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A tri-vanadium-capped Keggin phosphomolybdate: synthesis, characterization, photocatalytic and bifunctional electrocatalytic properties

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Tungsten 2022年第2期4卷 99-108页

作者： Feng-Rui Li Tuo Ji Wei-Lin Chen Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Department of Chemistry Northeast Normal UniversityChangchun130024China

A purely inorganic tri-vanadium-capped Keggin phosphomolybdate[Na_(3)PMo_(12)V_(3)O_(43)]·4H_(2)O(compound 1)has been synthesized by hydrothermal means and characterized via powder X-ray diffraction,infrared spectrum,thermogravimetric analysis,single-crystal X-ray diffraction,scanning electron microscope,ultraviolet–visible absorption spectroscopy,ultraviolet–visible diffuse reflection spectra as well as electrochemical cyclic voltammetry *** structure analysis displays that compound 1 is a symmetric tri-vanadium-capped cluster through six half occupancy{VO_(5)}*** 1 remains a purely inorganic Keggin phosphomolybdate,which presents electrocatalytic properties for the oxidization of ascorbic acid and reduction of H_(2)O_(2).At the same time,it possesses high-efficiency degradation capability for typical methylene blue,Rhodamine B and methyl orange dyes under ultraviolet light.

关键词： Polyoxometalates Hydrothermal method Photocatalysis Electrocatalysis

Implanting iodine-125 seeds into rat dorsal root ganglion for neuropathic pain: neuronal microdamage without impacting hind limb motion

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Neural Regeneration Research 2014年第12期9卷 1204-1209页

作者： Ling Jiao Tengda Zhang Huixing Wang Wenyi Zhang Saijun Fan Xiaodong Huo Baosen Zheng Wenting Ma Institute of Radiation Medicine Chinese Academy of Medical Sciences Second Affiliated Hospital of Tianjin Medical University

The use of iodine-125 （L251） in cancer treatment has been shown to relieve patients＇ pain. Consid- ering dorsal root ganglia are critical for neural transmission between the peripheral and central nervous systems, we assumed that 125I could be implanted into rat dorsal root ganglia to provide relief for neuropathic pain. 125I seeds with different radioactivity （0, 14.8, 29.6 MBq） were im- planted separately through L4-5 and L5-6 intervertebral foramen into the vicinity of the L5 dorsal root ganglion, von Frey hair results demonstrated the mechanical pain threshold was elevated after implanting 125I seeds from the high radioactivity group. Transmission electron microscopy revealed that nuclear membrane shrinkage, nucleolar margination, widespread mitochondrial swelling, partial vacuolization, lysosome increase, and partial endoplasmic reticulum dilation were visible at 1,440 hours in the low radioactivity group and at 336 hours in the high radio- activity group. Abundant nuclear membrane shrinkage, partial fuzzy nuclear membrane and endoplasmic reticulum necrosis were observed at 1,440 hours in the high radioactivity group. No significant difference in combined behavioral scores was detected between preoperation and postoperation in the low and high radioactivity groups. These results suggested that the mechan- ical pain threshold was elevated after implanting 125I seeds without influencing motor functions of the hind limb, although cell injury was present.

关键词： nerve regeneration iodine-125 analgesia radioactive seeds ultrastructure pain threshold dorsal root ganglion injury neuropathic pain neural regeneration

Synthesis, Structure and Magnetic Properties of a 3D Interpentrating Network Based on 4-Imidazol-1-yl-benzoic Acid and Azide Ligands

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chinese Journal of Structural Chemistry 2015年第10期34卷 1565-1570页

作者：贾宏云弓亚琼张树海 Industry and Ecology Institute North University of China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

A new CoⅡ coordination complex, namely [Co（iba）（N3）]n, was prepared by the hydrothermal reaction of Co（NO3）2·6H2O with Na N3 in the presence of 4-imidazol-1-yl-benzoic acid（Hiba）. Compound 1 crystallizes in orthorhombic, space group Pbca with a = 6.782（2）, b = 19.93（5）, c = 15.96（4） A, V = 2157.2（3） A3, Z = 8, C10H7O2N5 Co, Mr = 228.14, Dc = 1.774 g/cm^3, F（000） = 1160, μ（Mo Kα） = 1.592 mm-1. The final R and w R are 0.0706 and 0.1990 for 1160 observed reflections with I 2σ（I）. Each iba- coordinates in a bidentate fashion with two CoⅡ ions and every two adjacent CoⅡ ions were connected by one azido ion to form a 3D two-fold interpenetrating framework. Thermogravimeteric analysis（TGA） of compound 1 reveals that the loss of moiety of azido ion occurs from 200 oC to about 260 oC and the framework begins to decompose above 300 oC. The magnetic property investigation of compound 1 demonstrates that it displays ferromagnetic coupling between CoⅡ ions.

