Preparation and Characterization of Macroalgae Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability
Open Access
- 13 September 2018
- Vol. 11 (9), 1709
- https://doi.org/10.3390/ma11091709
Abstract
In this study, carbonized kelp biochar (AKB) modified by KOH impregnation and photocatalytic Bi2MoO6/AKB composite (BKBC) nanomaterials were the first time successfully synthesized for efficient removal of dyes in aqueous solution. BET, XRD, FT-IR, and SEM were employed to characterize as-prepared samples. UV-vis and other test results indicated that the removal efficiency of methylene blue (MB) was 61.39% and 94.12% for BKBC and AKB, respectively, which was up to 13 times and 20 times higher in comparison with pure Bi2MoO6 (PBM). In addition, the equilibrium adsorption capacity of MB could reach up to 324.1 mg/g for AKB. This high dyes adsorption performance could be likely attributed to its high specific surface area (507.177 m2/g) and its abundant presence of various functional groups such as –OH and =C–H on AKB. Particularly, the existing of amorphous carbon and transition metal oxides, such as Fe2O3 and Mn5O8, could be beneficial for the photodegradation of MB for AKB. Meanwhile, experimental data indicated that adsorption kinetics complied with the pseudo-second order model well, and all of the tests had satisfactory results in terms of the highly efficient adsorption and photodegradation activity of AKB nanomaterials, which suggested its great potential in wastewater treatment.Keywords
This publication has 44 references indexed in Scilit:
- Production of biobriquettes from carbonized brown seaweedFuel Processing Technology, 2013
- Preparation of activated carbon from Turbinaria turbinata seaweeds and its use as supercapacitor electrode materialsComptes Rendus. Chimie, 2013
- Adsorptional photocatalytic degradation of methylene blue onto pectin–CuS nanocomposite under solar lightJournal of Hazardous Materials, 2012
- Preparation and photoelectrochemical properties of functional carbon nanotubes and Ti co-doped Fe2O3 thin filmsInternational Journal of Hydrogen Energy, 2012
- Adsorption of phenol onto activated carbon from seaweed: Determination of the optimal experimental parameters using factorial designJournal of the Taiwan Institute of Chemical Engineers, 2011
- One-dimensional Bi2MoO6/TiO2 hierarchical heterostructures with enhanced photocatalytic activityCrystEngComm, 2011
- Significant enhancement of the visible photocatalytic degradation performances of γ-Bi2MoO6 nanoplate by graphene hybridizationJournal of Molecular Catalysis A: Chemical, 2011
- A novel BiVO4 hierarchical nanostructure: controllable synthesis, growth mechanism, and application in photocatalysisCrystEngComm, 2010
- Classification of macroalgae as fuel and its thermochemical behaviourBioresource Technology, 2008
- Preparation of carbon nanotube-supported Fe2O3 catalysts and their catalytic activities for ethylbenzene dehydrogenationNew Carbon Materials, 2007