid binding capacity and antioxidant activities and it may be a potential antioxidant in vitro .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xuanxuan Huang,Rui Huang,Qian Zhang,Zhaohong Zhang,Jinlong Fan,Jintian Huang
With the gradual increase in environmental awareness and the growing demand for food safety, sustainable and environmentally friendly cellulose-based materials have become a promising alternative to petroleum-based plastics. However, in practice, packaging materials prepared from cellulose-based materials still have some unsatisfactory properties, such as monofunctionality, low transparency, and lack of UV shielding, antibacterial or antioxidant properties. Herein, a novel synthetic strategy is proposed in this paper, specifically, tannic acid (TA), a green natural extract with antibacterial and antioxidant properties, is used as a plasticizer and cross-linker, and oxidized cellulose nanocellulose (TOCN) modified with folic acid (FA) grafting is blended with TA, and cellulose-based biomass thin films with ultraviolet (UV) shielding, antibacterial, and antioxidant properties have been successfully prepared by using a simple vacuum-assisted filtration. The experimental results showed that the films could completely block ultraviolet light at wavelengths of 200–400 nm while providing 81.47 % transparency in the visible spectrum, while the introduction of TA conferred excellent antibacterial and antioxidant capabilities with antioxidant activity of up to 95 %, and also resulted in films with excellent mechanical properties. Therefore, this work provides ideas for the design and manufacture of competitive biomass green packaging materials, laying the foundation for future applications in food packaging.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Qiang Hu,Junheng Zhang,Yadi Pan,Kuan Ding,Chaoyang Xu,Jinyu Hou,Wuxing Liu,Chanchana Thanachayanont,Thipjak Na Lampang,Meiling Chen,Shu Zhang
The low dissolved oxygen (DO) concentration in groundwater is one of the key challenges limiting the efficiency of aerobic microbial remediation, leading to the development of slow-release oxygen agents such as CaO 2 . Our previous studies have demonstrated that the oxygen content in biochars plays a role in the oxygen release reaction of CaO 2 . This study aims to further investigate the relationship between the oxygen-containing functional groups on biochar surface and oxygen release performance of CaO 2 . Surface oxidation and reduction modifications were employed to regulate the oxygen-containing functional groups on bamboo biochars while minimizing alterations to its physical structure. Results showed that the oxidized and reduced biochars were similar in oxygen content (∼20–22 %) and pore structure (with specific surface area of 8–16 m 2 ·g −1 and average pore size of 10–13 nm). On the contrary, the difference in contents between C-O and O C-O functional groups reached ∼10 %, indicating the successful regulation of the oxygen-containing functional groups. The loading capacity of CaO 2 increases with the increase in C-OH groups in biochars, while the O C-O group is identified as the oxygen-containing functional group that contributes most significantly to accelerating the oxygen release of CaO 2 . The dissolution product hydrogen peroxide (H 2 O 2 ) potentially interacted with biochars to activate free radical synthesis. The yield of hydroxyl radicals (•OH) shows a positive correlation with the oxygen content in biochars, while the production of superoxide radicals (•O - 2 ) is most significantly influenced by the presence of O C-O groups. As a result, the yield of •O - 2 was 216–317 times higher than that of •OH.
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RSC Advances
·
2025
·Vol. 15
·期 13
·10144-10149
·
IF 4.6
Lang Yang,Jialei Ying,Zhenzhong Liu,Guangyu He,Linli Xu,Mingyue Liu,Xinlei Xu,Guihua Chen,Meili Guan
Although TiO2 has been widely applied in many fields, the design and preparation of one-dimensional rutile TiO2 nanomaterials for high-efficiency photocatalysis under visible light remain challenging. Herein, uniform Co-doped rutile TiO2 nanorods with selective adsorption and photocatalytic activity for methylene blue (MB) have been developed via a one-pot molten salt flux method. Compared to pure rutile TiO2 nanorods, the Co-doped rutile TiO2 nanorods exhibited an obvious core/shell structure with smaller inner crystal face spacing (d001 = 0.20 nm) and a larger rough surface (the BET specific surface area is 25 m2 g−1). Furthermore, different dyes were employed to investigate the adsorption ability of Co-doped rutile TiO2 nanorods. The density functional theory (DFT) calculations determined that both the electrostatic potential and molecular structure could influence the adsorption behavior on the photocatalyst surface. The results indicated that the Co-doped TiO2 nanorods possessed a high selective adsorption capacity for MB (134.54 mg g−1 in neutral solution). The degradation of MB using Co-doped rutile TiO2 nanorods was conducted under visible light irradiation, yielding with an apparent rate constant of 0.301 min−1 at pH = 7. The degradation mechanism was further explored through electron spin resonance (ESR) experiments, which identified the formation of superoxide anions (·O2−) and hydroxyl radicals (·OH) in the system. This study provides a new strategy for preparing novel rutile TiO2 photocatalysts for the degradation of organic dyes under visible light.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Rimei Chen,Yonghui He,Lingli Tian,Yu Meng,Zhiping Chen,Nianfang Ma,Chunfang Wang,Hui He
