沈强
表面活性剂调控无机物结晶;二次电池材料。
个性化签名
- 姓名:沈强
- 目前身份:
- 担任导师情况:
- 学位:
-
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
- 职称:-
-
学科领域:
无机化学
- 研究兴趣:表面活性剂调控无机物结晶;二次电池材料。
沈强 教授
【学习及工作经历】
09/1986~07/1990 徐州师范大学化学系,理学学士
09/1990~07/1993 山东大学化学学院,理学硕士
08/1993~至 今 山东大学化学与化工学院
09/1995~07/1998 中国科学院渗流流体力学研究所(在职),工学博士
01/2001~02/2002 法国原子能研究院凝聚态物理部,博士后
08/2002~01/2003 高级访问学者,中国科学院化学所
【研究领域和兴趣】
表面活性剂调控无机物结晶
二次电池材料
【承担项目】
[1]. 二价金属十二烷基硫酸盐自组装结构体系中的仿生矿化机理研究. 国家自然科学基金 (30万元, 负责人).
[2]. 教育部新世纪优秀人才支持计划 (50万元, 负责人).
[3]. 六方片状碳酸钙的仿生制备及应用. 山东省科技攻关计划项目 (12万元, 负责人).
[4]. 分子仿生体系的设计与物性研究. 国家自然科学基金(重点项目) (25万元, 参加者).
[5]. 基于生物矿化原理的有机-无机纳米结构的制备与性能研究. 国家重点基础研究发展计划(973) (20万元, 参加者).
-
主页访问
1391
-
关注数
0
-
成果阅读
758
-
成果数
19
沈强, Qiang Shen a, ∗, Hao Wei b, Ying Zhao b, Du-Jin Wang b, ∗∗, Li-Qiang Zheng a, Duan-Fu Xu b
Colloids and Surfaces A: Physicochem. Eng. Aspects 251(2004)87-91,-0001,():
-1年11月30日
The crystallization of calcium carbonate was conducted by the reaction of sodium carbonate with calcium chloride in the presence of polyvinylpyrrolidone (PVP), sodium dodecylbenzene sulfonate (SDBS), or the mixture of PVP and SDBS, respectively. The morphology and polymorphism of these CaCO3 crystals were characterized with scanning electron microscopy (SEM) and powder X-ray diffraction (XRD). The results showed that the organic additives and their self-assemblies turn out to be important factors to affect the crystallization habit of CaCO3. In particular, the controlling effect on the morphology depends upon not only the total concentration of PVP and SDBS, but also the relative concentration ratio of PVP to SDBS.
Crystallization, Biomimetic mineralization, Calcium carbonate, Morphology, Polymorph
-
53浏览
-
0点赞
-
0收藏
-
0分享
-
671下载
-
0评论
-
引用
【期刊论文】Effect of anionic surfactant–polymer complexes on the crystallization of calcium carbonate
沈强, Hao Weia, Qiang Shenb, , Ying Zhaoa, Yong Zhoua, Dujin Wanga, *, Duanfu Xua
Journal of Crystal Growth 264(2004)424-429,-0001,():
-1年11月30日
The synthesis of calcium carbonate (CaCO3) crystals from aqueous solutions containing anion surfactants (sodium dodecylsulfonate (DDS), sodium dodecylbenzenesulfonate (SDBS)) or anionic surfactant–poly(N-vinyl-1-pyrrolidone) (PVP) complexes has been performed by the method of rapid mixing of the solutions of calcium chloride (CaCl2) and sodium carbonate (Na2CO3), followed by 10-h incubation under stirring. Polymorphism of CaCO3 crystals was observed in different additive systems. In pure anionic surfactant systems, DDS induced the transformation of initially formed amorphous CaCO3 to calcite, while SDBS favored the formation of vaterite as the final product. The addition of PVP into the above two anionic surfactant systems, promoting the formation of supermolecular complexes of surfactant/polymer, resulted in a distinct variation of the morphology of CaCO3 crystals. The polymorphs of CaCO3 are dependent not only on PVP but also on DDS or SDBS concentrations in the complex solution, i.e., anionic surfactants control the crystalline phase, but PVP only changes the crystal shape.
