MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Nana Yang,Xinyong Zhou,Xinru Qi,Jiahao Li,Weiming Fang,Huaiguo Xue,Zhengfei Yang
Measurement of nitrite is needed for the control of nitrite pollution and to decrease the health risks and protect environment. It is attractive to design novel electrocatalysts for the efficient electrochemical quantification of nitrite. Herein, a sequence of Co, N -doped-porous carbon rods (CoN-PCRs) were designed and prepared through the calcination of rod-shaped mixed-metal zeolitic imidazolate framework precursors (ZIF-L) with different Co/Zn ratios. It was observed that the highest surface area and best response were obtained with the CoN-PCRs-0.6. Furthermore, its morphology and structure were characterized by several techniques. Additionally, the electrochemical sensing performances of CoN-PCRs-0.6 to nitrite were studied. Benefiting from the structural merits, the constructed sensor showed a low detection limit of 0.14 μM and achieved two wide dynamic ranges 0.2–4000 μM and 4000–100000 μM. The sensor also possessed good specificity, reproducibility, and stability toward nitrite quantification. Ultimately, the rapid and accurate measurement of nitrite in tap water was successfully realized.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hanhao Huang,Yulian Shang,Haofei Li,Qi Feng,Yang Liu,Junlin Chen,Hua Dong
Pancreatic islets transplantation is an optimal alternative to exogenous insulin injection for long-term effective type 1 diabetes treatment. However, direct islets transplantation without any protection can induce cell necrosis due to severe host immune rejection. Insufficient O2 supply induced by the lack of capillary network at the early stage of islets transplantation is another critical constraint limiting islets survival and insulin-secretion function. In this paper, we design a novel co-transplantation system composed of islets-laden nanocomposite microgels and O2-generating microspheres. In particular, nanocomposite microgels confer the encapsulated islets with simultaneous physical protection and chemical anti-inflammation/immunosuppression by covalently anchoring rapamycin-loaded cyclodextrin nanoparticles to microgel network. Meanwhile, O2-generating microspheres prepared by blending inorganic peroxides in biodegradable polycaprolactone and polylactic acid can generate in situ O2 gas and thus avoid hypoxia environment around transplanted islets. In vivo therapeutic effect of diabetic mice proves the reversion of the high blood glucose level back to normoglycemia and superior glucose tolerance for at least 90 days post co-transplantation. In brief, the localized drug and oxygen codelivery, as well as physical protection provided by our co-transplantation system, has the potential to overcome to a large extent the inflammatory, hypoxia, and host immune rejection after islets transplantation. This new strategy may have wider application in other cell replacement therapies.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Yunfei Zhang,Yulong Li,Mengmeng Wei,Dengtao Yang,Qiuyu Zhang,Baoliang Zhang
In this study, a new lightweight one-dimensional absorber Co@NC@MoS 2 was designed and prepared. Firstly, polydopamine (PDA) was coated by oxidative self-polymerization with cobalt-nitrilotriacetic acid chelate nanowires (Co-NTAC) as template. Then core-shell structured magnetic hierarchical nanotubes (Co@PDA@MoS 2 ) were prepared by one-step hydrothermal method. After thermal annealing, PDA layer was transformed into nitrogen doped carbon layer (NC) to obtain the efficient microwave absorber Co@NC@MoS 2 . The removal of template and growth of MoS 2 were completed simultaneously, the preparation process was simplified. Because of its good magnetic loss and dielectric loss, Co@NC@MoS 2 shows excellent microwave absorption performance. Under filler content of 15 wt.%, the minimum reflection loss (RL min ) can reach -61.97 dB@9.2 GHz, and the effective absorption bandwidth (EAB) is 5.6 GHz. The electromagnetic parameters of Co@NC@MoS 2 can be further adjusted by changing the load of MoS 2 . Meanwhile, the structure and composition of Co@NC@MoS 2 were systematically analyzed. The influence of the microstructure on the microwave absorbing properties was investigated, and the microwave attenuation mechanism is revealed. As an efficient and lightweight absorber, Co@NC@MoS 2 has potential application value in the construction of new stealth coatings.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Moke Zhou,Hetuo Chen,Guohong Zhou,Yi He,Shuren Zhang,Bin Tang
Four control experiments (S1: Y 3 Al 5 O 12 , S2: Y 3 Al 5 O 12 +1 wt%Nb 2 O 5 , S3: Y 3 Al 4.955 Nb 0.045 O 12 , S4: Y 2.955 Al 5 Nb 0.045 O 12 ) were designed to investigate the co-effects of Nb 2 O 5 and non-stoichiometry on the microwave dielectric properties of Y 3 Al 5 O 12 . The beneficial results of Nb 2 O 5 doping are demonstrated based on X-ray patterns, electron diffraction information, Rietveld refinement , and micromorphological characterization. Differences in dielectric properties were explored using lattice defects, ion polarizability, bond valence, and Raman spectroscopy . In contrast, the Y-deficient sample (S4) possesses the best dielectric properties ( ε r ∼ 10.37, Q × f ∼ 161,724 GHz and τ f ∼ -33.8 ppm/°C).
