JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 15
·6710-6726
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IF 4.5
Li Shengyu,Mao Weiye,Xia Linying,Wu Xijin,Guo Yingxue,Wang Jingwei,Huang Jie,Xiang Hai,Jin Lu,Fu Huiying,Shou Qiyang
Injectable hydrogels derived from natural extracellular matrices exhibit excellent adhesion to endothelial cells in vitro and are ideal for many biomedical applications. However, their applicability in vivo is limited by the risk of infection or immunogenicity, and the current injectables also suffer from degradation, viscosity, and drug release. In this study, a multifunctional hydrogel scaffold (COB hydrogels) was constructed by incorporating bioactive glass nanoparticles with a Schiff base crosslinking-based hydrogel composed of carboxymethyl chitosan and oxidized cellulose. The incorporation of nanoparticles not only shortened the gelation time of the COB hydrogels, but also enhanced the performance of the hydrogel in terms of function, such as drug loading capacity. The prepared hydrogels also have self-healing ability, injectability, drug loading and sustained release, antibacterial properties and biocompatibility. In addition, given their no cytotoxicity and mild inflammation in vivo, the hydrogel scaffolds will be important for tissue engineering and drug delivery applications.
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Journal of Food Measurement and Characterization
·
2023
·
IF 3.4
Gan Xiaojing,Ma Qianyun,Wang Liwen,Liu Wenhui,Chen Zhizhou,Wang Wenxiu,Wang Jie,Mu Jianlou
Pear ( Pyrus spp.) has the function of clearing heat, reducing fire and moistening the lungs. Not from concentrated (NFC) pear juice can better maintain the nutrition, aroma and taste of pear fruit, which is worth considering as a pear processing product. Fruit raw materials play a key role in the preparation of NFC juice. In order to obtain suitable varieties for NFC pear juice, this study investigated the fruit quality of 16 kinds of pear from China, and the physicochemical characteristics, sensory quality and volatile components of NFC pear juice. The results revealed that there was a great difference among the species. The weight of single fruit varies from 84.03 to 334.96 g and juice yield from 39.39 to 85.22%. For the juice, L* values from 32.74 to 45.13, a* values from − 0.72 to 3.79%, b* values from 2.01 to 11.00. Browning degree from 0.66 to 4.35. Total soluble solids from 8.26 to 12.89%, sugar contents from 1.28 to 6.64%, total acidity from 0.65 to 7.55 g/L, and apparent viscosity from 2.42 to 3.99 mPa s. Total polyphenols from 32.35 to 116.48 mg/100mL, total flavonoid content from 21.14 to 372.32 mg/100mL. The DPPH radical scavenging ability from 60.77 to 96.28%, ABTS radical scavenging ability from 7.5 to 45.60%. 70 volatile components were detected in 16 NFC pear juices, mainly including alcohols, esters and aldehydes, etc. Overall sensory score from Anli (4.45) to Williams pear (7.72). Through correlation analysis and principal component analysis, it was found that the variety of pear fruit was an important factor affecting the quality of fruit juice.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 22
·62312-62324
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IF 5.8
Guo Xiaoxin,Liu Jun,Li Dan,Cheng Hongjun,Liu Kankan,Liu Xiaoqing,Liu Tiansheng
A string of AgCl/Bi 3 TaO 7 two-component composite was synthesized by hydrothermal and deposition-precipitation process initially. The photocatalytic activities of mixed-phase AgCl/Bi 3 TaO 7 were evaluated toward the decomposition of tetracycline (TC). Among these as-prepared materials, AgCl/Bi 3 TaO 7 nanocomposites when the molar ratio of baked materials between AgCl and Bi 3 TaO 7 was 1:5 presented the optimal photocatalytic quantum efficiency for TC dissociation (86.82%) with visible-light exposure, which was 1.69 and 2.38 folders higher than that of single Bi 3 TaO 7 and AgCl, respectively. What is more, it illustrated that the photo-generated carriers were markedly isolated on account of the formation of heterojunction confirmed by EIS analysis. Meanwhile, radical trapping experiments implied that the photo-induced holes (h + ), hydroxyl radical (·OH), and superoxide radical (·O 2 − ) were the major active species. The escalated photocatalytic activity could be ascribed to the unique construction of Z-scheme AgCl/Bi 3 TaO 7 heterojunction, which could expedite charge separation and transmission, cement light absorption capability and retain the strong redox ability of photo-generated electrons and holes. Our finding suggests that AgCl/Bi 3 TaO 7 nanocomposites possess great potential for photocatalytic oxidation of residual TC in the wastewater effluents and the reported strategy can contribute to the development of novel high-performance photocatalyst.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 13
