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Preparation and Characterization of Exfoliated Poly（ethyleneterephthalate）/Montmorillonite Nanocomposites Using Modified MMTs with Variable Content of Antimony Acetate

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Chinese Journal of Chemistry 2011年第6期29卷 1278-1284页

作者： Wang, xiaoqun Wang, Yaqing Zhao, Zhenlu Zhu, Xiaoguang Nie, Cong Du, Shanyi School of Material Science and Engineering Beihang University Beijing 100191 China

Poly（ethylene terephthalate）（PET）/montmorillonite （MMT） nanocomposite was prepared by the direct polymerization with MMTs modified with variable content of antimony acetate （Sb（OAc）3）, which was also used as catalyst polymerization. The modified MMTs （AS-Sb-MMT） were prepared by intercalating both Sb（OAc）3 and amphoteric surfactant （AS） into MMT layers. Nine kinds of Sb-MMTs [MMT treated with Sb（OAc）3] with different Sb content were obtained, but only six kinds of PET/MMT nanocomposites could be prepared. ICPAES was used to characterize Sb content of modified MMT, XRD was used to characterize interlayer spacing, IR spectroscopy was used to characterize composition change of Sb catalyst in modified MMT and TEM was used to investigate micromorphology of PET/MMT nanocomposites. Several results are obtained, i.e., （a） Sb content of Sb-MMT is affected by both drying temperature and washing-drying sequence, （b） compared with Na-MMT （unmodified MMT）, the change in the interlayer spacing of Sb-MMT is attributed to the solvent ethylene glycol （EG） rather than the intercalated or absorbed Sb（OAc）3, （c） based on this, a model is developed to describe the swelling of Na-MMT and modified MMT by EG and the effect of drying temperature on the interlayer spacing, （d） exfoliation state of MMT in PET matrix of nanocomposites is controlled not only by Sb content and interlayer spacing, but also by the composition of Sb catalyst in modified MMT.

关键词： organic-inorganic hybrid composites clay polyethylene terephthalate (PET) exfoliated interlayer spacing

Targeted Management of Perovskite Film by Co(Ⅱ)Sulfophenyl Porphyrin for Efficient and Stable Solar Cells

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Chinese Journal of Chemistry 2023年第1期41卷 43-49页

作者： Xiao-Xia Feng Xudong Lv Jing Cao Yu Tang State Key Laboratory of Applied organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhouGansu 730000China

In the lead halide perovskite solar cells(PSCs),the redox reaction of I-and Pb^(2+) ions in perovskite materials under the fabrication and operation processes causes the formation of defects to destroy the cell efficiency and long-term ***,we have employed a Co(Ⅱ)sulfophenyl porphyrin(CoTPPS)to modify the perovskite *** sulfonic group could coordinate with Pb2+to efficiently passivate the uncoordinated Pb^(2+).Additionally,Co^(2+) ions in CoTPPS could react with I^(2) generated under the thermal and light stress to yield the Co^(3+) and I^(-),thus achieving the regeneration of I^(-) in perovskite ***,the CoTPPS could realize the targeted management of the imperfections in perovskite *** a result,the modified PSCs reveal the remarkably enhanced cell *** importantly,the CoTPPS modified device retains 75%of its initial efficiency value storing at 85℃for 2000 h and about 70%of its efficiency when being continuously illuminated at a simulated sunlight for 1200 *** strategy tackles the chemical reaction and inhibits the defect generation,thus improving the operational stability and efficiency of PSCs.

关键词： Co(Ⅱ)sulfophenyl porphyrin Perovskite solar cells organic-inorganic hybrid composites Redox chemistry Cooperative effect

Highly Stable Perovskite Solar Cells by Reducing Residual Water-Induced Decomposition of Perovskite

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中国化学:英文版 2023年第13期41卷 1594-1602页

作者： Xudong Yang Wenxi Ji Qiaoyun Chen Rui Su Longgui Zhang Ailian Wang Taoyi Zhang Yi Zhou Bo Song Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and DevicesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu215123 China Sinopec(Beijing)Research Institute of Chemical Industry Co. Ltd.Beijing100013 China

Residual water-induced decomposition is one of the dominant reasons for the decay of power conversion efficiency (PCE) in perovskite solar cells (Pero-SCs). To solve this problem, we introduce traces amount of sodium hyaluronate (SH) into the perovskite active layer to reduce the remaining water during the preparation of perovskite films. Unlike the traditionally adopted passive protection of perovskite from exterior water by low surface energy coatings, this study provides active control of the interior water by the addition of a water adsorbent into the perovskite films. The encapsulated Pero-SCs with SH retain approximately 70% of their initial PCE in 4000 h, while those without SH retain 32% of their initial PCE in 1000 h under the dark and ambient atmosphere. The unencapsulated Pero-SCs with SH stored in N2 atmosphere maintain over 94% of the initial PCE in 3000 h at room temperature away from light and remain over 88% of the initial PCE in 2000 h even the devices are heated to 70 °C. It has been proven that the improved stability is mainly due to the well-controlled residual water in perovskite films. Concomitantly, the PCE of p-i-n solar cells based on (FAPbI3)0.85(MAPbBr3)0.15 is improved from 19.34% to 21.54%.

