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Journal of Rare Earths 2020年第10期38卷 1086-1092,I0003页

作者： Yanli Wu xianzhu xu Xiuli You Qiang Xiao Jiangxi Science and Technology Normal University Nanchang 330013China College of Life Science Jiangxi Normal UniversityNanchang 330031China

Mesoporous GdPO4:Eu@SiO2@mSiO2 core-shell nanorods(NRs) were prepared by a facile two-step ***,the monodispersed GdPO4:Eu NRs were obtained on a large scale via a facile precipitation method,then mesoporous silica was wrapped onto their surface through hydrolysis of tetraethylorthosilicate(TEOS).The XRD result indicates that the as-prepared GdPO4:Eu NRs core has hexagonal *** FTIR and the N2 adsorption/desorption isotherm analysis confirm the successful coating of mesoporous *** TEM images show that the obtained GdPO4:Eu@SiO2@mSiO2 NRs exhibit uniform monodisperse core-shell structure with a nanorod core(length of 200 nm;width of 20 nm),and mesoporous silica shell of 15 *** excitation of 274 nm,GdPO4:Eu@SiO2@mSiO2 NRs show strong red luminescence from 5 D0→7 FJ(J=1,2,3 and 4) transitions of Eu3+.Furthermore,the GdPO4:Eu@-SiO2@mSiO2 NRs exhibit obvious T1 enhancement effect due to paramagnetism of Gd3+.The drug loading capacity and pH-sensitive releasing behavior of the as-prepared GdPO4:Eu@SiO2@mSiO2 NRs were studied by using doxorubicin(DOX) as model *** excellent biocompatibility of GdPO4:Eu@-SiO2@mSiO2 NRs was demonstrated by MTT *** together,the mesoporous GdPO4:Eu@-SiO2@mSiO2 NRs may be potentially applied in fields of drug delivery and dual-modal imaging.

关键词： Core-shell structure Mesoporous silica Drug delivery Optical imaging Magnetic resonance imaging Rare earths

Composition Optimization and Microstructure Design in MOFs-Derived Magnetic Carbon-Based Microwave Absorbers:A Review

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Nano-Micro Letters 2021年第12期13卷 383-415页

作者： Honghong Zhao Fengyuan Wang Liru Cui xianzhu xu Xijiang Han Yunchen Du MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

Magnetic carbon-based composites are the most attractive candidates for electromagnetic(EM)absorption because they can terminate the propagation of surplus EM waves in space by interacting with both electric and magnetic ***-organic frameworks(MOFs)have demonstrated their great potential as sacrificing precursors of magnetic metals/carbon composites,because they provide a good platform to achieve high dispersion of magnetic nanoparticles in carbon ***,the chemical composition and microstructure of these composites are always highly dependent on their precursors and cannot promise an optimal EM state favorable for EM absorption,which more or less discount the superiority of MOFs-derived *** is hence of great importance to develop some accompanied methods that can regulate EM properties of MOFs-derived magnetic carbon-based composites e *** review comprehensively introduces recent advancements on EM absorption enhancement in MOFs-derived magnetic carbon-based composites and some available strategies *** addition,some challenges and prospects are also proposed to indicate the pending issues on performance breakthrough and mechanism exploration in the related field.

关键词： Magnetic carbon-based composites Metal–organic frameworks Composition optimization Microstructure design EM absorption enhancement

Synthesis of Submicrometer-sized Sn-MCM-41 Particles and Their Catalytic Performance in Baeyer-ViUiger Oxidation

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Chemical Research in Chinese Universities 2015年第1期31卷 138-143页

作者： CHEN Na JIANG Yanqiu CHENG Wenjing LIN Kaifeng xu xianzhu State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 P. R. China Academy of Fundamental and Interdisciplinary Sciences Harbin Institute of Technology Harbin 150080 P. R. China

