CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Zongshu Xu,Ze Cheng,Qun Tang,Kangqi Huang,Heping Li,Zhiming Zou
Nowadays, there is an increasing demand for smart packaging materials capable of effectively monitoring the food freshness. In this study, new Co-based MOF (Co-BIT) microcrystals with ammonia-sensitivity and antibacterial function were constructed and then loaded within cellulose acetate (CA) matrix to create smart active packaging materials. The influences of Co-BIT loading upon structure, physical, and functional properties of the CA films were then thoroughly explored. It was observed that microcrystalline Co-BIT was uniformly integrated inside CA matrix, which caused significant promotions in mechanical strength (from 24.12 to 39.76 MPa), water barrier (from 9.32 × 10 −6 to 2.73 × 10 −6 g/m·h·Pa) and ultraviolet light protection performances of CA film. Additionally, the created CA/Co-BIT films displayed striking antibacterial efficacy (>95.0 % for both Escherichia coli and Staphylococcus aureus ), favorable ammonia-sensitivity function as well as color stability. Finally, the CA/Co-BIT films were successfully applied for indicating the spoilage of shrimp through discernible color changes. These findings suggest that Co-BIT loaded CA composite films have great potential for use as smart active packaging.
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 26
·12101-12108
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IF 3.3
Bin Li,Wenrui Hao,Jizhen Liu,Mengjing Zhou,Xiaojia Xu,Aolin Wu
Deep eutectic solvent (DES) was synthesized from choline chloride (ChCl) and acrylamide (AM), and P(AM-co-MA) hydrogels were prepared by adding different contents of maleic acid (MA) to DES by frontal polymerization. Fourier infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to characterize the hydrogels at the microscopic level, and the swelling properties, mechanical properties, self-healing properties and electrical properties of the copolymerized hydrogels were also investigated. The results showed that the equilibrium swelling of the hydrogels was significantly enhanced with the increase of pH due to the addition of MA. The hydrogel with the addition of MA has self-healing properties that pure PAM does not have. In terms of electrical conductivity, the increase of MA makes the internal structure of the hydrogel more loose, which is conducive to the passage of free ions. And there is a significant effect of different temperatures and different crosslinker contents on the electrical conductivity. In summary, we prepared a P(AM-co-MA) hydrogel that can produce significant property changes in response to changes in the external environment, which is expected to expand the application of hydrogels in flexible electronic materials.
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Cancer Nanotechnology
·
2023
·Vol. 14
·期 1
·1-21
·
IF 5.7
Wang Hongsheng,Jin Xinmeng,Gao Yinghua,He Xin,Xu Yiming,Mu Haoran,Jiang Yafei,Wang Zhuoying,Yu Chen,Zhang Tao,Hua Yingqi,Cai Zhengdong,Xu Jing,Ma Xiaojun,Sun Wei
Background Tumor angiogenesis, immunosuppression, and progression are all closely correlated with the tumor microenvironment (TME). Immune evasion is supported by both M2 phenotype tumor-associated macrophages (TAMs) and vascular aberrations in the TME. TME reprogramming is a promising therapeutic approach for treating tumors. Anti-angiogenesis has the power to control the polarization of macrophages, prevent progression, and increase drug penetration. Additionally, polyamine blocking therapy can increase CD8 + T cell infiltration and decrease immunosuppressive cells. These results led to developing a potential therapeutic regimen that targets TAMs and angiogenesis to reprogram the osteosarcoma TME. Results For the targeted biomimetic co-delivery of regorafenib and alpha-difluoromethylornithine via the mannose receptor, which is overexpressed in both TAMs and osteosarcoma cells, mannosylated poly(lactide-co-glycolide)-polyethylene glycol nanoparticles (Man-NPs) were synthesized. The superior physiological properties and intratumoral accumulation of the Man-NPs efficiently promoted TAMs polarization and inhibited angiogenesis. Macrophage repolarization further activated immune cells, which contributed to remodeling the TME. Conclusion Overall, these findings suggested that using Man-NPs as an immunotherapeutic approach to treat osteosarcoma may be promising. Graphical Abstract
