Search results

However, report about the structure and the photocatalytic behavior of the complex vanadates such as BiVO4-InVO4 is scarce, so it is necessary to study on it.
In order to study the effect of indium content in photocatalyst on their phase structure and photocatalytic activity, the photocatalyst with various In3+ amount were obtained.
The InVO4 phase forms at the sintering temperature range of 600˚C-700˚C, and the InVO4 particles exhibit orthorhombic crystal structure( JCPDS 48-0898).
The effect of preparing parameters such as sintering temperature and indium content in particles on the structures and the photocatalytic activity has been studied.
L Jia, et al: Materials Chemistry and Physics Vol.103(2007), p. 162-167

However, due to its chemical nature, and in particular the presence of large amounts of aromatic structures, lignin may be an attractive raw material for the production of basic aromatic chemicals, such as benzene, toluene, xylene and phenol, overall reducing CO2 emissions and the need for fossil resources.
The implied that the EMAL structure was better retained than AL.
Lignins isolated from black liquor had a different structure from corn lignins, with less β-0-4 bonds and more carboxyl groups.
Food Chem., Vol,45(1997), p. 1212 [11] Hu J, Xiao R, Shen D, et al.: Bioresource technology, Vol, 128(2013), p. 633 [12] Lin, S.Y., Dence, C.W.: Methods in lignin chemistry.
(Ed.), Springer-Verlag, Berlin, New York. (1992) [13]Fengel, D., Wegener, G.: Wood – Chemistry, Ultrastructure, Reactions.

The most recent trends in designing three-phase catalytic reactors focus on the use of structured catalyst supports based on carbon nanofibers or nanotubes, i.e. the catalyst is deposited on a rigid, orderly arranged support body of carbon nanostructures.
This is due to their exceptional physical and chemical characteristics which include mainly (i) resistance to acid or base media, (ii) high length(μm)-to-diameter(nm) ratio (iii) high surface area (iv) absence of micro porosity (v) possibility to tune their surface chemistry (hydrophobicity/philicity) (vi) low tortuosity and hence high accessibility of the reactants to the deposited active phase (vii) being a rigid support body helps to eliminate the catalyst filtration step and none the less (viii) easy recovery of precious catalyst metals (e.g.
CNFs can be synthesized as a catalyst support upon structured internals of a microreactor, for example channels filled with ordered arrays of micropillars as illustrated in figure 1.
The structure and morphology of the grown CNF layers were investigated by High-Resolution Scanning Electron Microscopy (HR-SEM; LEO 1550 system equipped with in-lens and secondary electron detectors) and Energy Dispersive X-ray analysis (EDX; Thermo Noran Vantage system).
Kobayashi: Chemistry-an Asian Journal Vol. 1 (1-2) (2006), p. 22 [4] K.

Drofenik 1,2 1 Jožef Stefan Institute, Ljubljana Slovenia; 2 Faculty of Chemistry and Chemical Engineering, Maribor, Slovenia Keywords: Manganese Zinc Ferrite, Nanoparticles, Precipitation, Reverse Microemulsions ABSTRACT Nanocrystalline, superparamagnetic MnZn-ferrite particles with a narrow size distribution were prepared using precipitation in a reverse microemulsion system consisting of hexanol as an oil phase and CTAB as surfactant and aqueous solutions of Mn 2+, Zn 2+ and Fe 2+ sulfates.
The XRD pattern of this sample was composed only of broad reflections corresponding to the spinel structure.
The specific magnetization of all the prepared samples was very weak most probably due to the change in the structure of particles.
The surface layer of the particles is magnetically inactive due to surface relaxation of the structure or an asymmetric environment of the atoms near the surface.
[6] Lindman B. & Wennerström H., Micelles, Topic in Current Chemistry 87, Springer-Verlag, Berlin, 1980

To study the structure of the sized hydrated cellulose yarns, IR spectroscopy was used, carried out on a Specord M-80 spectrophotometer and an IRTracer-100 infrared Fourier spectrophotometer.
Development of viscose fibre technology, Fibre Chemistry. 40 (2008) 10-23
[3] Structure and physicochemical properties of celluloses and nanocomposites based on them: ed.
Bermeshev, Composite Fibers Based on Cellulose and Tetraetoxysilane: Preparation, Structure and Properties, Fibre Chemistry. 49 (2017) 101-107.

