Metal organic framework anchored onto biowaste mediated carbon material (rGO) for remediation of chromium (VI) by the photocatalytic process

S Sathish; Satish Kumar K; Siddharth U; D Prabu; M Karthikeyan; Venkatesan D; Supriya S; Andal P; Omirserik Baigenzhenov; J Aravind Kumar

doi:10.1016/j.chemosphere.2024.141963

Metal organic framework anchored onto biowaste mediated carbon material (rGO) for remediation of chromium (VI) by the photocatalytic process

Chemosphere. 2024 Apr 11:357:141963. doi: 10.1016/j.chemosphere.2024.141963. Online ahead of print.

Authors

Affiliations

¹ Department of Chemical Engineering, Sathyabama Institute of Science and Techology, Chennai, Tamilnadu, India, 600119. Electronic address: sathish.chemical@sathyabama.ac.in.
² Department of Chemical Engineering, Sathyabama Institute of Science and Techology, Chennai, Tamilnadu, India, 600119.
³ Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai, India.
⁴ Department of Chemistry, School of Basic Sciences, Vels Institute of Science and Technology, Chennai, India.
⁵ Department of Metallurgical Engineering, Satbayev University, Almaty, Kazakhstan.
⁶ Department of Energy and Environmental Engineering, Saveetha School of Engineering, SIMATS, Saveetha University, Chennai, 602105, Tamilnadu, India. Electronic address: arvindhjsbu@gmail.com.

PMID: 38614397
DOI: 10.1016/j.chemosphere.2024.141963

Abstract

Groundwater contaminated with hexavalent chromium Cr(VI) causes serious health concerns for the ecosystem. In this study, a hybrid amino functionalized MOF@rGO nanocatalyst was produced by utilization of a biowaste mediated carbon material (reduced graphene oxide; rGO) and its surface was modified by in situ synthesis of a nanocrystalline, mixed ligand octahedral MOF containing iron metal and NH₂ functional groups and the prepared composite was investigated for Cr (VI) removal. The photocatalytic degradation of Cr(VI) in aqueous solutions was carried out under UV irradiation. Using a batch mode system, the effect of numerous control variables was examined, and the process design and optimization were carried out by response surface methodology (RSM). The photocatalyst, NH₂-MIL(53)-Fe@rGO, was intended to be a stable and highly effective nanocatalyst throughout the recycling tests. XRD, SEM, EDS, FTIR examinations were exploited to discover more about surface carbon embedded with MOF. 2 g/L of NH₂-MIL-53(Fe)/rGO was utilized in degrading 200 mg/L of Cr(VI) in just 100 min, implying the selective efficacy of such a MOF-rGO nanocatalyst. Moreover, the E_g determinations well agreed with the predicted range of 2.7 eV, confirming its possibility to be exploited underneath visible light, via the Tauc plot. Thus, MOF anchored onto biowaste derived rGO photo-catalyst was successfully implemented in chromium degradation.

Keywords: Biowaste; Carbon surface; Solvo-thermal; Sustainable development; Synthesis; Treatment.