关键词： Perovskite solar cells Sodium hyaluronate organic-inorganic hybrid composites Stability

Recent Progress in Metal-organic Frameworks@Cellulose hybrids and Their Applications

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Chinese Journal of Chemistry 2021年第12期39卷 3462-3480页

作者： Xiongli Liu Yun Xiao Zhiyuan Zhang Zifeng You Jinli Li Dingxuan Ma Baiyan Li School of Materials Science and Engineering National institute for Advanced MaterialsTKL of Metal and Molecule-Based Material ChemistryNankai UniversityTianjin 300350China College of Chemistry and Molecular Engineering Laboratory of Eco-chemical EngineeringMinistry of EducationQingdao University of Science and TechnologyQingdao 266042China General English Department College of Foreign LanguagesNankai UniversityTianjin 300071China

In recent years,metal-organic frameworks(MOFs)are attracting increasing attention due to their charming ***,the intrinsic fragility,powdered crystalline state,and poor processibility of MOFs hinder their further *** this,the designs of MOF-based aerogels,hydrogels,membranes are effective ways to solve this ***,silica,synthetic polymer and cellulose are the commonly used raw materials for fabricating MOF-based aerogels,hydrogels,and *** them,cellulose and its derivatives are the best candidates to support the powdered MOFs from the perspectives of economy,environmental protection and *** review focuses on discussing the advantages of MOF@cellulose hybrids in applications such as water treatment,antibacterial,gas separation and adsorption,energy storage,drug delivery,catalysis,and other smart ***@cellulose-based aerogels,hydrogels and membranes can provide valuable guidance for investigating the practical application of MOFs in terms of processability,reusability,stability and easiness in handling.

关键词： Metal-organic frameworks Cellulose Membranes organic-inorganic hybrid composites Application

A Novel Neodymium-tartrate Complex with Distinctive Rare Topology:Hydrothermal Synthesis and Crystal Structure

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Chinese Journal of Structural Chemistry 2011年第12期30卷 1731-1736页

作者：王彦周菊红刘光祥陈友存 School of Chemistry and Chemical Engineering Anhui Key Laboratory of Functional Coordination CompoundsAnqing Teachers College State Key Laboratory of Coordination Chemistry Nanjing University

One novel neodymium-tartrate complex exhibiting distinctive rare topology,name-ly,[Nd（TTA）1.5（H2O）]·H2O（1,H2TTA = tartaric acid）,was successfully synthesized by the reaction of neodymium-oxide with H2TTA under hydrothermal ***-crystal X-ray diffraction analysis reveals that 1 belongs to the monoclinic system,space group P21/c with a = 6.0357（13）,b = 7.6106（17）,c = 24.389（5） ,β = 100.136（5）°,V = 1102.8（4） 3,Z = 4,Dc = 2.423 g·cm-3,μ = 4.763 mm-1,F（000） = 776,the final R = 0.0689 and wR = *** complex 1,the 2D layer consisting of μ4-ligands and 4-connected Nd（III） centers is a rare example of uni-nodal net of（42.64） *** 2D layers are further connected by μ2-TTA2-ligands to give a 3D（42.64）（42.67.8） topological structure,where the Nd（III） atoms act as rare 5-connected topological blocks.

关键词： crystal engineering topochemistry organic-inorganic hybrid composites hydrothermal synthesis

Assembly of Preformed Gold Nanoparticles onto Thermore- sponsive Poly（N-isopropylacrylamide）-Based Microgels on the Basis of Au-thiol Chemistry

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Chinese Journal of Chemistry 2017年第11期35卷 1755-1760页

作者： Tao Wang Yanan Song Liang Jin Jiaxi Li Yu Gao Shan Shi College of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang Liaoning 110142 China

The assembly of preformed gold nanoparticles （AuNPs） onto the thermoresponsive poly（N-isopropylacrylamide）（PNIPAM）-based microgels was achieved on the basis of the driving force of Au-thiol chemistry. The loading amount of AuNPs can be controlled by varying the ratio of AuNPs relative to PNIPAM-based microgels. The as-prepared PNIPAM/Au hybrid microgels showed well-defined reversible swelling/deswelling transition in re- sponse to temperature, which can be employed to tune the plasmonic property of hybrid microgels. As the tempera- ture was increased, the position of localized surface plasmon resonance （LSPR） band red-shifted to some extent mainly due to the increase in the local refractive index around AuNPs.

关键词： microgels organic-inorganic hybrid composites gold nanoparticles thermoresponsive

Anions Distorting Triggering Ferroelectricity in a Molecular Crystal

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Chinese Journal of Chemistry 2022年第18期40卷 2226-2231页

作者： Si-Yu Ye Jing-Yuan Liu Liang Tong Yan-Ning Wang Min Wan Abraham Mensah Xiao-Fan Jiang Jun-Yi Li Li-Zhuang Chen School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiangJiangsu212003 China College of Chemistry Key Laboratory of Theoretical&Computational Photochemistry of Ministry of EducationBeijing Normal UniversityBeijing100875 China

Recently,molecular ferroelectrics have attracted more and more attention due to their structural diversity,low cost of manufacture,and environmental-friendly ***,most of the design strategies for molecular ferroelectrics have focused on the selection and modification of cations,and the use of anions has been rarely ***,introducing distorted[CuBr_(4)]^(2-) tetrahedra,we obtained a high curie temperature(T_(c))ferroelectric,[cyclopentylammonium]_(2)CuBr_(4),with a T_(c) as high as 393 K,and exceeding commercial and most of reported molecular ferroelectric BaTiO_(3)(393 K).Variable-temperature hysteresis loop shows the nonlinear P-E loop of the crystal under a wide temperature ***-temperature single-crystal X-ray diffraction revealed that the Aizu expression can be written as *** short,this work will inspire more creative strategies by exploiting the tunability of the anion module.

关键词： Molecular ferroelastic Anions Design strategy organic-inorganic hybrid composites Phase transitions