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Synergetic influence between adsorption and photodegradation of Rhodamine B using synthesized fly ash based inorganic polymer
Surfaces and Interfaces ( IF 5.7 ) Pub Date : 2021-04-14 , DOI: 10.1016/j.surfin.2021.101136
Marouane El Alouani , Saliha Alehyen , Hamza El Hadki , Hamid Saufi , Alaaeddine Elhalil , Oum Keltoum Kabbaj , M'hamed Taibi

Modification of fly ash using alkaline activator medium was implemented to develop fly ash-based inorganic polymer composite as an adsorbent and catalyst. The Physico-chemical properties of prepared material were characterized using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy with Energy Dispersive X-ray (SEM/EDX), Transmission Electron Microscopy (TEM), Brunauer–Emmett–Teller (BET), Particle Size Analyzer (PSA) and UV–Vis spectroscopy (UV–Vis) analysis methods. Experimental and theoretical studies were done for the adsorption of Rhodamine B (Rh-B) on the inorganic polymer as an adsorbent. The effect of contact time was evaluated to characterize the mechanism of the Rh-B dye adsorption and photodegradation processes by inorganic polymer composite. The XRD, FTIR, SEM, PSA, and TEM characterizations showed the formation of new composite material. The bandgap of the inorganic polymer is found to be around 3.72 eV, proving the semiconductor state of this material. For a concentration of 30 mg/g, the efficiencies reach approximately 62.45 % and 31.62 %, respectively for adsorption and photodegradation processes leading to a synergistic efficiency of approximately 94.07 %. The kinetic data of Rh-B dye adsorption-photodegradation on the inorganic polymer composite were in good agreement with the pseudo-first-order model. Experimental and theoretical studies produce comparable results. From these conclusions, the inorganic polymer composite had great potential as an economical and efficient adsorbent and catalyst for removing Rh-B dye from aqueous solutions. Its application possibilities are important for the degradation and elimination of hazardous pollutants present in water.



中文翻译:

合成粉煤灰基无机聚合物对罗丹明B的吸附与光降解的协同影响

使用碱性活化剂介质对粉煤灰进行了改性,以开发粉煤灰基无机聚合物复合材料作为吸附剂和催化剂。使用X射线衍射(XRD),傅里叶变换红外光谱(FTIR),能量色散X射线扫描电子显微镜(SEM / EDX),透射电子显微镜(TEM),Brunauer表征所制备材料的理化性质–Emmett–Teller(BET),粒度分析仪(PSA)和UV–Vis光谱法(UV–Vis)分析方法。对罗丹明B(Rh-B)在无机聚合物上作为吸附剂的吸附进行了实验和理论研究。评估了接触时间的影响,以表征无机聚合物复合材料对Rh-B染料的吸附和光降解过程的机理。XRD,FTIR,SEM,PSA,TEM表征表明形成了新的复合材料。发现无机聚合物的带隙为约3.72eV,证明了该材料的半导体状态。对于30 mg / g的浓度,吸附和光降解过程的效率分别达到约62.45%和31.62%,从而产生约94.07%的协同效率。Rh-B染料在无机聚合物复合材料上吸附-光降解的动力学数据与拟一级模型吻合良好。实验和理论研究得出了可比的结果。从这些结论来看,无机聚合物复合物作为从水溶液中去除Rh-B染料的经济有效的吸附剂和催化剂具有巨大的潜力。

更新日期:2021-04-22
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