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Manman Zhao,Mingqiang Chen,Yakun Zong,Zhanxiong Li
In this paper, by means of carbene polymerization, low surface energy polymers were covalently grafted onto the surface of cotton fabric, which successfully constructed a rough morphology in-situ and provided excellent hydrophobic properties. Firstly, the grafting site was constructed on the surface of cotton fiber, and octyl diazoacetate was synthesized as a precursor and grafted onto cotton fiber. However, due to the soft side-chain grafted polymer was film-forming, the WCA of fabric grafted with octyl diazoacetate was only 124.0 ± 2.1°. In order to construct a roughening morphology in-situ, tert -butyl diazoacetate and phenyl diazoacetate was introduced and co-grafted with octyl diazoacetate. It was found that tert -butyl diazoacetate and phenyl diazoacetate were polymerized into spherical and cubic crystals on the surface of cotton fiber, respectively. These two precursors were co-grafted with octyl diazoacetate on the surface of cotton fiber to produce a rigid polymer chain and form roughening crystal morphology . The surface morphology of the treated fiber was tested by SEM, AFM and ImageJ, it was found that different morphologies could be formed on the fiber surface when octyl diazoacetate and tert -butyl diazoacetate were co-grafted with different molar ratios. Among them, when octyl diazoacetate/ tert -butyl diazoacetate(1:19)was used, the composite morphology of polymer film coated particles can be formed on the fiber surface, and the surface modification of “roughening” increased the WCA of the fabric to 143.2 ± 1.8°, which gave the fabric good hydrophobicity . When octyl diazoacetate was co-grafted with phenylethylcarbene diazoacetate at the molar ratio of 1:19, the surface of the treated fiber appeared film-like and microspheres embedded in the membrane. It is worth pointing out that the film-wrapped microsphere on the fiber surface provides a lotus leaf-like morphology. The WCA of the as-prepared fabric reached 151.2 ± 0.8° with excellent self-cleaning properties and super hydrophobicity.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Ning Liu,Dong Cao,Wenhao Liu,Huimin Zhang,Yinhai Zhu,Le Chang,Dengfeng Wu,Daojian Cheng
Constructing highly efficient and low cost electrocatalysts for oxygen evolution reaction (OER) is pivotal to various energy storage and conversion devices. In this work, five different rare earth (RE) metals doped (La, Ce, Pr, Nd, Er) Ag-nanoparticles-decorated α-Co(OH) 2 nanostructured electrocatalysts, which are grown on nickel foam (NF), are successfully prepared by a facile one-step hydrothermal approach. It is found that La-doped 2D ultrathin (∼2.0 nm) CoAg nanosheets arrays (denoted as La–CoAg/NF) can demonstrate the highest electrochemical activity towards OER in 1 M KOH solution among these RE-doped electrocatalysts. It delivers the lowest overpotential at 10 mA cm −2 (233 mV), the smallest Tafel slope (44.3 mV dec −1 ) and extraordinary stability for 35 h with no significant change during harsh OER process. The reasons for the enhanced performance may come from unique ultrathin 2D nanostructure and La-induced strong electronic interaction among Co, Ag, and La atoms. This work provides an essential insight to the development of RE-metal doped electrocatalysts for energy conversion.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chuanyi Xu,Guanrong Yang,Jie Li,Shanqing Zhang,Yueping Fang,Feng Peng,Shengsen Zhang,Rongliang Qiu
The persistence and wide dispersion of antibiotics have a severe impact on the ecological environment. Developing an effective method with universal applicability to remove pollutants is pretty necessary. Herein, a bimetallic oxides (Co 3 V 2 O 8 ) heterogeneous material was successfully prepared and used to activate the persulfate (PS) for purification of tetracycline (TC) wastewater. By exploring the reaction conditions and influencing factors, the removal rate of 50 mg⋅L -1 TC reached 87.1% by Co 3 V 2 O 8 /PS system, and the reaction rate constant was up to 0.0271 min −1 . As a highly efficient catalyst for the activation of PS, Co 3 V 2 O 8 /PS system produces radicals of SO 4 •− , •OH, •O 2 – and 1 O 2 in the reaction process due to the Co(II) and V(IV) exchange electrons with S 2 O 8 2- and O 2 . Simultaneously, the internal electron exchange occurs between Co(II)/Co(III) and V(IV)/V(V), which stabilizes the content of Co(II) and V(IV). This work provides a novel activator for PS activation to degrade contaminants and contributes to a better understanding of the PS activation mechanism by transition compound.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shijia Fan,Changjiang Zhou,Haoran Xu,Jingcai Xu,Hui-Min Wen,John Q. Xiao,Jun Hu
