Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Jiang Ruiting,Yang Guang
The cost-effectiveness and renewability of biomass-derived carbon spheres have important advantages for wide application, yet efficient synthesis methods and green activation studies are still challenging. Here, hemicellulose from corncobs was extracted, and then N 2 plasma technology was used to modify the carbon spheres produced from hemicellulose in a single process. The effect of hydrothermal reaction parameters on the yield of carbon spheres was investigated, and the optimal preparation conditions were determined with solid–liquid ratio of 1:10 (g/mL), reaction time of 12 h, and pH of 1.5. The modified carbon spheres featured 3.02% nitrogen content and mesoporous structure. As an anode material for a lithium-ion battery, the modified sample has a specific capacity of 232.1 mAh g −1 after 50 cycles at 0.1 A g −1 . In this study, biomass-derived carbon spheres containing multifunctional groups were prepared under green and mild conditions, and this innovative process provides an effective basis for the sustainable utilization of biomass.
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高影响因子
JOURNAL OF FOOD SCIENCE
·
2024
·Vol. 89
·期 12
·9271-9282
·
IF 3.2
Jiayue Zhou,Dong Li,Yanqun Xu,Xiaochen Zhang,Lei Wang,Lin Zhou,Liang Zou,Zisheng Luo
( E )-2-Hexenal (E2H) is an important volatile organic compound (VOC) that can serve as a marker for fruit quality sensing and shelf-life evaluation. However, visual and portable sensors for E2H have not been reported mainly because of the difficulty in selective response to E2H while avoiding interference from other VOC, especially isomers. Herein, we developed a novel colorimetric sensor based on thiol-functionalized polydiacetylene assembly (PDA-SH/PDA) for the quantitative and selectivity of E2H. The mechanism was that E2H underwent a Michael addition reaction with sulfhydryl groups in PDA-SH/PDA. The Michael addition reaction destroyed the hydrogen bond and distorted the conjugated molecular system, resulting in colorimetric responses. Under optimal conditions, a good linear relationship was observed between E2H concentration and red colorimetric shift ( R 2 = 0.9679). The E2H sensor yields a high analytical sensitivity of 1.5203% and a limit of detection of 0.015 g L −1 . Besides, the PDA-SH/PDA sensor can be used to visually distinguish E2H and its isomer ( Z )-3-hexenal. The PDA-SH/PDA sensor yielded a statistically significant difference in red colorimetric shift ( p < 0.01) between the pairs of isomers in the ripeness of fruits. At last, the sensor was utilized for detecting E2H in grapes from different shelf lives. We found that the E2H concentration increased from 66.16 ± 1.54 to 67.56 ± 1.30 µg L −1 as storage time was prolonged. The results of this research not only demonstrated the feasibility of visual and on-site detection of E2H but also provided potential promise for portable fruit quality sensing and shelf-life evaluation.
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高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 10
·848
·
IF 4.4
Jun Wu,Gaofeng Shao,Xiaodong Wu,Sheng Cui,Xiaodong Shen
A novel Cr-doped BaTiO3aerogel was successfully synthesized using a co-gelation technique that involves two metallic alkoxides and a supercritical drying method. This freshly prepared aerogel has a high specific surface area of over 100 m2/g and exhibits improved responsiveness to the simulated sunlight spectrum. Methyl orange (MO) was chosen as the simulated pollutant, and the results reveal that the Cr-doped BaTiO3aerogel, when modified with the noble metal silver (Ag), achieves a pollutant removal rate approximately 3.2 times higher than that of the commercially available P25, reaching up to 92% within 60 min. The excellent photocatalytic performance of the Ag-modified Cr-doped BaTiO3aerogel can be primarily attributed to its extensive specific surface area and three-dimensional porous architecture. Furthermore, the incorporation of Ag nanoparticles effectively suppresses the recombination of photo-generated electrons and holes. Stability and reusability tests have confirmed the reliability of the Ag-modified Cr-doped BaTiO3aerogel. Therefore, this material emerges as a highly promising candidate for the treatment of textile wastewater.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Shengkang Zhang,Yu Xiao,Qiwei Feng,Ziqiang Lei
The oxygen evolution reaction (OER) plays a pivotal role in the hydrolysis process of zinc–air batteries. Consequently, it is essential to develop cathode catalysts with both cost-effectiveness and high oxygen evolution activity. In this study, we synthesized the FeFFIVE-1-Ni two-dimensional (2D) metal–organic framework (MOF) nanosheets via a straightforward solvothermal approach and oxidized them in an air atmosphere. During the calcination process in an air atmosphere, the heteroatoms (O, F) within the FeFFIVE-1-Ni 2D MOF nanosheets combine with iron and nickel metal ions, forming FeOF and NiF2 compounds. The synergy between these compounds and the creation of surface cracks during calcination yield catalytic active power and catalytic active sites essential for the oxygen evolution reaction. Notably, the overpotential of FeFFIVE-1-Ni 2D MOF nanosheets calcined in air under alkaline test conditions (η10 = 286 mV) was lower than that of commercial RuO2 catalysts (η10 = 355 mV). This work presents an effective strategy for replacing noble metal catalysts such as RuO2 by simply treating fluorinated metal–organic frameworks.
