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PET Depolymerization Catalyzed by Sulfates under Microwave Irradiation Weilu Zhanga, Xiaoni Shib, Xin Zhangc, Chunhua Hand and Dong Zhange* Institute of Applied Chemistry, Wenzhou University, Wenzhou, Zhejiang, 325035, China azwl@wzu.edu.cn, bmingminer@163.com, czhangx123@163.com, dchanchwz@163.com, edzhang@wzu.edu.cn Keywords: Depolymerization; Sulfates catalysts; Microwave; Polarization force; PET Abstract.
According to the theories of Bernal and Morokuma, the structure of water would be destroyed by the addition of electrolytes, the solution represents different behaviors from pure water under microwave irradiation as a result[16,17].
Proton nuclear magnetic resonance (1H NMR, AVANCE 300, Bruker, Switzerland) Spectroscopies were used in the determination of the structure of chemicals after PET depolymerization.
Characterization of the final depolymerized chemicals The chemical structure of the depolymerized product TPA was analyzed by FT IR and 1H NMR.
The chemical structure of TPA was also confirmed by 1H NMR spectrum, and detail chemical shifts in DMSO-d6 were shown in Fig.3 (b).

This phenomenon was probably due to the fact that the molecular chains of protein in high LHWG concentration interacted with each other and formed a network structure more easily, and the increase of shearing rate would lead to protein aggregate, thereby significantly decreasing apparent viscosity [7, 8].
The value of Ea could be got by the slope of the straight line, which reflected the molecular mobility and was closely related to the size and geometric structures of macromolecules.
The differences between them were probably duo to the fact that XG and SA themselves had high viscosity when they were soluble in LHWG solution and were able to form intermolecular hydrogen bonds with protein molecules causing the network structure [4, 13].While gelatin, another protein, smaller in molecular weight than that of XG and SA, could be difficult to interact in this concentration with LHWG to form network structure [14].
Zhou and H.F.Qian: Food Chemistry, 102 (2007), 759-763

The diamond is a typical atomic crystal, while the crystalline structure of graphite appears in bedded shapes.
The graphitization of the surface of diamonds is essentially a processing of destruction and disassembly of the carbon atom covalent structure with SP3 structure on diamonds surfaces under the thermal field.
The chain structure in carbon bonding transformed from SP3 to SP2 under pressure, which results in the diamond-graphics transformation.
Chung and J.C Sung: Materials Chemistry and Physics, Vol. 72 (2001), p. 130-132 [2] W.May.

The molecular structures are shown in Fig.2.
The chelates can easily form citrate which is of three dimensional skeleton structure.
The appearance of the characteristic bands of NO3- and O-H indicate that the NO3- and O-H exist as groups in the structure of citrate gel
(1) (2) (3) Fig.2 molecular structures (1) Pure citric acid (2)(3) Chelates The features of TG and DTA profiles of the dried gel are presented in Fig.3.
Hbika et al.: International Journal of hydrogen Energy Vol. 5 (1980), P.173 [10] Dahui Wang, Yanping Zhong: Rare Metal Materials and Engineering Vol. 39 (2010), P.27 [11] T.Kohno, H.Yoshida, F.Kawashima et al.: Joural of Alloys and Compounds Vol. 311 (2000), P.L5 [12] Junfeng Liu,Yanghuan Zhang: Battery Bimonthly Vol. 39 (2009), P.181 In Chinese [13] A.Vadivel Murugan, B.B.Kale and Lalita B.Kunde: Sloid State Electrochem Vol. 10 (2006), P.104 [14] Jingxian Zhang, Xiaoming Tang and Yingliang Liu: Chinese Journal of Inorganic Chemistry Vol. 18 (2002), P.181 In Chinese [15] Jingxian Zhang, Peng Wang and Wenxin Chen: Journal of Jinan University (Natural Science) Vol. 24 (2003), P.42 In Chinese [16] Baiyu Qi, Xuanli Han and Rui Zhu.

The synthesis pathway of dioxins in sintering process Pg Dg + gas reaction Pg Ps Ps Dg precusors + the surface of catalysis de novo Cl, O, C, H heterogeneous catalysis Pg There are three synthesis pathways of dioxins in the sintering process[6]: (1) the dioxins in raw material itself has not been destroyed in the combustion and existed in the flue gas after sintering; (2) dioxins formatted by some ring structured precursors(chlorinated aromatic hydrocarbons) similar to dioxin’s structure due to the incomplete combustion of fuel in sintering process, dioxins formed by precursors’ molecules deconstruction or reorganization, that is so-called gas(homogeneous) reaction; (3) dioxins formatted by heterogeneous catalytic reaction on the surface of fly ash, that is to say the residual carbon, oxygen, hydrogen and chlorine in the fly ash formed the intermediate or dioxins by fly ash surface catalytic reaction, or the precursor of dioxins in the gas formed dioxins by catalytic reaction
The phenomenon that dioxins formed from the residual carbon on the fly ash was first found by Vogg and Stieglitz, then a serious research conducted by experiments, and gave the assume that PCDD/Fs and other aromatic compounds are formed by the oxidation and degradation of some microcrystalline structured carbon.
Then a two-step mechanism was proposed to explain the formation of halogenated organic compounds: the first step is the surface of carbon halogenated side by side, the step includes a mechanism of ligand transfer catalyzed by Cu2+ or Fe3+; the second step is the oxidize and breakdown of macromolecular structured carbon, this step is also catalyzed by metal ion of Cu2+ or Fe3+[11,12].  
References [1] Matsui M, Kashima Y, Kawano M : Chemosphere Vol.53(2003), p. 971 [2] Philip J A: Steel research and development on environmental issues1, Bilbao, 1999, p30 [3] Cieplik MK, Carbonell J P, Munoz C: Environ Sci Technol Vol. 37(2003), p.3323 [4] Anderson DR, Fisher R: Chemosphere 46(2002), p371 [5] Keiichiro Y, Toshiaki Y: Plasma Chemistry and Plasma Processing Vol.29 (2009), p.373 [6] Ficarella A, Laforgia D: Waste Management Vol. 20(2000), p.27 [7] Huang H, Buekens A: Chemosphere Vol. 38(1999), p.1595 [8]Michael S, Milligan E A: Environ.