Giant magnetoresistance (GMR) effect exhibits high potential applications in ultrahigh density magnetic recording, magnetic sensors and electronic devices. Many methods were developed to improve the GMR, such as changing the diameters or content ratio of Co to Cu etc. In this work, we have successfully grown a new Co/Cu multilayered magnetic nanowires arrays (MNAs) with gradient diameter (GDMNAs). Very interestingly, we demonstrate much enhanced GMR in the GDMNAs. Moreover, it shows higher thermal stability simultaneously. This is a novel strategy to improve GMR. Generally, the diameter ( d ) and edge-to-edge separation ( s ) of MNAs play a significant role in determining the magnetic properties . If d < s , exchange interaction dominants. If d > s , dipolar interaction dominates. When we design a new GDMNAs with d < s at one end and d > s at the other, much better multilayered structures are observed on the larger end. Surprisingly, the magnetic anisotropy is found to be dominated by the portion of MNAs with d < s . Combining both properties in GDMNAs, we achieve the highest GMR value of 27% in reported Co/Cu MNAs. This design strategy not only reveals new interesting physics, which remains to be understood, but also useful to other applications based on MNAs.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yuxuan Feng,Shuhui Chen,Kaisheng Hua,Hui Li,Dong Jiang,Lujie Sheng,Dan Zhao,Jizhong Ren
Thermally rearranged(TR) polymers are usually prepared at an insert atmosphere and display high gas permeability, but their low gas selectivity results in high energy consumption. Thermal oxidation is an effective method to enhance the gas selectivity of microporous polymers. In this work, the effect of oxygen in the purge environment on imide-to-benzoxazole conversion and membrane structures was investigated. 1% oxygen content of the purge environment could restrain imide-to-benzoxazole conversion of 6FDA-DETDA/bisAPAF hydroxyl block polyimide(bHPI) membranes effectively, and oxygen induced the oxygen bridge formation, improving the gas selectivities of the resulting thermal-oxidative membranes with the increased oxygen content. Thermal-oxidative PBOCI membranes (TO-PBOCI) based on block poly(benzoxazole-co-imide)(PBOCI) precursor membranes were prepared to enhance gas separation performance of microporous polymers. The stable polybenzoxazole structures and microphase separation of polybenzoxazole blocks maintained membrane structures and the gas transport channels in the thermal-oxidative process at high temperature. Significantly, the remaining hydroxyl groups in PBOCI precursor membranes were beneficial for oxygen bridge formations of TO-PBOCI membranes, enhancing H 2 /CH 4 selectivity. As a result, the TO-PBOCI membranes treated at a high temperature kept high H 2 permeability and H 2 /CH 4 selectivity, surpassing the 2008 Robeson upper bound. The study about TO-PBOCI membranes promotes a better understanding of the polymeric materials and process development of microporous polymer membranes for hydrogen separation applications.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Intelligent Systems
·
2022
·Vol. 4
·期 6
·2200050
·
IF 7.298
Depeng Kong,Geng Yang,Gaoyang Pang,Zhiqiu Ye,Honghao Lv,Zhangwei Yu,Fei Wang,Xi Vincent Wang,Kaichen Xu,Huayong Yang
