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That might be caused by formation of conjugated structure from polyaniline.
XRD is an effective tool for determining structure of materials.
Journal of Materials Chemistry, 2011, 22(1):153-160
Journal of Physical Chemistry C, 2011, 115(47):23584-23590
The Journal of Physical Chemistry C, 2013, 118(2):1294-1305

INDIA 2 Department of Chemistry, PSG College of Technology, Coimbatore-641004.
The core-shell structures consist of a nanocrystaline core over which shells of another nanocrystaline material or several materials are covered.
The gas-sensing efficiency of a material depends on its micro and nanostructural properties which are related to its method of preparation, the latter playing a very important role with regard to the chemistry, structure and properties of ZnO nanomaterials.
When heated to higher temperature, the core-shell structure will remain similar to heterojunction materials.
Zhi Lia, Xue-feng Qian, Jie Yina and Zi-kang Zhu, Gold tubes membrane with novel morphology replicated from ZnO template, Journal of Solid State Chemistry. 178 (2005) 1765–1772. 2.

The morphological structure of the powders was assessed by transmission electron microscopy (Tecnai F30, US FEI).
In fig. 3(b), there was unobvious morphological structure in T1, and multi-layer sheet was stacked together.
As the mass of EPS increased, in fig. 3(e) and (f), the long rhombus structure was transmitted to spherical structure, and the particle size was increased gradually, which indicated the particle size would increase as the density of explosive decrease.
A New Approach to the Preparation of Nitrogen-Doped Titania Visible Light Photocatalyst, Chemistry of Materials. 24 (2012) 636-642
Synthesis and characterization of sodium titanates Na2Ti3O7 and Na2Ti6O13, Journal of Solid State Chemistry. 177 (2004) 4508-4515

In order to further research the inner lattice structure, Cary 500 (UV-NIR) was used for characterization of the opal.
Figure 2 shows that the 270nm PS colloidal crystal has good lattice structure.
XRD was used to detect the crystal structure of SnO2 inverse opal.
Figure 5 is the crystal structure comparing between SnO2 sol gel (heated at 500 ℃ for 2 hours) and inverse opal.
Chemistry of Materials 2010, 22 (13), 4083-4089

Nanotubes present a good array structure and nanotubes are parallel and independent to each other.
It has a different deposition rate due to the differences of the nanopores surface structure in AAO template .
Nanotube structure is significantly in the Fig. 3c and 3d, and nanotube wall is uniform and continuous.
Wei: Progress in chemistry, Vol. 24 (2012) No.11, p.2143-2157.
Gabriel: Journal of Materials Chemistry, Vol. 21 (2011), p.7145–7153

Fenton Degradation of Methylene Blue by CuFeS2 Ultrafine Powders Daxin Liang1, a *, Jian Li1,b, Lu Li2,c and Guangsheng Pang2,d 1 Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University , Harbin 150040, China 2 State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China aliangdaxin@yahoo.com, b nefulijian@163.com, clilu.2428@163.com, dpangs@jlu.edu.cn Keywords: Fenton, degradation, CuFeS2, chalcopyrite, methylene blue Abstract.
Both the patterns correspond to the structure of JCPDS 37-0471.
[9] Montero Gerardo A., Smith Carl B., Hendrix Walter A., and Butcher Donald L., Supercritical Fluid Technology in Textile Processing: An Overview, Industrial & Engineering Chemistry Research, 2000. 39(12): 4806-4812
J., Joseph Jiju M., and Hoffmann Michael R., Synergistic Effects of Sonolysis Combined with Ozonolysis for the Oxidation of Azobenzene and Methyl Orange, The Journal of Physical Chemistry A, 2000. 104(39): 8930-8935
[19] Wojnarovits Laszlo and Takacs Erzsebet, Irradiation treatment of azo dye containing wastewater: An overview, Radiation Physics and Chemistry, 2008. 77(3): 225-244

As a technique to detect the characteristic of interphase, the interaction between molecules, the adsorption of surface molecules and the structure of molecules, SERS has the advantages of high sensitivity, large information quantity, non- disturbance by water and multicomponent measurement .
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. 1977, 84: 1-20
Journal of Materials Chemistry. 2011, 21: 5190-5202
Analytical Chemistry. 2011, 83: 9131-9137
Analytical and Bioanalytical Chemistry [J]. 2011, 403(1): 27-54

Thus, the reflection band presence at 1070 cm-1 indicates the predominance of Si–O–Si functional groups in the K8 glass in the framework structure.
Antropova, Synthesis and Study of Bismuth-Containing High-Silica Glass by the IR Spectroscopy Method, Glass Physics and Chemistry. 41 (2015) 93-97
Kruchinin, Effect of Iron Oxides in Sodium Borosilicates Glasses on their Water Resistance, The Soviet Journal of Glass Physics and Chemistry. 14 (1989) 337-341
Antropova, Study of the Iron-Containing Sodium Borosilicate Two-Phase Glasses and Porous Glasses by Optical Spectroscopy, Glass Physics and Chemistry. 42 (2016) 33-37
Bobkova, Physical chemistry of refractory nonmetallic and silicate materials [in Russian], Vysheyshaya shkola, Minsk, 2007

Polysilane as SiC Precursor: Preparation, Catalytic Cure and Pyrolysis HUANG Chuan-Jin 1, a, WANG Zhe-Hui 2,b, WANG Ming-Cun 1,c * 1 Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environmental, Beihang University, Beijing 100191, China 2 School of Chemical Engineering, Taishan Medical University, Tai’an 271016, China a hchuanjin@163.com, b wangzh@tsmc.edu.cn, c mcwang@iccas.ac.cn Keywords: Polysilane; Thermal cure; Pyrolysis; Promotion Abstract.
The process of polymer derived ceramic (PDC) has the advantages over other silicon carbide & its composite manufacturing ways including facile polymer shaping methods, low pyrolysis temperature (ceramization at 900-1500oC), microscopic component uniformity, and structure design diversity and performance tailorability [6-8].
Chemistry of materials, 5(1993) 260-279
Hayashi, et al, Chemistry Letters, (1976) 551-554
Journal of organometallic chemistry, 688(2003) 125-131

Vijayalakshmi2b, V.Narayanan1c* 1Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai –600 025, India. 2Department of Chemistry, S.D.N.B.
Introduction The coordination chemistry of tetraazamacrocycles with various substituents has been studied extensively [1].
In recent years, there has been considerable interest in the coordination chemistry of manganese(III) complexes with phenoxo bridging ligands [2].
Binuclear manganese(III) Schiff base complexes are of increasing interest because such dinuclear systems are known to act as a paramagnetic building block for multidimensional expanded structures and exchange interaction between paramagnetic centers of a large number of binuclear complexes has already received wide attention [3].