Heterocyclic ring fused with benzene is one of the popular choices of mesogenic cores to be incorporated into the molecular structure.
In addition, the relationship between the molecular structure and liquid crystal properties is also discussed in this paper.
The presence of ordered smectic structure is important because it serves a potential interest in electrical studies for device application.
[19] Gray, G.W., Goodby J.W., Smectic Liquid Crystals: Textures and Structures, Leonard Hill, London, 1984
Hird, introduction to liquid crystals chemistry and physics, Taylor & Francis Ltd., London, 1998.

In the present research, Ni-B coating with compact structure and excellent properties was prepared by choosing borohydride as reducing agent by adding other complex to lower the plating temperature[6] in order to improve the stability of the bath, and effects of NaBH4 and heat-Treat on corrosion resistance of electroless plating Ni-B coating were investigated Experiment Preparation of Coating .
The amorphous structure presented in homogeneous single-phase system compared with the crystal structure because of its absence of grain boundaries, dislocations and stacking faults and other defects, and no second phase inclusions.
The coating structure was analyzed by X-ray diffraction after the samples’ 1h heat-treatment at 200 ℃, 400 ℃ and 600 ℃ respectively protected with argon, and the XRD results are shown in Fig.4.
Materials Chemistry and Physics, 2009, 54: 127-136

Introduction Transition metal dichalcogenide (TMD) materials with layered structure and band gaps around 1-2eV have attracted increasing attention due to their distinctive electrical and optical properties in the various fields such as electronic and optoelectronic devices [1-5].
It has a unique layered structure that is consists of S-Mo-S layers with strong covalent bonds [6, 9] whereas the adjacent layers are bound together by weak van der Waals interactions [10, 11, 12].
The Chemistry of Two-Dimensional Layered Transition Metal Dichalcogenide Nanosheets.
[10] Chen, Gongying & Lu, Benchu & Cui, Xinyu & Xiao, Jianrong, Effects of Deposition and Annealing Temperature on the Structure and Optical Band Gap of MoS2 Films.
Growth, structure, and friction behavior of titanium doped tungsten disulphide (Ti-WS2) nanocomposite thin films.

Once the carbonaceous solid residue from the pyrolysis process is obtained, the Brunauer-Emmett-Teller (BET) surface area analysis will be conducted on the porous materials to determine the microporous and mesoporous structure of the carbon.
The performance of AC, even at low doses, is attributed to the improvement in porosity and the development of a more efficient internal structure, generated by microwave radiation.
To further understand the performance of the activated carbon, surface morphology analysis revealed a well-developed porous structure, significantly increasing the available surface area for adsorption.
The presence of aromatic structures and oxygen-containing groups on its surface promote interactions with contaminants like arsenic, increasing its effectiveness in removal processes.
[3] Institute of Carbon Chemistry (ICB), "Chemical Processes for the Circular Economy: Pyrolysis of End-of-Life Tires and Plastic Pyrolysis," [Online].

Box 49, Budapest XII, Konkoly-Thege Miklós út 29-33, H-1121 Budapest, Hungary 5, 7 Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1., H6720 Szeged, Hungary a koszor@mfa.kfki.hu, bweber@mfa.kfki.hu, cvertesy@mfa.kfki.hu, dhorvath@mfa.kfki.hu, e konya@chem.u-szeged.hu, fbiro@mfa.kfki.hu, gkiricsi@chem.u-szeged.hu, harato@mfa.kfki.hu, ibalazsi@mfa.kfki.hu Keywords: singlewall carbon nanotubes, exfoliated graphite, silicon nitride, mechanical properties Abstract.
After the sintering the CNTs are preserved in the structure.
By increasing the nitrogen pressure from 2MPa to 20MPa for exfoliated graphite added samples, more densified structures were obtained.
The structures with higher density are also characterised by higher strength values.
Hui, Effectiveness of using carbon nanotubes as nano-reinforcements for advanced composite structures, Carbon 40 (2002) 1597-1617