Search results

The inclusion complexes of amylose with active ligands are an emerging technique for nanoencapsulation because the single helix structure of amylose is comparatively the same structure of cyclodextrins [5,6].
The structures of the native starch and TPSIC containing various ratios TP were carried out using wide-angle X-ray diffraction.
The TPSIC with various ratios TP showed only V-type structure.
This is because that the gelatinization and retrogradation of starch could form a three-dimensional gel structure in which TP resided with greater stability [17].
Cereal Chemistry, 65, 443–446

The most important feature of PU‘s structure is the micro phase separation arising from thermodynamic incompatibility of hard and soft segments.
All the samples were hardened for two hours only in order to study the fillers incorporation in the PU structure.
We start further discussion with a description of the matrix material and fillers structure in order to explain the experimental results.
It is also known that graphite from the structural point of view is created by planar structure of carbon hexahedrons.
Kubičár, Comprehensive Analytical Chemistry, ed.

However, there is a limitation in the forming methods, because of the brittleness of TiAl alloys at temperature below 873 K.Attempts to improve the ductility of the alloys by chemistry modifications or microstructural control have shown limited success [3-4].
This implies that the mechanically activated powders possess essentially the crystal structure of alpha Ti and Al, which has very similar features to its SAED pattern, that is, during the mechanical activation process the Ti and A1 structure is maintained in situ.
b) The grain growth and hence the loss of the nanocrystalline structure, which would normally be expected to occur after product formation, are minimized.
d) During the mechanical activation process the Ti and A1 structure is maintained in situ.
The Synthesis and Structure of Nanocrvstalline Materials Produced by Mechanical Attrition: A Review [J].

It may be that Ba2+ entered in the perovskite structure, which acts as an important modified ion in the alkali-free barium boroaluminosilicate glass.
The phase structures of all samples were observed via X-ray diffraction (XRD, D8, Bruker.
Therefore, it’s reasonable to believe that Ba2+ entered in the perovskite structure.
Kim, et al, Effects of BaO-B2O3-SiO2 glass additive on densification and dielectric properties of BaTiO3 ceramics, Materials Chemistry and Physics. 94 (2005)185-189

The XRD profile of the films confirms hexagonal wurtizite structure with preferred orientation along the (101) pane.
The XRD pattern of all the CdZnS thinfilms deposited at different substrate temperature confirms the hexagonal structure with the preferred orientation along the (101) plane.
The XRD profile of the films confirms hexagonal wurtizite structure with preferred orientation along the (101) pane.
“The Effect of Substrate Temperature on the Structural and Some Physical Properties of Ultrasonically Sprayed CdS Films”, Materials Chemistry and Physics, 94, (2005)103-108

., therefore, pores inside geopolymer structure were found.
Davidovits, GEOPOLYMER Chemistry and applications, second ed., France, 2008
Leonelli, Inorganic polymers from alkali activation of metakaolin: Effect of setting and curing on structure.
Kumar, Mechanical activation of fly ash: Effect on reaction, structure and properties of resulting geopolymer.

Figure 2 Thermal barrier sensor coating deposited Figure 3 Calibration curves of YSZ:Eu2% by EB-PVD [30] YSZ:Gd2% and YSZ@Dy2% EB-PVD TBCs The top surface of a TBC can experience temperatures as high as 1300°C and it is anticipated that turbine entry temperatures may exceed 1500-1700°C, therefore, the challenge is to find luminescent materials which are sensitive at very high temperatures and are compatible with the TBC structure and chemistry.
Blasse, ‘Chemistry and Physics of R-activated Phosphors’ Handbook on the Physics and Chemistry of Rare-Earths, edited by Gschneidner, K.A., Hr., Eyring L., North Holland Publishing Company, (1979) pp237-274. 24.

Dual Function of Sugarcane Bagasse Ash in Removing Au(III) from Aqueous Solution Sri Juari Santosaa*, Nuryono Nuryonob, Fina Nur Aisyahc and Muhammad Hadid  Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia asjuari@ugm.ac.id, bnuryono_mipa@ugm.ac.id, cfina.nur.a@mail.ugm.ac.id, dmuhammadhadi@mail.ugm.ac.id  Keywords: Sugarcane, bagasse ash, Au(III), removal, adsorption, reduction Abstract.
The appearance of these new three peaks is related to [1 1 1], [2 0 0] and [2 2 0] reflection on the face-centered cubic (fcc) structure for Au metal [17,20].
Taylor (Ed.), Advances in Chemistry Research Vol. 61, Nova Science Publishers, New York, 2020, pp. 237-260
Taylor (Ed.), Advances in Chemistry Research, Vol. 58, Nova Science Publishers.

Preparation and Luminescent Properties of Nancrystalline ZrO2:Eu3+ by Emulsion Method Yanlin Chen1, a, Ming Yan1,b , Yiming Sun1,b and Jiaoqun Zhu2,b 1College of Chemistry & Environmental Engineering, Hubei University of Technology, Wuhan, 430068, China 2FWuhan University of Technology, Wuhan, 430070, China achenyl70@126.com, bcaridle@qq.com Keywords: Zirconia, Luminescence; Eu3+, Emulsion method.
Europium-doped nanocrystalline ZrO2: Eu3+ powders with different doped concentrations were prepared by emulsion processing method, with different doped concentration and calcination temperature on the material grain size, structure, size and luminescent properties.
Our previous work has shown that rare earth ion Er3+, Pr3+, Sm3+, Tm3+, and Eu3+ has a stable tetragonal phase effect, and the characteristic emission of rare earth ions in ZrO2 matrix depends on the nature of the crystalline structure and doping rare earth ions concentration.
As the annealing temperature rising, the material structure will be corresponding changes from the four winds crystal phase to the monoclinic phase for the sample crystal phase , the symmetry of the sample changes in their environment, in nano-materials Eu3+ is affected by a strong crystal field to lead the distance of 5D0 and 7F2 energy levels to become wide and lead 5D0 → 7F2 emission to blue shift phenomena, while the 5D0 → 7F1 emission changes rarely.

Synthesis of Mn and Se-doping TiO2 mesoporous materials and their antibacterial efficacy under visible light irradiation Sheng Chu,1, 2, Haoyue Zhu3, Min Xue1, 2, leilei Luo, 1, 2, Fei Kong, 1, 2, Ying Wang 1, 2* Zhigang Zou,1,* 1 Ecomaterials and Renewable Energy Research Center (ERERC), Nanjing University, Nanjing 210093 (China) 2 School of Chemistry and Chemical Engineering Nanjing University, Nanjing 210093 (China) 3 College of Letters and Science, University of Wisconsin-Madison,Madison WI 53715 (USA).
E-mail: wangy@nju.edu.cn Keywords: Antibacterial, mesoporous material, photocatalysis, doping, Titania Abstract Two kinds of visible light driven mesoporous structured Mn and Se-doping TiO2 nanocrystal photocatalysts have been synthesized through a modified sol-gel method, and N2 adsorption-desorption isotherm confirms that the mesoporous materials possess large pore size and narrow pore size distribution.
Results and Discussion Structure characterization Figure 1 illustrates the XRD patterns of Mn-TiO2 and Se-TiO2 mesouporous materials to provide the structural information of these reasulting composites.
The typical isotherms identified as type IV with the hysteresis loop of H1 type suggest that both Se and Mn doping TiO2 samples possess mesoporous structure with a relatively narrow pore size distribution [7].