冯守华
光电磁材料以及复合氧化物和复合氟化物的微波与水热合成
个性化签名
- 姓名:冯守华
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者, 国家杰出青年科学基金获得者
- 职称:-
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学科领域:
无机化学
- 研究兴趣:光电磁材料以及复合氧化物和复合氟化物的微波与水热合成
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394
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10
【期刊论文】Synthesis of silica nanotubes from kaolin clay
冯守华, Wenjun Dong, a c Wenjiang Li, b Kaifeng Yu, c K. Krishna, b Lizhu Song, c Xiaofeng Wang, a Zichen Wang, *c Marc-Olivier Coppens b and Shouhua Feng*a
CHEM. COMMUN., 2003M, 1302-1303,-0001,():
-1年11月30日
Silica nanotubes were synthesized from kaolin clay using surfactant intercalation, sulfuric acid and hydrothermal treatments.
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【期刊论文】A Well-Confined Redox Route to Silver Nanoparticles on the Surface of MoO3
冯守华, Wenjun Dong, Shouhua Feng, * Zhan Shi, Liansheng Li, and Yuehua Xu
Chem. Mater. 2003, 10 (15): 1941-1943,-0001,():
-1年11月30日
The preparation of nanomaterials is a great challenge in the fields of synthetic chemistry and materials science because of the unusual properties that differentiate them from the bulk.1-13 To utilize and optimize the chemical/physical properties of nanoscale metals, a number of workers have focused on the control of the size and/or shape of nanoparticles as well as their selfassembly into ordered structures by developing effective synthetic techniques. Several techniques, such as gas condensation,14 irradiation,15,16 sol-gel,17,18 sonochemical deposition,19 and nanostructured templates20-22 for preventing the nanoparticles from irreversible aggregation, have been reported. Here, we report an effective well-confined redox method to prepare high-quality Agnanoparticles. Our strategy was based on a self-redox
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冯守华, Zhan Shi, Shouhua Feng, * Lirong Zhang, Guoyu Yang, and Jia Hua
Chem. Mater. 1999, 10 (12): 2930-2935,-0001,():
-1年11月30日
Three inorganic-organic hybrid compounds with the formula CuL(VO2)(PO4), L) 4,4 -bipy, 1,10-phen, and 2,2 -bipy, were hydrothermally synthesized at 160℃ for 120h and characterized by single-crystal X-ray diffraction. The use of different bidentate organodiamine ligands in initial reaction systems gave rise to the variety in the structures of the products: Cu(4,4 -bipy)(VO2)(PO4) (1) and Cu(1,10-phen)(VO2)(PO4) (2) crystallize in a monoclinic system with space group C2/c, a) 21.952(4) Å, b) 8.0805(13) Å, c) 15.918(2) Å, â ) 110.689(4)°, and V) 2641.5(7) Å3, and a) 20.4557(12) Å, b) 11.6231(7) Å, c) 14.6422(8) Å, â) 127.5520(10)°, and V ) 2760.0(3) Å3, respectively. Cu(2,2 - bipy)(VO2)-(PO4) (3) crystallizes in a triclinic system with space group P1h, a ) 5.561(5) Å, b ) 10.271(9) Å, c ) 11.780(9) Å, R) 74.31(3)°, â) 79.98(3)°, ç) 85.74(3)°, and V) 637.6(9) Å3. The structures of 1 and 2 possess the same (VO2)(PO4) 2 four-membered rings, whereas the structure of 3 contains (VO2)(PO4) infinite chains. In terms of the organic parts, the Cu(4,4 -bipy) linear chains connect the (VO2)(PO4) 2 four-membered rings to build up a 3D framework in 1, whereas the Cu(1,10-phen)2+ and Cu(2,2 -bipy)2+ fragments link with the (VO2)(PO4) 2 four-membered rings and (VO2)(PO4) infinite chains to give two 1D structures of 2 and 3, respectively. Their thermal stabilities were investigated.
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冯守华, Zhan Shi, Lirong Zhang, Guangshan Zhu, Guoyu Yang, Jia Hua, Hong Ding, and Shouhua Feng*
Chem. Mater. 1999, 12 (11): 3565-3570,-0001,():
-1年11月30日
The hydrothermal reactions of V2O5, H2C2O4, Ni(NO3)2, ethylenediamine(en) or 1,2-diaminopropane(enMe) and water yield layered vanadium oxides with interlayer metal coordination complexes [Ni(en)2]0.5[V3O7] (1) and [Ni(enMe)2]0.5[H2enMe]0.5[V6O14] (2). 1 crystallizes in an orthorhombic system with space group Pbcn and cell parameters a) 16.617-(3)
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冯守华, Hui Zhao and Shouhua Feng*
Chem. Mater. 1998, 4 (11): 958-964,-0001,():
-1年11月30日
A series of codoped nanocrystalline ceria compositions, Ce1-xMxBi0.4O2.6-x (M) Ca, Sr, and Ba; x) 0.01-0.15) were hydrothermally synthesized at 240℃ and characterized by powder X-ray diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. All as-made Ce1-xMxBi0.4O2.6-x crystallize in cubic fluorite-type structures and exhibit solid solution properties. The average particle sizes of Ce1-xMxBi0.4O2.6-x compositions obtained from hydrothermal systems were determined by the Scherrer equation and transmission electron microscopy to be approximately 32, 20, and 15nm for Ca, Sr, and Ba systems, respectively. The oxygen ionic conductivities of the codoped Ce1-xMxBi0.4O2.6-x were investigated by an ac (alternating current) impedance technique as a function of temperature and alkaline earth element contents. The highest ionic conductivity for Ce0.95Ca0.05Bi0.4O2.55 at 600℃ was 1.7_10-2 Sâcm-1 with the activation energy Ea) 46.3 KJâmol-1. In addition, the ionic transference numbers for the Ca, Sr, and Ba codoped systems were almost unit, showing their highly pure ionic conductivities.