·5587-5598
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IF 4.5
Sun Shanshan,Zhang Zihao,Li Shuhan,Le Jinxun,Qian Haixia,Yin Xiaoshuang,Liu Ying,Yang Wenzhong,Chen Yun
Magnetic core–shell nanomaterial Fe 3 O 4 –SiO 2 –Cu 2 O/Cu was first successfully synthesized using an economical strategy. Using Fe 3 O 4 as a magnetic center for easy recycling and SiO 2 as the connecting layer, Cu elements were evenly and steadily distributed on the surface of the Fe 3 O 4 –SiO 2 –Cu 2 O/Cu core–shell nanostructure. The magnetic catalyst performed outstanding catalytic reduction activity for 4-nitrophenol (4-NP), and the complete catalytic reduction of 4-NP was achieved within only 5 min. What’s more, the catalyst could be well recycled, and the catalytic efficiency remained more than 90% after being reused 24 times. Graphical abstract
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 10
·4255-4266
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IF 4.4
Nie Hongqi,Yang Xu-Hao,Yang Su-Lan,Fershtat Leonid,Yan Qi-Long
The nano-sized metal oxides (MOs) as combustion catalysts have been widely employed in solid rocket propellants, but the functionality of these materials is greatly restricted owing to their agglomeration. The catalytic activity of MOs on nanoscale was found to be significantly improved by the incorporation of MOs with carbon nanomaterials, which normally act as carriers allowing for well-distribution of MOs. In this paper, the CuO and Fe 2 O 3 nanoparticles were produced by hydrothermal method and the CuO@C and Fe 2 O 3 @C nanocomposites with a uniform structure have been fabricated by an in-situ growth of corresponding MOs on the porous activated carbon (pAC). The morphology of the prepared MOs nanoparticles and resultant pAC carried ones were characterized using scanning electron microscope. It has been shown that the CuO and Fe 2 O 3 nanoparticles are tightly adhered and dispersed on the surface of pAC. Their catalytic effects on the thermal decomposition of hexogen (RDX) were analyzed using thermal analysis techniques. Results indicate that the thermal decomposition of RDX was considerably promoted in the presence of these catalysts, where the CuO@C and Fe 2 O 3 @C were found to be capable of lowering the T p for RDX by 14.8 °C and 12.4 °C, respectively. In addition, the decomposition kinetics of RDX in the presence of these catalysts have been evaluated with the DTG and DSC experimental data, and results show that the CuO@C and Fe 2 O 3 @C were able to reduce the E a of RDX decomposition by 39.8 kJ mol −1 and 50.7 kJ mol −1 , which is suggestive of an enhanced decomposition process for RDX by addition of carbon-loaded catalysts. The TG-FTIR analysis indicates that, in the presence of CuO@C and Fe 2 O 3 @C, the gaseous products are dominated by N 2 O in RDX decomposition.
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Science China-Materials
·
2023
·Vol. 66
·期 6
·2475-2482
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IF 8.1
Cai Chunqi,Chen Qingqing,Su Hongyan,Huang Pengcheng,Mao Junjie,Wu Fang-Ying
The detoxification of nerve agents, a class of extremely toxic chemical warfare agents, is urgently needed because they have remained a threat to humanity. To date, zirconium-based metal-organic frameworks (Zr-MOFs) are the most popular catalysts in this realm. However, it is still essential to develop new and efficient catalysts based on Zr-MOFs to achieve more rapid hydrolysis. Herein, we report that the single-atom catalyst (SAC) with Cu single atoms on a UiO-66-NH 2 support (Cu@UiO-66-NH 2 ) could significantly boost the degradation of the nerve agent simulant. Compared with the pristine UiO-66-NH 2 , this SAC exhibited remarkable catalytic activity with a half-life for hydrolysis of ∼2 min and better reusability in cyclic experiments. Both experimental and theoretical studies suggest that the atomically dispersed Cu species anchored to the amino groups rather than to the Zr 6 node of UiO-66-NH 2 acted as the catalytic active sites, leading to favorable binding geometries with the substrate and the product. A catalytic mechanism on the SAC different from that generally considered on the pristine Zr-MOFs was thus presented to elucidate the enhanced catalytic efficiency.
