Science China-Technological Sciences
·
2023
·Vol. 66
·期 10
·2958-2967
·
IF 4.6
Ren TingTing,Huang Lu,Xie ShangZhen,Chen GuoPeng,Liu Peng,Chen LinGen
Harvesting water from the air using adsorbents and obtaining fresh water by solar-driven desorption is considered as one of the most effective ways to solve the freshwater crisis in arid and desert regions. Based on a simple and low-cost photothermal hygroscopic hydrogel, a new strategy is proposed to boost solar energy efficiency by coupling solar-driven atmospheric water harvesting technology with thermoelectric power generation technology in this paper. Photothermal hygroscopic hydrogel ink PAM-CaCl 2 is prepared by in situ polymerization using Acrylamide as monomer, Ammonium persulfate as thermal initiator and CaCl 2 as hygroscopic component. During the day, the photothermal hygroscopic hydrogel absorbs solar energy and evaporates its own internal water to obtain fresh water. Simultaneously, the residual waste heat is utilized to power the thermoelectric panel, which produces electricity based on Seebeck effect. At night, the hydrogel harvests water molecules in the air to achieve regeneration. This hybrid system can achieve a water production rate of 0.33 kg m −2 h −1 and an additional electrical energy gain of 124 mW m −2 at 1 kW m −2 solar intensity. Theoretical model of the hybrid system is developed to understand the heat flow and thermoelectric generation process. The results provide new insights into energy and freshwater replenishment options in arid or desert areas with abundant solar energy.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Peng Wei,Liu Jiaxin,Liu Xiaoqing,Wang Liqun,Yin Lichang,Tan Haotian,Hou Feng,Liang Ji
Electrocatalytic hydrogen peroxide (H 2 O 2 ) production via the two-electron oxygen reduction reaction is a promising alternative to the energy-intensive and high-pollution anthraquinone oxidation process. However, developing advanced electrocatalysts with high H 2 O 2 yield, selectivity, and durability is still challenging, because of the limited quantity and easy passivation of active sites on typical metal-containing catalysts, especially for the state-of-the-art single-atom ones. To address this, we report a graphene/mesoporous carbon composite for high-rate and high-efficiency 2e − oxygen reduction catalysis. The coordination of pyrrolic-N sites -modulates the adsorption configuration of the *OOH species to provide a kinetically favorable pathway for H 2 O 2 production. Consequently, the H 2 O 2 yield approaches 30 mol g −1 h −1 with a Faradaic efficiency of 80% and excellent durability, yielding a high H 2 O 2 concentration of 7.2 g L −1 . This strategy of manipulating the adsorption configuration of reactants with multiple non-metal active sites provides a strategy to design efficient and durable metal-free electrocatalyst for 2e − oxygen reduction.
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Journal of Ocean University of China
·
2023
·Vol. 22
·期 4
·1034-1040
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IF 1.6
Li Jiajing,Xue Changhu,Chang Yaoguang,Shen Jingjing,Zhang Yuying
Laminarinases reveal potential application in the field of food and biotechnology. In this research, a novel GH16 family laminarinase, designated as Lam16A_Wa, was cloned from the genome of marine bacterium Wenyingzhuangia aestuarii OF219 and expressed in Escherichia coli . Lam16A_Wa demonstrates a relatively low optimal reaction temperature (35°C) and a cold-adapted feature. Its optimal pH value is 6.0 and is stable in a broad pH range from 3.0 to 11.0. A glycomics strategy was employed to investigate the hydrolytic pattern of Lam16A_Wa. The enzyme was confirmed as a random endo-acting glycoside hydrolase. Its minimum substrate was laminarin pentasaccharide, and the major final products are oligosaccharides, including disaccharide to pentasaccharide. The Lam16A_Wa provides a novel and well-defined tool for the molecular tailoring of laminarin.
