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Rare Metals 2024年第5期43卷 2093-2102页

作者： Bo Peng Zi-Hao Zhou Ping Xuan Jie Xu Lian-Bo Ma School of Materials Science and Engineering Anhui University ofTechnologyMa'anshan 243002China Anhui product quality supervision&inspection Research Institute Hefei 230051China

Mn-based layered oxides are among the most promising cathode materials for sodium-ion batteries owing to the advantages of abundance,environmenta friendliness,low cost and high specific capacity.P2 and O'3 are two representative structures of Mn-based layered ***,the P2 structure containing insufficien Na generally exhibits low initial charge capacity,while O'3structure with sufficient Na delivers high initial charge capacity but poor cycle *** study prepared a multitude of Na_(x)MnO_(2)(x=0.7,0.8,0.9)cathode materials with varying P2/O'3 ratios and further investigated their electrochemical *** optimized Na_(0.8)MnO_(2) comprising 69.9 wt%O'3 and 30.1 wt%P2 phase,exhibited relatively balanced specific capacity,Coulombic efficiency and cycle ***,it achieved a high specific capacity of 128.9 mAh·g^(-1) with an initia Coulombic efficiency of 98.2%in half-cell configuration The Na_(0.8)MnO_(2)//hard carbon full cell also achieved a high specific capacity of 126.7 mAh·g^(-1) with an initia Coulombic efficiency of 98.9%.Moreover,the capacity fading mechanism was revealed by combining in-situ and ex-situ X-ray *** findings of this study provide theoretical guidance for further modification design of Mnbased layered cathodes.

关键词： Sodium-ion batteries Cathode materials Mn-based layered oxides P2/0'3 composites

Corrosion behavior and magnetocaloric effect of FeNi(1J85) coated LaFe_(11.6)Si_(1.4)/Sn composites

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Journal of Rare Earths 2019年第6期37卷 633-637页

作者： Xi Zhao Ping Fang Yongbai Tang Yungui Chen Lingtong Zhou Huaqiang Guo College of Materials Science and Engineering Sichuan University Sichuan Institute of product quality supervision & inspection

The FeNi coated LaFe_(11.6)Si_(1.4)/Sn composites were prepared by hot pressing(HP). The microstructure,corrosion behavior and magnetocaloric effect(MCE) of FeNi coated LaFe_(11.6)Si_(1.4)/Sn composites were investigated systematically. The results show that the corrosion resistance of FeNi coated LaFe_(11.6)Si_(1.4)Sn composites is better than that of LaFe_(11.6)Si_(1.4)/Sn composites in deionized water. The maximum magnetic entropy change((-△S_M)^(max)) and relative cooling power(RCP) of FeNi coated LaFe_(11.6)Si_(1.4)/Sn composites are 13.30 J/(kg-K) and 146.25 J/kg, respectively, which are larger than that((-△S_M)^(max), 10.65 J/(kg·K) and RCP, 106.53 J/kg) of LaFe_(11.6)Si_(1.4)/Sn composites in a low magnetic field change of 2 T. FeNi coated LaFe_(11.6)Si_(1.4)/Sn composites possess a more negative slope. The improvement of magnetic properties is due to high permeability FeNi permalloy(1 J85) which improves the itinerant-electron metamagnetic(IEM) transition. So, the method of coating FeNi can provide a new idea for enhancing the corrosion resistance and magnetocaloric effect of La(Fe_xSi_(1-x))_(13)-based materials.

