JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2021
·
IF 2.993
Desheng Pan,Qifeng Kuang,Peng Tong,Wei Tong,Liubing Fan,Jing Zhao,Da Li,Chuljin Choi,Zhidong Zhang
Challenges still remain in producing room-temperature ferromagnetism/ferrimagnetism in inorganic–organic hybrid compounds. Here, we report the Fe vacancy-doped inorganic–organic (Fe x Se 2 ) 2 Fe(dien) 2 (dien = diethylenetriamine, x = 0.86) hybrid cuboids by self-assemble of finite one-dimensional (1D) FeSe 2 chains and Fe(dien) 2 complexes. A growth model is proposed by kinetically controllable syntheses of novel Fe 2x+1 Se 4 (dien) 2 hybrids. The Rietveld refinement reveals that Fe vacancies in the Fe 2.71 Se 4 (dien) 2 hybrid cuboids induce large distortions of the FeSe 2 chains and the room-temperature lattice parameters are a = 9.225(4) Å, b = 18.021(8) Å and c = 11.609(6) Å. Magnetic measurements and electron spin resonance spectra of the Fe 2.71 Se 4 (dien) 2 hybrid cuboids show the ferrimagnetism with the Curie temperature (T C ) of 600 K and the spin glass state with the freezing temperature (T f ) of 108 K. Impressive room-temperature ferrimagnetic properties of the Fe 2.71 Se 4 (dien) 2 hybrid cuboids were ascribed to the high concentration of Fe 3+ vacancies (0.29 per cell) in the hybrid cuboids, which is supported by the 57 Fe Mössbauer spectrum fitting based on the ferrimagnetic model.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Shuo Geng,Yarong Huang,Akhmat Fauzi,Yongsheng Yu,Yequn Liu,Weiwei Yang
The synthesis of highly efficient non-noble bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in the same electrolyte is important for the industrial application of electrocatalytic water splitting. Herein, non-noble bifunctional electrocatalyst Ni 0.67 Co 0.33 (PO 3 ) 2 nets with optimized morphology were successfully synthesized. Owing to the micropores with the accelerated electrolyte and gases transfer and nanopores architecture with more exposed active edge sites, the self-supported Ni 0.67 Co 0.33 (PO 3 ) 2 -12 h electrode exhibits a superior water splitting performance. Impressively, the Ni 0.67 Co 0.33 (PO 3 ) 2 -12 h electrode only needs a cell voltage of 1.46 V to achieve 10 mA/cm 2 and shows over 22 h stability at 10, 50 and 100 mA/cm 2 , respectively. This present work suggests a unique and earth abundant material synthesis method for water electrolysis, which has broad prospects for practical water splitting application.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Lei Xu,Shaoyu Tang,Dan Li,Xiao Ma,Yunqing Zhu,Jianjiang Lu,Junfeng Niu
The current study presents a comprehensive and novel attempt to degrade aqueous tri(2-chloroethyl) phosphate (TCEP) by metal-oxide-coated Ti anodes for the first time. Six metal-oxide-coated Ti electrodes (Ti/SnO 2 -Sb, Ti/SnO 2 -Sb/PbO 2 , Ti/SnO 2 -Sb/La-PbO 2 , Ti/SnO 2 -Sb/Ce-PbO 2 , Ti/SnO 2 -Sb/Ga-PbO 2 and Ti/SnO 2 -Sb/Zr-PbO 2 ) were prepared and characterized. Ti/SnO 2 -Sb/La-PbO 2 showed the highest pseudo-first-order reaction rate constant (2.1 × 10 −2 min −1 ) and lowest energy consumption (21.35 Wh L −1 ) in the degradation of 1 mg L −1 TCEP at 10 mA cm −2 , mainly because of its highest oxygen evolution potential and OH production. Higher current density and neutral condition favored TCEP degradation, while the presence of Cl − or NO 3 − could suppress the degradation. In the electrochemical degradation of 10 mg L −1 TCEP, mineralization percentage of 48.0% (mineralization current efficiency of 0.30%) and PO 4 3− release percentage of 72.7% were achieved at 150 min. By the attack of OH on the C O and C Cl bonds in TCEP molecular structure, products of chloroethanol, Cl − and PO 4 3− were released, with the major electrocatalytic degradation pathways of dechlorination and hydroxylation. Based on the results of flow cytometry, the relative toxicity to Escherichia coli effectively decreased to 4.93% in TCEP degradation. Compared with the UV-AOPs, electrochemical oxidation process is proved to be feasible and effective for mineralization and detoxification of TCEP in water.