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Science China-Materials
·
2023
·Vol. 66
·期 10
·3799-3809
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IF 8.1
Xu He,Li Wanying,Huang Ling,Zeng Danli,Zhang Yufeng,Sun Yubao,Cheng Hansong
Exploring self-supporting polymer electrolyte membranes that exhibit both high ionic conductivity and cation transference poses a challenge for lithium metal secondary batteries. In this research, we utilized poly(4,4′-(diphenyl ether)-5,5′-bibenzimidazole) (O-PBI) and grafted it with lithium propanesulfonyl(trifluoromethyl sulfonyl)imide (PBI- g -LiPSI) through a nucleophilic substitution reaction involving sodium 3-iodopropanesulfonyl(trifluoromethyl sulfonyl)imide (NaIPSI) and pre-activated O-PBI with lithium hydride. This process was followed by a lithium-ion exchange. The excellent leaving ability of the iodine substituent in NaIPSI allowed for a grafting ratio close to 100%, resulting in the highest possible lithium content. Moreover, the strong π−π interaction among the aromatic polybenzimidazole facilitated the formation of a self-supporting polymer electrolyte membrane, even when doped with zwitterionic 1-propanesulfonyl (trifluoromethyl sulfonyl)imide-3-methylimidazolium (MeImPSI). The ionic conductivities and 7 Li nuclear magnetic resonance chemical shifts of MeImPSI-doped PBI- g -LiPSIs showed a linear increase with the doping mass fraction of zwitterion. This finding confirmed that the zwitterion can act as a dipole, reducing the electrostatic attraction between the lithium cation and immobilized bis(sulfonyl)imide anion. Among different doping ratios, a 25-wt% MeImPSI-doped PBI- g -LiPSI exhibited the highest ionic conductivity of 0.68 mS cm −1 at room temperature, along with a lithium transference number of 0.95. To assess the performance of the electrolyte as well as separator, a lithium symmetric cell was assembed using the 25-wt% MeImPSI-doped PBI- g -LiPSI. The cell exhibited stable performance during galvanostatic cycling at ±0.5 mA cm −2 with a charge-discharge capacity of 2 mA h cm −2 , for an impressive duration of 2100 h. Additionally, we successfully demonstrated the application of single-ion conducting lithium metal secondary batteries. The film-forming property of PBI, combined with the enhanced ionic mobility provided by the zwitterion contributed to the overall excellent performance of the single-ion conducting polymer electrolyte system.
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Scientific Reports
·
2023
·Vol. 13
·期 1
·1-13
·
IF 4.6
Li Shaocong,He Qi,Chen Baihao,Zeng Jiaxu,Dou Xiangyun,Pan Zhaofeng,Xiao Jiacong,Li Miao,Wang Fanchen,Chen Chuyi,Lin Yuewei,Wang Xintian,Wang Haibin,Chen Jianfa
Iron homeostasis plays an essential role in joint health, while iron overload can cause damage and death of cartilage cells. Cardamonin (CAR) is a substance found in the fruit of the chasteberry plant and has anti-inflammatory and anti-tumor activities. We first administered iron dextran (500 mg/kg) intraperitoneally to establish an iron overload mouse model and surgically induced osteoarthritis. The extent of OA and iron deposition were assessed using Micro-ct, Safranin-O/fast green staining, H&E staining, and Prussian Blue 10 weeks later. We administered primary chondrocytes with Ferric Ammonium Citrate (FAC) to evaluate the chondrocyte changes. Chondrocytes were identified in vitro by toluidine blue staining, and chondrocyte viability was evaluated by CCK-8. The rate of apoptosis was determined by Annexin V-FITC/PI assay. The mechanism of action of CAR was verified by adding the SIRT1 inhibitor EX527, and the expression of SIRT1 and MAPK signaling pathways was detected by Western blot. Iron overload also promoted chondrocyte apoptosis, a process that was reversed by CAR. In addition, CAR reduced NLRP3 inflammasome production via the SIRT1-MAPK pathway, and the SIRT1 inhibitor EX527 inhibited the treatment of OA by CAR.CAR inhibited cartilage degeneration induced by iron overload both in vivo and in vitro. Besides, our study showed that iron overload not only inhibited type II collagen expression but also induced MMP expression by catalyzing the generation of NLRP3 inflammasome. Our results suggest that CAR can treat KOA by promoting SIRT1 expression and inhibiting p38MAPK pathway expression to reduce the production of NLRP3 inflammasome vesicles.
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CELLULOSE
·
2023
·Vol. 30
·期 14
·9113-9126
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IF 5.7
Gao Chao,Li Xinping,Song Changyong,Wei Guijuan,Zhao Xixia,Wang Shoujuan,Kong Fangong
Polyimide (PI)-based gel polymer electrolytes (GPEs) have been regarded as a hopeful alternative to liquid electrolytes to build safer lithium metal batteries due to their high thermal stability, chemical resistance, insulation properties, and self-extinguishing abilities. However, limited electrolyte affinity and low mechanical strength hindered their application in quasi-solid lithium metal batteries. In this work, a novel composite GPE matrix consisting of highly thermo-stable PI and eco-friendly cellulose acetate propionate (CAP) nanofibers was successfully fabricated by electrospinning. CAP was introduced for the first time to improve the electrolyte wettability by providing polar functional groups and to offer favorable thermal/mechanical properties via hydrogen bonding with the rigid PI chains. As a result, the obtained PI-CAP composite matrix showed ultra-flexibility, high mechanical strength (7.1 MPa), and excellent thermal stability (over 200 °C). The PI-CAP GPE exhibited high ionic conductivity (2.09 × 10 –3 S cm −1 ) and Li + transference number (0.89). The assembled LiFePO 4 /PI-CAP GPE/Li cell displayed a high capacity retention up to 95% after 300 cycles at 1 C and showed better rate capability than the LiFePO 4 /PI GPE/Li cell. The positive effects of CAP on inhibiting lithium dendrite growth and promoting the generation of stable SEI were also confirmed through SEM results of cycled lithium metals. The results indicate that the PI-CAP GPE has a good potential as a cellulose-based quasi-solid electrolyte for lithium metal batteries.
