SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
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IF 3.927
Binglu Deng,Hanjin Luo,Zhongqing Jiang,Zhong-Jie Jiang,Meilin Liu
A simple co-polymerization method has been employed to prepare polysilicic-zirconium (PSZr), consisting of chemical species of ZrSi 24 O 50 , ZrSiO 4 , and Zr 5 Si 3 . The obtained PSZr is found to be highly active as the coagulant for the purification of the raw water and humic acid wastewater. The performance of PSZr on the wastewater purification is greatly dependent upon the synthetic temperature of PSZr, and the mole ratio of Si:Zr, and the basicity of the PSZr. It shows that PSZr synthesized at the temperature of 20–25 °C with the mass fraction of polysilicic acid of 1.5%, the mole ratio of Si:Zr of 1:1, and a basicity of 0.25, is relatively more efficient for water purification and could achieve the UV 254 (Ultraviolet wavelength less than 254 nm) and total organic carbon removals of 81.23% and 66.85% and residual turbidity of 0.86 NUT in the raw water, and the UV 254 and TOC removals of 99.20% and 74.21% in simulated humic acid wastewater, respectively. These results clearly demonstrate that PSZr could be used as the coagulant for the wastewater treatments.
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高影响因子
POLYMER INTERNATIONAL
·
2024
·
IF 2.9
Guoqiang Wang,Xiang Chi
Poly[(3-hydroxybutyrate)- co -(4-hydroxybutyrate)] (P34HB), poly[(butylene succinate)- co -(butylene furandicarboxylate)] (PBSF) and poly(vinyl acetate) (PVAc) were melt-blended to prepare P34HB/PBSF/PVAc blends with improved ductility. The thermal properties, mechanical properties, rheological properties and morphology of the blends were systematically studied. The addition of PBSF promoted the melt crystallization of P34HB. The temperatures at 5% weight loss of the blends were higher than that of P34HB. The surface of the blends was investigated using scanning electron microscopy. The surface of P34HB was very smooth, but the surfaces of the blends were rough. PVAc can increase the compatibility between P34HB and PBSF. Compared with P34HB, the elongation at break of the blends was increased to 219.1%. © 2024 Society of Industrial Chemistry.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Feng Zhang,Yu Lei,Jiali Liu,Guang Li,Yangcheng Xie,Lingguang Yi,Tianjing Wu,Xianyou Wang
The construction of suitable heterostructures in materials can tune the Fermi energy levels and electron transport rates of materials to achieve attractive oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) properties. In this study, a catalyst anchored in nitrogen-doped carbon nanowires (NCNW) with a heterogeneous interface of Co and CoSe is constructed to realize high-performance ORR and OER bifunctional catalysis. These Co and CoSe heterostructure interfaces can optimize the adsorption of intermediates. The Co/CoSe@NCNW catalyst performs excellent ORR catalytic activity (E 1/2 = 0.89 V), and good OER activity (potential at 10 mA/cm 2 , E j = 10 = 1.55 V). More importantly, the material shows excellent performance in rechargeable zinc-air batteries (ZABs). The open-circuit voltages of 1.47 and 1.50 V and the peak power densities of 122.56 and 74.49 mW/cm 2 in liquid and solid electrolytes, respectively, are superior to those of the ZABs prepared from noble metals. Consequently, the construction of heterogeneous structures can convincingly boost the commercialization of rechargeable ZABs, and be extended to other fields involving ORR and OER.