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Abid Naeem,Yu Chengqun,Hetonghui,Zang Zhenzhong,Zhu Weifeng,Guan Yongmei
Gallic acid is an important phenolic compound with extensive applications in the food and pharmaceutical industries due to its health-promoting properties. However, due to its poor solubility and bioavailability, it is rapidly excreted from the body. Therefore, β-cyclodextrin/chitosan-based (polyvinyl alcohol- co -acrylic acid) interpenetrating controlled release hydrogels were developed to improve its dissolution and bioavailability. pH, polymer ratios, dynamic and equilibrium swelling, porosity, sol-gel, FTIR, XRD, TGA , DSC , SEM and structural parameters like an average molecular weight between crosslinks, solvent interaction parameters, and diffusion coefficient affecting release behavior were investigated. The highest swelling and release were observed at pH 7.4. Furthermore, hydrogels showed good antioxidant and antibacterial properties . Hydrogels improved the bioavailability of gallic acid in a pharmacokinetics study in rabbits. In vitro biodegradation showed that hydrogels were more stable in blank PBS than lysozyme and collagenase . Hydrogels were safe for rabbits (3500 mg/kg) without causing hematological or histopathological changes. The hydrogels showed good biocompatibility, and no adverse reactions were observed. Moreover, the developed hydrogels can be used to improve the bioavailability of various other drugs.
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PubMed
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 18
·e202204645
·
IF 2.1
Yingzi Huang,Xue Ye,Xinhua Gao,Lisheng Guo,Yaqiong Wang,Wenlin Xu,Jie Li
Graphical A hollow microcage structured CoMn- x catalyst was synthesized by the template method. In which abundant CO 3+ as well as surface reactive oxygen species on the surface of the CoMn-2 catalyst enabled it to exhibit extremely high catalytic activity for CO under space velocity 36,000 mL g cat −1 h −1 , being able to completely eliminate CO at 80 °C and maintain stable catalytic activity for up to 100 h. Cost-effective and highly efficient catalyst is a promising way for the removal of CO in automotive exhaust purification. Herein, a series of novel self-assembled CoMn bimetallic catalysts with hollow microcage structure have been prepared through zeolitic imidazole framework (ZIF-67) assisted method followed by direct pyrolysis in static air. Both the Mn loading and the unique hollow microcage structure play important roles in CO low-temperature oxidation, and the highest catalytic activity is obtained for CoMn-2 catalyst, which presents T 100 (temperature of 100 % CO conversion) at 80 °C. Through a systematic series of experiments, we further demonstrate that our catalysts’ superior catalytic performance arises from small particle size, high surface active oxygen content and Co 3+ /(Co 2+ +Co 3+ ) ratio. Such configuration of catalysts will pave the way for new strategies to design noble-free high-performance catalysts for CO low-temperature oxidation.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Kai Feng,Luxin Yang,Liang Chen,Qi Jing,Huan Li,Debin Li,Jiayi Liu,Jiabai Cai,Zhou Deng
Although many technologies can be applied to sewage sludge (SS) and food waste (FW) treatment, high investment and operational costs, high land occupation, and the “not-in-my-backyard” effect pose many challenges in practice. Thus, it is important to develop and utilize low-carbon or negative-carbon technologies to tackle the carbon problem. This paper proposes a method of anaerobic co-digestion of FW and SS, thermally hydrolyzed sludge (THS), or THS filtrate (THF) to enhance their methane potential. Compared to the co-digestion of SS with FW, the methane yield of the co-digestion of THS and FW was 9.7–69.7% higher, and that of the co-digestion of THF and FW was 11.1–101.1% higher. The synergistic effect was weakened with the addition of THS but enhanced with the addition of THF, potentially owing to the change in humic substances . Filtration removed most humic acids (HAs) from THS but retained fulvic acids (FAs) in THF. Moreover, THF produced 71.4% of the methane yield of THS, although only 25% of the organic matter permeated from THS to THF. This indicated that hardly biodegradable substances remained in the dewatering cake and were removed from anaerobic digestion systems. The results indicate that the co-digestion of THF and FW is an effective way to enhance methane production.
