Using drying spray and vulcanization process to fabricate a three-dimensional (3D) nest-like shape sulfur/carbon nanotube (S/CNTs) with polyaniline (PANI) coating as active material of cathode materials for Lithium-Sulfur batteries. For this composite has higher specific surface area, cross-linked conductive framework construed PANI coating and CNTs which provide a rapid charge electronic channel and improve REDOX kinetics of sulfur species to enhance the electron and ion rate capability and active material utilization. Vulcanized PANI coating act as an effective lithium sulfide host to restrain polysulfide dissolution and efficiently improve the cycle stability. Density functional theory (DFT) calculation confirmed that the electrical conductivity of polyaniline and adsorption of polysulfides was enhanced after vulcanization process. Synergic optimization the parameters of coating thickness, sulfur loading and vulcanization temperature, Under 11 nm of the PANI coating for SPANI@ (S/CNTs), when sulfur loading is low (1.16 mg cm-2), the optimum vulcanization temperature is 280 degrees C, When the sulfur loading >= 2.3 mg cm-2, optimal electrochemical performance at a sulfurization temperature of 220 degrees C.

A new lanthanide complex is designed and obtained based on the ligand of 2,4,5,6-tetrafluoroisophthalic acid (H2TFPA) and 1,10-phenanthroline (phen) under mild hydro(solvo)thermal conditions. The new complex has the molecular formula of [Tb2(TFBA)3(phen)2(H2O)2]n (TbMOF) and it is characterized in detail. It is confirmed that TbMOF shows high water stability, thermal stability, acid and alkali resistance. The experimental results show that TbMOF solid state sample shows a luminescence decay lifetime of 0.448 ms, and a high luminescence quantum yield (QY) of 38.15%. Interestingly, studies showed that TbMOF is an excellent sensor for detecting antibiotics of ciprofloxacin (CIP). In addition, the limit of detection (LOD) for CIP is an extremely high sensitivity value of 0.17 ppm. In the concentration range of 1.0 x 10-7-1.0 x 10-6 M, CIP shows an excellent linear relationship with the luminescence intensity of TbMOF. Most importantly, test paper based on TbMOF and fiber material of filter paper is fabricated, which is a strongly anti-interference, selective, sensitive, portable and visible to the naked eyes sensing device towards CIP in real samples of human urine, tap water, and lake water.

Ni-rich cathode materials have been considered as next-generation power lithium batteries due to their high energy density. However, some of the inherent properties have hindered Ni-rich cathode materials from further applications. Herein, a light weight and self-standing GPI-NCM811 electrode was obtained by filling poly-vinylidene fluoride (PVDF) and acetylene black-coated LiNi0.8Co0.1Mn0.1O2 (NCM811) material into graphitized polyimide (GPI) with double conductive surface engineering, which can maintain the structural stability during cycling and ensure the rapid diffusion of electron/Li-ion. The initial specific capacity of GPI-NCM811electrode (210 mAh/g) is obviously higher than the NCM811 electrode (202 mAh/g) at 0.1C. The initial Coulombic ef-ficiency (ICE) of GPI-NCM811electrode increased from 88.9 to 95.9% and its rate capacity is 127 mAh/g at 10 C, which is much higher than that of NCM811 electrode (104 mAh/g). It is because GPI has conductive network structure that can accommodate more electrolyte and fast electron conduction. The GPI-NCM811 electrode ca-pacity remains 83.5% of initial specific capacity between 2.8-4.3 V at 1C after 500 times, while that of NCM811 electrode remains 61.8%. This is due to the synergistic effect of the mixed coating to inhibit the occurrence of side reactions and self-standing to reduce the shedding of electrode material from the fluid collector during long cycle.

Two series of three dimensional (3D) lanthanide metal-organic frameworks (LnMOFs) of [Ln(tftpa)1.5(phen)(H2O)]n (Ln = Sm 1a, Eu 1b, Tb 1c, Dy 1d, H2tftpa = tetrafluoroterephthalic acid, phen = 1,10-phenanthrolin) and [Ln(tftpa)1.5(bpy)((HO)-O-2)]n (Ln = Sm 2a, Eu 2b, Tb 2c, Dy 2d, bpy = 2,2?-bipyridine) are obtained by structural regulation. Results reveal that the 3D LnMOFs show high water-and thermal-stability. Interestingly, through selecting the perfluorinated ligand, and using bpy as an auxiliary ligand to hold back the solvents near to the lanthanide ions, 2b, and 2c show high luminescence quantum yield (QY) of 74.50% and 60.03%, respectively. In order to further improve the luminescence QY, the auxiliary ligand of phen with larger conjugation and more rigid structure is synthesized to replace bpy, and fortunately, higher luminescence QY of 80.73% (1b) and 75.17% (1c) are realized.

稀土由于具有f电子,因此稀土?有机框架发光材料具有多样结构和独特的4f电子跃迁发光性质,被广大研究者们青睐.在绿色、环保、温和的水热条件下,选用Eu3+作为中心离子,通过引入配体四氟间苯二甲酸和辅助配体1,10?菲咯啉,合成了分子式为[Eu2(TFBA)6(phen)2(H2O)2]n(1-Eu,其中TFBA为脱质子的四氟间苯二甲酸,phen为1,10?菲咯啉)的稀土?有机框架材料.同时,利用X射线粉末衍射法(PXRD)、热重分析法(TGA)、傅里叶红外光谱法(FT-IR)等测试方法对1-Eu进行了详细的表征,确定了其准确结构和稳定性能,深入分析了其激发和发射光谱、荧光衰减寿命及荧光量子产率.实验结果表明:1-Eu是一个二维结构的稀土?有机框架材料,其荧光衰减寿命为0.652 ms,具有55.28％的高荧光量子产率(QY);除此之外,1-Eu还具有良好的耐水稳定性、热稳定性及耐酸碱性质.

Two series of terbium complexes of Tb-2(4-BMBA)(6)(phen)(2) (Tb-Br, 4-BMBA=4-Br-3-methylbenzoic acid, phen=1,10-phenanthroline) and Tb-2(4-IMBA)(6)(phen)(2) (Tb-I, 4-IMBA=4-I-3-methylbenzoic acid) are synthesized by varying the single factor of electron-acceptor property of substituent group Br and I at para-position of 3-methylbenzoic acid. They crystalize in the same space group, ligand and metal ions are arranged in the same mode. Interestingly, the luminescence quantum yield (QY) of Tb-Br is greater than Tb-I, indicating that weaker electron-acceptor group of I at para-position of 3-methylbenzoic acid leads to lower luminescence QY than Br in terbium complex. This is the first work to control the single variable factor to study the substituent group property on the luminescence QY of lanthanide complex. Further study reveals that Tb-I is a multiplex sensor for Fe2+, Co2+, and Ni2+.