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Preparation of ultra-high pure scandium oxide with crude product from titanium white waste acid

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Journal of Rare Earths 2023年第5期41卷 764-770,I0005页

作者： Xiujing Peng Ling Li Miaomiao Zhang Yu Cui Xuchuan Jiang Guoxin Sun Institute for Smart Materials&Engineering University of JinanJinan 250022China School of Chemistry and chemical Engineering University of JinanJinan 250022China

Recovery of scandium from titanium white waste acid is an essential source of *** and economical production of high purity scandium remains a challenge.A new extractant,N,N,N’,N’-tetracyclohexyl-diglycolamide(TCHDGA),was synthesized,and the separation performance of scandium from impurity metal ions(Ti,Mn,Ba,Fe,Al and Mg)was investigated,The effects of mixing time,acid concentration and temperature on the scandium extraction were *** extraction mechanism was studied by infrared spectroscopy and the Equimole Series *** optimized conditions,the extractant shows a strong affinity to scandium in the nitric acid medium and high extraction separation factors between scandium and these impurity metal ions,A process for the purification of scandium was *** crude product obtained from titanium white waste acid,95%purity scandium oxide,can be purified to 99.99%after only one step of extraction,scrubbing,and stripping:This technology is economical and straightforward and can realize the high-value recovery of scandium in the titanium white waste acid.

关键词： TCHDGA Recovery Scandium Ultra-high pure Titanium white waste acid Rare earths

On the enhanced properties of composite asphalt via adding surface modified calcium sulfate whisker-SBR

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Chinese Journal of chemical Engineering 2024年第12期76卷 187-200页

作者： Aoqi Cui Emmerson Hondo Nur Fatihah Tajul Arifin Yanpeng Pei Xuan Su Zhonghe Chen School of Chemistry and chemical Engineering University of JinanJinan 250022China Department of chemical and Biomolecular Engineering National University of Singapore119260Singapore

With the aim of improving the durability and safety,erosion time,and cost-effective of asphalt road,a composite of modified calcium sulfate whisker-styrene butadiene rubber modified asphalt(MCSWSBRMA)was prepared via thermal ***,stearic acid and titanate coupling agent(NDZ-201)were used as a modifier to transform calcium sulfate whisker(CSW)into MCSW via wet modification method at 60℃and anhydrous ethanol as a *** is more,the optimum loading of modifier(a mixture of 25%stearic acid+75%NDZ-201)was found to be at 2%to prepare ***,a composite of MCSW-SBRMA was prepared with different loading of MCSW(i.e.2%to 8%)to enhance the softening point of *** this study,it was found that 4%of modifiers was the best composition to improve the MCSW-SBRMA properties as elucidated in the orthogonal experiment table L_(16)(42).The effects of MCSW and SBR addition on several properties of asphalt were studied by multiple routine tests including penetration,segregation test,and so *** results show that:2%to 8%MCSW can increase the softening point of SBR modified asphalt(SBRMA)by 7%to 8%.4%MCSW increased the PG of SBRMA from 64 to 70,which greatly improved the high temperature characteristics of *** 5℃ductility of MCSW-SBRMA is greater than 100 cm,which greatly improves the low temperature performance of *** the application of fluorescence microscopy(FM),Fourier transform infrared spectroscopy(FTIR),Scanning electron microscopy(SEM),and energy dispersive spectroscopy(SEM-EDS),it has been demonstrated that MCSW-SBR effectively alters asphalt in a highly uniform manner,with some MCSW still retaining large cross sections,thereby facilitating the dispersion of shear stress and enhancing the durability of asphalt.

关键词： Surface modification Calcium sulfate whisker SBR Modified asphalt High temperature performance

Self-Powered Flexible Multicolor Electrochromic Devices for Information Displays

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Research 2024年第2期2023卷 529-540页

作者： Wenzhao Xue Yun Zhang Feng Liu Yao Dou Mei Yan Wenshou Wang School of Chemistry and chemical Engineering University of JinanJinan 250022P.R.China

The development of self-powered flexible multicolor electrochromic(EC)systems that could switch different color without an external power supply has remained extremely ***,a new trilayer film structure for achieving self-powered flexible multicolor EC displays based on self-charging/discharging mechanism is proposed,which is simply assembled by sandwiching an ionic gel film between 2 cathodic nickel hexacyanoferrate(NiHCF)and Prussian blue(PB)nanoparticle films on indium tin oxide *** display exhibits independent self-powered color switching of NiHCF and PB films with fast responsive time and high reversibility by selectively connecting the Al wire as anodes with the 2 EC *** switching is thus achieved through a color overlay effect by superimposing the 2 EC films,including green,blue,yellow,and *** bleaching/coloration process of the displays is driven by the discharging/self-charging mechanism for NiHCF and PB films,respectively,ensuring the self-powered color switching of the displays reversibly without an external power *** is further demonstrated that patterns can be easily created in the self-powered EC displays by the spray-coating method,allowing multicolor changing to convey specific ***,a self-powered ionic writing board is demonstrated based on the self-powered EC displays that can be repeatedly written freehand without the need of an external power *** believe that the design concept may provide new insights into the development of self-powered flexible multicolor EC displays with self-recovered energy for widespread applications.

