BRAZILIAN JOURNAL OF MICROBIOLOGY
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2022
·Vol. 53
·期 2
·547-556
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IF 2.214
Sun Xiaodong,Kong Xiangxiang,Li Chunxia,Wang Minjia,Yi Jialin,Deng Zhirui,Niu Bing,Chen Qin
Previous studies have shown that the combination disinfectant, Ortho -phthalaldehyde and benzyldimethyldodecylammonium chloride (ODB), can effectively kill a variety of microorganisms, such as Escherichia coli , Staphylococcus aureus , and Candida albicans . To observe the sporicidal ability and mechanism of ODB for spores, Bacillus subtilis spores were used as the research object in this experiment. TEM images revealed that ODB destroyed the integrity of the coat, cortex, and inner membrane of the spores after 0.5-h treatment, and the nuclear material was also broken and exuded after 4-h treatment. The broken structure led to the release of dipicolinic acid (DPA) in large amount. The results show that B. subtilis spores can be effetely killed by ODB through destroying the structure of the spores.
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Science China-Technological Sciences
·
2022
·Vol. 65
·期 4
·882-892
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IF 3.903
Wang XueZi,Yu Wei,Wang LingLing,Xie HuaQing
Latent heat storage of phase change materials (PCMs) is expected to be a suitable method to enhance the absorption and conversion of solar energy because of their high heat storage density and excellent chemical stability. However, pure organic PCMs are limited by their low thermal conductivity, photothermal conversion, and thermal energy storage efficiency in practical applications. Herein, vertically oriented network composite PCMs are synthesized using reduced graphene oxide/MXene hybrid aerogels (rGO/MXene) as carrier materials and encapsulating stearic acid (SA) as the PCM. Because of the vertically aligned MXene and rGO hybridized backbones, the thermal conductivity of the composite reaches 1.21 W/(mK), which increases 317.24%, compared to SA. The melting enthalpy of composites reaches 168.25 J/g, which almost retains the melting enthalpy of pure SA. The addition of rGO and MXene significantly improves the photothermal conversion capability of composite PCMs (≤90.19%). Irradiating the oriented and non-oriented surfaces of the composite sample, it is found that the temperature rise is faster in the orientation direction than in the non-oriented direction, and the equilibrium temperature of the orientation direction is 4.8°C higher than that of the non-orientation direction. This new material has a high potential for use in solar energy storage applications because of its excellent performance.
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Biochar
·
2022
·Vol. 4
·期 1
·1-14
·
IF 11.452
Zeng Xue-Yu,Wang Yu,Li Rong-Xin,Cao Hai-Lei,Li Ya-Feng,Lü Jian
The textural properties and surface chemistry of phosphoric acid-modified biochars (PABCs) prepared at different pyrolysis temperatures (500–700 °C) were studied based on the results obtained from XRD, SEM, BET, FT-IR, Raman, XPS and elements analyses. PABCs prepared at higher temperatures tended to possess a bigger proportion of microporous structure. The adsorption capacity and initial rate of PABCs for sulfadiazine (SDZ) were notably improved to 139.2 mg/g and 9.66 mg/(g min) as calculated from the Langmuir model. The adsorption equilibrium time was only one quarter of that without modification. The H 3 PO 4 modification was advantageous to produce phosphate and break functional groups to form disordered carbon structure abundant of micropores. The enhancement in the adsorption of SDZ was due to the confinement effect of hydrophobic cavities from the mircoporous structure and the π–π electron–donor–acceptor interaction. Specially, PABCs exhibited stable adsorption capacities at a wide pH range (3.0–9.0) or relatively high concentrations of coexisting ions.