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Kun Song,Wenting Li,Rui Yang,Yongjie Zheng,Xiaoshuang Chen,Xin Wang,Guoli Chen,Weichao Lv
As a battery-type electrode material , Ni(OH) 2 has been widely concerned for its ultra-high theoretical specific capacity, however, its poor conductivity and lack of effective active sites hinder its application. It is a great challenge to develop Ni(OH) 2 based supercapacitors . It is critical to improve the electrical conductivity and effective active sites to make full use of the energy storage of Ni(OH) 2 -based materials. Therefore, Ni(OH) 2 /NiS composites are designed and prepared by controllable low temperature chemical deposition and ion exchange method. Ni(OH) 2 nanosheets with various morphology are controllably prepared by low temperature chemical deposition, and then Ni(OH) 2 /NiS composites are controllably prepared on Ni(OH) 2 substrate by ion exchange. Due to the doping of NiS into Ni(OH) 2 nanosheets, the conductive network structure is formed, which makes the composite exhibit excellent electrochemical properties, such as high specific capacity, large specific surface area and good electrical conductivity. The as-fabricated Ni(OH) 2 /NiS indicates an outstanding specific capacity of 240.5 mAh g −1 at 1 A g −1 . This paper detailed studies the practical application of hybrid supercapacitors , which may inspire future researchers to design Ni(OH) 2 -based materials with desired applications.
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 42
·18264-18273
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IF 3.288
Yunqi Wang,Xu Tang,Zhixiang Liu,Zhi Liu,Yongsheng Yan,Boting Yang,Zhi Zhu
A Z-scheme MoS2/CuO photocatalyst is successfully developed using a hydrothermal and calcination method, which has excellent activity (96%) in the degradation of 2-mercaptobenzothiazole (MBT) under visible light irradiation. The reaction rate constants of MBT degradation on the MoS2/CuO heterojunction are 8 and 6 times higher than those of pure MoS2 and the original CuO, respectively. The as-prepared photocatalyst was characterized using XRD, SEM, XPS and electrochemistry measurement. From the experimental results, the significantly enhanced photocatalytic activity is mainly ascribed to the formation of a Z-scheme heterostructure between MoS2 nanosheets and flower spherical CuO, effectively improving the separation efficiency of photogenerated carriers. What is remarkable is that the Z-scheme electron transfer process leads to a large accumulation of photogenerated electrons and holes, improving the oxidation and reduction properties of CuO and MoS2. Moreover, an intensive study of the mechanism has proved that holes, superoxide radicals and hydroxyl radicals are all active substances in the degradation process. This study opens up a new way to devise novel and highly efficient MoS2-based photocatalysts for the degradation of organic pollutants.
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DALTON TRANSACTIONS
·
2020
·Vol. 50
·期 1
·391-397
·
IF 4.174
Yunmei Du,Huimin Zhao,Wensi Wang,Yu Yang,Minghui Wang,Shaoxiang Li,Yanru Liu,Lei Wang
A heterogeneous structure formed by coupling two or more phases can reinforce the activity of active sites and expedite electron transfer, which is conducive to boosting its electrocatalytic activity. Herein, we designed nickel foam supported (NiCo2)Se@Ni(OH)2 (NCS@NH) heterojunction nanosheets by a two-step method. First of all, the NiCo2S4@Ni(OH)2 (NiCo2S4@NH) nanosheets coated on nickel foam were acquired via a hydrothermal method. In the selenization treatment that followed, NiCo2S4@NH was converted into NCS@NH heterogeneous nanosheets in which the selenide nanoparticles decorated on the surface of the Ni(OH)2 nanosheets formed heterojunction interfaces, and the heterogeneous structure could accelerate electron transfer, thus improving the catalytic activity. The Ni(OH)2 nanosheets can adequately contact the electrolyte and promote the decomposition of water. Meanwhile, the thickness of the Ni(OH)2 nanosheets gradually decreases with the increase of Co doping (1.5–2.5 mmol), consequently affecting the HER properties. Notably, when the amount of Co salt added is 2 mmol, NCS@NH exhibited superior HER properties (with a voltage of 253 mV at 100 mA cm−2) and excellent stability for 24 h.