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JOURNAL OF CONTROLLED RELEASE
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2024
·
IF 10.5
Yingnan Zhu,Ruikang Zhang,Wenwen Gao,Fei Li,Mei Yang,Jie Feng,Yalan Ji,Jiahang Si,Xiangrong Wang,Yuze Dong
Oral insulin delivery is considered a revolutionary alternative to daily subcutaneous injections in terms of compliance and convenience. However, significant challenges remain in terms of inactivation in gastrointestinal environment and limited permeation across the intestinal epithelium. Herein, we used acid-resistant metal-organic framework (PCN-222) to load insulin and modified the exterior with sodium dodecyl sulfate (SDS) to achieve efficient oral insulin delivery. The PCN-222 nanocarrier with ordered mesoporous cage structure and suitable pore size achieved a high insulin loading of 75 %. The SDS on the surface of nanocarrier reduces its hydrophilicity while reversibly altering cell morphology and increasing epithelial cell permeability, thereby promoting intestinal epithelial absorption. The constructed particle (I@P@S) was encapsulated in sodium alginate (SA) microspheres to protect it from gastric acid degradation and releases it upon entry into the intestinal tract. Through an uptake pathway dominated by clathrin-mediated endocytosis, the released I@P@S realized efficient intestinal permeability and controlled insulin release under physiological conditions due to the phosphate sensitivity of PCN-222, leading to an in vivo bioavailability of 12.9 %. This work provides a valuable reference for the design of oral insulin delivery systems.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Lingwu Meng,Maosheng Lin,Qirui Guo,Longzhao Zhang,Xiangyu Huang,Shule Zhang,Weihua Ma
Stabilizing metal species at the atomic level and tuning their catalytic properties is a significant challenge. Herein, an N-doped Fe x O y -N-ZSM-5 catalyst with layered and chain-like graphene structures is reported. The catalyst can selectively catalyze the oxidation of triethylamine (TEA) with an efficiency of 99.7 % at 240 °C, and maintain an N 2 yield of 97.6 % over the reaction temperature range of 240–360 °C. The results indicate that the layered graphene in the catalyst provide anchor sites for active Fe, while the abundant chain-like graphene act as connectors between ZSM-5 and the layered graphene, offering ample opportunities for TEA and its intermediates to contact the catalyst surface. This increases the number of active sites on the catalyst, thereby enhancing the catalytic performance of Fe x O y -N-ZSM-5. Notably, due to the interaction between FeO x and FeN x species, Fe x O y -N-ZSM-5 exhibits excellent thermal stability and water resistance, demonstrating promising potential for practical.