Implementing differentiated photothermal temperatures in the infected area of the wound and adjacent normal tissue areas can achieve photothermal antibacterial effects while protecting adjacent healthy tissues from potential overheating damage associated with photothermal therapy. Here, a specific pH-induced photothermal temperature self-enhancing cellulose hydrogel was tailored using photothermal-responsive cellulose nanocrystals modified with polyaniline and pH-responsive cellulose nanocrystals loaded with taurine as the staggered network skeletons. The hydrogel possesses exceptional in-situ adaptability and tissue adhesion characteristics, enabling it to adhere to the irregular wound bed. Interestingly, polyaniline on cellulose nanocrystals can be converted from the form of adamantane base to the form of adamantane salt under acidic conditions, exhibiting enhanced photothermal effects. Consequently, the specific acidic microenvironment (pH 5.5–6.8) of infected wounds can elevate the photothermal temperature of hydrogel to 45–48 °C, significantly higher than that (42 °C) of adjacent healthy tissue with pH values of 6.8–7.4. Similarly, taurine grafted onto cellulose nanocrystals via dynamic imine bonding gets gradually released from the hydrogel into infected wounds under specific acidic conditions, thus providing an anti-inflammatory effect. This differential temperature regulation on the infected wound achieves effective photothermal antibacterial treatment while preventing overheating damage to normal tissue.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Juan Yu,Sijie Gong,Chaoqun Xu,Liqin Jiang,Jia Liu,Bin Wu,Xiaofang Zhang,Yimin Fan,Zhiguo Wang
Nanoellulose-based mechanochromic materials represent a frontier in sustainable optics, offering a renewable platform for advanced functional materials. However, the precise manipulation of cellulose nanofibers (CNFs) into intelligent optical systems remains challenging due to their inherent variability in size and the difficulty of achieving controlled orientation. Herein, we developed a straightforward and scalable strategy to construct mechanochromic CNF hydrogels (MCNFHs) with engineerable interference colors (ranging from yellow, red, blue, green) under compressive stress by exploiting their response to acidic vapor, that is, via simple and feasible gas phase coagulation. Remarkably, MCNFHs displayed excellent solvent resistance, mechanochromic reversibility and mechanochromic sensitivity, which could achieve the switch from black to yellow, red, blue and green under only a load of 0.36 N, a stress of 1.2 KPa, and a strain of 15 %, offering a robust platform for pressure sensing or micro-strains detecting. We also demonstrated that these new MCNFHs can be smoothly applied in optical coding systems for optical encryption. This work highlighted a versatile strategy for creating high performance CNF-based mechanochromic materials, without the need for complicated pre-assembly or precise manipulation of CNF, underscoring their potential in pressure sensing, encryption, and beyond.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Sha Shi,Jihui Wang,Chunhong Xu,Jie Mao,Yaohui Bai
Carbamazepine (CBZ), a typical pharmaceutical and personal care product (PPCP), has an annual global consumption exceeding several thousand tons. Its molecular structure contains symmetrical nitrogen-containing aromatic heterocycles, which resist degradation by conventional biochemical methods, resulting in persistent aquatic pollution. Integrating photocatalytic processes with Fenton reaction provides a targeted approach for its effective elimination from aquatic systems. However, traditional photo-Fenton systems suffer from inefficient Fe 3+ /Fe 2+ redox cycling due to sluggish Fe³⁺ regeneration and rapid recombination of photogenerated charge carriers. To address these challenges, this study designed a facet-engineered BiVO 4 photocatalyst through selective deposition of FeOx nanoparticles on the electron-rich (010) facets of monoclinic BiVO 4 via hydrothermal and photodeposition methods. The optimized FeOx/BiVO 4 composite exhibited exceptional degradation performance for CBZ, achieving a rate constant of 0.317 min -1 , which is 24-fold higher than that of pristine BiVO 4 . Mechanistic investigations revealed that the selective FeOx deposition not only promoted the valence-state transition of Fe 3+ to Fe 2+ but also enhanced charge carrier separation, thereby establishing a sustainable Fe 3+ /Fe 2+ redox cycle. Electron paramagnetic resonance (EPR) analysis and radical quenching experiments further identified hydroxyl radicals (·OH) as the dominant reactive species. This work provides a paradigm for designing efficient photo-Fenton reaction systems through targeted facet engineering, offering broad implications for the remediation of PPCPs.
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