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首页> 外文期刊>Materials Science and Engineering >Applications of sunlight responsive Fe-Ag-TiO_2 composite incorporating in-situ dual effect for the degradation of pentoxifylline
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Applications of sunlight responsive Fe-Ag-TiO_2 composite incorporating in-situ dual effect for the degradation of pentoxifylline

机译：原位双重效应的日光响应Fe-Ag-TiO_2复合材料在己酮可可碱的降解中的应用

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摘要

Silver modified TiO2 based immobilized system incorporating in-situ dual effect (photocatalysis and photoFenton) was examined for the degradation and mineralization of an environmentally persistent drug, pentoxifylline (PEN) under natural sunlight. The modified TiO2 was characterized through DRS, XRD, SEM/EDS, TGA, XPS, FTIR, and Raman spectroscopy to confirm the distribution of Ag on TiO2 surface. Ag-TiO2-P25 exhibited better degradation efficiency with high rate constant i.e. 0.055 min(-1) in comparison to 0.037 min(-1) (unmodified TiO2-P25). Attempts were made to enhance the degradation efficiency of system by incorporating insitu dual effect in fixed-mode using Ag.TiO2 -P25. Novel clay beads using waste fly-ash and foundry sand were used for Ag-TiO2-P25 immobilization (Fe-Ag-TiO2 composite). The value of rate constant was augmented to 0.132 min(-1) with dual process. The practical feasibility of technique was validated by conducting the degradation of PEN in a solar pilot-scale reactor with total volume handling of 5 L using Fe-Ag-TiO2 composite.
机译：结合原位双重效应（光催化和光芬顿）的银改性的基于TiO2的固定化系统，研究了在自然阳光下对环境持久性药物己酮可可碱（PEN）的降解和矿化作用。通过DRS，XRD，SEM / EDS，TGA，XPS，FTIR和拉曼光谱对改性后的TiO2进行了表征，以确认Ag在TiO2表面的分布。与0.037 min（-1）（未改性的TiO2-P25）相比，Ag-TiO2-P25具有较高的降解效率，具有较高的速率常数，即0.055 min（-1）。尝试通过使用Ag.TiO2-P25在固定模式下结合原位双重效应来提高系统的降解效率。使用废粉煤灰和铸造砂的新型粘土珠被用于固定Ag-TiO2-P25（Fe-Ag-TiO2复合材料）。双重处理将速率常数的值增加到0.132 min（-1）。通过在太阳能中试规模反应器中使用Fe-Ag-TiO2复合材料处理总体积为5 L的PEN进行降解，验证了该技术的实际可行性。

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