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Preparation and Characterization of Core-shell γ-Fe2O3/Au Composite Wenchang Zhuang1,a, Yuxiao Wang1,b 1School of Chemistry and Chemical Engineering, Xuzhou Institute of Technology, Xuzhou, 221111, China awindchant@xzit.edu.cn, bwangyuxiao@xzit.edu.cn Keywords: Composite; core-shell nanoparticle; chemical reduction; small angle X-ray scattering; interfacial structure Abstract.
Furthermore, the average particle size and interface structure were also analyzed using small angle X-ray scattering (SAXS).
As shown in Fig. 2, there are sharp diffraction peaks corresponding to γ-Fe2O3/Au composite, which indicate the forming of fine core-shell structure.
This result just agrees with the core-shell structure: on the one hand, the electronic density of γ-Fe2O3 is different from that of Au, however the difference of them is smaller a lot than that between γ-Fe2O3 and water so that it cannot be reflected by Guinier curve; on the other hand, the interface structures of particles can be analyzed by Porod’s theory when there are several matter with the different electronic density in the sol[10].

Vitrification and Sinter-Crystallization of Iron-Rich Industrial Wastes Alexander Karamanov Institute of Physical Chemistry, Bulgarian Academy of Sciences, Acad.
Information about the appearance, the micro- structure and the properties of obtained materials is also presented and discussed.
The structures of final glass-ceramic and the morphology of the formed crystal phases were observed by SEM.
The structures of materials were observed by optical microscopy.
These positive results are consequence of the higher crystallinity and the finer crystalline structure. 3.4 Crystallization, sintering and structure of materials, obtained by frits sintering.

The new micro-hotplate structure is benefit for the improvement of sensitivity and overall performance of the sensor.
Micro-hotplate Structure Design A new micro-hotplate with three pins is designed for gas sensor.
Fig. 1 Schematic diagram of the new micro-hotplate structure for gas sensor Material Selection and Optimization of Micro-hotplate Substrate Material Selection.
Fig. 2 Temperature distributions of the micro-hotplate with heat insulating layers for SiO2 or Si3N4 Optimization of Micro-hotplate Substrate Structure.
Kim: Materials Chemistry and Physics, Vol.133 (2012), p. 987-991

Techniques for producing oxides with nano-sized patterns and structures are well developed..
The nanoporous structure offers fast ion transport and low strain.
Zou, Metal-organic framework-based materials for hybrid supercapacitor application, Coordination Chemistry Reviews, 404 (2020) 213093
Coordination Chemistry Reviews, 473 (2022) 214771
Inorganic Chemistry 60 (17) (2021) 13168-13176

Polyvinylpyrrolidone (PVP, Mw=1,300,000) and Aluminum hydroxyacetate (Al(OH)C4H6O4) were purchased from Shanghai Aladdin Chemistry Co.
Those TEM images are useless because there is no crystal structure information at all.
Choi, Large scale patternable 3-dimensional carbon nanotube–graphene structure for flexible Li-ion battery, Carbon 68 (2014) 493-500
Ferraris, High surface area carbon nanofibers derived from electrospun PIM-1 for energy storage applications, Journal of Materials Chemistry A 2 (2014) 418-424
Song, Flexible macroporous carbon nanofiber film with high oil adsorption capacity, Journal of Materials Chemistry A 2 (2014) 3557

This phenomenon indicates that the self-setting process of CSC is mainly due to the formation of solid network structure, and with the densification and increase in mechanical strength [5].
Many pores in the structure can be seen from the image of magnification of 200 times (Fig.4 (a)).
Elkhadiri, Materials Chemistry and Physics, Vol. 94 (2005), p. 190-194
Wang, Journal of Materials Chemistry, Vol. 19 (2009), p. 1183-1190
Wang, Journal of Materials Chemistry, Vol. 19 (2009), p. 1183-1190.

In the global efforts to reduce generated hazardous waste, green chemistry and chemical processes are progressively integrating with modern developments in science and industry[11].
The green synthesis of silver nanoparticles involves three main steps, which must be evaluated based on green chemistry perspectives, including: (1) selection of solvent medium, (2) selection of environmentally benign reducing agent, and (3) selection of nontoxic substances for the silver nanoparticles stability.
Based on this approach, a clean, non-toxic, environmentally acceptable chemistry synthesis procedure has been developed.
The diffraction pattern is in agreement with the values of standard, pure, crystalline silver structure (JCPDS 4-0783).
The XRD pattern confirms that the structure of resultant silver nanoparticles is the face-centered cubic (FCC) crystal structure.

Masashi Kaneko [17] described a possible mechanism for the sulfonation of PP with fuming sulfuric acid with due consideration of the PP molecular structure, meanwhile proved that the contact angles rapidly decreased after 5 min of sulfonation, and the decrease rate gradually fell over the reaction period of 30 min.
We also discuss the dependence of alkali absorption properties and tensile strength of the separators on sulfonation concentration, at the same time, analyze the element and structure of the surface of PP membranes after treatment.
However, with further enhancing sulfonation concentration, the reaction of production after sulfonation will go on and it may destruct the surface structure of PP membranes effectively, resulting in a quick decrescence of tensile strength.
Sato: submitted to Macromolecular Chemistry and Physics (2005) 18.
Voth: submitted to Jouanal of Physical Chemistry B (2006) 19.

Results and Discussion Fig. 1 shows the crystal structures of bilayer TiO2/ZnO thin films with post-calcined at 500 °C.
Fig. 2 shows the crystal structure of bilayer ZnO/TiO2 thin films with post-calcined at 500 °C, All the TiO2 peak obtained in nanocrystalline anatase phase corresponds with the JCPDS (00-021-1272) file.
The increase of thin films photocatalytic activity with a higher calcination temperature can be related to the surface morphology and crystal structure.
Royal Society of Chemistry. 2016
Journal of Photochemistry and Photobiology A: Chemistry, 2016, 315: 25-33

The chemistry involved in the process is based on inorganic polymerisation reactions of metal alkoxide precursors M(OR)n, where M represents a network forming element such as Si and R stands for an alkyl group CxH2x+1 [1,2].
Several research works [6,7,8,9] have been presented on the effect of stirring on the bulk structure, which can lead to the crystallization of phase polymorphs or may have an effect on the morphology of the produced phases.
The Physics and Chemistry of Sol–Gel Processing, New York:Academic Press; 1990
Paraskevopoulos, Modifying a dental ceramic by bioactive glass via the sol–gel route: Characterization and bioactivity investigation, Materials Chemistry and Physics 125 (2011) 309-313 [6] FW Yan, SF Zhang, CY Guo, XH Zhang, GC Chen, F Yan, GQ Yuan, Influence of stirring speed on the crystallization of calcium carbonate.
[10] R Li, AE Clark, LL Hench, Effects of structure and surface area on bioactive powders by sol- gel process.