Green SBA-15 as a Fenton Catalytic Support for Efficient Degradation of Indigo Carmine
Pornpan Namkhang and Paisan Kongkachuichay* Author for corresponding; e-mail address: pnamkhang@npu.ac.th
Volume: Vol.49 No.5 (September 2022)
Research Article
DOI: https://doi.org/10.12982/CMJS.2022.084
Received: 22 March 2022, Revised: 17 July 2022, Accepted: 18 July 2022, Published: -
Citation: Namkhang P. and Kongkachuichay P., Green SBA-15 as a Fenton Catalytic Support for Efficient Degradation of Indigo Carmine, Chiang Mai Journal of Science, 2022; 49(5): 1344-1354. DOI 10.12982/CMJS.2022.084.
Abstract
Green mesoporous SBA-15 was synthesized by using corn stack ash (CSA), a new renewable silica source, as the main raw material. 80 wt% sodium silicate solution from CSA was mixed with a tetraethyl orthosilicate (TEOS) solution, and fi nally after a hydrothermal process, mesoporous SBA- 15 was obtained. Subsequently, iron metal was incorporated into the prepared SBA-15 and used as an effi cient Fenton catalyst for degradation of indigo carmine (IC) under various conditions. Effects of various parameters of the Fenton process: initial pH, H2O2 concentration, Fe content, and reaction temperature were studied. It was observed that Fe2O3/80CSBA demonstrated good activity not only for a wide range of pH (both of acidic and basic conditions), but also at room temperature. Using the optimum condition, 98% of IC removal can be reached within 10 min. Moreover, the catalyst exhibited long-term stability and strong resistance to leaching of Fe species, while incorporating metal only 0.5 wt% of metal.