Submicrometer-sized tin-containing MCM-41 particles with a size of several hundred nanometers（Sn-MCM-41/SMPs） were rapidly prepared with tin chloride as tin source and tetraethyl orthosilicate as silicon source via a dilute solution route in sodium hydroxide medium at room temperature. The characterization results show the highly ordered hexagonal mesopores and tetrahedral Sn species in Sn-MCM-41/SMPs. The material proved to be active and selective for Baeyer-Villiger oxidation of adamantanone with aqueous H2O2. Notably, Sn-MCM-41/ SMPs displayed a higher initial reaction rate and turnover number（TON） than common micrometer-sized Sn-MCM-41 large particles（Sn-MCM-41/LPs）, mainly attributed to the accelerated diffusion of the reactants and enhanced accessibility to the catalytic Sn species via shorter mesopore channels in Sn-MCM-41/SMPs. Furthermore, Sn-MCM-41/SMPs could be reused without the loss of activity after five runs, indicating that Sn active sites in the submicrometer-sized particles are remarkably stable. The study shows that decreasing particle size of Sn-MCM-41 in submicrometer scale is an effective way to achieve catalysts for Baeyer-Villiger oxidations with improved catalytic performance.

关键词： Sn-MCM-41 Submicrometer-sized particle Shorter mesopore channel Baeyer-Villiger oxidation

Mesoporous TiO_2/Carbon Beads: One-Pot Preparation and Their Application in Visible-Light-Induced Photodegradation

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Nano-Micro Letters 2015年第3期7卷 243-254页

作者： Xiaowei Li Yanqiu Jiang Wenjing Cheng Yudong Li xianzhu xu Kaifeng Lin Academy of Fundamental and Interdisciplinary Sciences Harbin Institute of Technology

Mesoporous Ti O2/Carbon beads have been prepared via a facile impregnation-carbonization approach, in which a porous anion-exchange resin and K2 Ti O(C2O4)2were used as hard carbon and titanium source, *** results reveal that the self-assembled composites have disordered mesostructure, uniform mesopores,large pore volumes, and high surface areas. The mesopore walls are composed of amorphous carbon, well-dispersed and confined anatase or rutile nanoparticles. Some anatase phase of Ti O2 was transformed to rutile phase via an increase of carbonization temperature or repeated impregnation of the resin with Ti O(C2O4)22-species. X-ray photoelectron spectroscopy, carbon, hydrogen, and nitrogen element analysis, and thermal gravity analysis results indicate the doping of carbon into the Ti O2 lattice and strong interaction between carbon and Ti O2 nanoparticles. A synergy effect by carbon and Ti O2 in the composites has been discussed herein on the degradation of methyl orange under visible light. The dye removal process involves adsorption of the dye from water by the mesopores in the composites, followed by photodegradation on the separated dye-loaded catalysts. Mesopores allow full access of the dye molecules to the surface of Ti O2 ***, the bead format of such composite enables their straightforward separation from the reaction mixture in their application as a liquid-phase heterogeneous photodegradation catalyst.

关键词： Ti O2nanoparticles Mesoporous carbon Composite bead Visible light Easy separation

In Situ Preparation and Analysis of Bimetal Co?doped Mesoporous Graphitic Carbon Nitride with Enhanced Photocatalytic Activity

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Nano-Micro Letters 2019年第1期11卷 175-190页

作者： Wanbao Wu Zhaohui Ruan Junzhuo Li Yudong Li Yanqiu Jiang xianzhu xu Defeng Li Yuan Yuan Kaifeng Lin School of Chemistry and Chemical Engineering Harbin Institute of Technology Key Laboratory of Aerospace Thermophysics Ministry of Industry and Information TechnologyHarbin Institute of Technology

A novel photocatalyst of mesoporous graphitic carbon nitride(g-C_3N_4) co-doped with Co and Mo(Co/Mo-MCN) has been one-pot synthesized via a simple template-free method; cobalt chloride and molybdenum disulfide were used as the Co and Mo sources, respectively. The characterization results evidently indicate that molybdenum disulfide functions as Mo sources to incorporate Mo atoms in the framework of g-C_3N_4 and as a catalyst for promoting the decomposition of g-C_3N_4, resulting in the creation of mesopores. The obtained Co/Mo-MCN exhibited a significant enhancement of the photocatalytic activity in H_2 evolution(8.6 times) and Rhodamine B degradation(10.1 times) under visible light irradiation compared to pristine g-C_3N_4. Furthermore, density functional theory calculations were applied to further understand the photocatalytic enhancement mechanism of the optical absorption properties at the atomic level after Co-or Mo-doping. Finite-di erence time-domain simulations were performed to evaluate the e ect of the mesopore structures on the light absorption capability. The results revealed that both the bimetal doping and the mesoporous architectures resulted in an enhanced optical absorption; this phenomenon was considered to have played a critical role in the improvement in the photocatalytic performance of Co/Mo-MCN.

