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2012 International Conference on Future Optical Materials and Circuit Design(FOMCD 2012)

作者： Mariya G.Loriya Ayodeji A.Ijagbuji Alexei B.Tselishtev Ivan I.Zakharov Vladimir Dahl East Ukrainian National University Institute of Technology

The direct conversion of propane and butane fraction（existing as mixtures rather than separate products） to methanol as well as the reaction mechanism under visible light source（λ=420 nm） and the catalytic action of ·NO2 have been evaluated. The purpose of this work is to explore novel pathways for the production of methanol by suggesting a simplified model and result-oriented scheme to avoid the drawbacks associated with methane activation（incredibly high activation energy of about 440 k J/mol even under mild processing conditions） in the course of its transformation to methanol which is characterized by high yield and selectivity. It is important to consider propane and butane fraction（recovered from primary crude oil distillation and by cracking of heavy molecules） as a possible feedstock for methanol production exhibiting a sufficiently high degree of conversion per pass. Thereby, a relatively simple and economical method for methanol production from refined crude oil composed of propane and butane（a one step co-processing） have been tendered.

关键词： Propane-butane fraction photo oxidation Reaction mechanism Conversion to methanol

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Increased photo-catalytic removal of sulfur using titania/MWCNT composite

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Journal of Central South University 2016年第5期23卷 1066-1070页

作者： Molood Barmala Abdolsamad Zarringhalam Moghadam Mohammad Reza Omidkhah Chemical Engineering Department Tarbiat Modares UniversityJalal Ale Ahmad Highway

Titania coating of multi wall carbon nano tube(MWCNT) was carried out by sol-gel method in order to improve its photo catalytic *** effect of MWCNT/TiO_2 mass to volume ratio on adsorption ability,reaction rate and photo-catalytic removal efficiency of dibenzothiophene(DBT) from n-hexane solution was investigated using a 9 W UV *** results show that the addition of nanotubes improves the photo-catalytic properties of TiO_2 by two factors;however,the DBT removal rate versus MWCNT content is found to follow a bimodal *** factors are observed to affect the removal rate of DBT and produce two optimum values for MWCNT ***,large quantities of MWCNTs prevent light absorption by the solution and decrease removal *** contrast,a low dosage of MWCNT causes recombination of the electron holes,which also decreases the DBT removal *** optimum MWCNT contents in the composite are found to be 0.25 g and 0.75 g MWCNT per 80 m L of sol.

关键词： photo oxidation desulfurization sol-gel titania multi wall carbon nano tube (MWCNT)

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Acyl-chloride functionalized graphene oxide chemically grafted with hindered phenol and its application in anti-degradation of polypropylene

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Progress in Natural Science:Materials International 2020年第3期30卷 328-336页

作者： Jialu Yao Shixiang Liu Yajiang Huang Shijie Ren Yadong Lv Miqiu Kong Guangxian Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of China Sichuan University

In this study,graphene oxide (GO) nanosheets were first functionalized by the acyl-chloride reaction and then reacted with hindered phenol (HP) to obtain HP grafted GO (GO-g-HP).The GO-g-HP prepared under the optimized condition exhibited a high efficiency against both thermal and photo oxidation of isotactic polypropylene (iPP).GO-g-HP exhibited a much better anti-aging efficiency than that of HP and GO used individually or that of their physical *** outstanding anti-aging effect of GO-g-HP was attributed to the excellent synergistic effect produced between the chemically bonded GO and HP,which resulted in an improved oxygen barrier property of GO and excellent utilization of the free radical scavenging capability of GO and ***,thanks to the grafting of HP on GO,the physical loss of HP,which was one of the main shortcomings for traditional small molecular antioxidants,was largely *** is expected that the GO-g-HP prepared can well meet the requirement of long-term applications of polymers in some harsh service conditions.

关键词： Graphene oxide Hindered phenols Polypropylene Thermal oxidation photo oxidation

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Thionine sensitized areobic photooxidation of thiourea in acidic medium

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中国化学前沿:英文版 2011年第2期6卷 120-126页

作者： Rafia AZMAT Nida SALEEM Department of Chemistry Jinnah University for WomenKarachi 74600Pakistan

An investigation of the thionine sensitized aerobic photooxidation of thiourea was observed spectrophotometrically at a wavelength of 598 *** reported two types of reactions which generally occur in the presence of oxygen:1)Singlet oxygen,produced by dye sensitization due to the hydrolysis that reacts with thiourea to form oxidative products like urea and other sulfur-containing fragments and 2)bleaching of dye,which leads to the *** rate of reaction in all studied parameters followed first order kinetics with respect to maximum absorption of the dye in the visible band *** kinetics was significantly dependent upon the medium and the reaction accelerated more rapidly at low pH.A direct relation was exhibited between the thiourea concentration and dye sensitizer,which was not pragmatic with the concentration of *** reaction was effected by the temperature,and the values of energy parameters suggested that the energy of activation was low while the entropy of activation increases with the rise in temperature,which indicated a highly solvated state of intermediate *** value of ΔH* and ΔG*at elevated temperature showed that free energy is the driving force for the completion of reaction.A mechanism based on the above findings has been suggested.

关键词： thionine sensitized photo oxidation thiourea singlet oxygen fragment

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Light Yellowness of Down Duvet

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Journal of Donghua University(English Edition) 2017年第2期34卷 216-220页

作者：王宗乾李长龙孙瑞霞刘晨 College of Textiles and Fashion Anhui Polytechnic University Wuhu 241000 China

The yellowness of new processed down duvet after exposure to light irradiation seems very mysterious,degree of its yellowness sometimes minor,other times serious,seemingly *** it is very essential for down duvet manufacturers to figure out the cause of this *** yellowed down duvet was split into two parts firstly,one was the external fabric which treated with antidrilling finish of polyurethane(PU) in advance,the other was filled *** showed that yellowing of external fabric was serious while the filled down yellowness was not ***,when the external fabric and the filled down from the same batch of duvet were irradiated under the same condition respectively,the result indicated both the external fabric and the filled down had not yellowed as the above ***,it was inferred that the external fabric's yellowing was possibly induced by one property of the filled *** the key performance indicators of the filled down,such as cleanliness,oxygen consumption,and microorganisms,were measured and analyzed,and the extraction liquid of the down was also analyzed by the chromogenic reaction and UV-vis *** indicated the non-decomposed hydrogen peroxide residued in the filled down which would cause a higher oxygen consumption and induce photo oxidation yellowing of the PU film on external fabric,and the degree of its yellowing increased with the concentration of residual hydrogen peroxide *** peroxide composition would speed up the photo oxidation yellowing process and decrease the IR transmittance of PU *** its yellowed degree aggravating.

关键词： down light yellowness whiteness polyurethane (PU) film photo oxidation

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