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MOLECULES
·
2020
·Vol. 25
·期 23
·5778
·
IF 3.267
Yangke Wanyan,Xixi Xu,Kehang Liu,Huidan Zhang,Junai Zhen,Rong Zhang,Jumei Wen,Ping Liu,Yuqing Chen
Inhibition of the glycolytic pathway is a critical strategy in anticancer therapy because of the role of aerobic glycolysis in cancer cells. The glycolytic inhibitor 2-Deoxy-d-glucose (2-DG) has shown potential in combination with other anticancer agents. Buforin IIb is an effective antimicrobial peptide (AMP) with broad-spectrum anticancer activity and selectivity. The efficacy of combination treatment with 2-DG and buforin IIb in prostate cancer remains unknown. Here, we tested the efficacy of buforin IIb as a mitochondria-targeting AMP in the androgen-independent human prostate cancer cell line DU145. Combining 2-DG with buforin IIb had a synergistic toxic effect on DU145 cells and mouse xenograft tumors. Combination treatment with 2-DG and buforin IIb caused stronger proliferation inhibition, greater G1 cell cycle arrest, and higher apoptosis than either treatment alone. Combination treatment dramatically decreased L-lactate production and intracellular ATP levels, indicating severe inhibition of glycolysis and ATP production. Flow cytometry and confocal laser scanning microscopy results indicate that 2-DG may increase buforin IIb uptake by DU145 cells, thereby increasing the mitochondria-targeting capacity of buforin IIb. This may partly explain the effect of combination treatment on enhancing buforin IIb-induced apoptosis. Consistently, 2-DG increased mitochondrial dysfunction and upregulated Bax/Bcl-2, promoting cytochrome c release to initiate procaspase 3 cleavage induced by buforin IIb. These results suggest that 2-DG sensitizes prostate cancer DU145 cells to buforin IIb. Moreover, combination treatment caused minimal hemolysis and cytotoxicity to normal WPMY-1 cells. Collectively, the current study demonstrates that dual targeting of glycolysis and mitochondria by 2-DG and buforin IIb may be an effective anticancer strategy for the treatment of some advanced prostate cancer.Keywords:buforin IIb;2-Deoxy-d-glucose;mitochondria;glycolysis;prostate cancer
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yanying Hao,Anping Tian,Jin Zhu,Jinshi Fan,Yong Yang
5-Hydroxymethyl-2-furancarboxylic acid (HFCA), a promising biomonomer from renewable resources, was used to synthesize two bio-based plasticizers, namely, hexyl 5-((hexanoyloxy)methyl)-2-furancarboxylate (HHMFC) and dihexyl 5,5′-(oxybis(methylene))bis(furan-2-carboxylate) (DHOBFC). The chemical structures of these prepared plasticizers were confirmed using Fourier transform infrared and nuclear magnetic resonance, and then, their plasticization effects on poly(vinyl chloride) (PVC) were also studied. As a result, HFCA-based plasticizers were miscible with PVC and exhibited excellent plasticization performances, compared with commercial dioctyl phthalate. It was noted that HHMFC had a much better plasticizing effect on the PVC film than DHOBFC; however, it displayed a poorer volatility resistance and exudation resistance, which could be attributed to its smaller molecular weight. Besides, because each rigid furan ring of the synthesized plasticizers contained one oxygen atom, the polarity of HFCA-based plasticizers was improved, which inhibited them from migrating from the PVC matrix into nonpolar solvents. Therefore, the HFCA-based plasticizers have good potential as primary plasticizers for PVC.
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VETERINARY MICROBIOLOGY
·
2021
·
IF 3.293
Hexiang Jiang,Tong Wu,Jianan Liu,Xibing Yu,Hongtao Liu,Chuntong Bao,Mengmeng Liu,Yalu Ji,Xin Feng,Jingmin Gu,Wenyu Han,Na Li,Liancheng Lei
Streptococcus suis serotype 2 (SS2) is an important zoonotic pathogen that causes meningitis. The ubiquitously expressed 40S ribosome protein SA (RPSA) is a multifunctional protein involved in the pathogenesis of multiple pathogens, especially those causing meningitis. However, the role of RPSA in SS2-induced meningitis is not clear. In this study, immunofluorescence staining revealed that SS2 infection promoted the intracellular transfer of RPSA to the surface of human cerebral microvascular endothelial cells (HCMECs). Moreover, SS2 infection promoted the accumulation of caveolin 1 (CAV1) and the formation of membrane bulges where RPSA enveloped CAV1 on the cell surface. SS2 infection also caused dynamic changes in the localization of RPSA and CAV1 on the cell surface which could be eliminated by disruption of caveolae/rafts by addition of methyl-β-cyclodextrin (MβCD). Co-immunoprecipitation analysis demonstrated that α-enolase (ENO), a key virulence factor of SS2, interacted with RPSA, and promoted the interaction between RPSA and CAV1. Immunofluorescence staining, western blotting and flow cytometry analyses showed that damaged caveolae/rafts significantly enhanced ENO adhesion to HCMECs, promoted the “destruction” of RPSA by ENO, and enhanced the toxic effect of ENO on HCMECs. Importantly, these effects could be relieved upon the addition of cholesterol. We conclude that caveolae/rafts weaken the toxic effect of SS2 ENO on RPSA-mediated events in HCMECs. Our study has led to better understanding of the roles of RPSA and caveolae/rafts upon SS2 infection, and a new pathological role for RPSA in infection.
