JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 30
·期 10
·4287-4303
·
IF 4.705
Shi Liang,Liu Wenwu,Zhang Xiaomei,Hu Jingsong
In this study, an environmentally friendly lignin-based hybrid hydrogel (LS/OMMT) was prepared by grafting of acrylamide (AM) and acrylic acid (AA) onto calcium lignosulfonate (LS) and homogeneously distributing organic montmorillonite (OMMT) using an ultrasonic technique. FT-IR, XRD, TGA, SEM, EDS, BET, and XPS were used to characterize the physicochemical and structural properties of LS/OMMT. Then, LS/OMMT was applied to remove methylene blue (MB) from an aqueous solution and a systematic study of pH, contact time and initial MB concentration was carried out. The MB adsorption capacity on LS/OMMT was up to 492.7 mg g −1 at 313.15 K and pH 7.0. The Langmuir model well described the MB adsorption on LS/OMMT and the calculated thermodynamic parameters, such as ΔG°, ΔH°, and ΔS°, suggested that MB adsorption on LS/OMMT was spontaneous and endothermic. LS/OMMT adsorption of MB followed a pseudo-second-order kinetic model. Electrostatic attraction and hydrogen-bonding interaction were the mechanisms of adsorption. As a result, this study illustrates that LS/OMMT is an environmentally friendly and efficient adsorbent for wastewater treatment applications.
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Cancer Nanotechnology
·
2022
·Vol. 13
·期 1
·1-13
·
IF 7.917
Liu Bei,Liu Xiaoning,Zhang Xiangyu,Wu Xi,Li Chuanbo,Sun Zhaogang,Chu Hongqian
Background Despite the increasing interest in combination therapy for the treatment of cancer, controlled delivery of different therapeutics with high body-clearance efficacy and cancer cell specificity remained a great challenge. In this study, a novel codelivery system was synthesized through one-pot coordination-driven self-assembly of 2-methylimidazole, zinc ion and chemotherapeutic drug (doxorubicin, DOX), followed by a surface decoration of photothermal agent (indocyanine green, ICG). To improve the targeting specificity performance, folic acid-conjugated polyethylene glycol (FA-PEG) antennas was connected on the surface of nanoparticles.Results The hybrid nanoparticles keep stable under neutral physiological condition but decompose when exposed to acidic environment, resulting in the on-demand release of DOX and ICG for chemo-photothermal combined therapy. Moreover, by switching the initial large size (~ 94 nm) to an ultrasmall size (∼10 nm) in cancer cells, the nanoparticles hold great potential to avoid nanotoxicity for clinical applications.Conclusion sThis work provides a new strategy for co-delivery of different therapeutics for combined cancer therapy with high cancer cell specificity and low nanotoxicity.
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JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 7
·1-8
·
IF 3.061
Liu Yuhao,Wang Jieqi,Chen Liping,He Yong
In order to enhance the adsorption and photocatalytic property of polyphenylene sulfide (PPS) melt-blown film, PPS melt-blown film was modified by loading ZIF-8 nanomaterial on the surface of the film via a simple solvothermal water method, the PPS melt-blown film was impregnated in advance. Film performance was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), X-ray diffraction (XRD). Results from FTIR and XRD showed that ZIF-8 was introduced into the modified PPS film successfully. The modified PPS film was endowed with excellent adsorption and photocatalytic compared with the original PPS by the result of enhanced dye removal. The removal rate of methyl blue (MB) by PPS/ZIF-8 film within the range of pH = 3–11 of the environmental solution were more than 80%, up to 99.1%. The dye removal rate still remained 80% after 5 repeat cycles, showed that the modified film has good stability.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 49
·74306-74318
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IF 5.19
Chen Aixia,Zhang Yixuan,Wei Xiao,Pang Jiaju,Hu Ruirui,Guan Juanjuan
