Performance of metal free g-C3N4 reinforced graphene oxide bio-composite for the removal of persistent dyes
Graphitic carbon nitride/graphene oxide (g-C3N4@GO/ Carboxy methylcellulose) based bio-composite was prepared, characterized and tested for the degradation of toxic dyes. Cellulose was extracted from coconut coir/spathe through acid hydrolysis and ultrasonication method. Followed by modification usi...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
KeAi Communications Co., Ltd.
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/4991bf1ad94a4bd68921bb6aa627893b |
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| Sumario: | Graphitic carbon nitride/graphene oxide (g-C3N4@GO/ Carboxy methylcellulose) based bio-composite was prepared, characterized and tested for the degradation of toxic dyes. Cellulose was extracted from coconut coir/spathe through acid hydrolysis and ultrasonication method. Followed by modification using the carboxymethylation process and subsequently loaded with graphene oxide and g-C3N4. The prepared carboxy methylcellulose (CMC), g-C3N4@GO, g-C3N4@GO/CMC biocomposite were analyzed by Fourier transform infrared spectrometer (FTIR), scanning electron microscope (SEM) with energy dispersive X-ray analysis (EDX), X-ray diffractometer (XRD) and thermogravimetric analyzer (TGA). The photocatalytic activity of synthesized biocomposite was investigated for the degradation of basic green 4 (BG 4) and basic blue 9 (BB 9) dyes from aqueous solution using batch experiments under sunlight irradiation. The percentage of degradation of BG4 and BB9 was 94 and 98% under sunlight irradiation for 60 and 50 min in basic medium respectively. The photodegradation process is well described by the Langmuir- Hinshelwood and pseudo-first-order kinetic models. From the active species trapping experiment, it was found that the hole (h+), superoxide radical (O2·−), and hydroxyl radical (OH.) played a significant role in the degradation of dyes and a possible degradation path is discussed with the results obtained from LC-MS. Moreover, the biocomposite showed higher stability and reusability for the degradation of dyes upto five cycles. Thus, the prepared g-C3N4@GO/CMC biocomposite can serve as a sustianable material in the current scenario for removing dyes. |
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