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Materials Today Nano
·
2024
·
IF 8.2
Yanrong Liao,Sizhao Zhang,Zhouyuan Yang,Jing Wang,Shuai Yu,Haolin Zhang,Yunyun Xiao,Feng Ding
Polybenzoxazine (PBz) aerogels are promising high-performance, halogen-free flame-retardant thermal insulation materials in aerospace applications. But their widespread use is hindered by high costs, significant drying shrinkage, and poor machinability. Herein, we successfully addressed these challenges by developing PBz aerogel composites using a cost-effective ambient pressure drying method that reduces energy consumption and shortening the preparation cycle. This approach expands the range of available monomers, reduces the inherent rigidity of the network structure, and enhances processability. The resulting PBz aerogels demonstrate low drying shrinkage (as low as 5.68 %), lightweight properties (lowest to 0.322 g cm −3 ), excellent fire-retardant (self-extinguishing in 1.8 s), and exceptional thermal insulation performance (as low as 0.0402 W m −1 K −1 at room temperature and normal pressure). Further studies under various pressures show that at an atmospheric pressure of 10 Pa, the thermal conductivity at room temperature can reach as low as 0.027 W m −1 K −1 . Moreover, cryogenic treatment at −196 °C significantly enhances the compressive properties of PBz aerogels without inducing any noticeable shrinkage. Notably, PBz aerogels exhibit outstanding flame resistance, rated as nonflammable rating in vertical burning tests (UL-94, V-1 class), and showing a limiting oxygen index (LOI) as high as 33.7 %. Overall, these remarkable features underscore the exceptional potential of PBz aerogels as advanced thermal insulation materials in the aerospace industry.
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Xiayu Liu,Ying Shi,Donghong Liu,Qihe Chen
An exopolysaccharide (EPS)-producing bacterium, identified as Weissella cibaria based on 16S rDNA sequencing, was isolated from Chinese traditional rice wine koji. Whole-genome sequencing (WGS) revealed 2261 core genes and 3 plasmids, with 95 carbohydrate-active enzymes identified in the genome. The EPS produced by W. cibaria ZJU.1 was primarily composed of glucose, with a molecular weight of 144.5 kDa, as determined by high-performance anion-exchange chromatography (HPAEC) and high-performance gel chromatography (HPGPC). Structural analysis indicated that the EPS predominantly consists of α-(1→6) glycosidic bonds (88.32%) and α-(1→3) branches (11.68%). Microscopic examination revealed an interleaved fibrous structure at low concentrations and a lamellar structure at higher concentrations. Thermal analysis demonstrated good stability, with the carbon ring structure intact up to 264.12°C. Furthermore, the EPS exhibited excellent dispersion stability and rheological properties at higher concentrations. Activity prediction using a zebrafish model suggested potential therapeutic benefits, including alleviation of diabetes, anti-tumor, and anti-epileptic effects. This study highlights the promising food and pharmaceutical applications of W. cibaria ZJU.1 EPS.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xin Liu,Qunzhi Zhu,Wenjing Wu
Water is one of the most essential human rights, and every human being has the right to drink pure water. Approximately 2.1 billion people worldwide do not have access to safe drinking water, and with a growing population, increasing global industrialization has intensified water stress in many parts of the world. Solar-driven interfacial evaporation, as a sustainable and environmentally friendly technology, transforms external solar energy into thermal energy through a photothermal evaporator to produce fresh water. In this paper, we prepared MoS 2 -rGO aerogels (MGA) from molybdenum sulfide (MoS 2 ) and reduced graphene oxide (rGO) by one-step hydrothermal and vacuum freeze-drying methods. The prepared aerogels have vertical loose water transport channels and good mechanical properties, and the light absorption of MoS 2 -rGO aerogels in the solar spectrum (280–2500 nm) reached 86.3 %. The water evaporation rate under one solar radiation intensity condition reached 1.72 kg m −2 h −1 with a photothermal conversion efficiency of 86.5 %. What’s more, the MGA has good salt-resistant properties and cycling stability and always maintains a stable evaporation rate and evaporation efficiency in 15 evaporation cycle tests. In addition, the simplicity and low cost of our aerogel preparation process show a potential way to achieve water purification and desalination in daily life.
