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Formation of the Inclusion Complex of orange ⅱ with β-Cyclodextrin and Its Photostability

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Wuhan University Journal of Natural Sciences 2003年第4期 1147-1152页

作者： Lu Ping 1,2 , Liu Bin 1,3 , Zhang Zhe 1 , Wu Feng 1 , Deng Nan-sheng 1 1. College of Resource and Environmental Science, Wuhan University, Wuhan 430072, Hubei, China 2. School of Chemistry and Environmental Engineering, Jianghan University , Wuhan 430056, Hubei, China 3. Department of Environmental and Chemical Engineering, Huangshi Polytechnic College, Huangshi 435003, Hubei, China

Inclusion complex of orange II with β-Cyclodextrin （β-CD） and the anti-photolysis effect under UV-light were investigated. The molar ratio of inclusion complex of β-Cyclodextrin and orange ⅱ is 1∶1. The formation constant K=1.236×10 3 L/mol was determined by the UV and Fluorescence spectra respectively, which was quite in accordance with the calculation with a modified Benesi-Hildbrand equation. The inclusion complex was characterized by the IR spectra and the molar ratio of inclusion complex is 1∶1 too. The formation constant K=1.266×10 3 L/mol was determined by 1 H NMR analysis and was nearly the same by UV and fluorescence spectra. The photocatalytic decolorization rate of orange ⅱ solutions containing β-CD and TiO_ 2 was smaller by 51.9% than that of the orange ⅱ solutions only containing TiO_ 2 , while in the case of direct photolysis of orange ⅱ solutions, β-CD can lower the photolysis rate by 48.1% under UV-light. This result indicates β-CD can inhibit the photolysis and photocatalytic decolorization of orange ⅱ under UV-light. The β-CD inclusion complex was found to be persistent to UV-light photolysis.

关键词： β-Cyclodextrin orange ⅱ inclusion complex photostability

Formation of the Inclusion Complex of orange ⅱ with β-Cyclodextrin and Its Photostability

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Wuhan University Journal of Natural Sciences 2003年第4A期8卷 1147-1152页

作者： LuPing LiuBin ZhangZhe WuFeng DengNan-sheng CollegeofResourceandEnvironmentalScience WuhanUniversityWuhan430072HubeiChina DepartmentofEnvironmentalandChemicalEngineering HuangshiPolytechnicCollegeHuangshi435003HubeiChina

Inclusion complex of orange II with β-Cyclodextrin (β-CD) and the anti-photolysis effect under UV-light were investigated. The molar ratio of inclusion complex of β-Cyclodextrin and orange ⅱ is 1∶1. The formation constant K=1.236×10 3 L/mol was determined by the UV and Fluorescence spectra respectively, which was quite in accordance with the calculation with a modified Benesi-Hildbrand equation. The inclusion complex was characterized by the IR spectra and the molar ratio of inclusion complex is 1∶1 too. The formation constant K=1.266×10 3 L/mol was determined by 1 H NMR analysis and was nearly the same by UV and fluorescence spectra. The photocatalytic decolorization rate of orange ⅱ solutions containing β-CD and TiO_ 2 was smaller by 51.9% than that of the orange ⅱ solutions only containing TiO_ 2 , while in the case of direct photolysis of orange ⅱ solutions, β-CD can lower the photolysis rate by 48.1% under UV-light. This result indicates β-CD can inhibit the photolysis and photocatalytic decolorization of orange ⅱ under UV-light. The β-CD inclusion complex was found to be persistent to UV-light photolysis.

关键词： β-Cyclodextrin orange ⅱ inclusion complex photostability

Production and contribution of hydroxyl radicals between the DSA anode and water interface

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Journal of Environmental Sciences 2011年第5期23卷 744-748页

作者： Guoting Li Meiya Zhu Jing Chen Yunxia Li Xiwang Zhang Department of Environmental and Municipal Engineering North China University of Water Conservancy and Electric Power Zhengzhou 450011 China. E-mail: liguoting@*** School of Civil and Environmental Engineering Nanyang Technological University 639798 Singapore

Hydroxyl radicals play the key role during electrochemical oxidation and photoelectrochemical oxidation. The production and effect of hydroxyl radicals on the interface between DSA anode and water was investigated by examining the quenching effect of iso-propanol on orange II decolorization. We observed that with an increase in electrode potential from 4 to 12 V across electrodes at pH 7.0, the contribution percentage of hydroxyl radicals increased dramatically. More OH radicals were produced in acidic and alkaline conditions than at neutral conditions. At electrode potential of 4 V, the contribution percentage of hydroxyl radicals was obviously higher at near neutral pH conditions, while removal efficiency of orange/I achieved was the lowest concurrently. Finally, for photocatalytic oxidation, electrochemical oxidation, and photoelectrochemical oxidation using the same DSA electrode, the effect of hydroxyl radicals proved to be dominant in photocatalytic oxidation but the contribution of hydroxyl radicals was not dominant in electrochemical oxidation, which implies the necessity of UV irradiation for electrochemical oxidation during water treatment.

关键词： hydroxyl radicals DSA electrode photoelectrocatalysis orange ⅱ

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New Application of Stainless Steel

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Journal of Iron and Steel Research(International) 2006年第1期13卷 62-66页

作者： YANG Jia-long LI Ying WANG Fu ZANG Zheng-gui LI Si-jun College of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China Ironmaking Plant Wuhan Iron and Steel Group Co Wuhan 430083 Hubei China

Several rigid substrates such as stainless steel, titanium alloy, aluminum alloy, nickel foil, silicon, and sodium lime glass have been employed for manufacturing high quality TiO2 films by metal organic chemical vapor deposition （MOCVD）. The as-deposited TiO2 films have been characterized with SEM/EDX and XRD. The photocatalytic properties were investigated by decomposition of aqueous orange ⅱ. UV VIS photospectrometer was employed to check the absorption characteristics and photocatalytic degradation activity. The results show that films synthesized on metal substrates display higher photoactivities than that on absolute substrates such as silicon and glass. It is found that solar light is an alternative to UV-light used for illumination during photodegradation of orange ⅱ. TiO2 film on stainless steel substrate was regarded as the best one for photocatalysis.

关键词： MOCVD photodegradation orange ⅱ metal substrate inert substrates

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