关键词： Co-doped g-C3N4 Porous g-C3N4 Photocatalysis Optical simulation Light absorption intensity

Easily Separated and Recyclable Amino-functionalized Porous SiO2 Beads with 3D Continuous Meso/Macropore Channels

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Chemical Research in Chinese Universities 2018年第1期34卷 13-18页

作者： WANG Qi YANG Xiaohui JIANG Yanqiu HUO Hang LI Defeng LIN Kaifeng xu xianzhu MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin lnstimte of Technology Harbin 150090 P. R. China Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education Nankai University Tianjin 300071 P. R. China

Amino-fimctionalized porous SiO2 beads with a diameter of 200--800 μm（PSB-NH2） have been success- fully synthesized by grafting 3-ammopropyl-triethoxysilane onto meso/macroporous silica beads（PSB）, in which the PSB was prepared by hydrothermal synthetic method with a porous hard template anion-exchange resin. The as-prepared materials were characterized by means of nitrogen sorption and transmission electron micrographs（TEM）, showing the presence of 3D interconnected and continuous large mesopores and macropores inside. The beads were used to catalyze Knoevenagel condensation and proved to be highly active and selective due to the high accessibility of the reactants to the amino groups via the continuous 3D meso/macopores. Notably, such material in bead format facilitates the extremely straightforward separation from reaction solution without any centrifugation or filtration. Moreover, PSB-NH2 proved to be a stable catalyst via leaching experiment test, and can be easily recovered and reused without significant loss of activity in successive catalytic cycles.

关键词： Amino group, Porous SiO2 bead, Continuous 3D meso/macropore Knoevenagel condensation Straightforward separation

Synthesis, Structure and Properties of Two New Coordination Polymers Based on 4-[（8-Hydroxy-5-quinolinyl）azo]-benzenesulfonic Acid

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Chemical Research in Chinese Universities 2014年第1期30卷 27-31页

作者： LUO Yanan xu xianzhu SUN Fuxing YU Xiaoyang ZHANG Xiao ZHANG Ting YU Liying State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150080 P. R. China State Key Laboratory of Inorganic Synthesis & Preparative Chemistry Jilin University Changchun 130012 P. R. China College of Chemical and Pharmaceutical Engineering Jilin Institute of Chemical Technology Jilin 132022 P. R. China

Two new coordination polymers based on 4-[（8-hydroxy-5-quinolinyl）azo]-benzenesulfonic acid（H2L）,{[CdL（H2O）2]·H2O}n（1） and {[CdL（en）]·EtOH}n（2）（en=ethylenediamine）,were solvothermally synthesized and structurally characterized by single-crystal X-ray *** 1 and 2 exhibit infinite 1D ladder-shaped chain structures,which are isostructural except that the two coordinating water molecules in compound 1 were replaced by one en molecule in compound 2 due to the use of different organic *** 1 and 2 were constructed into different supramolecular frameworks by hydrogen bonding and π…π stacking *** addition,the fluorescent properties of compounds 1 and 2 were ***,they were also investigated via IR spectral analysis,elemental analysis,powder X-ray diffraction（PXRD） and thermogravimetric analysis（TGA）.

关键词： 4-[(8-Hydroxy-5-quinolinyl)azo]-benzenesulfonic acid Solvothermal synthesis Coordination polymer Fluorescent property

Heterogeneous Mediator Enabling Three-Dimensional Growth of Lithium Sulfide for High-Performance Lithium-Sulfur Batteries

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Energy & Environmental Materials 2022年第4期5卷 1214-1221页

作者： Da Tian xueqin Song Yue Qiu xun Sun Bo Jiang Chenghao Zhao Yu Zhang xianzhu xu Lishuang Fan Naiqing Zhang School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Academy of Fundamental and Interdisciplinary Sciences Harbin Institute of TechnologyHarbin 150001China State Keys Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150001China