Robots equipped with bionic skins for enhancing the robot perception capability are increasingly deployed in wide applications ranging from healthcare to industry. Artificial intelligence algorithms that can provide bionic skins with efficient signal processing functions further accelerate the development of this trend. Inspired by the somatosensory processing hierarchy of humans, the bioinspired co-design of a tactile sensor and a deep learning-based algorithm is proposed herein, simplifying the sensor structure while providing computation-enhanced tactile sensing performance. The soft piezoresistive sensor, based on the carbon black-coated polyurethane sponge, offers a continuous sensing area. By utilizing a customized deep neural network (DNN), it can detect external tactile stimulus spatially continuously. Besides, a novel data augmentation method is developed based on the sensor's hexagonal structure that has a sixfold rotation symmetry. It can significantly enhance the generalization ability of the DNN model by enriching the collected training data with generated pseudo-data. The functionality of the sensor and the robustness of the proposed data augmentation strategy are verified by precisely recognizing five touch modalities, illustrating a well-generalized performance, and providing a promising application prospect in human–robot interaction.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 19
·11843-11852
·
IF 4.036
Qi Guo,Xinglong Hou,Wei Xu,Junli Liu
Ni3Co1/ELAC catalyst, prepared by the enzymatically hydrolyzed lignin activated carbon as a carrier and a 3 : 1 ratio content of nickel and cobalt, can selectively convert furfural to cyclopentanol (CPL) in aqueous solution. We used activated carbon prepared by the phosphoric acid method as the carrier, and investigated the effect of the carrier on the catalyst activity. The ratio of bimetal (Ni, Co) content and reaction conditions (reaction temperature, reaction time, initial H2 pressure) have also been investigated in the furfural hydrogenation. With the optimal Ni3Co1/ELAC catalyst, the conversion rate of furfural and the selectivity of CPL were 100% and 94.1%, respectively. In this process, some important catalysts were studied by XRD, XPS, ICP-AES, BET and TEM characterization. Through experimental results and other people's research, we deduced a reasonable reaction path and verified it by replacing the reaction substrate and solvents. Finally, the experiment proved that the formation of CPL by furfural required the occurrence of a rearrangement reaction and the participation of aqueous solution.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 8
·2550
·
IF 4.927
Lingzhi Liang,Xia Ren,Junyi Xu,Yurong Ma,Yunlin Xue,Tao Zhuang,Guisen Zhang
Olanzapine is a commonly used drug in the treatment of schizophrenia, but its clinical application has been restricted by metabolic-related side effects. In order to mitigate the weight gain side effects caused by olanzapine, other drugs with different targets were selected for combined use and evaluated in animal models of schizophrenia. SEP-363856 is a novel psychotropic agent which is under phase III clinical trials for schizophrenia treatment. The aim of the research was to evaluate whether co-administration of olanzapine and SEP-363856 exerts synergistic anti-schizophrenic effects in the apomorphine (APO)-induced climbing test, the MK-801-induced hyperactivity test, and the Morris water maze test, and therefore reduces the weight gain side effects induced by olanzapine. Through isobolographic analysis, the results showed a synergistic interaction in the climbing test; the experimental ED30(3 mg/kg) was significantly smaller (p< 0.05) than the theoretical ED30(5 mg/kg). Additionally, such potentiating effects appeared additive in the MK-801 challenge experiment. Co-treatment with an effective dose of olanzapine and a low dose of SEP-363856 reversed MK-801-induced cognitive impairment symptoms in mice. Moreover, combination treatment with olanzapine and SEP-363856 controls sustained weight gain in mice with chronic exposure to olanzapine. These results support further clinical trials to test the effectiveness of co-treatment of olanzapine and SEP-363856 for controlling symptoms and weight gain in patients with schizophrenia during antipsychotic treatments.Keywords:olanzapine;SEP-363856;schizophrenia;synergistic;side effects
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）