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MOLECULES
·
2025
·Vol. 30
·期 5
·1133
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IF 4.6
Yuansong Zhou,Fengyu Gao,Lei Yi,Junyi Wang,Honghong Yi,Xiaolong Tang
In an O 2 -containing environment, achieving efficient selective catalytic reduction of nitrogen oxides (NOx) by carbon monoxide (CO) using non-noble metal catalysts remains a formidable challenge. To balance the catalytic oxidation of CO and the catalytic reduction of NOx, we need to develop a catalyst with strong reductibility and weak oxidizability for the CO selective catalytic reduction of NOx (CO-SCR) reaction in the presence of O 2 . In this study, we synthesized the CoCeOx-PVP catalyst via a coprecipitation method and employed various characterization techniques, including BET, SEM, XRD, Raman, XPS, H 2 -TPR, and O 2 -TPD. The analysis results indicate that the addition of polyvinylpyrrolidone (PVP) alters the surface structure of the catalyst, increases the particle size, and enhances the concentration of surface oxygen vacancies. These structural effects facilitate electron circulation and accelerate the migration of oxygen species, thereby improving the catalytic reduction performance of the catalyst and increasing the conversion rate of NOx. At 250 °C and with 5 vol% O 2 , the conversion rates of NOx and CO can attain 98% and 96%, respectively, accompanied by a remarkable N 2 selectivity of 99%. Following a sustained reaction period of 6 h, the conversion efficiencies of both NOx and CO remain above 95%. However, during extended testing periods, as the oxygen vacancies are progressively occupied by O 2 , the oxygen vacancies generated through the reduction of NO with CO fall short of sustaining the CO-SCR reaction over the long haul. Subsequently, the oxidation reactions of NO and CO come to dominate, resulting in a decline in the NOx conversion rate. Notably, the CO conversion rate still maintains 100% at this point. Based on the results of in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) experiments, we proposed a reaction mechanism for the CO-SCR process over the CoCeOx-PVP catalyst under O 2 -containing conditions. This study provides an effective strategy for the application of non-noble metal catalysts in the field of CO-SCR. Although maintaining long-term activity of the catalyst remains a challenge in the presence of O 2 , the catalyst in this study exhibits a slower deactivation rate compared to traditional non-noble metal catalysts.
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PubMed
高影响因子
Catalysis Science & Technology
·
2024
·Vol. 14
·期 5
·1167-1180
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IF 4.4
Jiahui Xu,Xianlang Chen,Jia-qi Bai,Zhengan Miao,Yuan Tan,Nannan Zhan,Huangfei Liu,Mei Ma,Mengdie Cai,Qin Cheng,Song Sun
The selective hydrogenation of halonitrobenzenes (HNBs) to haloanilines (HANs) is an efficient method to prepare key intermediates in the fine chemical industry. It is still a challenge to develop non-noble metal-based heterogeneous hydrogenation catalysts to achieve high activity and selectivity for this reaction. Herein, we reported a N, S co-doped mesoporous carbon supported Co catalyst for hydrogenation of HNBs, the prepared 5%Co/NSPC-800 catalyst showed superior catalytic performance with a TOFs of 203 h−1 and >99.9% selectivity to p-chloroaniline (p-CAN), and it also exhibited wide substrate applicability and can be reused at least 4 times. Furthermore, the reaction mechanism of p-CNB hydrogenation over 5%Co/NSPC-800 was proposed on the basis of kinetic studies, spectroscopic studies, and DFT calculations. The hydrogenation of p-CNB over 5%Co/NSPC-800 followed the condensation route, and Co0 and Co–Nx were the main active sites for this reaction.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Huijuan Liu,Yonglei Xing,Jingyao Duan,Xiaoyong Jin,Gang Ni
This research designed a copper and nitrogen co-doped porous carbon nanosheets (Cu–N/C) and systematically explored its efficient application in peroxymonosulfate (PMS) activation. The Cu–N/C catalyst, prepared using a multi-step anchoring strategy, exhibited remarkable catalytic activity, benefiting from its large specific surface area and uniformly distributed Cu–N coordination structure. This structure notably improved PMS activation, enabling the effective breakdown of organic pollutants like phenol. Experimental results demonstrated that 0.5 mmol of Cu–N/C catalyst achieved complete phenol removal in the PMS system, maintaining strong catalytic performance over a broad pH range. Through radical quenching experiments and EPR analysis, superoxide radicals were predominant in the reaction, while non-radical mechanisms, such as high-valence copper species and direct electron transfer, contributed to pollutant degradation. Additionally, pyrrolic nitrogen sites and surface hydroxyl groups were identified as key active sites, effectively adsorbing and activating PMS. The introduction of copper-induced defects further enhanced PMS activation, while pyrrolic nitrogen sites adsorbed pollutants, improving phenol degradation efficiency. Three-dimensional fluorescence spectroscopy and gas chromatography-mass spectrometry analysis identified hydroquinone, catechol, resorcinol, and p-benzoquinone as intermediate products during phenol degradation. The catalytic performance was restored through thermal treatment. This research provides new insights and theoretical support for PMS activation and organic pollutant degradation.
