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Enhanced Stability of Abundant Amorphous Iron (III) oxide Grafted AlSBA‐15 as Highly Efficient Heterogeneous Fenton Catalyst for the Destruction of Phenol
ChemistrySelect ( IF 1.9 ) Pub Date : 2019-06-27 , DOI: 10.1002/slct.201901510 Kulandaivel Thirumoorthy 1 , Govindaswamy Satishkumar 1
ChemistrySelect ( IF 1.9 ) Pub Date : 2019-06-27 , DOI: 10.1002/slct.201901510 Kulandaivel Thirumoorthy 1 , Govindaswamy Satishkumar 1
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24 wt% of iron has been successfully grafted as amorphous iron oxide over mesoporous channels of SBA‐15 and 10 wt% alumina coated SBA‐15 (AlSBA‐15) using selective extraction deposition (SED) technique. The synthesized materials have been characterized using XRD, N2 adsorption studies, SEM‐EDS, 27Al MAS NMR, XPS, H2‐TPR, and HR‐TEM techniques. 27Al MAS NMR and XPS characterization results revealed that iron has been preferentially grafted over alumina. The increased binding energy of the Fe2p electron (XPS) in the 24wt %Fe/AlSBA‐15 confirms the existence of strong donor‐acceptor interaction between grafted iron oxide and an alumina support. In TPR studies, unlike silica support, AlSBA‐15 tuned the reduction property of various grafted oxidic iron species, which is evidenced by shifting of iron reduction peak to a high temperature of 436 °C. In the destruction of 200 ppm of phenol 24wt %Fe/AlSBA‐15 catalyst demonstrated 100% phenol conversion and 86% TOC removal with 0.4 ppm (0.1%) iron leaching within 30 minutes of reaction. 24wt %Fe/SBA‐15 catalyst also exhibited similar performance however, leaching of iron was found to be up to 20 ppm (8%). The 24wt %Fe/AlSBA‐15 catalyst was recycled successfully five times without loss in the catalytic activity and stability.
中文翻译：
增强的AlSBA-15接枝的丰富无定形氧化铁（III）的稳定性，可作为破坏苯酚的高效多相Fenton催化剂
已通过选择性萃取沉积（SED）技术成功地将24 wt％的铁作为无定形氧化铁接枝到SBA-15的介孔通道和10 wt％的氧化铝包覆的SBA-15（AlSBA-15）上。使用XRD，N 2吸附研究，SEM-EDS，27 Al MAS NMR，XPS，H 2 -TPR和HR-TEM技术对合成材料进行了表征。27Al MAS NMR和XPS表征结果表明，铁比氧化铝优先被接枝。在24wt％Fe / AlSBA-15中，Fe2p电子（XPS）的结合能增加，证实了接枝的氧化铁与氧化铝载体之间存在强的供体-受体相互作用。在TPR研究中，与二氧化硅载体不同，AlSBA-15调节了各种接枝氧化铁物种的还原性能，这可以通过将铁还原峰移至436°C的高温来证明。在销毁200 ppm苯酚中，24wt％Fe / AlSBA-15催化剂表现出100％的苯酚转化率和86％的TOC去除率，反应30分钟内浸出0.4 ppm（0.1％）的铁。24wt％Fe / SBA-15催化剂也表现出相似的性能，但是，发现铁的浸出高达20 ppm（8％）。
更新日期：2019-06-27
中文翻译：
增强的AlSBA-15接枝的丰富无定形氧化铁（III）的稳定性，可作为破坏苯酚的高效多相Fenton催化剂
已通过选择性萃取沉积（SED）技术成功地将24 wt％的铁作为无定形氧化铁接枝到SBA-15的介孔通道和10 wt％的氧化铝包覆的SBA-15（AlSBA-15）上。使用XRD，N 2吸附研究，SEM-EDS，27 Al MAS NMR，XPS，H 2 -TPR和HR-TEM技术对合成材料进行了表征。27Al MAS NMR和XPS表征结果表明，铁比氧化铝优先被接枝。在24wt％Fe / AlSBA-15中，Fe2p电子（XPS）的结合能增加，证实了接枝的氧化铁与氧化铝载体之间存在强的供体-受体相互作用。在TPR研究中，与二氧化硅载体不同，AlSBA-15调节了各种接枝氧化铁物种的还原性能，这可以通过将铁还原峰移至436°C的高温来证明。在销毁200 ppm苯酚中，24wt％Fe / AlSBA-15催化剂表现出100％的苯酚转化率和86％的TOC去除率，反应30分钟内浸出0.4 ppm（0.1％）的铁。24wt％Fe / SBA-15催化剂也表现出相似的性能，但是，发现铁的浸出高达20 ppm（8％）。
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