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According to the results of x-ray phase analysis (Fig. 2), the sample is cobalt (II) ferrite with spinel structure (Cobalt Iron Oxide), with unit cell parameter of a = 0.8394 nm and α-Fe2O3 (α-Hematite).
Vijaya, Selectivity and efficient Pb and Cd ions removal by magnetic MFe2O4 (M=Co, Ni, Cu and Zn) nanoparticles, Materials Chemistry and Physics. 232 (2019) 254-264
Mitchenko, Synthesis of Low-Pour-Point Diesel Fuel in the Presence of a Composite Cobalt-Containing Catalyst, Petroleum Chemistry. 57 (2017) 1186-1189
Jia, Novel Co–Fe–O micro/nano structures manipulated by urea and their applications in degradation of hexachlorobenzene, Materials Research Innovations. 22 (2018) 159-167
Shabelskaya, Synthesis and Properties of Binary Spinels in a NiO-CuO-Fe2O3-Cr2O3 System, Glass Physics and Chemistry. 43 (2017) 240-245.

Observation on the Structure of Ordered Mesoporous Materials at High Temperature via in situ X-ray Diffraction Chun Fang Zhou and Jian Hua Zhu* Key Laboratory of Mesoscopic Chemistry, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing 210093, China E-mail:jhzhu@nju.edu.cn Keywords: In situ XRD technique; Structure; Ordered mesoporous materials; Zeolites; High temperature Abstract.
One is the collapse of ordered structure, and the other is thermal shock of the pore wall at high temperature.
In addition, these results indicate that arrangement of pore structures also affects thermal stability of ordered mesoporous materials.
Therefore the intercrossed pore wall structure such as MCM-48 and SBA-16 with 3D pore structures may be firmer than the ordered mesoporous materials with simple pore walls at high temperature. 4.
This probably originates from the thermal shock of the pore wall, instead of the permanent collapse of the mesoscopic structure.

The surface of sensor chip was modified and then target sequence and probe-2 were induced, which formed a sandwich structure.
Results and discussion The developed assay was performed in two simple steps to form a sandwich structure.
Tudos: The Royal Society of Chemistry (2008) 001-403 [5] B.
Villiers: Clinical Chemistry (2006) 52, 255-262 [10] M.
Luppa: Clinical Chemistry (2005) 51, 401-407 [11] E.

Structure and Optical Properties of ZnO and ZnO2 Nanoparticles J.E.
The crystalline structure and phase change from ZnO2 to ZnO by heat treatment was studied in detail.
Ali, Synthesis of ZnO Nanostructures Using Sol-Gel Method, Procedia Chemistry 19, ( 2016), 211–216. ].
Wu, Chin-Cheng Hsu, Synthesis and photocatalytic activity of ZnO/ZnO2 composite, Journal of Photochemistry and Photobiology A: Chemistry, 172, (2005), 269. ].
Structure analysis Crystal structure of materials was determine by XRD technique.

Barium titanate nanopowders prepared from the modified oxalate co-precipitation method Pusit Pookmanee1,a* , Chanitpa Khantha1,b, and Sukon Phanichphant2,c 1 Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, Thailand 2 Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand a*pusit@mju.ac.th, batomic_413@yahoo.co.th, and cpsukon@yahoo.com Keywords: Barium titanate, modified oxalate, XRD, SEM, EDXS Abstract.
Cubic structure of barium titanate was obtained after calcinations at 700 oC for 2h.
Single phase of BaTiO3 with cubic structure was obtained after calcination at 700 oC for 2h (Fig. 1.
Single phase cubic structure of BaTiO3 nanopowders was obtained after calcination at 700 oC for 2h.
Acknowledgements This research was supported by the Department of Chemistry, the Faculty of Science and Maejo University, Thailand.

Introduction No matter in bulk or nanometer size, platinum metal is undoubtedly an excellent kind of catalysts in modern chemistry.
XRD analysis is an effective method to characterize crystal structures and composition of blank CNTs and Pt-CNTs, as shown in Fig. 3.
The morphological structure and average size distribution of Pt NPs were studied by TEM.
At a relatively low pH, PEG's structure is partly destroyed, and the reducing ability is weak.
Skrabalak Shape-Controlled Synthesis of Metal Nan-ocrystals: Simple Chemistry Meets Complex Physics?

Inorganic Chemistry, Vol.48 (2009), p. 2136 [9] M.
Chemistry of Materials, Vol.22 (2010), p. 5905 [10] L.
Industrial & Engineering Chemistry Research, Vol.52 (2013), p. 13333 [15] S.
Journal of Intelligent Material Systems and Structures, Vol.10 (1999), p. 836 [17] Zhijian Wang, Zhiyong Ma, Yao Wang, Zejun Xu, Yiyang Luo, Yen Wei, and Xinru Jia.
Smart Materials and Structures, Vol.23 (2014), p. 095038

Lignin is of mesh structure that serves as a support skel- eton surrounded and strengthening cellulose and hemicelluloses[2].
Hemicellulose is a mixture made of different polysaccharide constitute, whose structures and composition are greatly various and no general formula.
Lignin is a 3d space structure polymer compound by phenyl propane unit through carbon connected to carbon.
Usually, the oxygen can not oxidize lignin structure.In alkaline conditions(O2- NaOH), however, phenolic groups of lignin,s phenolic structure dissociation, quinoidstructure or will open benzene structure to generate sticky furfural.
Prgress in Chemistry , 22,654 (2010)

Based on the crystal chemistry characteristics of industrial vermiculite, the application mineralogy characteristics of the industrial vermiculite samples from four Mines in China have been studied.
The chemical compositions have difference in the different interstratified structure type samples.
The crystal chemistry formula of vermiculite mineralogy is (Mg,Ca,Na)m(H2O)n｛(Mg,Fe,Al)3 [(Si,Al)4O10] (OH)2｝, the layer charge number of unite formula is between 0.6 ~ 0.9.
Table 2 Percentage of vermiculite layers and interstratifications characteristics Sample Interstratified structure characteristic Ver. layer(%) Sample Interstratified structure characteristic Ver. layer(%) Wv-4 Phl.
Interstratified structure type is mainly irregular interstratified structure formed by chlorite and vermiculite layers.

Fractal geometry has been applied in the fields of geology and chemistry.
Based on the structure of conventional gemini surfactant A as Fig.3 shows [16], the structure of the newly designed gemini surfactant B is as Fig.4 shows.
Oilfield Chemistry, 26(2): 183-186. (2009) [4] S.K.
Zeng: Fractal analysis of thioredoxin reductase structure.
Oilfield Chemistry, 24(2): 138-142. (2007) [17] M.J.