关键词： connecting repeatedly powered

A Luminescent Cd(Ⅱ) coordination Polymer constructed from Isophthalic Acid and 1,3-Bis-(4-pyridyl)propane

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Chinese Journal of Structural Chemistry 2015年第6期34卷 925-930页

作者： XU Bo LI Zhi-Wang JIANG Yang LI Cun-Cheng Key Laboratory of chemical Sensing & Analysis in Universities of Shandong (University of jinan) School of Chemistry and Chemical Engineering University of Jinan

A new coordination complex [Cd2（ip）2（bpp）]n （1, H2ip = isophthalic acid, bpp = 1,3-bis-（4-pyridyl） propane） has been synthesized and structurally characterized. Crystal data for the title complex are as follows： triclinic system, space group Pi with a = 9.6724（6）, b = 10.2243（6）, c = 14.8205（9） A, a = 88.927（5）, β = 71.664（6）, ）, = 75.767（5）°, F= 1345.79（14） A3, Mr = 751.29, Z= 2, F（000） = 740, Dc = 1.854 g/cm^3,μ（MoKa） = 1.636 mm^-1, R = 0.0259 and wR = 0.0623 for 4754 observed reflections with I 〉 20（0. X-ray structure analysis reveals that complex 1 holds a 3D architecture based on a-Po primitive cubic units with the [Cd4（coO）8] units treated as 6-connected nodes. Solid-state properties for 1, such as infrared spectroscopy, elemental analyses, thermal stability and luminescent property, have also been investigated.

关键词： coordination polymer crystal structure luminescence mixed-ligand approach

Ab initio Study of Mechanism of Cycloaddition Reaction be- tween Germylene Silylene （H2Ge=Si：） and Acetone

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Chinese Journal of Chemistry 2011年第9期29卷 1969-1974页

作者： Lu, Xiuhui Han, Junfeng Li, Yongqing Wang, Zhina School of Chemistry and chemical Engineering University of Jinan Jinan Shandong 250022 China

The mechanism of the cycloaddition reaction between singlet germylene silylene （H2Ge =Si：） and acetone has been investigated with CCSD（T）/6-31G＊//MP2/6-31 G＊ method. From the potential energy profile, we could predict that the reaction has two competitive dominant reaction channels. The present rule of this reaction is that the [2 ＋2] cycloaddition reaction of the two π-bonds in germylene silylene and acetone generates a four-membered ring silylene with Ge. Because of the unsaturated property of Si atom in the four-membered ring silylene with Ge, it could further react with acetone, resulting in the generation of a bis-heterocyclic compound with Si and Ge. Simul- taneously, the ring strain of the four-membered ring silylene with Ge makes it isomerize to a twisted four-membered ring product.

关键词： germylene silylene cycloacldition reaction potential energy surface

Theoretical Study of the Mechanism of Cycloaddition Reaction between Silylene Silylene （H2Si=Si：） and Acetone

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Chinese Journal of Chemistry 2012年第3期30卷 675-680页

作者：汪智娜时乐义李永庆卢秀慧 School of Chemistry and chemical Engineering University of JinanJinanShandong 250022China

The mechanism of the cycloaddition reaction between singlet silylene silylene （H2Si = Si：） and acetone has been investigated with the CCSD （T）//MP2/6-31 G＊ method, According to the potential energy profile, it can be predicted that the reaction has two competitive dominant reaction channels. The present rule of this reaction is that the [2 ＋ 2] cycloaddition reaction of the two ^-bonds in silylene silylene （H2Si=Si：） and acetone leads to the formation of a four-membered ring silylene （E3）. Because of the unsaturated property of Si： atom in E3, it further reacts with ace- tone to form a silicic bis-heterocyclic compound （P7）. Simultaneously, the ring strain of the four-membered ring silylene （E3） makes it isomerize to a twisted four-membered ring product （P4）.