When the concentration of nano-Al2O3 particles is at 5.0 g.L-1and 10.0 g.L-1, emergence of two strongest peaks is observed at 2θ = 52.1° and 52.06° respectively that corresponds to (200) plane of face centered cubic (FCC) structure of Ni.
Effect of pulse plating parameters on the structure and properties of electrodeposited NieMo films, Materials Chemistry and Physics, Vol.175, pp215-222 [3] A.
Effect of pulse plating parameters on the structure and properties of electrodeposited Ni-Mo films.
Materials Chemistry and Physics, Vol.175, pp215-222 [13] Hong-xing WANG, Yan ZHANG, Jia-lin CHENG, Yu-shan LI (2015).

The molecular structures of agar and HEC were shown in Fig. 1a) and b), respectively.
Molecular structures of a) agar [9] and b) hydroxyethyl cellulose [10], including c) photograph example of agar-based ink modified with the additives.
Lahaye: Developments on gelling algal galactans, their structure and physico-chemistry (Kluwer Academic Publishers, Netherlands 2001)
Paunov: An ultra melt-resistant hydrogel from food grade carbohydrates (Royal Society of Chemistry Publishing, London UK 2017)

The Influence of Barium Compounds on the Formation of Portland Cement Clinker ZEZULOVÁ Anežka1,a *, STANĚK Theodor2,b and OPRAVIL Tomáš3,c 1,2Research Institute for Building Materials, Hněvkovského 65, 617 00 Brno, Czech rep. 3Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech rep.
Introduction Nowadays, the research in nuclear chemistry is a highly discussed topic.
The size difference of Ba2+ and Ca2+ ions (1.43 and 1.06 Å, resp.) causes changes in structure, according to XRD the dimensions of crystal lattice are changed. [1] Barium is already commonly used in calcite-sulphoaluminate cement.
Table 1: List of samples with a different amount and source of BaO Source of BaO Sample BaO [wt%] Source of BaO Sample BaO [wt%] – S0 0.0 BaCO3: 0.5C 0.5 BaSO4: 0.5S 0.5 1C 1.0 1S 1.0 2C 2.0 2S 2.0 3C 3.0 3S 3.0 4C 4.0 4S 4.0 5C 5.0 5S 5.0 13 raw meals were burnt by so called equilibrium burning to get a clinker with homogenous structure where all of CaO has reacted unless there is an influence on alite formation.
The clinker has a homogenous structure, all free CaO has reacted and C3A and C4AF have crystalized separately.

Hence, using the fluorescence  of phenanthrene under certain conditions can be a direct reflection of concentration of phenanthrene and its molecular structure change.
At the same time, there no fluorescence peaks appeared in the degradation reaction products, which further shows that potassium ferrate has complete degradation reaction to phenanthrene molecular structure.
When  to about 72 s, no obvious  fluorescence peaks was showed in the reaction system EEM, indicating that the phenanthrene molecular structure has been completely degraded by potassium ferrate at that stage and the reaction is close to be stable.
Chemistry, 2011, 74(2): 178 (in Chinese) [25] Yang, B.; Ying, G.
Chinese Journal of Analytical Chemistry, 2009, 37(9): 1328 (in Chinese) [27] Yu, D.

pH sensitive polysulfone membranes prepared by homogeneous photo-initiated graft copolymerization Helin Huaa, Junchao Zhangb, Na Lic, Li-an Wei d Department of Environment and Chemistry Engineering, Nanchang Hangkong University, No. 696, Fenghe South Road, Hongjiazhou District, 330063 Nanchang, P R China ahuahelin76@yahoo.com.cn, b527060823@qq.com, cxueimpossible@sohu.com, dweilian63@126.com Keywords:Polysulfone; Photo-initiated graft copolymerization; Acrylic acid; pH-senstitive.
Tetrahydrofuran (THF), acrylic acid (AAc), benzophenone (BP), ethyl ether, ethanol, sodium hydroxide, isopropyl alcohol, chlorohydric acid and N-Methyl-2-pyrrolidinone (NMP) were purchased from Peking Chemistry and Reagent Co..
Another possible explanation for the decrease in the DG at longer irradiation time is that the chain scissions of PSF caused by the direct absorption of the incident radiation by the basic backbone structure of PSF [19].
The morphology of the ungrafted and grafted membranes is very similar, except that the number of finger-like structure in grafted PSf-g-PAAc membranes is fewer but lager than that of the ungrafted membranes.
Additionally, the PSf-g-PAAc membrane with lower DG shows a less suppressed macropore structure and a thicker sponge-like layer at the bottom of the cross section.