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首页> 外文期刊>RSC Advances >Degradation of p-nitrophenol using CuO/Al2O3 as a Fenton-like catalyst under microwave irradiation
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Degradation of p-nitrophenol using CuO/Al2O3 as a Fenton-like catalyst under microwave irradiation

机译：微波辐射下以CuO / Al2O3为类Fenton催化剂降解对硝基苯酚

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摘要

CuO/Al2O3 was synthesized successfully by the impregnation-deposition method and used as a heterogeneous catalyst in a microwave assisted Fenton-like process (MW/FL). The morphology and physico-chemical properties of the CuO/Al2O3 catalyst were characterized using field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) analysis. The degradation of p-nitrophenol (PNP) was investigated by different processes, including microwave irradiation (MW) alone, hydrogen peroxide (H2O2) oxidation under microwave irradiation without the catalyst (MW/H2O2), a Fenton-like (FL) process, a MW/FL process and a thermallyassisted Fenton-like (TH/FL) process. The results showed that the CuO/Al2O3 catalyzed MW/FL could generate more hydroxyl radicals ((OH)-O-center dot) and remove PNP more effectively compared to other processes. The effects of initial pH, dosage of H2O2 and catalyst, microwave power and radiation time, and PNP concentration on the removal efficiency were also studied. The results showed that 93% removal efficiency of PNP was obtained within 6 min under optimized conditions. Moreover, the catalyst had a good stability and reusability, thus expanding the scope of non-iron based catalysts in the Fenton-like reactions.
机译：通过浸渍沉积法成功合成了CuO / Al2O3，并在微波辅助Fenton-like工艺（MW / FL）中用作多相催化剂。使用场发射扫描电子显微镜（FESEM），X射线衍射（XRD）和Brunauer-Emmett-Teller（BET）分析对CuO / Al2O3催化剂的形貌和理化性质进行了表征。通过不同的方法研究了对硝基苯酚（PNP）的降解，包括单独的微波辐射（MW），在无催化剂的微波辐射下（MW / H2O2）氧化过氧化氢（H2O2），类似于Fenton（FL）的过程， MW / FL工艺和热辅助类Fenton（TH / FL）工艺。结果表明，与其他工艺相比，CuO / Al2O3催化的MW / FL可以产生更多的羟基自由基（（OH）-O-中心点），并更有效地去除PNP。还研究了初始pH，H2O2和催化剂的用量，微波功率和辐射时间以及PNP浓度对去除效率的影响。结果表明，在最佳条件下，在6分钟内可获得93％的PNP去除率。此外，该催化剂具有良好的稳定性和可重复使用性，从而扩大了类芬顿反应中非铁基催化剂的范围。

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