Inorganic Chemistry Frontiers
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2022
·Vol. 9
·期 5
·950-958
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IF 7.779
Shifei Kang,Zhihao Zhang,Maofen He,Zirou Fang,Di Sun,Lulu Zheng,Xijiang Chang,Lifeng Cui
Co-modification of graphitic carbon nitride (g-C3N4) photocatalysts can maximally optimize their intrinsic photoelectric structures, but usually involves complex multistep reactions, and thus is challenging because structural collapse and active site decay usually happen due to the complex process, over-treatment or conflict of different modification strategies. In this work, potassium iodate (KIO3), an edible salt additive, was used as a critical waste-free modifier in the thermal polymerization of g-C3N4, leading to a fast and coordinated co-modification of g-C3N4 photocatalysts. The final g-CN-KIO3 photocatalyst demonstrated a superior and balanced optical absorption ability and semiconductor band structure. In visible-light-driven photocatalytic model tests, g-CN-KIO3 showed a 3.25 times higher Cr(VI) photoreduction rate and five orders of magnitude lower residual bacteria in a photocatalytic sterilization within 120 min compared with raw g-C3N4. The photocatalytic performance of g-CN-KIO3 also outperformed all of the controls without maximized K–I–O co-modification (CN-K, CN-I, CN-O, and CN-KI). Photocurrent and electrochemical impedance experiments suggest that the co-modified photocatalysts have a faster charge separation ability, which is attributed to the multiple K–I–O co-modifications inducing an optimized surface electronic structure and slower carrier recombination. This work provides a new way to simplify and coordinate complex multi-factor regulation of materials.
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JOURNAL OF CATALYSIS
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2022
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IF 8.047
Shaomian Liu,Yongjun Ji,Wenqing Xu,Jianling Zhang,Ruihuan Jiang,Liang Li,Lihua Jia,Ziyi Zhong,Guangwen Xu,Tingyu Zhu,Fabing Su
Developing efficient catalysts for low reaction-temperature catalytic reduction of NO by CO (CO–DeNO x ) is desirable but very challenging. Here, we report that hierarchically interconnected porous (HIP) Mn x Co 3- x O 4 spinels, synthesized by a facile citric acid-assisted sol–gel method, can act as highly efficient catalysts for CO–DeNO x . The obtained Mn 0.3 Co 2.7 O 4 displayed a much-enhanced catalytic performance with 87% NO removal at 100 °C and a wide active-temperature window (100–400 °C). Its superior activity stems from the following reasons: (i) the high-valence of Mn 3+ , Mn 4+ , and Co 3+ species in the Co–O–Mn structure enables the high catalytic activity and the effective redox-cycling of the Co 3+ and Co 2+ adsorption sites; (ii) the HIP structure can significantly enhance gas diffusion. This work offers an avenue to design metal oxide catalysts for CO–DeNO x by effectively controlling the doping metal concentration and oxidation states of the active components.
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THERMOCHIMICA ACTA
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2022
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IF 3.378
Wang Guorong,Li Yu,Mei Zhiyuan,Xin Jie,Pan Wei,Wang Qingxin
Absrtact Benzoxazine is widely used in halogen-free copper clad laminate, printed circuit board and other fields in electronic information industry. However, its high curing temperature (about 250 °C) limits its future application. The effectiveness of benzoxazine catalyzed by transition metal p -toluenesulfonate(M(OTs) n ) and linear phenolic resin(PF), separately and mixed, were studied by DSC. The curing mechanism, structural changes and curing kinetics of different catalytic systems was studied by In-situ FT-IR and nonisothermal Differential Scanning Calorimeter(DSC).The results show that M(OTs)n and PF can simultaneously exist in benzoxazine as catalyst, and the catalytic ability is the strongest. The kinetic data shows that the introduction of catalyst can change the curing reaction mechanism of benzoxazine from autocatalytic curing reaction model to n-order reaction model. It follows the n-order reaction kinetic model based on Malek and Friedman method, and the theoretical calculation curve is in perfect accordance with the experimental data.