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高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Chunyan Fan,Zehao Zang,Xiang Li,Junfang Zhang,Ping Yang,Lanlan Li,Xiaofei Yu,Xiaojing Yang,Zunming Lu,Xinghua Zhang
Transition metal hydroxides have superior oxygen evolution reaction (OER) activity but poor hydrogen evolution reaction (HER) performance, which greatly limits the water splitting for hydrogen production. Herein, copper modification of sulfur doped Co(OH) 2 hybrid catalyst (Cu@S-Co(OH) 2 ) was prepared by one-step of electrodeposition method which can serve as efficient hydrogen evolution reaction catalyst. In the presence of sulfur and copper, Cu@S-Co(OH) 2 hybrid catalyst exhibits the best catalytic activity, showing ultralow overpotential of 42 mV at a current density of 10 mA cm −2 . Compared with Co(OH) 2 , the overpotential is improved by nearly 100 mV as well as enhanced stability. In addition, the active site poison experiments proved that the active center is cobalt metal. Combined with the adsorption strength of the catalyst for OH and H species, it is considered that both S and Cu can enhance the adsorption of OH for Co(OH) 2 , while S is contributed to the adsorption of H, and Cu can promote the desorption of H. This work provides a facile method and new insight to enhance the HER activity for transitional metal hydroxides via metal and non-metallic elements co-modulation.
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FUEL
·
2023
·
IF 7.4
Jinchuan Wang,Li Zhang,Jinping Weng,Juntao Wei,Deliang Xu,Bin Li,Shu Zhang,Mortaza Gholizadeh,Electo Silva Lora,Hong Zhang
The retention and transformation of nitrogen in hydrochars prepared from co-hydrothermal carbonization (Co-HTC) of fiberboard (FB) and glucose were mainly investigated in this study. This study showed that more than 90 wt% nitrogen has transferred into aqueous solution at 180–220 °C during the hydrothermal carbonization (HTC) of FB. When the HTC temperatures were higher than 220 °C, some dissolved nitrogen recombined into hydrochars due to the enhancement of nitrogen fixation reactions (Maillard reactions). The addition of glucose could significantly increase nitrogen retention rate in hydrochars, which was due to abundant oxygen-containing intermediates (5-HMF, furfural, etc.) formed in aqueous phase by the hydrothermal decomposition of glucose. Besides, the hydrochars with more microspheres formed on the surface could apparently enhance nitrogen fixation due to the increased contacting area. In Co-HTC, the temperature range of 220–280 °C favored the nitrogen retention in hydrochars. Additionally, nitrogen retention rate increased significantly with increasing residence time and mixture ratio of glucose in a certain extent. While the heterocyclic-N was the main nitrogen functional group in hydrochars and it transformed from pyridinic-N, pyrrolic-N to quaternary-N with higher HTC temperatures and longer residence times, additionally, some amine-N was clearly formed when the nitrogen returned from the aqueous phase into hydrochars.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2023
·Vol. 31
·期 11
·4990-5002
·
IF 5.3
Wang Guoqiang,Hao Xingyu,Dong Yakun,Zhang Li
Bio-based poly(butylene succinate-co-dodecylene succinate) (PBDSs) were successfully synthesized by adjusting the content of 1,12-dodecanediol (DD) using melt polycondensation method. The chemical structure, thermal behavior, crystallization properties, mechanical properties, and rheological properties were characterized. FTIR, 1 H NMR, and 13 C NMR showed the successful synthesis of polymers with the expected structure. The synthesized polymers have high number-average molecular weight (32500–64200 g/mol). The copolyesters were random copolymers. The relationship between melting temperatures and composition was basically V-shaped distribution, which is a typical characteristic of isodimorphism behavior. Thermogravimetric analysis (TGA) showed that the thermal stability of the synthesized copolyesters was good, with no significant weight loss until 320 °C. The synthesized polymers were all semi-crystalline polymers. When the amount of dodecylene succinate unit in the product is 80%, the copolyester has good mechanical properties (tensile strength: 34.5 MPa, elongation at break: 3489%) and processing properties, so it may be more suitable for making films.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Ning Chen,Shaohua Wei,Yongjun Feng,Shui Hu,Ying Tang,Wenqiang He,Yabin Zhang,Ding Cao,Zhifeng Fu
