Abstract The application of nanoparticle heterogeneous Fenton-like catalysts is limited due to the requirement of filtration after reaction and possible secondary pollution. In this work, a novel mesh-type monolithic Fenton-like Cu/Fex/γ-Al2O3/Al catalyst was developed for the degradation of dyes. The Cu and Fe species are uniformly dispersed on the mesh-type anodic monolithic γ-Al2O3 supports, and the results of scanning electron microscopy and X-ray diffractometry analysis show that Fe can reduce the particle size of Cu over γ-Al2O3. The activity results show that the degradation rate of rhodamine B (RhB) reached 99.5% within 1 h using 4 × 6 cm Cu12.0/Fe2.0/γ-Al2O3/Al catalyst with 1,200 ppm H2O2 at 50 °C. The important role of •OH as a reactive oxidant was confirmed through electron spin-resonance spectroscopy and radical scavenging experiment. The hydrogen temperature programmed reduction suggests the high redox ability of Cu/Fe bimetallic catalyst is beneficial to the production of •OH. The Cu/Fe bimetallic catalyst shows excellent recyclability in a 10-cycle experiment, the degradation rate of RhB was maintained at 98% and the leaching amount of metals was lower than 0.7 mg/L. The mesh-type catalyst will be easily applied for the continuous wastewater treatment because it does not need filtration for recovery.

中文翻译：

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网状类Fenton Cu/Fex/γ-Al2O3/Al催化剂的研制及其在染料催化降解中的应用

摘要由于反应后需要过滤且可能产生二次污染，纳米颗粒非均相类芬顿催化剂的应用受到限制。在这项工作中，开发了一种新型网状整体类芬顿 Cu/Fex/γ-Al2O3/Al 催化剂用于染料的降解。Cu和Fe物种均匀分散在网状阳极整体式γ-Al2O3载体上，扫描电子显微镜和X射线衍射分析结果表明，Fe可以降低γ-Al2O3上Cu的粒径。活性结果表明，使用 4 × 6 cm Cu12.0/Fe2.0/γ-Al2O3/Al 催化剂和 1,200 ppm H2O2，在 50 °C 下，1 h 内罗丹明 B (RhB) 的降解率达到 99.5%。通过电子自旋共振光谱和自由基清除实验证实了·OH作为活性氧化剂的重要作用。氢气程序升温还原表明Cu/Fe双金属催化剂的高氧化还原能力有利于·OH的产生。Cu/Fe双金属催化剂在10次循环实验中表现出优异的可回收性，RhB的降解率保持在98%，金属浸出量低于0.7 mg/L。网状催化剂由于不需要过滤回收，因此很容易应用于连续废水处理。