关键词： solvothermal cobalt crystal structure magnetic properties

Synthesis and Characterization of a Novel Grid Coordination Polymer Network Generated from Unsymmetrically Bridging Ligand

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chinese Journal of Structural Chemistry 2015年第12期34卷 1857-1861页

作者：弓亚琼贾宏云张树海 Chemical Industry and Ecology Institute North University of China

Self-assembly of pyta （pyta = N-（4-pyridylmethyl） triazole） with Ag（I） center by layer-separating diffusion method at ambient temperature gives rise to a new supramolecular [Ag（p-pyta）CIO4]n which has been characterized by single-crystal X-ray diffraction. The polymer crystallizes in a hexagonal space group R-3 with a = 22.456（7）, b = 22.456（7）, c = 14.570（1） A, V= 6363（6） A3, Z = 4, C36H36Ag4.5C14.5N18O18, Mr = 1653.77, Dc = 1.726 g/cm3, F（000） = 3240, μ（MoKa） = 1.625 mm^-1, the final R = 0.0449 and wR = 0.1397 for 2744 observed reflections with I〉2σ（I）.

关键词： silver(I) flexible crystal structure

Triazole backbone ligand in an unprecedented efficient manganese catalyst for use in transfer hydrogenation

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Science China Chemistry 2023年第7期66卷 2028-2036页

作者： Qianqian Liang Chunyan Zhang Fangchao Wang Zhong Luo Wei Yang Guohui Zhang Ding Ding Guoying Zhang State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China College of Ecology Taiyuan University of TechnologyTaiyuan 030001China University of chinese Academy of Sciences Beijing 100049China China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China

Noble metal catalysts are generally expensive,and thus,abundant 3d metals recently received significant attention as catalysts in catalytic *** catalysts are widely applied in transfer hydrogenations,but the reported catalyst loadings remain up to three orders of magnitude higher than noble ***,catalyst consumption should be overcome before 3d metal catalytic systems may be utilized practically in ***,a catalytic system based on novel,scalable triazole N5-ligands coordinated to Mn is presented for use in transfer *** on pre-activation via dehydrohalogenation,an unprecedented,efficient catalytic system operating via synergistic H-bond auxiliary activation was *** Mn catalysts are practical at metal concentrations 0.0001 mol%,generating alcohol with turnover number(TON)up to 857,200,thus approaching loadings more conventionally observed in precious-metal-based ***,using this protocol,several pharmaceuticals may be easily synthesized in one pot.

关键词： manganese catalyst triazoles ligand transfer hydrogenation ketones alcohols

Methyl Orange removal by a novel PEI-AuNPs-hemin nanocomposite

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Journal of Environmental Sciences 2017年第3期29卷 278-283页

作者： Weiwen Hu Xuehua Yu Qiong Hu Jinming Kon Lianzhi Li Xueji Zhan School of Environmental and Biological Engineering Nanjing University of Science&TechnologyNanjing 210094China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000China Chemistry Department College of Arts and SciencesUniversity of South FloridaFL 33620-4202USA

A novel poly（ethyleneimine）/Au nanoparticles/hemin nanocomposite （PEI-AuNPs-Hemin） acting for Methyl Orange （MO） removal has been synthesized. PEI-AuNPs was prepared firstly and it was then linked to heroin through the coupling between carboxyl groups in hemin and amino groups in PEI without the activation of carboxyl groups. The high reactivity and stability of AuNPs contributed greatly in the formation of the amido bonds in the nanocomposite. Fourier transform infrared spectroscopy, transmission electron microscopy and UV-visible spectroscopy were used to characterize the PEI-AuNPs-Hemin. Results show that PEI-AuNPs-Hemin has strong adsorption for MO. Adsorption and degradation experiments were carried out at different pHs, nanocomposite concentrations and UV irradiation times. Removal of MO in acidic solutions was more effective than in basic solutions. The real-time study showed that the MO degradation with the nanocom- posite under UV irradiation was a fast process. In addition, the photocatalytic degradation mechanism was proposed. The study suggests that the PEI-AuNPs-Hemin may have promising applications in environmental monitoring and protection.

关键词： Poly(ethyleneimine)HeroinAu nanoparticleNanocompositeMethyl Orange removal

Identifying Hidden Li–Si–O Phases for Lithium-Ion Batteries via First-Principle Thermodynamic Calculations

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Energy & Environmental Materials 2022年第3期5卷 865-871页

作者： Jiale Qu Chao Ning Xiang Feng Bonan Yao Bo Liu Ziheng Lu Tianshuai Wang Zhi Wei Seh Siqi Shi Qianfan Zhang School of Materials Science and Engineering Beihang UniversityBeijing 100191China College of Mathematics and Physics Jinggangshan UniversityJi’an 343009China Department of Materials Science&Metallurgy University of CambridgeCambridge CB30FSUK Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A^(*)STAR)Singapore 138634Singapore School of Materials Science and Engineering Shanghai UniversityShanghai 200444China