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冯守华, Guangsheng Pang, Shouhua Feng, * Yongchun Tang, Chiheng Tan, and Ruren Xu
Chem. Mater. 1998, 9 (10): 2446-2449,-0001,():
-1年11月30日
A novel fluorite-related superlattice structure compound Bi17V3O33 has been synthesized by a hydrothermal method. The content of vanadium and the base concentration in the reaction systems play important roles in the formation of the product. Bi17V3O33 crystallizes in the tetragonal system with cell parameters a) 1.227(6) and c) 1.104(7)nm. Its structure is consistent with a x5 _ x5 _ 2 superlattice based on a fluorite subcell. Bi17V3O33 shows a structural transformation at 802℃, and the transformed phase, which keeps the main framework structure, is stable until melting at 910℃. The conductivity of Bi17V3O33 and the transformed phase are 2.14×10-4 and 1.03×10-3 S•cm-1 at 500℃, respectively.
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冯守华, Guangshe Li, † Shouhua Feng, *, † Liping Li, ‡ Xirong Li, † and Weijie Jin†
Chem. Mater. 1997, 12 (9): 2894-2901,-0001,():
-1年11月30日
Hydrogarnets Sr3M2(OH)12 (M ) Cr, Fe, and Al) were synthesized from mild hydrothermal systems at 240℃ with Sr(OH)2â8H2O, Cr(NO3)3â9H2O, Fe(NO3)3â9H2O, and Al(OH)3 as the starting materials. High solubility of the input species and basic concentration in the reaction systems considerably lower crystallization temperatures and enhance the crystallinity of the resulting hydrogarnets. The structural stability and thermal properties of Sr based hydrogarnets were investigated by X-ray diffraction, DTA-TG, infrared, and X-ray photoelectron spectroscopies. With increasing temperature, Sr based hydrogarnets underwent fast dehydration due to the loss of the nearest OH- species of Sr-OH dodecahedra. During the course of decomposition, valence variations of the hydrogarnet framework ions, e.g., Fe and Cr directly determined the decomposition process and phase compositions in final decomposition products. The decomposition product of Sr3Cr2(OH)12 in air was a mixture of SrCrO4 and SrO, but in N2, a mixture of a rhombohedral phase Sr4Cr2O8 with some amorphous phase was observed; in either O2 or N2, Sr3Fe2(OH)12 decomposed to an unknown phase, which was not a perovskite Sr3Fe2O7-x. Sr3Al2(OH)12 decomposed to a single phase Sr3Al2O6. InSr-Fe hydrogarnet, two different symmetric octahedra of Fe(OH)6 were revealed by Mossbauer spectroscopy. Mild hydrothermal crystallization and the thermal decomposition behaviors of Sr-based hydrogarnets are discussed.
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冯守华, By Guangshe Li, * Liping Li, Shouhua Feng, Minqiang Wang, Liangying Zhang, and Xi Yao
Adv. Mater. 1999, 11, No.2,-0001,():
-1年11月30日
Novel bismuth-containing fluorite oxides are of great interest for potential applications in fuel cells and oxygen sensors with significant advantages over traditional inorganic sensor materials such as stabilized zirconia.[1] These oxide materials are conventionally prepared by a ceramic method involving multiple steps of mixing, grinding, and firing of the component oxides or carbonates at high temperatures. This method has many drawbacks, notably the major problems of air pollution and energy consumption. Moreover, the reaction mechanism controlled by diffusion of ionic species has some limitations in the preparation of advanced oxide materials, e.g., nanocrystalline solids cannot be prepared by this route. Many scientists are aware of these disadvantages and are putting great effort into developing convenient and inexpensive mild chemistry routes for the formation of novel oxides.[2,3]
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冯守华
,-0001,():
-1年11月30日
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【期刊论文】New Materials in Hydrothermal Synthesis
冯守华, SHOUHUA FENG AND RUREN XU*
Acc. Chem. Res. 2001, 34, 239-247,-0001,():
-1年11月30日
In this Account we describe the hydrothermal synthesis of some new materials including microporous crystals, ionic conductors, complex oxides and fluorides, low-dimensional aluminophosphates, inorganic-organic hybrid materials, and particularly condensed materials such as diamond and inorganic helical chains. Hydrothermal synthesis in biology and environment sciences is also introduced. The increasing interest in hydrothemal synthesis derives from its advantages in terms of high reactivity of reactants, easy control of solution or interface reactions, formation of metastable and unique condensed phases, less air pollution, and low energy consumption.
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