Two-dimensional(2D)deposition regime of insulating lithium sulfide(Li_(2)S)is a major obstacle to achieve high reversible capacity in the conventional glyme-based lithium-sulfur(Li-S)batteries as it leads to rapid loss of active electrode surface and low sulfur *** three-dimensional(3D)growth of Li_(2)S is therefore considered to be necessary,but the available strategies are mainly based on the electrolyte manipulations,which inevitably lead to added complexity of the electrode-electrolyte compatibility and,in particular,instability of the lithium *** this work,we have developed a heterogeneous polysulfide mediator composed of discrete Mo_(5)N_(6) anchored on graphene,which functions on the cathode side,to regulate the deposition mode of Li_(2)***_(5)N_(6) can efficiently boost the formation of Li_(2)S as demonstrated by a series of experimental and computational *** importantly,the discrete distribution of Mo_(5)N_(6) nucleants on graphene postpones the merging of adjacent Li_(2)S nuclei to promote their isotropic ***,3D deposits of Li_(2)S is guided by the heterogeneous *** from these unique superiorities,Li-S cells with high rate capability of 954 mAh g^(-1) at 2 C and long cycle life exceeding 1000 cycles are realized without advanced lithium anode protection.

关键词： electrocatalysis lithium sulfide nucleation lithium-sulfur batteries polysulfide redox reaction shuttle effect

Synthesis of bifunctional Gd_2O_3:Eu^(3+) nanocrystals and their applications in biomedical imaging

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Journal of Rare Earths 2015年第5期33卷 529-534页

作者：吴燕利徐贤柱李倩兰阳如春丁海新肖强 Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal University College of Life Science Jiangxi Normal University

Ultrafine Gd2O3：Eu3＋nanocrystals were successfully prepared by a simple reverse microemulsion method and subsequent calcination. Their structural, optical and magnetic properties were investigated using scanning electron microscopy （SEM）, transmis-sion electron microscopy （TEM）, X-ray diffraction （XRD）, Fourier transform infrared （FTIR）, photoluminescence （PL）, and magnetic property measurement system （MPMS）. The amorphous Gd2（CO3）3：Eu3＋colloidal spheres were proved as an intermediate product, and gradually transformed into crystallized Gd2O3：Eu3＋with average diameter less than 100 nm. The paramagnetic property of the synthesized Gd2O3：Eu3＋nanocrystals were confirmed with its linear hysteresis plot （M-H）. And Gd2O3：Eu3＋nanocrystals showed high contrast T1-enhancing modality due to the presence of the Gd3＋ ions onto the particle surface. In addition, the application of the Gd2O3：Eu3＋nanocrystals as biotag for cell labeling was reported, red fluorescence from Eu3＋ions observed by fluorescence micros-copy showed that the nanocrystals could permeate the cell membrane. Cytotoxicity studies of the Gd2O3：Eu3＋nanocrystals showed no adverse effect on cell viability, evidencing their high biological compatibility. Therefore, the nanoprobe formed from Gd2O3：Eu3＋nanocrystals provided the dual modality of optical and magnetic resonance imaging.

关键词： Gd2O3:Eu3+nanocrystal dual-modality optical and MR imaging rare earths

荧光/顺磁性双功能CS/GdPO_4∶Tb微球的制备及性质

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功能材料 2015年第21期46卷 21124-21127,21132页

作者：吴燕利徐贤柱陈曦熊丹丹肖强江西科技师范大学有机功能分子研究所南昌330013 江西师范大学生命学院南昌330022

用喷雾干燥法将GdPO4∶Tb纳米棒包裹在壳聚糖(CS)微球中,成功地制备了一种新颖的CS/GdPO4∶Tb复合物微球。利用X射线衍射仪(XRD)、傅立叶红外光谱仪(FT-IR)、场发射扫描电子显微镜(SEM)、透射电镜(TEM)等检测手段表征了产物的形貌和结... 详细信息

用喷雾干燥法将GdPO4∶Tb纳米棒包裹在壳聚糖(CS)微球中,成功地制备了一种新颖的CS/GdPO4∶Tb复合物微球。利用X射线衍射仪(XRD)、傅立叶红外光谱仪(FT-IR)、场发射扫描电子显微镜(SEM)、透射电镜(TEM)等检测手段表征了产物的形貌和结构特征。分析表明,CS/GdPO4∶Tb微球呈鸟巢状,表面粗糙,其粒径约为5μm,其形貌与相同条件下得到的纯壳聚糖微球显著不同,这主要是由于GdPO4∶Tb纳米棒的骨架作用。磁性和荧光光谱的研究表明,该复合物同时具有良好的荧光性能和顺磁性,使其在生物医学领域具有潜在应用能力。

关键词： CS/GdPO4∶Tb复合物顺磁性荧光双功能微球