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College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, China a uzzylzhao@163.com Keywords: photocatalyst; sol-gel method; S, Sr-codoped TiO2; photocatalytic activity Abstract: S, Sr-codoped TiO2 were prepared by sol-gel mothod, using titanium (IV) n-butoxide, strontium nitrate and thiourea as precursors.
The surface acidity and structure of the samples were characterized by a Fourier infrared spectroscopy (FTIR).
The S, Sr codoped particles took an overlapped porous structure.
The XRD results confirm that the S, Sr-TiO2 samples are single-phase anatase structures.
SEM micrographs reveal that the codoped particles took an overlapped porous structure.

This paper investigates the influence of ZnS buffer layer by magnetron sputtering,and analyses structure,surface topography,and optical properties of ZnS films by using X-ray diffraction (XRD), UV-spectroscopy measurements and scanning electronic microscope (SEM) analysis techniques.
Findings show that the high-quality ZnS thin films with a good crystallinity and optical properties, which is zinc blende cubic structure with a preferred orientation, can be grown by sputtering at 300W and 0.6Pa.
Apparently, the steepest optical absorption edge is observed in the ZnS thin film obtained by sputtered for 0.6Pa , indicating its good crystallinity and homogeneous distribution in the film composition and grain size.The band gap information is given by the following formula [4] , (1) where λ is the steep jumping wavelength in Fig. 4.When pressure is 0.6Pa,the absorption edge takes place at 354 nm,corresponding to Eg is 3.50eV.When pressure is 1Pa,the sharp absorption edge takes place at 371 nm, corresponding to Eg is 3.34eV.The band gap of zinc blende cubic structure β-ZnS lies in the range 3.5-3.6eV,the band gap of hexagonal wurtzite structure α-ZnS is around at 3.8eV.The calculated results have shown the ZnS has a (111) orientation while the sputtering power and pressure is 300W and 0.6Pa.As we can see,the numerical value less than3.6eV,it's caused by sulphur defect in the course of growth [5] .
References [1]L Meng-kai.Solid State Chemistry[M].
[4]HUANG Hui-Fen.Investigation on composition and structure of ZnS:Mn evaporation films with sulfur supply[J].Vacuum,1999,55:127-131

Hydrotalcite-like compounds (HTlc), also called Layered double hydroxides (LDH) [4] are anion clays possessing special layer structures which are constructed by positively charged brucite-like layers with interlamellar exchangeable anions located, as water molecules, in the interlayer space.
The lamellar structure and anion exchange capacity of HTlc allow the formation of a wide range of host–guest complexes and can be widely utilized in many fields such as catalysts and catalyst precursors, anionic exchangers, sorbents, etc. [5].
The structure of samples were characterized by powder X-ray diffraction (XRD) analysis with a Philips XPert MPD diffractometer using monochromatic Cu Kαradiation (λ= 1.5418 Å), operating at 40 kV and 40 mA.
The complex of zinc salicylate incorporated into MgAl-LDH did not decompose until 357°C, compared with pure complex of zinc salicylate at (345–520°C) [7], the thermal stability is obviously enhanced, which may attribute to the protection effect of layer structure.
Xu: Journal of Physical Chemistry C Vol. 113 (2009), p.17206 [7] Z.

Hydrostatic Extrusion resulted in impaired grain structure.
Hydrostatic extrusion with accumulated strain 2.8 or higher results in a nano-structure titanium.
Fig. 2 presents transmission electron microscopy images of nano-structure.
TEM image of structure of nano-crystalline Ti sample a) Ø12mm b) Ø7mm.
In case Ø7 sample, the structure reorganization occurs in nanostructure.

