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Photocatalytic wet peroxide assisted degradation of Orange II dye by reduced graphene oxide and zeolites
Journal of Chemical Technology and Biotechnology ( IF 2.8 ) Pub Date : 2020-08-09 , DOI: 10.1002/jctb.6547
Shital D Ovhal 1, 2 , Carmen SD Rodrigues 1 , Luis M Madeira 1
Affiliation  

Photocatalytic degradation of Orange II (OII) dye has been carried out with commercially available materials, namely sodium Y zeolite (NaY), ammonium Y zeolite (NH4Y), and reduced graphene oxide (RGO). The catalysts were characterized by N2 adsorption at −196 °C, pH at the point of zero charge (pHpzc), and ultraviolet/visible (UV/Vis) diffuse reflectance absorbance. The initial screening of processes like adsorption, oxidation with hydrogen peroxide alone, direct photolysis, combination of H2O2 with the catalyst, and/or with UV/Vis radiation has been done. For the process with better performance (radiation combined with the oxidant and using the materials as photocatalysts), a parametric study was carried out to evaluate the effect of pH, H2O2 concentration, catalyst dose, radiation intensity, and radiation type (UV/Vis or visible radiation) in OII degradation and mineralization.

中文翻译:

光催化湿式过氧化物通过还原的氧化石墨烯和沸石辅助降解橙色II染料

Orange II(OII)染料的光催化降解已通过可商购的材料进行,即钠Y沸石(NaY),铵Y沸石(NH 4 Y)和还原型氧化石墨烯(RGO)。催化剂的特征是在-196°C的N 2吸附,零电荷点的pH(pH pzc)和紫外/可见(UV / Vis)漫反射吸收率。初步筛选过程,如吸附,仅用过氧化氢氧化,直接光解,H 2 O 2结合用催化剂和/或用UV / Vis辐射已经完成。对于性能更好的过程(辐射与氧化剂结合并使用该材料作为光催化剂),进行了参数研究,以评估pH,H 2 O 2浓度,催化剂剂量,辐射强度和辐射类型(UV)的影响/ Vis或可见辐射)导致OII降解和矿化。
更新日期:2020-08-09
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