Porous carbon is an excellent absorbent for pollutants in water. Here, we report a breakthrough in performance of porous carbon based on lignin prepared using sodium lignosulfonate (SLS), potassium carbonate and melamine as precursor, activator and nitrogen source, respectively. A series of characterization tests confirmed that in-situ nitrogen doping greatly enhanced porous structure, resulting in a specific surface area of 2567.9 m 2 g −1 and total pore volume of 1.499 cm 3 g −1 , which is nearly twice that of non-nitrogen-doped porous carbon. Moreover, adsorption experiments revealed that at 303 K, the saturated adsorption capacity of chloramphenicol was as high as 713.7 mg g −1 , corresponding to an improvement of 33.7%. Further, the prepared porous carbon exhibited a strong anti-interference against metal ions and humic acid. The adsorption process was confirmed to be an endothermic reaction dominated by physical adsorption, indicating that an increase in temperature is conducive to adsorption. The results of this study show that nitrogen-doped lignin-based porous carbon prepared by in-situ doping is a promising material to significantly alleviate water pollution owing to its low cost, excellent pore structure and good adsorption properties.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-12
·
IF 17.694
Zhai Yansheng,Huang Xiaoyan,Zhang Keren,Huang Yuchen,Jiang Yanlong,Cui Jingwei,Zhang Zhe,Chiu Cookson K. C.,Zhong Weiye,Li Gang
Enzymatic-based proximity labeling approaches based on activated esters or phenoxy radicals have been widely used for mapping subcellular proteome and protein interactors in living cells. However, activated esters are poorly reactive which leads to a wide labeling radius and phenoxy radicals generated by peroxide treatment may disturb redox-sensitive pathways. Herein, we report a photoactivation-dependent proximity labeling (PDPL) method designed by genetically attaching photosensitizer protein miniSOG to a protein of interest. Triggered by blue light and tunned by irradiation time, singlet oxygen is generated, thereafter enabling spatiotemporally-resolved aniline probe labeling of histidine residues. We demonstrate its high-fidelity through mapping of organelle-specific proteomes. Side-by-side comparison of PDPL with TurboID reveals more specific and deeper proteomic coverage by PDPL. We further apply PDPL to the disease-related transcriptional coactivator BRD4 and E3 ligase Parkin, and discover previously unknown interactors. Through over-expression screening, two unreported substrates Ssu72 and SNW1 are identified for Parkin, whose degradation processes are mediated by the ubiquitination-proteosome pathway.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 27
·21985-21994
·
IF 2.779
Zhang Hongda,Zhou Hong,Ge Jing,Liu Guolong,Tu Xuesong,Jin Liguo
Graphene oxide (GO) was prepared by improved Hummer's method and silica hollow sphere (SHS) was fabricated by improved template method. The GO-SHS hybrids were prepared by modified SHS attached to modified GO surface, following which the GO-SHS hybrids were introduced into the epoxy resin (EP) matrix to synthesize GO-SHS/EP composites. The results showed that the mechanical and dielectric properties of GO-SHS/EP composites were enhanced. With the content of 0.3 wt.% GO-3 wt.% SHS, the GO-SHS/EP composites achieved impact and flexural strengths of 23.4 kJ/m 2 and 148.4 MPa, respectively, which improved 369% and 72%, respectively, compared with pure EP. At 10 3 Hz, the dielectric constant of GO-SHS composite is 3.17, which is significantly lower compared to 3.79 for pure EP. This will provide an opportunity to expand the application of epoxy composites in electronic packaging.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 30
·14310-14323
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IF 4.682
Li Nanshu,Zhang Hanbing,Chen Zihao,Wei Jie