The material's success was demonstrated by various characterizations like the hysteresis loops of the Nitrogen adsorption-desorption curves, the X zeolitic structure through X-ray diffraction (XRD) patterns, and the morphology by scanning electron microscopy (SEM) – energy dispersive X-ray (EDX) spectroscopy analysis.
The proposed solution is that in the structure of the zeolite, there must be holes bigger than the micro ones acting as pathways for the easy molecule diffusion to reach the deeper cavity active sites [8].
Besides, as mentioned above, green chemistry is an attempt to use non-toxic substances [15].
(a) (b) Figure 1: Nitrogen physisorption results of the parent zeolite X and the mesoporous ones Figure 2: XRD patterns of all samples As can be seen from Figure 2, the attendance of the FAU characteristic peaks (JCPDS-12-0246) in all XRD patterns shows the successful synthesis of the initial NaX and the structured preservation when modifying it by the acid leaching process.
Errayes, Green chemistry: principles, applications, and disadvantages, Chem.

Crystal structure, surface topography and absorption edge of the thin films have been studied by X-ray Diffraction technique, Atomic Force Microscopy and UV-VIS Spectroscopy.
Pt thin film of 20 nm thickness was deposited by dc magnetron sputtering to fabricate comb-like electrodes and micro-structures.
The standard photolithography and subsequent Ar ion beam etching was used to pattern comb-like micro-structures.
Grimes: Synthesis and applications of electrochemically self-assembled titania nanotube arrays :Physical Chemistry Chemical Physics Vol. 12 (2010), pp. 2780-2800
Weberet: Synthesis of photocatalytic TiO2 nanoparticles: optimization of the preparation conditions: Journal of Photochemistry and Photobiology A: Chemistry Vol. 157 (2003), p. 49

The atomic honeycomb structure of the crystal lattice gives to graphene unique electronic properties.
These goals can only be achieved by the joint efforts of chemistry, biomedicine, materials science, nanotechnology, physics, mathematical modelling.
Moradi, Plasmonic wave propagation mode analysis of single and multi-layer graphene-pec structures, Optik 200 (2020) 163365, https://doi.org/10.1016/j.ijleo.2019.163365
Schmuttenmaer, Conductivity of ZnO Nanowires, Nanoparticles, and Thin Films Using Time-Resolved Terahertz Spectroscopy, Journal of Physical Chemistry B 110 (2006) 25229-25239
Poh, Graphene for electrochemical sensing and biosensing, Trends in Analytical Chemistry 29(9) (2010) 954-965, doi: 10.1016/j.trac.2010.05.011

Synthesis of carbon onions with high purity by chemical vapor deposition Chen Leishan 1,a and Wang Cunjing 1,b College of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang 453003, China aemail: chenleishan@yahoo.cn; bemail: wangcunjing@126.com Keywords: Onion-like fullerenes; Aluminum hydroxide; Irion; Chemical vapor deposition Abstract.
The results show that carbon onions surrounding Fe3C core were obtained using the catalyst containing 0.3 wt% iron and these carbon onions had a structure of stacked graphitic fragments, with diameters in the range 15-50 nm.
In addition to catalyst, reaction temperature, which acts as the reaction driving force in CVD, determining the structure and morphologies of the product, is also an important factor in CVD.
The metallic core was encapsulated by carbon layers, which was the typical structure of carbon onions filled with metallic cores, however, the carbon layers of the carbon onions were not arranged as concentric graphitic layers but as a structure of stacked graphitic fragments.
The nanoparticle had the typical structure of carbon onions encapsulating metallic cores and a structure of stacked graphitic fragments.

The structure of polyureas was characterized and thermal properties were measured by TGA and DSC.
The reactivity is influenced by the structure of isocyanate and amine.
These characteristic bands showed that the samples possessed the structure of diethyl amide, just as expected.
The chemistry structure of amine has much to do with the lone pair electrons of nitrogen atom.
The results showed that the curing process of polyurea with E300 had appropriately reaction activity due to E300’s large volume benzene molecular structure.

Also, the chemical structure of tall oil constituents can be easily functionalized for further polymer development [6].
Although resin acids also have unsaturated bonds, their cyclic structure makes it harder for reactions such as epoxidation to occur.
For DEOA polyols, stretching peak vibrations of the amide groups related to the structure can be observed at 1625 cm-1.
Tang, “Sustainable polymers from biomass: Bridging chemistry with materials and processing,” Progress in Polymer Science, vol. 101.
Ionescu, Chemistry and technology of polyols for polyurethanes.