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FISH PHYSIOLOGY AND BIOCHEMISTRY
·
2023
·
IF 2.9
Pan En-Zhuang,Xin Yue,Li Xue-Qing,Wu Xin-Yu,Tan Xue-Lian,Dong Jing-Quan
The aim of this study was to investigate the splenic tissue damage of environmental biological drug avermectin to freshwater cultured carp and to evaluate the effect of silybin on the splenic tissue damage of carp induced by avermectin. A total of 60 carp were divided into 4 groups with 15 carp in each group, including the control group fed with basic diet, experimental group fed with basal diet and exposed to avermectin (avermectin group), experimental group fed with basal diet supplement silybin (silybin group), and experimental group fed with basal diet supplement silybin and exposed to avermectin (silybin + avermectin group). The whole test period lasted for 30 days, and spleen tissue was collected for analysis. In this study, H&E staining, mitochondrial purification and membrane potential detection, ATP detection, DHE staining, biochemical tests, qPCR, immunohistochemistry, and apoptosis staining were used to evaluate the biological processes of spleen tissue injury, mitochondrial function, oxidative stress, apoptosis, and endoplasmic reticulum stress. The results show that silybin protected carp splenic tissue damage caused by chronic avermectin exposure, decreased mitochondrial membrane potential, decreased ATP content, ROS accumulation, oxidative stress, apoptosis, and endoplasmic reticulum stress. Silybin may ameliorate the splenic tissue damage of cultured freshwater carp caused by environmental biopesticide avermectin by alleviating mitochondrial dysfunction and inhibiting PERK-ATF4-CHOP-driven mitochondrial apoptosis. Adding silybin into the diet becomes a feasible strategy to resist the pollution of avermectin and provides a theoretical basis for creating a good living environment for freshwater carp. Graphical Abstract
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Nano Research
·
2023
·Vol. 16
·期 8
·10881-10889
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IF 9.9
Wei Xueer,Cheng Jiawei,Li Yubing,Cheng Kang,Sun Fanfei,Zhang Qinghong,Wang Ye
The noble metal-based bimetallic clusters with high atom utilization and surface energy have been widely applied in heterogeneous catalysis, but the stabilization of these metastable clusters in harsh reaction conditions is quite challenging. Herein, we synthesize a series of Pt-, Pd-, and Ru-based clusters promoted by a second non-noble metal (Zn, Cu, Sn, and Fe), which are confined inside silicalite-1 (pure silica, S-1) crystals by a ligand-protected method. The second metal could well stabilize and disperse the noble atoms inside the rigid S-1 zeolites via Si-O-M bonds, thus enabling to lower the usage of expensive noble metals in catalysts. The as-synthesized bimetallic catalysts exhibited excellent performance in non-oxidative propane dehydrogenation (PDH) reaction, which is typically operated above 500 °C. The PtZn@S-1, PtCu@S-1, and PtSn@S-1 with only a ∼ 0.17 wt.% Pt loading offer a significant enhancement in PDH performance compared with the conventional PtSn/Al 2 O 3 catalyst with a 0.5 wt.% Pt loading prepared by impregnation method. Notably, the PtSn@S-1 provides a propane conversion of 45% with a 99% propylene selectivity at 550 °C, close to the thermodynamic equilibrium. Furthermore, the PtSn@S-1 exhibits excellent stability during 300 h on stream and high tolerance to regeneration by a simple calcination step.
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CHINESE JOURNAL OF POLYMER SCIENCE
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2023
·Vol. 41
·期 10
·1563-1576
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IF 4.3
Zhang Jie,Ye Fan,Huo Jin-Lei,Peng Jian-Wen,Hu Rong-Rong,Tang Ben Zhong
Multicomponent polymerizations (MCPs) are powerful tools to synthesize functional polymers with great structural diversity, low cost and high efficiency, which usually generate single polymer product. Herein, a robust one-pot diamines, CS 2 and monoisocyanide-participated catalyst-free polymerization was developed at room temperature to produce polythiourea and thioformamide simultaneously in equal equivalent, which was featured with cheap monomers, simple operation and mild condition, affording various polythioureas with high M w s of up to 47500 g/mol in high yields of up to 98%. Polythioureas with varied chain composition and sequence-controlled structure could be synthesized in 62 g-scale from copolymerization or multicomponent tandem polymerization, enabling facile tuning of thermal property, crystallinity, mechanical property, and fluorescence. The abundant irregular hydrogen bonds endowed the polythioureas excellent glassy state self-healing property at room temperature or below 0 °C. This polymerization provided an efficient and economic approach to access functional polythioureas.