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CHEMICO-BIOLOGICAL INTERACTIONS
·
2024
·
IF 4.7
Xiao-yu Xu,Zhe-yan Zhang,Xiao-dan Zhang,Jian-chao Luo,Yun-shan Zhong,Le-hao Jin,Da-peng Dai,Jian-chang Qian
To study the effects of metabolic enzyme activity inhibition and genetic polymorphisms on the pharmacokinetics and pharmacodynamics of rivaroxaban, we established an in vitro enzymatic reaction system to screen for inhibitors, and used the UPLC-MS/MS method to detect the levels of rivaroxaban and its metabolite M2-1. Additionally, in vivo pharmacokinetic-pharmacodynamic studies were conducted using Sprague-Dawley rats. Human recombinant CYP2J2 baculosomes were prepared using a baculovirus-insect expression system to investigate the impact of genetic polymorphisms on rivaroxaban metabolism through enzyme kinetics methods. The results demonstrated that acid-suppressing drugs strongly inhibited the metabolism of rivaroxaban in vitro . Among them, vonoprazan significantly increased the systemic exposure of rivaroxaban in vivo , while also prolonging prothrombin time, likely due to the competitive binding of vonoprazan and rivaroxaban to CYP2J2. Moreover, the genetic polymorphisms of CYP2J2 determined the metabolic characteristics of rivaroxaban and the inhibitory potency of vonoprazan. Overall, our findings suggest that vonoprazan-induced inhibition of CYP2J2 activity can affect the pharmacokinetics and pharmacodynamics of rivaroxaban, with the extent of inhibition determined by the genetic polymorphism of CYP2J2. These insights have important implications for the precise management of rivaroxaban in humans.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Suqiong Xu,Peng Liao,Jiawei Zhu,Wei Ling,Xianke Zhang,Jujun Yuan,Chuicai Rong,Xiaoqing Liu,Zuzhou Xiong
Herein, an efficient one-dimensional (1D) N-doped Co/C nanotube absorber was designed by a cobalt source and solvent ratio comodulation strategy. First, we explored the influences of different cobalt sources (CoCl2, Co(OAc)2, Co(NO3)2, and CoSO4) on the morphology and microwave absorption (MA) property, which showed that CoCl2 facilitated the formation of nanotubes with a relatively uniform diameter and length. Notably, the Co/C nanotubes displayed an ultrawide effective absorption bandwidth (EAB) of 6.885 GHz at 2.2 mm when the filling ratio was only 8 wt %. Then, by adjusting the solvent ratio of isopropanol (IPA) and water, Co/C showed a strong absorption of −44.51 dB with an EAB of 5.44 GHz at 2.35 mm. The outstanding MA performance is ascribed to the synergistic effect of dielectric and magnetic components, which is conducive to optimizing the impedance matching, thus broadening the EAB. In addition, the 1D nanostructure is good for constructing three-dimensional (3D) conductive networks and enhancing conductive loss. Since Co nanoparticles are wrapped in carbon nanotubes (CNTs), the confinement effect can effectively prevent the agglomeration of ferromagnetic nanoparticles, adjusting the MA performance. It is worth mentioning that the maximum Radar cross section (RCS) value of Co/C can be reduced by 28.8 dB m2. Furthermore, the RCS values are all lower than −10 dB m2 from −90 to 90° and the minimum RCS value can reach −46.8 dB m2. This work provides a strategy for designing lightweight MA absorbers with strong RL and ultrawide EAB.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhengyan Hao,Yong Xu,Xijia Yang,Xuesong Li,Yang Gao,Liying Wang,Wei Lü
Zinc-ion hybrid supercapacitors (ZIHSCs) are emerging as a promising energy storage device, combining the benefits of traditional batteries and capacitors, including high energy density, incredible power density, a wide voltage window, and excellent capacity retention. In this study, a Cu²⁺ and Zn²⁺ co-doped needle-like tunnel-structured α-MnO₂ material is proposed as the cathode (Cu-Zn-MnO₂@CC), which is grown on an acid-treated flexible carbon cloth substrate using a simple hydrothermal synthesis method. Along with an anode made of super-mesoporous activated carbon derived from waste rice husks (ACrh@CC). The synergistic effect of the co-doping stabilizes the nanowire tunnel structure and provides more active sites. As a result, the Cu-Zn-MnO₂@CC//2 M ZnSO₄//ACrh@CC ZIHSC achieves an ultrahigh specific capacitance of 1241.85 mF cm⁻² at 1 mA cm⁻², representing an improvement of more than 50 % in performance compared to with conventional MnO₂@CC ZIHSC. And a maximum areal energy density of 689.9 μWh cm⁻² at a power density of 1 mW cm⁻². After 20,000 cycles, it retains 86.35 % of its initial capacitance. Furthermore, the assembled flexible device achieves a specific capacitance of 1070.21 mF cm⁻² at 1 mA cm⁻². This device can provide long-term power for electronic devices such as digital watches and timers. The study offers crucial understanding regarding structure of ZIHSC electrode materials and opens up possibilities for their potential applications.