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SURFACE & COATINGS TECHNOLOGY
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2022
·
IF 4.865
X.Q. Du,Y.W. Liu,D.C. Chen,Z. Zhang,Y. Chen
In the present work, silane and graphene oxide (GO) nanocomposite was successfully constructed on copper using a facile co-electrodeposition procedure. Structure and composition characterizations revealed that the added GO nanosheets were partially electro-reduced and covalently bonded with silanol groups to form a more compact and uniform nanocomposite, which contributed to the enhanced chemical and mechanical performance of the electrodeposited silane/GO nanocomposite. Electrochemical tests indicated that the corrosion current density was decreased over two orders of magnitude. The protection efficiency was maintained above 99.8% after immersing in 1 mol/L sodium chloride aqueous solution 120 h. Meanwhile, the contact angle and sliding angle of electrodeposited silane/GO nanocomposite varied slightly after abraded 150 cycles, which presented an excellent mechanical durability. According to the above results, this work supplies a feasible and effective strategy for corrosion protection of conducting materials with long-term protectiveness and mechanical robustness in real-life applications.
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ACS Applied Polymer Materials
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2022
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IF 4.855
Zheng Zhang,Ting Li,Xuhui Zhang,Jing Huang,Bihua Xia,Jie Jiang,Mingqing Chen,Weifu Dong,Yang Wang
The increased demand for environmental protection and sustainable development has promoted the progress of renewable and biodegradable materials, especially in the field of packaging and agriculture. Such a status makes poly(butylene adipate-co-terephthalate) (PBAT) a kind of popular polyester material with an expanded utilization rate for its good mechanical properties and processability. However, a poor barrier property and light aging resistance are always the core issues during application. In order to overcome these shortcomings, Ti–dopamine (TiDA) nanoparticles were synthesized by hybridizing dopamine and a titanium precursor, resulting in a mixed phase of rutile and brookite, which was highly beneficial to light resistance. When TiDA was blended with PBAT at a low concentration (0.5–2.0 wt %), the PBAT composite films showed a great comprehensive performance. While maintaining good mechanical properties (tensile strength over 30 MPa and strain over 800%), the water vapor permeability was reduced by nearly 40%. The UV light of all wave bands could be blocked mostly by PBAT/TD composite films, which also had enhanced aging resistance, retaining over 20 MPa tensile strength and almost 100% strain after aging with UV radiation for 100 h. In summary, the PBAT/TD film material was promising for potential production in the field of agriculture and packaging.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 7
·4712-4720
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IF 2.779
Wu Guofa,Ma Mingtao,Li Aihua,Song Kaixin,Khesro Amir,Bafrooei Hadi Barzegar,Taheri-nassaj Ehsan,Luo Shaojin,Shi Feng,Sun Shikuan,Wang Dawei
In this article, garnet-type Y 3 Al 5 O 12 (YAG) were doped with Mg 2+ -Si 4+ ionic pairs and its effect on the structure and the microwave dielectric properties was investigated. It was revealed that in ceramics Y 3 Mg x Al 5-2 x Si x O 12 ( x = 0, 0.5, 1.0, 1.5, 2.0), increasing doping concentration decreased the sintering temperature and time for the optimal densification. X-ray diffraction studies showed that the samples are isostructural to Al 5 Y 3 O 12 garnet. All sample were formed a single phase except for x = 2.0, where a secondary peak was detected. Excellent microwave dielectric properties of ε r = 10.56, Q × f = 67,571 GHz and τ f = -35.23 ppm/°C were obtained for Y 3 Mg 0.5 Al 4 Si 0.5 O 12 ceramics sintered at 1625 °C for 5 h. The factors influencing the microwave dielectric properties of Y 3 Mg x Al 5-2 x Si x O 12 ceramics were further discussed by considering the ionic polarization, packing fraction, average grain size and chemical bond valence theory.