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ACS Nano
·
2024
·
IF 15.8
Bo Chen,Wanmeng Wang,Meilin Hu,Yunkai Liang,Ning Wang,Changyi Li,Ying Li
The dental implant market has experienced explosive growth, owing to the widespread acceptance of implants as the core of oral rehabilitation. Clinically, achieving simultaneous anti-infective effects and rapid osseointegration is a crucial but challenging task for implants. The demand for implants with long-term broad-spectrum antibacterial and immune-osteogenic properties is growing. Existing methods are limited by a lack of safety, efficiency, short-lasting anti-infective ability, and inadequate consideration of the immunomodulatory effects on osteogenesis. Herein, a ZnO/black TiO2–x heterojunction surface structure was designed as a near-infrared (NIR) light-responsive nanofilm immobilized on a titanium (Ti) implant surface. This nanofilm introduces abundant oxygen vacancies and heterojunctions, which enhance the photothermal and photoelectric abilities of Ti implants under NIR illumination by narrowing the band gap and improving interfacial charge transfer. The “photo-thermo-electric” implant exhibits excellent broad-spectrum antibacterial efficacy against three dental pathogenic bacteria (Porphyromonas gingivalis, Fusobacterium nucleatum, and Staphylococcus aureus, >99.4%) by destroying the bacterial membrane and increasing the production of intracellular reactive oxygen species. Additionally, the implant can effectively eliminate mature multispecies biofilms and kill bacteria inside the biofilms under NIR irradiation. Meanwhile, this implant can also induce the pro-regenerative transformation of macrophages and promote osteoblast proliferation and differentiation. Moreover, in vivo results confirmed the superior antibacterial and osteoimmunomodulatory properties of this dental implant. RNA sequencing revealed that the underlying osteogenic mechanisms involve activation of the Wnt/β-catenin signaling pathway and bone development. Overall, this versatile “photo-thermo-electric” platform endows implants with anti-infection and bone integration performance simultaneously, which holds great potential for dental implants.
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高影响因子
Polymers
·
2024
·Vol. 16
·期 13
·1919
·
IF 4.7
Yang Lyu,Weipeng Sun,Tingyou Feng,Wenge Li,Yong Jiang,Chenglin Zuo,Shuangxi Wang
Steel structures located in subtropical marine climates face harsh conditions such as strong sunlight and heavy rain, and they are extremely corroded. In this study, a waterborne coating with excellent corrosion resistance, hydrophobic ability, high-temperature resistance and high density was successfully prepared by using modified nanoscale titania powders and grafted polymers. The effects of three modifiers on titania nanoparticles and waterborne coatings’ properties were studied independently. The experimental results showed that the activation index of the modification employing methacryloxy silane reached 97.5%, which achieved the best modification effect at 64.4 °C for 43.3 min. The waterborne coating with nanoscale titania modified by methacryloxy silane exhibited the best hydrophobic effect, with a drop contact angle of 115.4° and excellent heat resistance of up to 317.2 °C. The application of the waterborne modified coating in steel structures under subtropical maritime climates showed that the waterborne titania coatings demonstrated excellent resistance to corrosion, high temperatures and harsh sunlight, with a maximum service life of up to five years. Economic analysis indicated that, considering a conservative three-year effective lifespan, this coating could save more than 50% in cost compared with conventional industrial coatings. Finally, the strengthening mechanism of the polymer coatings with modified nanoscale titania was analyzed.
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CARBON
·
2024
·
IF 10.5
Runze Feng,Mingnv Guo,Zhongqing Yang,Jiaqi Qiu,Ziqi Wang,Yongliang Zhao
The photothermal-catalyzed CO 2 reduction is severely limited by the low carrier transport capacity. In this paper, the in-situ construction of 0D/2D Bi 2 MoO 6 (BMO)/reduced Graphene Oxide (rGO) heterojunction was synthesized. The excellent photothermal conversion ability of rGO promotes the high dispersion of BMO quantum dots (QDs). The size of synthesized BMO QDs is about 4.26 nm and the temperature of the catalysts can quickly rise to 68.0 °C. XPS results show that the C–O–Bi interfacial electronic bridge between surface oxygen-containing groups and BMO QDs was successfully induced by modulating the degree of GO reduction. Electrons generated by BMO QDs migrate to the rGO surface rapidly, inducing rGO as a new electron-rich surface for rapid activation of CO 2 . The 1:5 BMO/rGO (NaBH 4 ) CO yield reaches 186.87 μmol/g, which is 4.64 times as much as BMO QDs.
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