通过臭氧介孔的γ-Ti-Al2O3悬浮液的表面氧化来增强药物的矿化作用,Applied Catalysis B: Environment and Energy

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通过臭氧介孔的γ-Ti-Al2O3悬浮液的表面氧化来增强药物的矿化作用
Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2016-09-14 01:12:39
Jishuai Bing, Chun Hu, Lili Zhang

钛掺杂的介孔的γ-Al ₂ ö ₃（γ-Ti系的Al ₂ ö ₃）通过蒸发引起的自组装方法制备和表征通过X射线衍射，X射线光电子能谱，氮吸附-解吸，扫描电子显微镜和化学吸附吡啶的FTIR光谱。γ-Ti系的Al ₂ ö ₃揭示的6种药物在水溶液中，包括布洛芬，磺胺甲恶唑，苯妥英，苯海拉明，双氯酚酸钠和阿昔洛韦矿化优异的催化臭氧化的活性和稳定性。表征研究表明钛被纳入的框架的γ-Al ₂ ö ₃通过AlOTi联动，定位在四面体配位的位点，其增加的γ-Al的路易斯酸位点₂ ö ₃，特别是中等酸位点。在γ-Ti-Al ₂ O ₃悬浮液的基础上，臭氧催化分解生成的表面原子氧（Al ^3- * O）和过氧化物种类（Ti ⁴⁺ -* O ₂）是普遍产生的，而不是羟基自由基。电子顺磁共振（EPR）和原位拉曼测量。此外，通过表面原子氧和过氧化物种类的共同作用，证实了受试药物的高矿化度来自有机酸中间体的表面氧化。

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Enhanced mineralization of pharmaceuticals by surface oxidation over mesoporous γ-Ti-Al2O3 suspension with ozone

Titanium-doped mesoporous γ-Al₂O₃ (γ-Ti-Al₂O₃) was prepared by an evaporation-induced self-assembly method and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption, scanning electron microscope, and FTIR spectra of chemisorbed pyridine. γ-Ti-Al₂O₃ revealed excellent catalytic ozonation activity and stability for mineralization of six drugs in aqueous solution, including ibuprofen, sulfamethoxazole, phenytoin, diphenhydramine, diclofenac sodium and acyclovir. The characterization studies showed that titanium was incorporated into the framework of γ-Al₂O₃ by AlOTi linkage, locating at tetrahedrally coordinated sites, which increased the Lewis acid sites of γ-Al₂O₃, especially the medium acid sites. The surface atomic oxygen (Al³⁻*O) and peroxide species (Ti⁴⁺−*O₂) were commonly generated rather than hydroxyl radical from catalytic decomposition of ozone in γ-Ti-Al₂O₃ suspension on the basis of the electron paramagnetic resonance (EPR) and in situ Raman measurements. Furthermore, it was verified that the high mineralization of the tested pharmaceuticals came from the surface oxidization of organic acid intermediates by the common role of the surface atomic oxygen and peroxide species.

更新日期：2016-09-14

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