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JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-15
·
IF 9.429
Huang Xiuyu,Qiu Miaojuan,Wang Tianqi,Li Binbin,Zhang Shiqiang,Zhang Tianzhi,Liu Peng,Wang Qiang,Qian Zhi Rong,Zhu Chengming,Wu Meiying,Zhao Jing
Background Ovarian cancer is the most lethal gynecological cancer which is characterized by extensive peritoneal implantation metastasis and malignant ascites. Despite advances in diagnosis and treatment in recent years, the five-year survival rate is only 25–30%. Therefore, developing multifunctional nanomedicine with abilities of promoting apoptosis and inhibiting migration on tumor cells would be a promising strategy to improve the antitumor effect.Methods and resultsIn this study, we developed a novel ACaT nanomedicine composed of alendronate, calcium ions and cyclin-dependent kinase 7 (CDK7) inhibitor THZ1. With the average size of 164 nm and zeta potential of 12.4 mV, the spherical ACaT nanoparticles were selectively internalized by tumor cells and effectively accumulated in the tumor site. Results of RNA-sequencing and in vitro experiments showed that ACaT promoted tumor cell apoptosis and inhibited tumor cell migration by arresting the cell cycle, increasing ROS and affecting calcium homeostasis. Weekly intraperitoneally administered of ACaT for 8 cycles significantly inhibited the growth of tumor and prolonged the survival of intraperitoneal xenograft mice.Conclusion In summary, this study presents a new self-assembly nanomedicine with favorable tumor targeting, antitumor activity and good biocompatibility, providing a novel therapeutic strategy for advanced ovarian cancer.Graphical Abstract
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Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Shang Xian-chao,Zhang Yu-qin,Zheng Yan-fen,Li Yiqiang
Polyphenols and flavonoids are abundant in spent onion skins (SOSs), being present in amounts are 2–sixfold greater times of than those in the inner bulb. In this study, an eco-friendly and efficient extraction method based on temperature-responsive deep eutectic solvents (TRDESs) was used to obtain natural flavonoids from SOSs. Microwave-assisted extraction yields of quercetin, kaempferol, luteolin, and quercetin-3-O-β-D-glucoside were evaluated to determine the efficiencies of a series of TRDESs. An extraction system composed of ethanolamine and m -cresol at ratio of 1:1 (20% water in TRDES system) was found to possess the highest efficiency. The extraction conditions were screened and optimized for efficiency using a Box-Behnken design. As a result, an extraction power of 554 W, extraction temperature of 76 °C, extraction time of 16 min, and solid–liquid ratio of 14 mg/mL were determined to be the optimal conditions. Under these extraction conditions, the total flavonoid extraction yields reached 47.83 ± 0.21 mg/g. The macroporous resin HPD 600 was selected for the separation and recovery of the TRDESs extraction mixture and the experimental measurements revealed that it allowed recovery rate more than 90%. In vitro activity testing of the flavonoid extract demonstrated excellent FRAP assay, DPPH assay and ABTS assay results for the SOSs extract prepared using a TRDES, and its inhibitory effects on S. aureus , E. carotovora , and B. subtilis were marked.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-12
·
IF 17.694
Ou Xing,Liu Tongchao,Zhong Wentao,Fan Xinming,Guo Xueyi,Huang Xiaojing,Cao Liang,Hu Junhua,Zhang Bao,Chu Yong S.,Hu Guorong,Lin Zhang,Dahbi Mouad,Alami Jones,Amine Khalil,Yang Chenghao,Lu Jun
High-capacity Ni-rich layered oxides are promising cathode materials for secondary lithium-based battery systems. However, their structural instability detrimentally affects the battery performance during cell cycling. Here, we report an Al/Zr co-doped single-crystalline LiNi 0.88 Co 0.09 Mn 0.03 O 2 (SNCM) cathode material to circumvent the instability issue. We found that soluble Al ions are adequately incorporated in the SNCM lattice while the less soluble Zr ions are prone to aggregate in the outer SNCM surface layer. The synergistic effect of Al/Zr co-doping in SNCM lattice improve the Li-ion mobility, relief the internal strain, and suppress the Li/Ni cation mixing upon cycling at high cut-off voltage. These features improve the cathode rate capability and structural stabilization during prolonged cell cycling. In particular, the Zr-rich surface enables the formation of stable cathode-electrolyte interphase, which prevent SNCM from unwanted reactions with the non-aqueous fluorinated liquid electrolyte solution and avoid Ni dissolution. To prove the practical application of the Al/Zr co-doped SNCM, we assembled a 10.8 Ah pouch cell (using a 100 μm thick Li metal anode) capable of delivering initial specific energy of 504.5 Wh kg −1 at 0.1 C and 25 °C.