B1., Calcium carbonate, B1., Calcite, Vaterite, B1., Poly(, vinylpyrrolidone), , B1., Sodium dodecylsulfonate, B1., Sodium dodecylbenzenesulfonate
-
30浏览
-
0点赞
-
0收藏
-
0分享
-
523下载
-
0评论
-
引用
【期刊论文】The effect of carboxymethyl chitosan on the precipitation of calcium carbonate
沈强, Po Liang, Ying Zhao*, Qiang Shen, Dujin Wang*, Duanfu Xu
Journal of Crystal Growth 261(2004)571-576,-0001,():
-1年11月30日
It is believed that chitosan plays an important role on the formation of specific inorganic–organic hybrid structure of shells. In this paper, insoluble chitoan was modified to a water-soluble macromolecule-carboxymethyl chitosan (CMCS), and further used as an additive in the crystallization process of calcium carbonate (CaCO3). The combination investigation of XRD, Micro FT-IR and SEM on the precipitated crystals shows that the addition of CMCS obviously changed the crystal morphology, but did not induce the transformation of the crystal form, i.e., CaCO3 keeps calcite form in all the cases no matter whether CMCS exists or not in the precipitation systems. The morphological variation of CaCO3 strongly depends on the CMCS concentration in the aqueous solutions.
A1., Crystal morphology, B1., Calcium carbonate, B1., Carboxymethyl chitosan
-
51浏览
-
0点赞
-
0收藏
-
0分享
-
351下载
-
0评论
-
引用
沈强, Hao Weia, Qiang Shenb, *, Ying Zhaoa, Dujin Wanga, Duanfu Xua
Journal of Crystal Growth 260(2004)545-550,-0001,():
-1年11月30日
The synthesis of calcium carbonate (CaCO3) crystals from aqueous solutions containing sodium dodecyl sulfate (SDS), poly(N-vinyl-1-pyrrolidone) (PVP) or SDS/PVP complexes has been performed through a slow titration method. It was found that aragonite and calcite coexisted in the prepared crystals. The formation of aragonite in the precipitation systems without magnesium ions indicates that at ambient temperature ca. 26.0℃, initially formed amorphous CaCO3 could also transfer into aragonite in the sedimentary phase, which indicates the controlling factor of organic additives in the nucleation and growth process of CaCO3 crystals. The appearance of hexagonal crystals in the suspensible phase confirmed the hexagonal crystallization cell of vaterite, and revealed the colloidal-dispersion function of the SDS/PVP complex in the crystallization process of CaCO3.
B1., Aragonite, B1., Calcium carbonate, B1., Calcite, B1., Poly(, vinyl pyrrolidone), , B1., Sodium dodecyl sulfate
-
41浏览
-
0点赞
-
0收藏
-
0分享
-
296下载
-
0评论
-
引用
-
30浏览
-
0点赞
-
0收藏
-
0分享
-
93下载
-
0评论
-
引用
【期刊论文】Petunia-Shaped Superstructures of CaCO3 Aggregates Modulated by Modified Chitosan
沈强, Po Liang, † Qiang Shen, †, ‡ Ying Zhao, *, † Yong Zhou, † Hao Wei, † Ingo Lieberwirth, § Yaping Huang, † Dujin Wang, † and Duanfu Xu†
Langmuir 2004, 20, 10444-10448,-0001,():
-1年11月30日
This paper presents the crystallization behavior of calcium carbonate at the air/liquid interface of aqueous systems of carboxymethyl chitosan (CMCS) using the Kitano method. Although the synthesized CMCS (Mw≈100000) with 1.57 degree of carboxymethyl substitution shows no surface activity, it controls the crystallization of calcium carbonate to form a petunia-shaped superstructure. The shuttlecock-like head of this superstructure strongly supports Cölfen's opinion (Rudloff, J.; Cölfen, H. Langmuir 2004, 20, 991-996) for the existence of a gas template of CO2 bubbles temporarily captured by polymer molecules, while formation of the stem of this superstructure is provisionally attributed to the presence of the strong electrostatic interactions between calcium ions and the carboxylate groups. The CaCO3 superstructure and its morphology depend not only on the polymer concentration but also on the combined number of calcium ions per CMCS molecule. These results imply that this simple and versatile method expands the morphological investigation of mineralization processes.
-
78浏览
-
0点赞
-
0收藏
-
0分享
-
58下载
-
0评论
-
引用
沈强, Qiang Shen, *, † Yakun Chen, ‡ Hao Wei, ‡ Ying Zhao, ‡ Dujin Wang, ‡ and Duanfu Xu‡
CRYSTAL GROWTH & DESIGN 2005 VOL.5,NO.4 1387-1391,-0001,():
-1年11月30日
The template-directed nucleation of inorganic materials by organic supramolecular frameworks is an overarching principle in biomineralization. In the present work, synthesized latex particles of poly(styrene-ranmethacrylic acid) were used as additives for the crystallization modification of calcium carbonate (CaCO3). The influence of latex particles on the crystallization behavior was investigated by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermal gravimetry analysis (TGA). The results indicate that not only the concentrations of polymer latex but also the pH values of the initial polymer latex solution affect the controlling effect of latex particles on the CaCO3 crystalline phase. Another interesting phenomenon is that freshly prepared latex particles induced the formation of a clear organic/inorganic interface, while the addition of flocculated latex suspension generated the unique concave calcites, which might be attributed to the dissolution of vaterite in the precipitated crystals.