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Nano Research
·
2023
·Vol. 16
·期 5
·7810-7819
·
IF 9.9
Zheng Nan,Liu Jie,Wang Guoqing,Yao Pan,Dang Lihong,Liu Ze,Lu Jiufu,Li Wenge
Polydimethylsiloxane containing methacryloyloxy and methoxy silane groups (MAPDMS)-microcapsule-SiO 2 (MPMS) functional materials were prepared by constructing micro-nano hierarchical structures on the surface of MAPDMS matrix. Herein, MAPDMS@1,1-stilbene-modified hydrolyzed polyglycidyl methacrylate/graphene oxide/dimethyloctadecyl[3-(trimethoxysilyl) propyl]ammonium chloride (MAPDMS@PGMA m /GO/QC18) self-healing microcapsules with compact multi-shell structure were synthesized and combined with nano-SiO 2 to construct the hierarchical structures. Furthermore, ultraviolet (UV)/moisture dual curing mode was introduced into deep curing reaction and efficient self-healing reaction of the MPMS. The results show that the introduction of UV/moisture dual curing mode and micro-nano hierarchical structure gives MPMS functional materials excellent mechanical properties, antifouling properties, self-healing properties, and antibacterial properties. The shear strength and tensile strength of MPMS increase from 3.32 and 4.26 MPa of MAPDMS to 3.81 and 5.06 MPa, respectively. Its static contact angle increases from 115.9° of MAPDMS to 156.5°, and its slide angle decreases from 68.5° of MAPDMS to 7.8°, respectively. The antifouling performance of MPMS against seawater, soy sauce, juice, coffee, protein, and other contaminants is effectively improved compared with MAPDMS matrix. At the same time, the tensile strength and elongation at break of MPMS after healing reach 98.22% and 96.57% of those in original state, respectively. In addition, the antibacterial rates of MPMS against Escherichia coli and Staphylococcus aureus reach 99.85% and 100%, respectively. The MPMS prepared in this paper is expected to be widely used in marine antifouling, pipeline network, anti-icing, microfluidics, wearable devices, medical devices, electrochemical biosensors, and other fields.
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Science China-Technological Sciences
·
2023
·Vol. 66
·期 4
·1129-1140
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IF 4.6
Zhou LiPing,Li JiaWei,Yu Bing,Zhang Jun,Hu Hao,Cong HaiLin,Shen YouQing
Poly(amidoamine) (PAMAM) dendrimers are widely studied as drug vectors due to their particular structure and excellent properties. Drug molecules can be loaded in the internal cavity of dendrimers or adsorbed on the surface. In this paper, the interaction force and spatial configuration between PAMAM and several typical chemotherapy drugs (doxorubicin (DOX), paclitaxel (TAX), hydroxycamptothecin (HCPT)) is studied by molecular dynamics (MD) simulations. Several essential parameters of dendrimers as drug carriers are analyzed by combining experiments and MD simulations, including particle size, drug loading, drug release, and biocompatibility. The simulation of dendrimer@drug complexes demonstrates that many cavities are semi-open, and most drug molecules are not completely wrapped. The internal structure of PAMAM dendrimers became looser with more extended nuclei, which increased the non-covalent interactions between PAMAM dendrimers and drug molecules. The umbrella sampling simulations reveal that the change of binding energies between dendrimers and drug molecules is responsible for the variation in drug release rate. This study provides valuable enlightenment information for the drug loading/release of PAMAM dendrimers.
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Science China-Chemistry
·
2023
·Vol. 66
·期 4
·1086-1093
·
IF 9.6
Wang Linan,Tu Chenchen,Gao Hongbo,Zhou Jiazheng,Wang Hongshan,Yang Zhihua,Pan Shilie,Li Junjie
Infrared (IR) birefringent materials with large optical anisotropy and wide transparency range are important for efficient light manipulation in various IR optical devices. Herein, two new IR birefringent materials AMgGeSe 3 (A = Li, Na) with large optical anisotropy were rationally designed by a rigid octahedron and flexible dimer combined strategy and fabricated in experiment. The introduction of rigid [LiSe 6 ]/[NaSe 6 ] and [MgSe 6 ] octahedra effectively regulates the geometry and arrangement of the flexible [Ge 2 Se 6 ] dimers, resulting in the birefringence as large as 0.334@1,064 nm in LiMgGeSe 3 and 0.445@1,064 nm (the largest one in the reported [Ge 2 Se 6 ] dimer-contained selenides) in NaMgGeSe 3 . Density functional theory (DFT) calculations and statistical analyses highlight the influence of polarizability anisotropy, density, arrangement of units, as well as layer distance on birefringence. The results indicate that AMgGeSe 3 (A = Li, Na) crystals are the promising IR birefringent materials and it gives an insight into the exploration of new IR birefringent materials with large birefringence based on the clamping effect from rigid groups.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 33