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CELLULOSE
·
2022
·Vol. 29
·期 8
·4427-4438
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IF 6.123
Li Fangchao,Miao Gan,Gao Zhongshuai,Xu Ting,Zhu Xiaotao,Miao Xiao,Song Yuanming,Ren Guina,Li Xiangming
The development of a versatile platform that can separate oil/water mixture, remove dye from water, and purify wastewater is extremely desirable, yet still hard to realize. Herein, to address this challenge, a composite hydrogel was produced by freezing–thawing treatment using chitosan, polyvinyl alcohol, and carbon black as the raw materials. The obtained hydrogel displayed both slippery oil-repellency and water-affinity in air, underwater, when submerged in oil, and exploiting this special wettability, the hydrogel coated mesh can be used to separate oil/water mixtures efficiently. After 25 oil–water separation cycles, the hydrogel-coated filter still had a separation efficiency of over 98%. With its superhydrophilicity and active functional groups, the resulting hydrogel was able to absorb dye molecules dissolved in water effectively. Due to the photothermal effect of carbon black, the local temperature of the hydrogel was increasing quickly under sunlight illustration, which allowed it to be an advanced platform for daily wastewater purification through solar distillation. Graphical abstract A versatile hydrogel platform for oil–water separation, dye adsorption, and domestic wastewater purification was developed.
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WOOD SCIENCE AND TECHNOLOGY
·
2022
·Vol. 56
·期 3
·691-702
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IF 2.898
Wang Zhongguo,Zhang Xiong-Fei,Ding Meili,Yao Jianfeng
Wood sponges obtained by structure-retaining delignification of natural wood sheets are promising for CO 2 storage. Herein, lignin in balsa wood is selectively removed through chemical treatment, leading to a highly porous structure. To boost the CO 2 adsorption capacity, amine agents are grafted on the delignified wood via a condensation reaction. The resulting amine-grafted wood sponges exhibit hierarchical porosity and are mechanically resilient. A relatively high CO 2 uptake of 1.22 mmol g −1 (25 °C, 1 bar) is achieved due to the physisorption of hierarchical pores and chemisorption of high amine group loading. Such amine-grafted wood sponges fabricated from top-down strategy hold great potential to serve as renewable CO 2 capture materials.
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JOURNAL OF SOLUTION CHEMISTRY
·
2022
·Vol. 51
·期 7
·752-767
·
IF 2
Li Dan,Pang Yan,Wang Jingying,Sun Danlin,Zhang Xuena,Yue Danwei,Hao Longxia
Three C8 alkanes ( n -octane, iso -octane and ethyl cyclohexane) as additives were blended with methyl laurate to prepare binary systems of fuel blends for density, viscosity and refractive index measurement. The excess properties of volumes and viscosity of the three binary systems (methyl laurate + n -octane), (methyl laurate + iso -octane) and (methyl laurate + ethyl cyclohexane) were obtained and compared, which were also fitted to Redlich–Kister equation. The correlated values from Redlich–Kister equation are in good agreement with those from experimental data. The results can be used for the research of the mixture behaviors and development of biodiesel-diesel fuel blends.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 39
·期 7
·1744-1752
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IF 3.146
Li Feifei,Dong Jiale,Wang Mingyue,Lin Xingtao,Cai Weijie,Liu Xianyun
This work is mainly concerned with the synthesis of Co-Zn nanocomposites by employing MCM-41 silica as hard template (CoZnO-HT) and its catalytic behavior toward to CO 2 reforming with ethanol. The physicochemical features of the as-prepared catalysts were probed through various characterization techniques, including XRD, TEM, BET, H 2 -TPR, and XPS. Indeed, CoZnO-HT catalyst possessed a highly ordered mesostructure with similarity to MCM-41 template and a higher specific surface area (304 m 2 /g) compared to the reference CoZnO-C sample (4.75 m 2 /g) prepared by the conventional impregnation method. Consequently, CoZnO-HT exhibited good performance at low temperature, and full ethanol conversion could be achieved at 550 °C as well as the negligible formation of byproduct acetone. In addition, this catalyst depicted good stability and no obvious deactivation was observed after 40 h time on stream tests under the stoichiometric feed ratio. Indeed, superior specific surface area and efficient mass transport within the mesopores might be critical factors assigned to better activity and stability for CoZnO-HT.