关键词： silylene silylene (H2Si = Si:) cycloaddition reaction potential energy profile

Unconventional Fluorescent and Multi-responsive Polyethyleneimine with LCST and UCST Behavior:Synthesis,Characterization and Biological Applications

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Chinese Journal of Polymer Science 2024年第6期42卷 826-837页

作者： Feng-Ming Yin Li-Li Wu Shu-Sheng Li Xiao-Na Pan Xiao-Li Zhu Xu-Bao Jiang Xiang Zheng Kong college of Chemistry and chemical Engineering University of JinanJinan250022China Shandong Institute for Product Quality Inspection Jinan250102China college of chemical Engineering Tianjin UniversityTianjin300072China

Non-aromatic fluorescent and multi-responsive materials,exhibiting inherent fluorescence emission and controlled phase change,have garnered significant attention in recent ***,the underlying interaction between their fluorescent properties and phase transition remains *** this study,we synthesized a series of catalyst-free aza-Michael addition-based polyethyleneimine(RFPEI)materials by reacting polyethyleneimine(PEI)with N-isopropyl acrylamide(NIPAM).The resulting RFPEI was comprehensively characterized,and demonstrated dual-phase transition behavior(LCST and UCST)in water,which could be finely tuned by adjusting its composition or external factors such as ***,upon UV irradiation(365 nm),RFPEI exhibited strong fluorescence *** further investigated the effects of NIPAM grafting percentage to PEI,polymer concentration,and pH on the LCST/UCST and fluorescent properties of RFPEI aqueous ***,we showcased the great potential of RFPEI as a versatile tool for physiological cell imaging,trace detection,and controlled release of *** study presents a novel class of stimuli-responsive fluorescent materials with promising applications in the field of biomedicine.

关键词： Polyethyleneimine Multi-responsiveness Intrinsic fluorescence emission Cell imaging controlled drug release

Microencapsulation of dodecyl acetate by complex coacervation of whey protein with acacia gum and its release behavior

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Chinese chemical Letters 2012年第7期23卷 847-850页

作者： You Tong Yu Li Na Liu Xiao Li Zhu Xiang Zheng Kong college of Chemistry and chemical Engineering University of JinanJinan 250022China

complex coacervation of whey protein（WP） with acacia gum（AG） was carried out in water with the presence of dodecyl acetate （DA）,a component of insect sex pheromones,in order to obtain microcapsules with DA as the core material and WP-AG coacervate as the wall *** variations in wall/core ratios,concentrations of the wall materials in capsule preparations,DA encapsulation was optimized,which showed a high DA encapsulation was achieved when coacervation was conducted at pH 3.5 with wall/core mass ratio at 3 combined with concentration of wall materials at 1.0 wt%.Morphology and the structure of DA loaded microcapsules were examined by scanning electron microscope,which showed the microcapsules were of core/shell structure with DA encapsulated in the inner of the *** release was examined and the behavior of the release was discussed.

关键词： Whey protein Acacia gum complex coacervation Insect pheromone encapsulation controlled release

Electrode/Electrolyte Interfacial Chemistry Modulated by Chelating Effect for High-Performance Zinc Anode

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Energy & Environmental Materials 2024年第3期7卷 93-99页

作者： Chuanlin Li Guangmeng Qu Xixi Zhang Chenggang Wang Xijin Xu School of Physics and Technology University of JinanJinan 250022China School of Chemistry and chemical Engineering Shandong UniversityJinan 250100China

Although Zn metal has been regarded as the most promising anode for aqueous batteries,its practical application is still restricted by side reactions and dendrite ***,an in-situ solid electrolyte interphase(SEI)film formed on the interface of electrode/electrolyte during the plating/stripping of zinc anodes by introducing trace amounts of multidentate ligand sodium diethyldithiocarbamate(DDTC)additive into 1 M ZnSO_(4).The synergistic effect of in-situ solid electrolyte interphase forming and chelate effect endows Zn^(2+)with uniform and rapid interface-diffusion kinetics against dendrite growth and surface side *** a result,the Zn anode in 1 M ZnSO_(4)+DDTC electrolytes displays an ultra-high coulombic efficiency of 99.5%and cycling stability(more than 2000 h),especially at high current density(more than 600 cycles at 40 mA cm^(-2)).Moreover,the Zn//MnO_(2)full cells in the ZnSO_(4)+DDTC electrolyte exhibit outstanding cyclic stability(with 98.6%capacity retention after 2000 cycles at 10 C).This electrode/electrolyte interfacial chemistry modulated strategy provides new insight into enhancing zinc anode stability for high-performance aqueous zinc batteries.

关键词： chelating effect in-situ SEI ultra-high current density Zn anodes