TY - JOUR
T1 - Synthesis of piliostigma reticulatum decorated TiO2based composite and its application towards Cr(VI) adsorption and bromophenol blue degradation
T2 - Nonlinear kinetics, equilibrium modelling and optimisation photocatalytic parameters
AU - Mouhamadou, Sali
AU - Dalhatou, Sadou
AU - Obada, David O.
AU - Fryda, Lydia
AU - Mahieu, Angélique
AU - Bonnet, Pierre
AU - Caperaa, Christophe
AU - Kane, Abdoulaye
AU - Massai, Harouna
AU - Zeghioud, Hicham
N1 - Publisher Copyright:
© 2023 Elsevier Ltd.
PY - 2023/2
Y1 - 2023/2
N2 - In this study, the use of wild bio-waste piliostigma fruits as an alternative precursor for titanium dioxide doped carbon and a simple synthesis method for the preparation of novel eco-friendly TiO2-AC (AC stand for activated carbon) based composites following two routes (TiO2-AC1 and TiO2-AC2) were proposed. The structure, morphology, chemical composition, surface area, light absorption and crystalline phase of the composites were systematically characterised using Fourier transform infrared spectroscopy, scanning electron microscopy, BET analysis, Raman spectroscopy, X-ray fluorescence spectrophotometry fundamental parameters and X-ray Diffraction. The adsorptive capability of the composites were tested towards Cr(VI) elimination and the Box Behnken Design (BBD) with a desirability function was implemented to optimise the photocatalytic parameters towards Bromophenol Blue (BPB) dye degradation. As a result, high adsorption quantity of 3.46 mg/g (TiO2-AC1) and 3.49 mg/g (TiO2-AC2) were obtained at optimum adsorption parameters. Kinetics study showed a good nonlinear fit with pseudo second order and isotherms modelling are well described by Sips and Marczewski-Jaroniec models. The degradation efficiency of bromophenol blue (BPB) by the TiO2-AC2 composite reached 100%, however 57.90% only was recorded for TiO2 at about 180 min of UV irradiation. The kinetics of degradation followed pseudo first order model and the optimal conditions provided by the response surface methodology (RSM) was pH 3, photocatalyst dose 300 mg/L and salt interference of 10 mg/L. This trend proposed a mechanism for preparation of biomass-based TiO2-AC composite and revealed that the use of RSM optimisation process contributes to save time and ensure proper materials handling through degradation as a sustainable water treatment technology.
AB - In this study, the use of wild bio-waste piliostigma fruits as an alternative precursor for titanium dioxide doped carbon and a simple synthesis method for the preparation of novel eco-friendly TiO2-AC (AC stand for activated carbon) based composites following two routes (TiO2-AC1 and TiO2-AC2) were proposed. The structure, morphology, chemical composition, surface area, light absorption and crystalline phase of the composites were systematically characterised using Fourier transform infrared spectroscopy, scanning electron microscopy, BET analysis, Raman spectroscopy, X-ray fluorescence spectrophotometry fundamental parameters and X-ray Diffraction. The adsorptive capability of the composites were tested towards Cr(VI) elimination and the Box Behnken Design (BBD) with a desirability function was implemented to optimise the photocatalytic parameters towards Bromophenol Blue (BPB) dye degradation. As a result, high adsorption quantity of 3.46 mg/g (TiO2-AC1) and 3.49 mg/g (TiO2-AC2) were obtained at optimum adsorption parameters. Kinetics study showed a good nonlinear fit with pseudo second order and isotherms modelling are well described by Sips and Marczewski-Jaroniec models. The degradation efficiency of bromophenol blue (BPB) by the TiO2-AC2 composite reached 100%, however 57.90% only was recorded for TiO2 at about 180 min of UV irradiation. The kinetics of degradation followed pseudo first order model and the optimal conditions provided by the response surface methodology (RSM) was pH 3, photocatalyst dose 300 mg/L and salt interference of 10 mg/L. This trend proposed a mechanism for preparation of biomass-based TiO2-AC composite and revealed that the use of RSM optimisation process contributes to save time and ensure proper materials handling through degradation as a sustainable water treatment technology.
KW - Adsorption
KW - Box Behnken Design
KW - Bromophenol blue
KW - Cr(VI)
KW - Optimisation
KW - Photocatalysis
UR - http://www.scopus.com/inward/record.url?scp=85146495146&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2023.109273
DO - 10.1016/j.jece.2023.109273
M3 - Article
AN - SCOPUS:85146495146
SN - 2213-3437
VL - 11
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 1
M1 - 109273
ER -