Details

Autor(en) / Beteiligte

• Liew, Aaron Shun Yao
• Nguang, Sing Yew
• Minggu, Lorna Jeffrey
• Tahir, Norini
• Moh, Pak Yan

Titel

Graphene oxide incorporated amino‐functionalized iron terephthalate composite as a heterogeneous Fenton‐like catalyst

Ist Teil von

• Journal of the Chinese Chemical Society (Taipei), 2021-10, Vol.68 (10), p.1887-1896

Ort / Verlag

Weinheim: Wiley‐VCH Verlag GmbH & Co. KGaA

Erscheinungsjahr

2021

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Amino‐functionalized iron terephthalate metal–organic framework (NH2‐MIL‐88B) has been studied for its adsorption and catalytic properties due to its high surface area and unique topological architecture. Functionality of the material can be improved through surface modification to increase active sites for the targeted applications. In this study, graphene oxide (GO) was incorporated to the NH2‐MIL‐88B material to obtain composite with improved adsorption and catalytic properties. The results showed that GO/NH2‐MIL‐88B in dark (as GO/NH2‐MIL‐88B/Dark system) was capable to adsorb 28.1% of methylene blue (MB) in water, which is about twice the adsorption of MB by the NH2‐MIL‐88B material in dark (as NH2‐MIL‐88B/Dark system). Furthermore, with the presence of hydrogen peroxide (H2O2), the GO/NH2‐MIL‐88B composite in dark condition (as GO/NH2‐MIL‐88B/H2O2/Dark) and the GO/NH2‐MIL‐88B composite under ultraviolet‐A (UV‐A) irradiation (as GO/NH2‐MIL‐88B/H2O2/UV‐A) have shown promising Fenton‐like behavior, which have removed 72.2% and 92.3% of MB in water, respectively. The removal of MB was well fitted to the Langmuir–Hinshelwood pseudo‐first order kinetics model with the reaction rate constant, k1 = 0.0221 min−1 and k1 = 0.0426 min−1 for GO/NH2‐MIL‐88B/H2O2/Dark and GO/NH2‐MIL‐88B/H2O2/UV‐A system, respectively. This study implies that the GO/NH2‐MIL‐88B composite can be a good catalyst for the heterogeneous Fenton‐like degradation of cationic pollutants in water. GO/NH2‐MIL‐88B was found a good heterogeneous Fenton‐like catalyst towards the removal of MB in water. Exceptional degree of MB removal by GO/NH2‐MIL‐88B/H2O2/UV‐A system was attributed to the reversible photo Fenton‐like process triggered by the redox interaction between Fe2+ and Fe3+ in the framework of the composite, in which under sufficient amount of H2O2 and UV‐A irradiation, favorable amount of ˙OH and HO2˙ were produced for nonselective degradation of MB.