SiO–based materials are promising alloys and conversion-type anode materials for lithium-ion batteries and are recently found to be excellent dendrite-proof layers for lithium-metal ***,only a small fraction of the Li–Si–O compositional space has been reported,significantly impeding the understanding of the phase transition mechanisms and the rational design of these materials both as anodes and as protection layers for lithium-metal ***,we identify three new thermodynamically stable phases within the Li–Si–O ternary system(Li_(2)SiO_(5),Li_(4)SiO_(6),and Li_(4)SiO_(8))in addition to the existing records via first-principle *** electronic structure simulation shows that Li_(2)SiO_(5)and Li_(4)SiO_(8)phases are metallic in nature,ensuring high electronic conductivity required as *** calculations demonstrate that the mechanical strength of Li–Si–O phases is much higher than that of lithium *** diffusion barriers of interstitial Li range from 0.1 to 0.6 eV and the interstitial Li hopping serves as the dominating diffusion mechanism in the Li–Si–O ternary systems compared with vacancy *** findings provide a new strategy for future discovery of improved alloying anodes for lithium-ion batteries and offer important insight towards the understanding of the phase transformation mechanism of alloy-type protection layers on lithium-metal anodes.

关键词： anode material crystal structure prediction first-principle calculations ternary alloy phase

Government environmental control measures on CO_(2) emission during the 2014 Youth Olympic Games in Nanjing:Perspectives from a top-down approach

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Journal of Environmental Sciences 2022年第3期34卷 165-178页

作者： Cheng Hu Cheng Liu Ning Hu Jun Hong Xinyue Ai College of Biology and the Environment Joint Center for sustainable Forestry in Southern ChinaNanjing Forestry UniversityNanjing 210037China Yale-NUIST Center on Atmospheric Environment International Joint Laboratory on Climate and Environment Change(ILCEC)Nanjing University of InformationScience&TechnologyNanjing 210044China Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution/School of Water Resources and Environmental Engineering East China University of TechnologyNanchang 330013China National Key Laboratory on Electromagnetic Environmental Effects and Electro-Optical Engineering Army Engineering UniversityNanjing 210022China

Strict air pollution control measures were conducted during the Youth Olympic Games(YOG)period at Nanjing city and surrounding areas in August *** event provides a unique chance to evaluate the effect of government control measures on regional atmospheric pollution and greenhouse gas *** previous studies have observed significant reductions of atmospheric pollution species and improvement in air quality,while no study has quantified its synergism on anthropogenic CO_(2)emissions,which can be coreduced with air *** better understand to what extent these pollution control measures have reduced anthropogenic CO_(2)emissions,we conducted atmospheric CO_(2)measurements at the suburban site in Nanjing city from 1^(st) July to 30^(th) September 2014 and 1^(st) August to 31^(st) August 2015,obvious decrease in atmospheric CO_(2)was observed between YOG and the rest *** coupling the a prioriemission inventory with atmospheric transport model,we applied the scale factor Bayesian inversion approach to derive the posteriori CO_(2)emissions in YOG period and regular *** indicate CO_(2)emissions from power industry decreased by 45%,and other categories also decreased by 16%for manufacturing combusting,and 37%for non-metallic mineral *** total anthropogenic CO_(2)emissions were 9.8(±3.6)×10^(9) kg/month CO_(2) for regular period and decreased to 6.2(±1.9)×10^(9) kg/month during the YOG period in Nanjing city,with a 36.7%*** scaling up to whole Jiangsu Province,anthropogenic CO_(2)emissions were 7.1(±2.4)×10^(10) kg/month CO_(2)for regular period and decreased to 4.4(±1.2)×10^(10)kg/month CO_(2) during the YOG period,yielding a 38.0%reduction.

关键词： Carbon dioxide Reduction measures Anthropogenic emissions Bayesian inversion

Isolation and application of predatory Bdellovibrio-and-like organisms for municipal waste sludge biolysis and dewaterability enhancement

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Frontiers of Environmental Science & Engineering 2017年第1期11卷 99-109页

作者： Ran Yu Shiwen Zhang Zhoukai Chen Chuanyang Li Key Laboratory of Energy Thermal Conversion and Control (Ministry of Education) Department of Environmental Science and Engineering School of Energy and Environment Southeast University N anjing 210096 China

Bdellovibrio-and-like organisms （BALOs） are a group of ubiquitous and obligate predatory bacteria and conmlonly used as biocontrol agents. In this study, an efficient, environmental-friendly, and convenient BALOs encouraged municipal waste sludge biolysis pretreatment technique was developed and investigated for dewaterability enhancement of excess waste sludge. The indigenous predatory BALOs were successfully isolated from the sludge for biolysis treatment. Without any chemical addition or pH adjustment, the sludge specific resistance （SRF） and capillary suction time （CST） were significantly reduced by as high as 53.4% and 23.8%, respectively within 24 h＇s treatment, which would further be lowered with the increase of BALOs input dosage. However, the continuous extension of reaction time would women the sludge dewaterability. The decreases of SRF and CST accompanied with the increases of sludge disintegration degree and soluble chemical oxygen demand, nitrogen, and phosphorus concentrations all emphasized the contributions of BALOs＇ predation activities to sludge disturbance, cell lysis, and consequently the release of sludge intracellular water to finally effectively improve the sludge dewaterability and disposal efficiency.

关键词： Bdellovibrio-and-like organisms (BALOs) Biolysis Activated sludge Dewaterability Predation