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Materials Today Chemistry
·
2024
·
IF 6.7
Zhizhu Yue,Yonghe Yu,Tianjun Hu,Ying Wang,Lulu Cao,Yanxia Zhang,Yuhong Chang,Linjuan Pei,Jianfeng Jia
The development of economical multiphase photocatalysts is a significant challenge in achieving large-scale industrialization. Rational catalyst design can help in achieving efficient, energy-saving, and green catalytic reactions, making it more feasible to screen potential catalyst candidates. In this paper, we have successfully developed a high-efficiency photocatalyst Cu-doped Cu 2 WO 4 (OH) 2 (CWOH-y, where y represents the molar ratio of copper tungsten source), which can catalyze the aerobic coupling reaction of amines to produce corresponding imines under visible light irradiation. N-benzylidenebenzylamine is synthesized under visible light at 25 °C with an 89 % yield. Under natural light at around 35 °C (mean light intensity of 50 mW/cm 2 ), 94 % of the benzylamine is converted, and 97 % of the product is N-benzylidenebenzylamine. The catalyst exhibits high efficiency due to the synergistic effect of doped Cu, Cu 2 WO 4 (OH) 2 , and visible light. This combination generates a significant amount of superoxide free radicals and singlet oxygen when exposed to visible light. Furthermore, the catalyst demonstrates universality and stability with a wide range of amine derivatives. This study introduces a new environmentally friendly photocatalytic pathway for the synthesis of imines and emphasizes the potential applications of Cu 2 WO 4 (OH) 2 .
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ACS Biomaterials Science & Engineering
·
2020
·
IF 4.152
Chuyu He,Yao Jin,Yunqiang Deng,Yang Zou,Shidi Han,Chuhang Zhou,Yuanhang Zhou,Yan Liu
The intestine epithelium is considered to be the most critical obstacle for nanoparticles for oral delivery of water-insoluble and poorly absorbed drugs. Based on the specific transporters located on the apical membrane of the intestinal epithelium, the carnitine-conjugated polymeric micelles targeting to the carnitine/organic cation transporter 2 (OCTN2) were developed by combining carnitine-conjugated poly(2-ethyl-2-oxazoline)-poly(d,l-lactide) with monomethoxy poly(ethylene-glycol)-poly(d,l-lactide). The carnitine-conjugated micelles with favorable stability in gastrointestinal fluid were validated to remarkably increase the cellular internalization and transcellular transport, while these were not the cases in the presence of free carnitine. These were further confirmed by more distribution of the micelles within epithelial cells, on the apical and basolateral side of the epithelium in mice. Additionally, identification of the carnitine-conjugated micelles by OCTN2 was detected to facilitate cellular uptake of the micelles via fluorescence immunoassay. Both clathrin and caveolae/lipid rafts pathways mediated endocytosis and transcellular transport of the carnitine-conjugated micelles, implying the enrichment of endocytic and transcellular transport pathway compared with that of carnitine-unconjugated micelles. Further, the intracellular trafficking process of the carnitine-conjugated micelles was tracked under confocal laser scanning microscopy, which involved in intracellular compartments such as late endosomes, lysosomes, endoplasmic reticulum, and Golgi apparatus as well. In conclusion, the current study provided an efficient strategy to facilitate the oral absorption of water-insoluble and poorly absorbed agents using intestinal transporter-mediated polymeric micelles.
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ACS Omega
·
2020
·
IF 2.87
Ning Song,Shao-Peng Chen,Xiao-Wei Fan,Yu-Hui Tan,Wen-Juan Wei,Yun-Zhi Tang
The molecular design and regulation has shown bright future for constructing smart molecular materials such as ferroelectrics, dielectric switches, electro-optic effect, and so forth. Here, by poly-H/F substitution in a simple organic-inorganic hybrid 2[CH2FCH2NH3]·[CdCl4], 1 (CH2FCH2NH3 = fluorine ethylamine cation), we obtained two novel hybrids, namely, 2[CHF2CH2NH3]·[CdCl4], 2 (CHF2CH2NH3 = 2,2′-difluorine ethylamine cation) and 2[CF3CH2NH3]·[CdCl4], 3 (CF3CH2NH3 = 2,2′,2″-trifluorine ethylamine cation). Further investigations show that compounds 1, 2, and 3 experience solid reversible phase transitions with temperatures at 294, 319, and 329 K respectively. These unique phase transitions were confirmed by their remarkable dielectric and heat anomalies around the phase transition temperatures. X-ray single-crystal diffraction analyses before and after the phase transitions show that the order–disorder motions of F atoms and the twist motions from the 2D [CdCl4]2– framework lead to these solid reversible phase transitions. Also, the Hirshfeld surface calculation of compounds 1, 2, and 3 suggests that the increasing ratio of the F···F interaction from the intermolecular interaction makes a major contribution for the substantial increase of their phase transition temperatures.
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