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高影响因子
Energy Technology
·
2024
·
IF 3.6
Yongchao Hao,Ling Wang,Shuling Cheng,Huiya Cheng,Qianyun He,Lizhi Yi
Developing an efficient oxygen evolution reaction (OER) catalyst is the footstone of many electrochemical energy conversion devices. Herein, a cobalt–manganese bimetallic metal–organic framework (MOF) is developed as an efficient OER catalyst (denoted as Co 3 Mn 1 BDC). The Co 3 Mn 1 BDC nanosheets demonstrate advantages in specific surface area, pore size distribution comparing with monometallic Co BDC and Mn BDC. The performance investigations demonstrate that the doping of Mn in Co-based MOFs facilitates the electrochemical area, charge transfer efficiency, reaction kinetics, and turnover frequency. As a consequence, the Co 3 Mn 1 BDC exhibits a low overpotential of 289 mV at current of 10 mA cm −2 and a favorable Tafel slope of 56.8 mV dec −1 on glassy carbon electrode, which is better than IrO 2 . When the catalyst is loaded on Ni foam, the overpotential and Tafel slope are further decreased to 231 mV and 50.8 mV dec −1 . Moreover, the Raman spectrum confirms that the Co 3 Mn 1 BDC can be transformed into active CoOOH, suggesting the bright prospect in electrocatalysis devices as “precatalyst”.
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MOLECULES
·
2024
·Vol. 29
·期 10
·2286
·
IF 4.2
Peilin Wei,Yu Duan,Chen Wang,Panpan Sun,Na Sun
The organization of modifiable and functional building components into various superstructures is of great interest due to their broad applications. Supramolecular self-assembly, based on rationally designed building blocks and appropriately utilized driving forces, is a promising and widely used strategy for constructing superstructures with well-defined nanostructures and diverse morphologies across multiple length scales. In this study, two homogeneous organohydrogels with distinct appearances were constructed by simply mixing polyoxometalate (phosphomolybdic acid, HPMo) and a double-tailed zwitterionic quaternary ammonium amphiphile in a binary solvent of water and dimethyl sulfoxide (DMSO). The delicate balance between electrostatic attraction and repulsion of anionic HPMo clusters and zwitterionic structures drove them to co-assemble into homogeneous organohydrogels with diverse microstructures. Notably, the morphologies of the organohydrogels, including unilamellar vesicles, onion-like vesicles, and spherical aggregates, can be controlled by adjusting the ionic interactions between the zwitterionic amphiphiles and phosphomolybdic acid clusters. Furthermore, we observed an organohydrogel fabricated with densely stacked onion-like structures (multilamellar vesicles) consisting of more than a dozen layers at certain proportions. Additionally, the relationships between the self-assembled architectures and the intermolecular interactions among the polyoxometalate, zwitterionic amphiphile, and solvent molecules were elucidated. This study offers valuable insights into the mechanisms of polyoxometalate-zwitterionic amphiphile co-assembly, which are essential for the development of materials with specific structures and emerging functionalities.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Qian Wang,Changchao Zhou,Li Shen,Eryue Song,Yu Yang,Haiqian Lian,Rujing Hou,Yichang Pan
The pervaporation (PV) technology is attractive for azeotrope component separation of the MeOH/MTBE mixture due to the reduced energy and cost relative to the traditional ternary distillation process. However, the membrane separation performance is largely affected by its microstructure including pore size and shape as well as its surface properties such as hydrophilicity. Herein, we report a Co-gallate MOF membrane that features preferential adsorption and diffusion of methanol (MeOH) relative to the methyl tert -butyl ether (MTBE) molecules during the PV separation process. The high-quality Co-gallate MOF membrane has been prepared by introducing a regulator of KOH. The MeOH flux of the Co-gallate MOF membrane was 0.565 kg m −2 h −1 and the separation factor was up to 721 at 15 wt% MeOH/MTBE feed composition. It is worth noting that the separation performance exceeds most of the reported membrane materials for MeOH/MTBE separation in the PV process. Furthermore, the separation performance of the Co-gallate MOF membrane for MeOH/MTBE mixtures remained almost unchanged over 70 h, indicating the reliable long-term stability of the membrane. Thus, the Co-gallate MOF membrane demonstrated a potential practical application for MeOH/MTBE separation.
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