In this study, we report a kind of fluorescence-structural color photonic crystals (FSC-PCs) based on ultraviolet (UV)-responsive core-interlayer-shell (CIS) colloidal particles. The preparation process includes the synthesis of UV-responsive CIS colloidal particles and quick fabrication of FSC-PCs patterns. Here, fluorescent precursor spiropyran was added to the semi-continuous emulsion polymerization system and grafted onto polymer chains to form the colloidal particles, which were quickly assembled by spray coating method into FSC-PCs within a few minutes. The FSC-PCs have long-range disorder arrangement and angle-independent structural colors, which show structural colors in visible light and red fluorescent color in 365 nm UV light. Therefore, we designed and fabricated a two-side security card, both sides of which show different information under different light conditions. During the light switching progress, completely different information can be demonstrated reversibly, allowing data encryption and reading. The FSC-PCs with a simple quick assembly process and unique optical properties have profound potential in anti-counterfeiting and data display. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 28
·13481-13495
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IF 4.682
Li Wangchang,Su Guangzhou,Li Wanjia,Ying Yao,Yu Jing,Zheng Jingwu,Qiao Liang,Li Juan,Che Shenglei
Well-dispersed silica-coated FeCo nanocubes are mass prepared using the polyol process and are then amine-functionalized with 1,6- diaminohexane. Further, the almost “matrix-free” soft magnetic nanocomposites (SMNCs) are fabricated using the FeCo nanocubes as bricks, which are cross-linked by epoxy monomers in which the nanoparticles are well separated. These SMNCs exhibit a dense microstructure and extremely high resistivity that limit the eddy current loss, thereby allowing excellent high-frequency inductance performance in a few hundred megahertz and extending the cutoff frequency to 2–7 GHz. The permeability is approximately 8.0 with excellent high-frequency stability at 1 GHz. The quality factor of the nanocomposites exceeds 200 in the 100 MHz range and 500 in the few megahertz range that corresponds to the 36 and 13 nm silica-coating samples, respectively. Furthermore, they exhibit a novel microwave absorbing property with an extremely thin thickness. The absorption approaches − 46.5 dB at 2.41 GHz with only a 1.75 mm nanocomposite absorbing layer. This SMNC presents great potential as multifunction components to satisfy the urgent requirement of wide bandgap semiconductor power in the megahertz range and microwave devices in the gigahertz range.
Graphical abstract
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 8
·3613-3631
·
IF 3.134
Zhu Hai,Qiu Junqiang,Zhou Dan,Wang Haiyang,Xu Dan,Li Haixia
A series of activated carbon (CFAC-n, n = 1,2,3,4) adsorbents of higher adsorption capacity were synthesized through coconut fiber carbon (CFAC-0) and KOH activator (CFAC-0:KOH = 1:1, 1:2, 1:3, 1:4), respectively, by the heating method for chloramphenicol (CHL) adsorption. The pore diameter, pore volume, specific surface area and surface functional groups of CFAC-n were determined by several characterizations such as BET, XRD, Raman, TEM, FTIR and XPS. The adsorption kinetics of CFAC-n for CHL removal were investigated and the kinetic parameters were also calculated. According to the results, the adsorption capacity onto CFAC-n was positively correlated to the specific surface area. CFAC-3 possessed the largest specific surface area (1755 m 2 g −1 ) and the best adsorption amount (523.0 mg g −1 ). The adsorption conditions (adsorbent dosage, antibiotic initial concentration, adsorption temperature and pH value) of CFAC-3 showed to be directly related to the adsorption effect. In addition, it was found that the CHL adsorption onto CFAC-n was well suitable for fitting with pseudo-second-order kinetic model and Elovich kinetics model. The adsorption isotherm was carried on and it was found that CHL adsorption onto CFAC best fitted to Freundlich and Temkin model. Those results revealed that the adsorption process was heterogeneous adsorption by main chemisorption. The adsorption capacity for CHL onto CHAC-3 was much higher than those of reported low-cost adsorbents. The adsorption included mainly hydrogen bond and π–π conjugation interactions, and electrostatic interaction.