关键词： FeNi coated LaFe11.6Si1.4/Sn composites Hot pressing Corrosion resistance Magnetic entropy change Relative cooling power Itinerant-electron metamagnetic transition

Preparation of pistachio shell-based porous carbon and its adsorption performance for low concentration CO_(2)

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Particuology 2024年第12期95卷 103-114页

作者： Yuhua Zhang Yanmei Jin Song Li Hong Wu Huijuan Luo School of Chemistry and Materials Engineering Liupanshui Normal UniversityLiupanshuiChina Guizhou Province Key Laboratory of Clean Coal Utilization LiupanshuiChina Guizhou Coal product quality supervision&inspection Institute Liupanshui553001China

In this study,high-performance porous carbon for CO_(2) adsorption was synthesized from pistachio shells and modified with urea to enrich nitrogen content in the porous *** effects of activation temperature,KOH-to-carbon ratio,and urea addition on the pore structure and CO_(2) adsorption capacity of the porous carbon were *** was conducted using N2 adsorption-desorption isotherms,scanning electron microscopy(SEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and Fourier-transform infrared spectroscopy(FT-IR).Results showed that under preparation conditions of 700℃,KOH-to-carbon ratio of 2,and 15 wt%urea concentration,the synthesized GAC-15-2-700 porous carbon exhibited a maximum specific surface area of 1395 m^(2)/g,micropore volume of 0.505 cm^(3)/g,and N-5 peak area ratio of 65.57%.It achieved a CO_(2) adsorption capacity of 3.56 mmol/*** functional groups on the porous carbon primarily existed as pyridinic N(N-6),pyrrolic/pyridinic N(N-5),and quaternary N(N-Q),with the enriched micropores and high N-5 content being crucial for CO_(2) adsorption.

关键词： Pistachio shells Porous carbon CO_(2)adsorption

Characterization and biodegradation kinetics of a new cold-adapted carbamazepine-degrading bacterium, Pseudomonas sp. CBZ-4

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Journal of Environmental Sciences 2013年第11期25卷 2281-2290页

作者： Ang Li Rui Cai Di Cui Tian Qiu Changlong Pang Jixian Yang Fang Ma Nanqi Ren State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology National supervision and inspection Center of Environmental Protection Equipment quality Yixing Urban Supervision andInspection Administration of Product Quality

Carbamazepine is frequently detected in waters and hardly eliminated during conventional wastewater treatment processes due to its complicated chemical structure and resistance to biodegradation. A carbamazepine-degrading bacterium named CBZ-4 was isolated at a low temperature （10℃） from activated sludge in a municipal wastewater treatment plant. Strain CBZ-4, which can use carbamazepine as its sole source of carbon and energy, was identified as Pseudomonas sp. by the 16S rRNA gene sequence. The composition and percentage of fatty acids, which can reveal the cold-adaptation mechanism of strain CBZ-4, were determined. Strain CBZ-4 can effectively degrade carbamazepine at optimal conditions： pH 7.0, 10℃, 150 r/min rotation speed, and 13% inoculation volume. The average removal rate of carbamazepine was 46.6% after 144 hr of incubation. The biodegradation kinetics of carbamazepine by CBZ-4 was fitted via the Monod model. Vmax and Ks were found to be 0.0094 hr^-1 and 32.5 mg/L, respectively.

关键词： carbamazepine low temperatures biodegradation kinetics Pseudomonas sp.

Synthesis of comb bipolymers and their pour point depressing properties

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Petroleum Science 2014年第1期11卷 155-160页

作者： Zhang Changqiao Gao Congcong Gao Fengfeng Wang Jian Zhang Dawei Wang Yan Xu Dawei School of Chemistry and Chemical Engineering Shandong University Shandong quality Certification Centre Shandong product quality supervision & inspection Research Institute

A bipolymer maleic anhydride-methyl acrylate （MAMA） was synthesized from maleic anhydride and methyl acrylate based on molecular *** further reacted with oleylamine or octadecyl alcohol to generate two comb polymers called Oleamide-MAMA （NMAMA） and OctadecanolMAMA （OMAMA）,*** structure of both the polymers was confirmed by their infrared spectral analysis （IR）,gel permeation chromatography analysis （GPC） and differential scanning calorimeter （DSC）.Moreover,the pour point depressing （PPD） properties of these comb polymers were examined *** results showed that besides the molecular weight and concentration of the polymers,the length of side chains and the number of functional groups also had great influence on the pour point depressing *** π bonds and hydrogen bonds between depressants were the key factors for improving the pour point depressing *** results suggest that both OMAMA and NMAMA are potential pour point depressants for industry.