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Nano Energy
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2022
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IF 19.069
Guangzhao Zhang,Xiaolan Deng,Jiawei Li,Jun Wang,Guoli Shi,Yu Yang,Jian Chang,Kai Yu,Shang-Sen Chi,Hui Wang,Peng Wang,Zhongbo Liu,Yuan Gao,Zijian Zheng,Yonghong Deng,Chaoyang Wang
The employment of localized high concentration electrolytes (LHCEs) has been demonstrated as an effective strategy for the fabrication of next-generation high-energy-density lithium metal batteries . However, the low ionic conductivity of LHCEs and their parasitic side reactions with lithium metal anodes severely hinder the cycling stability of lithium metal batteries. Herein, a partially fluorinated ether of bis (2,2-difluoroethyl) ether (BDE) is proposed as a bifunctional co-solvent to form novel LHCEs for realizing dendrite-free and long-term lithium metal batteries. The BDE co-solvent serves as a diluent to improve the ionic conductivity up to 6.4 mS/cm by dissociating lithium salt via weak interaction and decreasing the electrolyte viscosity. In addition, the BDE co-solvent could promote the formation of uniform lithium fluoride (LiF)-rich solid electrolyte interphase (SEI) to suppress the dendrite deposition by regulating the solvation shell structure , resulting in high Coulombic efficiency of 99.6%. As a result, the assembled full cell exhibits outstanding cycling stability (97% capacity retention after 200 cycles @0.5 C) with high areal capacity (2 mAh/cm 2 ) and high rate capability (2 C) under practical conditions (50 µm Li, lean electrolyte: 3 g/Ah). We also demonstrate the real application of electrolyte with a commercial cathode in 320-mAh-level pouch cells.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2022
·
IF 5.999
Rui Li,Cong Feng,Runqian Yang,Xiangfeng Li,Liping Ruan
In this study, a filter-like blocking system based on MSN with small gatekeeper 5- mercapto-2 nitrobenzoic acid (MNBA) has developed. The MNBA grafted nanoparticle MSN-SS-MNBA shows excellent blocking performance with negligible leakage when loaded with doxorubicin (DOX), and the release profiles illustrate stimuli-responsive property when triggered by GSH. Viability experiments indicate that MSN-SS-MNBA has obvious inhibition for both Hela cells and HCT116 cells, while showing good biocompatibility for L929 cells, which suggests that the modified MNBA has a synergistic effect on cancer cells-killing. Since the small grafted molecule MNBA cannot block the channels of MSN via self-assembly, a filter-like blocking model that the loaded drug bridged with modified MNBA to fulfill the blocking process is proposed. The novel blocking strategy provides a new possible way for pore blocking, and the small nanovalve can be used as synergistic molecule for cancer therapy.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2022
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IF 5.062
Xin Chen,Duanxiu Li,Yanwen Duan,Yong Huang
Drug co-amorphization is an emerging technology to improve the pharmacokinetic properties of drugs and overcome their side effects. Herein co-amorphization of sinomenine (SIN), an anti-rheumatoid arthritis alkaloid, and an antihistamine drug tranilast (TRA) was investigated for the sustained release of SIN and alleviating its histamine-release adverse reactions. The full co-amorphization of SIN-TRA was determined by powder X-ray diffraction and modulated temperature differential scanning calorimetry , while their CO 2 − and N + –H stretching vibrations in FTIR and protonated nitrogen signals in N 1s X-ray photoelectron spectra suggest the proton transfer between SIN and TRA. These intermolecular interactions could also be observed in their 1D and 2D NMR spectra. All co-amorphous samples exhibited sustained SIN release and excellent physical stability. Therefore, our study not only characterized the strong intermolecular interactions between SIN and TRA, but also discovered a promising drug combination strategy for the sustained release of SIN and reduction of its side effects.
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RESOURCES CONSERVATION AND RECYCLING
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2022
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IF 13.716
Longgong Xia,Shuheng Cao,Qihou Li,Xingwu Lu,Zhihong Liu
Copper smelting slag and gypsum residue are by-products in copper making processes, and both contain valuable elements, such as copper, sulfur, etc. However, there is more than 0.25 wt% Cu in the smelting slag, which cannot be recovered with present technologies. A sulfidation process, which used the gypsum residue as the sulfur resource, was proposed and studied in treating copper smelting slag. Obtained results showed: 1) CaSO 4 transformed to CaS under reductive decomposing conditions, and reactions between CaS and slag components occurred spontaneously during the slag cooling process; 2) the Fe/SiO 2 mass ratio of the slag, the CaS excess coefficient (α), and the cooling rate (v) had an influence on the terminal phase composition, sulfide particle size, etc.; 3) under optimized conditions (Fe/SiO 2 =1.0: α=5, v = 1.00°C/min; Fe/SiO 2 =1.3: α=4, v = 0.25°C/min; Fe/SiO 2 =1.8: α=5, v = 0.25°C/min), the Cu contents in non-sulfide phases were lower than 0.08 wt%, and the mean particle size of sulfides were 37- 40 μm, which were feasible for flotation recoveries. TCLP (Toxicity Characteristic Leaching Procedure) tests indicated that the co-treatment process improved the stability of these starting materials. Based on samples characterization and thermodynamic analysis, a corresponding reaction mechanism was proposed.