-
73浏览
-
0点赞
-
0收藏
-
0分享
-
141下载
-
0评论
-
引用
沈强, Qiang Shen, *, †, ‡ Hao Wei, ‡ Liancheng Wang, † Yong Zhou, ‡ Ying Zhao, ‡ Zhiqing Zhang, † Dujin Wang, ‡ Guiying Xu, † and Duanfu Xu‡
J. Phys. Chem. B 2005, 109, 18342-18347,-0001,():
-1年11月30日
An anionic surfactant interacts strongly with a polymer molecule to form a self-assembled structure, due to the attractive force of the hydrophobic association and electrostatic repulsion. In this crystallization medium, the surfactant-stabilized inorganic particles adsorbed on the polymer chains, as well as the bridging effect of polymer molecules, controlled the aggregation behavior of colloidal particles.1 In this presentation, the spontaneous precipitation of calcium carbonate (CaCO3) was conducted from the aqueous systems containing a water-soluble polymer (poly(vinylpyrrolidone), PVP) and an anionic surfactant (sodium dodecyl sulfate, SDS). When the SDS concentrations were lower than the onset of interaction between PVP and SDS, the precipitated CaCO3 crystals were typically hexahedron-shaped calcite; the increasing SDS concentration caused the morphologies of CaCO3 aggregates to change from the flower-shaped calcite to hollow spherical calcite, then to solid spherical vaterite. These results indicate that the self-organized configurations of the polymer/surfactant supramolecules dominate the morphologies of CaCO3 aggregates, implying that this simple and versatile method expands the morphological investigation of the mineralization process.
-
80浏览
-
0点赞
-
0收藏
-
0分享
-
307下载
-
0评论
-
引用
【期刊论文】Properties of Amorphous Calcium Carbonate and the Template Action of Vaterite Spheres
沈强, Qiang Shen, *, †, ‡ Hao Wei, † Yong Zhou, † Yaping Huang, † Hengrui Yang, † Dujin Wang, † and Duanfu Xu†
J. Phys. Chem. B 2006, 110, 2994-3000,-0001,():
-1年11月30日
The fast mixing of aqueous solutions of calcium chloride and sodium carbonate could immediately result in amorphous calcium carbonate (ACC). Under vigorous stirring, the formed ACC in the precipitation system will dissolve first and, then, transform within minutes to produce crystalline forms of vaterite and calcite. After that, the solution-mediated mechanism dominates the transformation of the thermodynamically unstable vaterite into the thermodynamically stable calcite. Although ACC is the least stable form of the six anhydrous phases of calcium carbonate (CaCO3), it could be, however, produced and stabilized by a variety of organisms. To better understand the formation-transformation mechanism of ACC and vaterite into calcite, ex-situ methods (i.e., scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction spectroscopy) were used to characterize the formation-transformation process of ACC and vaterite in aqueous systems without organic additives, showing that ACC sampled at different conditions has different properties (i.e., lifetime, morphology, and spectrum characterization). It is also very interesting to capture the obviously polycrystalline particles of CaCO3 during the transformation process from vaterite to calcite, which suggests the formation mechanism for the calcite superstructure with multidimensional morphology.
-
35浏览
-
0点赞
-
0收藏
-
0分享
-
317下载
-
0评论
-
引用
沈强, Qiang Shen, *, † Liancheng Wang, † Yaping Huang, ‡ Jinglun Sun, † Haihua Wang, † Yong Zhou, ‡ and Dujin Wang‡
J. Phys. Chem. B 2006, 110, 23148-23153,-0001,():
-1年11月30日
Calcium dodecyl sulfate (CDS) was used for the first time both as an anionic surfactant and as the source of mineral ions in the precipitation process of calcium carbonate (CaCO3). The simple reaction of the enriched Ca2+ ions at the so-called organic-inorganic interfaces with the slowly bubbled CO2 gas resulted in the metastable vaterite polymorph with various structures. The single-crystalline vaterite of the hexagonal platelets, the lens-shaped structures with hexagonal symmetry, the olive-shaped superstructures and these with a concave at each top of olives, and another metastable polymorph of aragonite were obtained, respectively, depending upon the concentration ratio between CDS and n-pentanol. The synergistic effect of CDS and n-pentanol is believed to play a crucial role in driving the oriented aggregation of metastable nanoparticles. Simultaneously, the novel phase transformation of vaterite to aragonite was observed, implying the possible formation mechanism of aragonite at room temperature and in the absence of magnesium ions.
-
31浏览
-
0点赞
-
0收藏
-
0分享
-
166下载
-
0评论
-
引用