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Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 6
·2031-2044
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IF 2.3
LV Xiaojing,Wang Jinwei,Guo Yong,Guo Yanxin
Phosphorus-containing liquid epoxidate polybutadiene (PDCP-LEPB) is synthesized and used as a reactive additive to improve the water, wear and fire resistance of UV-curable acrylate coatings containing nano-SiO 2 as a filler. The structure of PDCP-LEPB and the curing condition are confirmed by Fourier transform infrared spectroscopy (FTIR). The addition of PDCP-LEPB should be controlled at around 10% as shown by thermal stability measurements; with the addition of PDCP-LEPB, composites show earlier degradation to release flame-retardant components, and thus the fire resistance of plywood is improved when its surface is applied by the composite coatings containing PDCP-LEPB. Besides, the fire protecting ability can be greatly enhanced with SiO 2 addition due to the synergistic effect of P, Si and Cl coexistence in the matrix. The addition of PDCP-LEPB improves the water resistance of plywood as reflected by the water absorption rates, contact angle measurements and stain resistance test due to the hydrophobic nature of olefin backbone and increment of crosslinking density; the addition of nano-SiO 2 has a much more positive effect on the improvement in their stain resistance and wear resistance due to the increase in surface roughness and stiffness, respectively.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 8
·1-9
·
IF 5.7
Yang Chunlei,Xu Guiju,Hou Chenghao,Peng Lizeng,Wang Weiting,Zhang Hongwei,Zhang Xiaoling
A fluorometric and colorimetric dual-modal nanoprobe (denoted as Fe 2+ -Phen/SiNPs) has been developed for selective and sensitive determination of nitrite (NO 2 − ). The mechanism is based on fluorescence quenching between silicon nanoparticles (SiNPs) and Fe(II)-phenanthroline complex (Fe 2+ -Phen) via inner filter effect and redox. With the addition of increasing NO 2 − , Fe 2+ is oxidized to Fe 3+ , recovering the fluorescence of SiNPs. Meanwhile, the color of the system gradually changes from orange-red to colorless, which enables colorimetric measurement. The NO 2 − concentration shows a wide linear relationship with fluorescence intensity from 0.1 to 1.0 mM ( R 2 = 0.9955) with a detection limit of 2.4 μM in the fluorometric method (excitation wavelength: 380 nm). By contrast, the linear range of the colorimetric method ranges from 0.01 to 0.35 mM ( R 2 = 0.9953) with a limit of detection of 6.8 μM (proposed selective absorbance: 510 nm). The probe has been successfully applied to nitrite determination in water, salted vegetables, and hams demonstrating broad application prospects for the determination of nitrite in complicated matrices. Graphical Abstract
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-13
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IF 10.2
Zhang Yue,Pan Deng,Ning Zhenqiang,Huang Fang,Wei Yiting,Zhang Mingming,Zhang Yuanjian,Wang Li-xin,Shen Yanfei
Tumor cell-released LC3 + extracellular vesicles (LC3 + EVs) participate in immunosuppression during autophagy and contribute to the occurrence and development of breast cancer. In view of the strong association between the LC3 + EVs and breast cancer, developing an effective strategy for the quantitative detection of LC3 + EVs levels with high sensitivity to identify LC3 + EVs as new biomarkers for accurate diagnosis of breast cancer is crucial, but yet not been reported. Herein, an ultrasensitive electrochemical immunosensor is presented for the quantitative determination of LC3 + EVs using a three-dimensional graphene oxide hydrogel-methylene blue composite as a redox probe, showing a low detection limit and a wide linear range. With this immunosensor, the expression levels of LC3 + EVs in various practical sample groups including different cancer cell lines, the peripheral blood of tumor-bearing mice before and after immunotherapy, and the peripheral blood from breast cancer patients with different subtypes and stages were clearly distinguished. This study demonstrated that LC3 + EVs were superior as biomarkers for the accurate diagnosis of breast cancer compared to traditional biomarkers, particularly for cancer subtype discrimination. This work would provide a new noninvasive detection tool for the early diagnosis and prognosis assessment of breast cancer in clinics.
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