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Genes & Genomics
·
2022
·Vol. 44
·期 7
·867-878
·
IF 2.164
Li Mo,She Jiang,Ma Louyan,Ma Li,Ma Xiaorui,Zhai Jiajia
Background Destruction of pancreatic beta cells is the most typical characteristic of diabetes. Objective We aimed to evaluate the effect of berberine (BBR), a bioactive isoquinoline derivative alkaloid, on beta cell injury. Methods Rodent pancreatic beta cell line INS-1 was treated with 0.5 mM palmitate (PA) for 24 h to establish an in vitro beta cell injury model. Results BBR at 5 µM promoted cell viability, inhibited cell apoptosis and enhanced insulin secretion in PA-induced INS-1 cells. BBR treatment also suppressed PA-induced oxidative stress in INS-1 cells, as evidenced by the decreased ROS production and increased activities of antioxidant enzymes. In addition, suppressed ATP production and reduced mitochondrial membrane potential were restored by BBR in PA-treated INS-1 cells. It was further determined that BBR affected the expressions of mitophagy-associated proteins, suggesting that BBR promoted mitophagy in PA-exposed INS-1 cells. Meanwhile, we found that BBR facilitated nuclear expression and DNA-binding activity of Nrf2, an antioxidative protein that can regulate mitophagy. Finally, a rescue experiment was performed and the results demonstrated that the effect of BBR on cell viability, apoptosis and mitochondrial function in PA-induced INS-1 cells were cancelled by PINK1 knockdown. Conclusions BBR protects islet β cells from PA-induced injury, and this protective effect may be achieved by regulating mitophagy. The present study may provide a novel therapeutic strategy for β cell injury in diabetes mellitus.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Wan Xin,Liu Qingtao,Liu Jieyuan,Liu Shiyuan,Liu Xiaofang,Zheng Lirong,Shang Jiaxiang,Yu Ronghai,Shui Jianglan
Simultaneously increasing the activity and stability of the single-atom active sites of M–N–C catalysts is critical but remains a great challenge. Here, we report an Fe–N–C catalyst with nitrogen-coordinated iron clusters and closely surrounding Fe–N 4 active sites for oxygen reduction reaction in acidic fuel cells. A strong electronic interaction is built between iron clusters and satellite Fe–N 4 due to unblocked electron transfer pathways and very short interacting distances. The iron clusters optimize the adsorption strength of oxygen reduction intermediates on Fe–N 4 and also shorten the bond amplitude of Fe–N 4 with incoherent vibrations. As a result, both the activity and stability of Fe–N 4 sites are increased by about 60% in terms of turnover frequency and demetalation resistance. This work shows the great potential of strong electronic interactions between multiphase metal species for improvements of single-atom catalysts.
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Friction
·
2022
·Vol. 11
·期 4
·524-537
·
IF 4.924
Lan Ling,Di Yue-lan,Wang Hai-dou,Huang Yan-fei,Zhu Li-na,Li Xu-hang
In this study, micro/nanostructures are fabricated on the surface of 3Cr13 stainless steel via laser etching, and a superhydrophobic coating with silver nanoparticles (AgNPs) is prepared by utilizing the reduction-adsorption properties of polydopamine (PDA). We investigate the effect of soaking time from the “one-step method” on the reduction of nano-Ag, surface wettability, and antibacterial properties. Scanning electron microscopy is performed to analyze the distribution of nano-Ag on the surface, whereas X-ray energy dispersive spectroscopy and X-ray photoelectron spectroscopy are used to analyze the crystal structures and chemical compositions of different surfaces. Samples deposited with PDA on their surface are soaked in a 1H,1H,2H,2H-perfluorodecyltriethoxysilane water-alcohol solution containing AgNO 3 for 3 h. Subsequently, a “one-step method” is used to prepare low-adhesion superhydrophobic surfaces containing AgNPs. As immersion progresses, more AgNPs are deposited onto the surface. Compared with the polished surface, the samples prepared via the “one-step method” show significant antibacterial properties against both gram-negative Escherichia coli and gram-positive Staphylococcus aureus . The antibacterial properties of the surface improve as immersion progresses.
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