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JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-18
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IF 9.429
Chen Youlu,Chen Zuoguan,Duan Jianwei,Gui Liang,Li Huiyang,Liang Xiaoyu,Tian Xinxin,Liu Kaijing,Li Yongjun,Yang Jing
Peripheral vascular disease (PVD) is a common clinical manifestation of atherosclerosis. Vascular endothelial growth factor (VEGF) gene therapy is a promising approach for PVD treatment. However, due to single-gene therapy limitations and high H2O2 pathological microenvironment, VEGF gene therapy are not as expectations and its clinical application are limited. Synergistic effects of Nerve factors and vascular factors in angiogenesis have attracted attention in recent years. In this study, VEGF and nerve growth factor (NGF) genes co-delivery nanoparticles (VEGF/NGF-NPs) were prepared by using H2O2 responsive 6s-PLGA-Po-PEG as a carrier. 6s-PLGA-Po-PEG could react with H2O2 specifically due to the internal peroxalate bond. Angiogenic effects of VEGF/NGF-NPs has been evaluated in cells and hindlimb ischemia mice model. Results showed that VEGF/NGF-NPs promoted VEGF and NGF co-expression simultaneously, eliminated excessive H2O2, strengthened reactions between SH-SY5Ys and HUVECs, and finally enhanced migration, tube formation, proliferation and H2O2 damage resistance of HUVECs. VEGF/NGF-NPs also recovered blood perfusion, promoted the expression of VEGF, NGF, eNOS and NO, and enhanced vascular coverage of pericytes. Treatment effects of VEGF/NGF-NPs may related to VEGF/eNOS/NO pathway. Altogether, VEGF/NGF-NPs eliminated excessive H2O2 while achieving gene co-delivery, and promoted stable angiogenesis. It’s a promising way for PVD treatment by using VEGF/NGF-NPs.Graphical Abstract
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Food & Function
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2022
·Vol. 13
·期 6
·3419-3430
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IF 6.317
Qun Wang,Ling Wang,Abdullah,Wenni Tian,Mingyue Song,Yong Cao,Jie Xiao
The concept of “synergy” and its applications has rapidly increased in the food industry as a practical strategy to preserve and improve health-promoting effects of the functional ingredients. In this study, hydrophilic epigallocatechin-3-gallate (EGCG) and lipophilic lycopene (LYC) were loaded separately (EGCG loaded PDE (PE), and LYC loaded PDE (PL), and also co-delivered (PEL) within a pickering double emulsion (PDE) system to induce synergistic hypolipidemic effect. Their effects on the serum lipid profile, weight of tissue fats, liver lipid droplet accumulation, and liver steatosis in a high-fat diet rat model were investigated. Moreover, different pathways (HMG-CoR, LDL-R, PPARγ and AMPK) involved in triggering hypolipidemic effects were verified at both mRNA and protein levels. The study's findings showed that inclusion of EGCG improved while LYC negatively affected the physical stability of PDE. The contents of total cholesterol and triacylglyceroles in serum and liver as well as the weight of tissue fats were substantially reduced in all groups (PE/PL/PEL). The alteration in absorption site of EGCG and enhanced bioaccessibility of LYC when delivered by PDE strengthened the hypolipidemic properties of PE and PL, mainly through triggering the pathways of HMG-CoR, LDL-R and PPARγ. Furthermore, the synergistic hypolipidemic effect of PEL was achieved mainly through the activation of the AMPK pathway.
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