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首页> 外文期刊>Separation and Purification Technology >Mesoporous silica iron-doped as stable and efficient heterogeneous catalyst for the degradation of C.I. Acid Orange 7 using sono-photo-Fenton process
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Mesoporous silica iron-doped as stable and efficient heterogeneous catalyst for the degradation of C.I. Acid Orange 7 using sono-photo-Fenton process

机译：掺杂介孔二氧化硅铁可作为稳定高效的多相催化剂降解C.I.酸橙7使用声光Fenton工艺

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摘要

Iron-containing mesostructured silica (Fe2O3/SBA-15) was prepared and used as heterogeneous catalyst in the integrated sono-photo-Fenton process. The effect of hydrogen peroxide concentration, initial pH, Fe2O3/SBA-15 loading, ultrasonic power, and initial solution concentration on the decolorization of C.I. Acid Orange 7 (AO7) by the integrated heterogeneous sono-photo-Fenton process was investigated in order to optimize process efficiency. The results showed that the decolorization efficiency increased with the increase of hydrogen peroxide concentration, ultrasonic power, Fe2O3/SBA-15 loading, but decreased with the increase of initial pH and initial dye concentration. Catalyst stability was evaluated by measuring iron leaching in solution. The particles size distribution of spent catalyst evidenced a remarkable size reduction during reaction, leading to more reactive surface and higher mass transfer rate. The main reaction intermediates were separated and identified using GC-MS and a possible degradation pathway was proposed.
机译：制备了含铁的介孔结构二氧化硅（Fe2O3 / SBA-15），并在声光-芬顿集成工艺中用作多相催化剂。过氧化氢浓度，初始pH，Fe2O3 / SBA-15负载量，超声功率和初始溶液浓度对C.I.脱色的影响。为了优化工艺效率，对集成的异质声光芬顿工艺研究了酸性橙7（AO7）。结果表明，脱色效率随过氧化氢浓度，超声功率，Fe2O3 / SBA-15负载量的增加而增加，但随初始pH值和初始染料浓度的增加而降低。通过测量溶液中铁的浸出来评估催化剂的稳定性。废催化剂的粒度分布证明反应过程中尺寸明显减小，从而导致更多的反应表面和更高的传质速率。使用GC-MS分离和鉴定了主要的反应中间体，并提出了可能的降解途径。

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