关键词： Maleic anhydride comb polymers pour point depressant hydrogen bonds molecular simulation

COMBINED EFFECT OF MODIFIED ZEOLITE 13X AND β-NUCLEATING AGENT ON IMPROVING β-CRYSTAL CONTENT AND TOUGHENING POLYPROPYLENE RANDOM COPOLYMER

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Chinese Journal of Polymer Science 2013年第11期31卷 1563-1578页

作者： Jin-hua Leng Heng Liu 何波兵 Bin Yang Xian Chen Qing-quan Qin Polymer Physics and Chemistry College of ChemistrySichuan University Chengdu product quality supervision and inspection Institute Kaixian Chenjia Middle School

Although addition of β-nucleating agent directly into homo-polypropylene （PPH） is a useful method to improve ,β-crystal content and toughen PPH, polypropylene random copolymer （PPR） makes this method powerless due to its random structure and low crystallinity. In this study, the β-nucleated PPR with high β-crystal content was prepared by a novel high effective β-nucleating system which consists of β-nucleation agent （TMB-5） and modified zeolite 13X （M13X）. It was found that M13X and TMB-5 had a synergistic influence on improving β-crystal content and toughening PPR. The content of β-crystal in PPR/M13X/TMB-5 was significantly larger than the sum of that in PPR/M13X and PPR/TMB-5. Besides, fracture behavior, phase morphology and relaxation of matrix chain segments were also investigated. The results showed that M13X and TMB-5 improved the mobility of amorphous chain segments at low temperature and contributed to much energy dissipation. This work provides a powerful method to modify PPR.

关键词： Polypropylene random copolymer Zeolite fl-nucleating agent Crystallization Toughness.

Mesoporous amorphous FeOOH-encapsulated BiO_(2–x) photocatalyst with harnessing broad spectrum toward activation of persulfate for tetracycline degradation

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Chinese Journal of Chemical Engineering 2024年第7期71卷 235-248页

作者： Pengfei Wu Zhaolong Liu Li Wu Yingkun Zhang Bing Wang Zhanghao Cheng Wenquan Cui Xiangyang Lv Qingling Liu Tianjin Key Laboratory of Indoor Air Environmental quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300350China hebei Pollution Control Technology Innovation Center of Steel and Coking Industry Department of Environmental and Chemical EngineeringHebei College of Industry and TechnologyShijiazhuang 050091China hebei Key Laboratory of Environmental Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshan 063210China hebei academy of product quality supervision&inspection Shijiazhuang 050227China

With the growing concern about the water environment,the advanced oxidation process of persulfate activation assisted by photocatalysis has attracted considerable attention to decompose dissolved organic *** this work,to overcome the drawbacks of the photocatalytic activity reduction caused by the photo-corrosion of non-stoichiometric BiO_(2–x),a novel material with amorphous FeOOH in situ grown on layered BiO_(2–x) to form a core-shell structure similar to popcorn chicken-like morphology was produced in two simple and environmentally beneficial *** a series of degradation activity tests of hybrid materials under different conditions,the as-prepared materials exhibited remarkable degradation activity and stability toward tetracycline in the FeOOH@BiO_(2–x)/Vis/PS system due to the synergism of photocatalysis and persulfate *** results of XRD,SEM,TEM,XPS,FTIR,and BET show that the loading of FeOOH increases the specific surface area and active sites appreciably;the heterogeneous structure formed by FeOOH and BiO_(2–x) is more favorable to the effective separation of photogenerated *** optimal degradation conditions were at a catalyst addition of 0.7 g·L^(–1),a persulfate concentration of 1.0 g·L^(–1),and an initial pH of 4.5,at which the degradation rate could reach 94.7%after 90 *** influence of typical inorganic anions on degradation was also *** studies and radical quenching experiments revealed that·OH,SO_(4)^(-)·,and·O_(2)^(-)were the principal active species generated during the degradation of *** results of the 1,10-phenanthroline approach proved that the effect of dissolved iron ions on the tetracycline degradation was limited,and the interfacial reaction that occurs on the active sites on the material's surface was a critical *** work provides a novel method for producing efficient broad-spectrum Bismuth-based composite photocatalysts and photocatalytic-activated persulfate synerg