·80279-80292
·
IF 5.8
Zhang Yaping,Zhang Duoxin,He Yufeng,Wang Zeyuan,Song Pengfei,Wang Rongmin
The environment and human health are in danger due to the long-term enrichment and buildup of organic pesticides, dyes, and harmful microbes in wastewater. The development of functional materials that are efficient for treating wastewater remains a significant problem. Eco-friendly hexagonal spindle-shaped Fe-MOFs (Hs-FeMOFs) were created in this study under the influence of cationic copolymer (PMSt). The mechanism of crystal growth and development of its unique morphology were described after looking into impact factors for the ideal circumstances and being characterized by XRD, TEM, XPS, and other techniques. It revealed that Hs-FeMOFs possess an enormous supply of adsorption active sites, a strong electropositivity, and the nanometer tip. Then, typical organic pollutants, such as herbicides and mixed dyes, as well as biological pollutants bacteria, were chosen to assess its efficacy in wastewater treatment. It was discovered that the pendimethalin could be quickly removed in wastewater and the removal rate reached 100% within 10 min. In separation of mixed dyes, the retention rate of malachite green (MG) reached 92.3% in 5 min and with a minimum inhibitory concentration of 0.8 mg/mL and demonstrated strong activity due to the presence of cationic copolymers. In actual water matrix, Hs-FeMOF could also play excellent adsorption and antibacterial activity. In summary, a novel, environmentally friendly MOF material with good activity was successfully created by cationic copolymer induction. It offers a fresh approach to develop functional materials in wastewater treatment.
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PubMed
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 10
·6471-6486
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IF 5.7
Zhang Jiawei,Wang Xiaojun,Huang Huicheng,Zhang Bin,Zhou Hao,Xin Yujun,Han Guangting,Zhang Yuanming
Air pollution has become a serious threat to human health; hence, it is highly desirable to develop high-efficiency air filters. In this paper, porous cellulose nanofibril (CNF)-implanted air filters with hierarchical structures consisting of LC/PET/CNF composites were prepared using pressurized filtration. The frame of the composite was made of fibrillated lyocell fibres (LC), while polyethylene terephthalate (PET) fibres acted as spacers between the fibrillated LC fibres. CNFs serving as functional fillers were implanted in the LC/PET composite to decrease pressure drop. The results showed that the overall filtration efficiency of the LC/PET composite (50%:50%) with a basis weight of 30 g/m 2 for particulate matter (PM) was only 52.69%, while the pressure drop was 56.50 Pa. However, after implantation of CNFs in the LC/PET composite with a weight concentration of only 0.5 g/m 2 , the overall filtration efficiency significantly improved to 98.22% with an acceptable pressure drop of 145.50 Pa (P 50 W 30 t 3 N 0.5 ). The study provides a new way to achieve high-efficiency fabrication of air filters with high performance for PM removal. Graphical abstract
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 27
·70884-70896
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IF 5.8
Li Ke,Zhu Yuqiu,Wang Zixuan,Chen Dingkai,Wu Wenwei,Luo Yongming,He Dedong
High concentration of H 2 S in acidic natural gas will lead to poisoning of catalysts for hydrogen production by methane steam reforming, thus limiting the further use of natural gas. Reforming CH 4 by H 2 S can be considered as an alternative route to hydrogen production from methane. This process not only achieves the removal of H 2 S but also obtains chemical raw material CS 2 and clean energy H 2 . By impregnating the Mo source on SiO 2 treated with hydrogen peroxide and then using the catalyst in the CH 4 /H 2 S reforming reaction, we surprisingly found that the conversion rate of CH 4 and H 2 S increased from 28 and 32% to 34% and 43%, respectively, after hydrogen peroxide treatment. The H 2 production rate and the yield of CS 2 increased from 20 mmolH 2 /(g Mo *min) and 52% to 30 mmolH 2 /(g Mo *min) and 65%, respectively. Combining with characterization methods such as X-ray diffraction (XRD), hydrogen temperature programmed reduction (H 2 -TPR), 1 H-based solid-state nuclear magnetic resonance ( 1 H MAS NMR), X-ray photoelectron spectroscopy (XPS), Raman spectra (RS), and transmission electron microscopy (TEM), we found that the hydroxyl concentration of the support increased after hydrogen peroxide treatment, which led to the strengthening of the force between the metal and the support, which was easy to form low-level and small-size MoS 2 , exposing more active sites, and further improving the catalytic activity. This method provides a new idea for hydrogen production by CH 4 /H 2 S reforming and the development of high-performance MoS 2 -based catalysts.
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