Electromagnetic absorbing materials (EMAs) are materials that irreversibly convert electromagnetic waves into another type of energy. With the development of communication technology, electromagnetic absorption materials have broad prospects in smart phones, wearable devices, and aerospace. MXenes have excellent dielectric loss properties, and the synthesis and application of MXene functional materials with magnetic properties will be one of the hotspots and focuses of future research. In this study, magnetic Co-Ti3C2Tx MXenes were prepared by molten salt etching, and Co-Ti3C2Tx/Fe2O3/polyacrylonitrile (PAN) hollow fiber composites with double-loss capability were prepared by coaxial electrospinning technology. The maximum reflection loss of the Co-Ti3C2Tx/Fe2O3/PAN hollow fiber can reach −54.62 dB at 9.86 GHz, and the effective absorption bandwidth is 6.39 GHz. The Co-Ti3C2Tx/Fe2O3/PAN hollow fibers with excellent electromagnetic absorption capability exhibit potential for efficient EMA materials due to their synergistic effect of impedance matching and magnetic/dielectric loss.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Shujie Liang,Xiaohui Zhong,Zuqi Zhong,Hong Deng,Wai-Yeung Wong
Photoconversion of CO 2 into value-added fuels has aroused widespread interest; however, this process is significantly limited by the inefficient thermodynamics and sluggish reaction dynamics in the diluted CO 2 . To circumvent these obstacles, we design a bipyridine-based polyimide polymer for anchoring single Ni site for diluted CO 2 photoreduction. The desired Ni single atomic catalysts achieve high generation activity of ∼ 2262 μmol/h with apparent quantum efficiency (A.Q.E.) of 0.20% for CO 2 -to-CO in 0.1 atm CO 2 pressure. No measurable H 2 is produced in the catalytic process, affording nearly 100% CO selectivity over water splitting. This superior activity and selectivity outperform most previous atomical catalysts. Mechanistic analyses elucidate that the highly dispersed Ni atoms act as active sites for effective CO 2 binding and activation, and stabilize the rate-determining step of intermediates for CO generation. This work discloses the relationship between catalytic properties and single atoms for efficient solar-driven diluted CO 2 reduction.
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高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Shaohui Zhang,Suying Liu,Jingwen Huang,Haikun Zhou,Xuanzhi Liu,Pengfei Tan,Haoyun Chen,Yili Liang,Jun Pan
Developing highly efficient and stable platinum-based electrocatalyst for oxygen reduction reaction (ORR) is critical to expediting commercialization of fuel cells. Herein, several PtCu alloy nanocatalysts supported on N, P co-doped carbon (PtCu/NPC) were prepared by microbial-sorption and carbonization-reduction. Among them, PtCu/NPC-700 °C exhibits excellent catalytic performance for ORR with a mass activity of 0.895 A mg Pt −1 (@0.9 V) which is 8.29 folds of commercial Pt/C. Additionally, the ECSA and MA of PtCu/NPC-700 °C only decrease by 14.2% and 18.7% respectively, while Pt/C decreases by 35.2% and 52.8% after 10,000 cycles of ADT test. Moreover, the PtCu/NPC-700 °C catalyst emanates a maximum power density of 715 mW cm −2 and only 11.1% loss of maximum power density after 10,000 ADTs in single-cell test, indicating PtCu/NPC-700 °C also manifests higher activity and durability in actual single-cell operation than Pt/C. This research provides an easy and novel strategy for developing highly active and durable Pt-based alloy catalyst.
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