关键词： Amorphous FeOOH BiO_(2–x) Activated persulfate Photocatalytic Tetracycline degradation

Luminescence properties of BaAl_(12)O_(19):Tb,Ce and energy transfer between Ce^(3+),Tb^(3+)

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Journal of Rare Earths 2010年第S1期28卷 229-231页

作者：肖林久谢颖贺明睿陈永杰李文泽于维珂 Shenyang University of Chemical Technology Key Laboratory of Rare-Earth Chemistry and Applying Liaoning Province Shenyang supervision and inspection Institute for product quality

Ba0.9-ySryAl12O19:Eu0.1 phosphors were prepared by sol-gel technique,the crystalline structures of samples characterized by XRD,and the luminescence properties were *** influence of crystallographic positions on the luminescent properties of Sr2+-doped BaAl12O19:Eu was investigated in *** results indicated that the crystal lattice of BaAl12O19:Eu was not influenced by the Sr2+ and doping Sr2+ in BaAl12O19:Eu enhanced the luminescent properties of the phosphors at the proper concentration of Sr2+.With the increasing of concentration of Sr2+ doped in BaAl12O19:Eu,the relative luminescent intensity of Ba0.9-ySryAl12O19:Eu0.1 strengthened and blue-shifted.

关键词： phosphors luminescence properties Sr2+ Eu2+ rare earths

Effects of Sr^(2+) on structure and luminescent properties of BaAl_(12)O_(19):Eu phosphors

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Journal of Rare Earths 2010年第S1期28卷 225-228页

作者：谢颖肖林久贺明睿陈永杰李文泽于维珂 Shenyang University of Chemical Technology Key Laboratory of Rare-Earth Chemistry and Applying Liaoning Province Shenyang supervision and inspection Institute for product quality

BaAl12O19:Tb,Ce phosphors were prepared by sol-gel technique,the crystalline structures of samples characterized by XRD,and the luminescence properties and energy transfer between Ce3+ and Tb3+ were *** results indicated that the emission intensity and the excitation wavelength range of Tb3+ increased when Ce3+ was *** demonstrated that the Ce3+ added in the BaAl12O19:Tb could deliver energy to Tb3+,and Ce3+ was not luminous by *** relative emission intensity of Tb3+ at wavelength of 548 nm was the strongest by Tb3+/Ce3+ ratio of 2:1,when excited at 310 nm,which was the characteristic adsorption wavelength of Ce3+.

关键词： phosphors luminescence properties energy transfer Tb3+ Ce3+ rare earths

Effect of information delay on string stability of platoon of automated vehicles under typical information frameworks

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Journal of Central South University 2010年第6期17卷 1271-1278页

作者：肖凌云高峰 School of Transportation Science and Engineering Beijing University of Aeronautics and Astronautics Defective product Administrative Center General Administration of Quality SupervisionInspection and Quarantine of China

The effect of the information delay, which was caused by thc naturc of the distance sensors and wireless communication systems, on the string stability of platoon of automated vehicles was studied. The longitudinal vehicle dynamics model was built by taking the information delay into consideration, and three typical information frameworks, i.e., leader-predecessor framework （LPF）, multiple-predecessors framework （MPF） and predecessor-successor framework （PSF）, were defined and their related spacing error dynamics models in frequency domain were proposed. The string stability of platoon of automated vehicles was analyzed for the LPF, MPF and PSF, respectively. Meanwhile, the related sufficient string stable conditions were also obtained. The results demonstrate that the string stability can be guaranteed tbr the LPF and PSF with considering the information delay, but the ranges of the control gains of the control laws are smaller than those without considering the information delay. For the MPF, the ＂weak＂ string stability, which can be guaranteed without considering the information delay, cannot be obtained with considering the information delay. The comparative simulations further demonstrate that the LPF shows better string stability, but the PSF shows better string scalable performance.

关键词： string stability information delay information framework automated vehicle intelligent transportation system