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Journal of Inorganic and Organometallic Polymers and Materials
·
2022
·Vol. 32
·期 8
·3030-3039
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IF 3.518
Yuan Xianggen,Wei Zongwu,Zhang Zhenkun,Liu Haiyan
Coating nanoparticles with metal–organic frameworks (MOFs) can lead to core–shell hybrid particles with synergetic functionalities of the respective components. Previous efforts have been dedicated to achieving homogeneous and smooth MOF coatings with featureless morphologies. Herein, using halloysite nanotubes (HNTs) coated with polydopamine (PDA) to confine nucleation and growth of ZIF-8 on the surface, we prepared rod-like core–shell HNT@PDA@ZIF-8 particles. The ZIF-8 coating has a hierarchical morphology consisting of nanoaggregates of densely packed and fused ZIF-8 nanoparticles. This was achieved by simply controlling the concentration of the MOF precursors. These hybrid MOF particles combine the classical large microporosities with meso- and macroporosities derived from such hierarchical structures, while has enhanced mechanical stability. HNT@PDA@ZIF-8 exhibits appreciated adsorption capacity for several organic contaminants in aqueous system, especially for Rhodamine B.
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RARE METALS
·
2022
·Vol. 41
·期 8
·2745-2758
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IF 6.318
Li Pu-Bo,Wang Yong-Xun,Shao Ze-Xi,Wu Bin-Tao,Li Heng,Gao Mang-Mang,Liu Kuan-Guan,Shi Ke-Ren
The Mg–Al layered double hydroxide (LDH) conversion coatings were first synthesized in situ to modify the AZ91D alloy through urea hydrolysis to adjust the pH values (9.4, 10.4, 11.2 and 11.4). The pH 11.2 Mg–Al LDH possessed the best compactness and good crystallinity compared to other in situ LDH coatings and obtained the lowest corrosion current density ( i corr ) of (2.884 × 10 −6 ± 0.345 × 10 −6 ) A·cm −2 , which was attributed to the anion-exchange reaction of LDH and the physical barrier against corrosion owing to the twisted penetration pathway of the interlaced LDH sheets. Core–shell structured Zn–Al LDH@ZIF-8 powder modified with stearic acid (SA) was further wrapped with polyvinylidene fluoride (PVDF) to prepare a hydrophobic double-layered coating on the underlying pH 11.2 Mg–Al LDH (SLLZ). The water contact angle (CA) of the SLLZ coating reached 105.6°, and its i corr decreased to (3.524 × 10 −7 ± 0.214 × 10 −7 ) A·cm −2 compared with a single pH 11.2 film. The SLLZ coating exhibited high durability and corrosion protection, even after 15 days of immersion in NaCl solution. The PVDF, SA and ZIF-8 nano-shells contributed to good hydrophobicity, effectively forming a physical barrier. The Zn–Al LDH core and underlying in situ Mg–Al LDH were beneficial for synergistically promoting anion-exchange reaction between the intercalated anions of LDH and chlorides in corrosive media. This work provides a promising approach that combines core–shell LDH@ZIF-8 with LDH film on a Mg alloy surface to construct a hydrophobic film with excellent long-term anti-corrosion performance. Graphical abstract
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